Have you ever written a sentence and paused over “thus far” and “so far”? Both expressions talk about what has happened up to a particular point. They can often appear in the same sentence without changing the basic meaning. Yet they don’t always create the same tone.
The main difference is usually style and context, not basic meaning. So far is common in everyday American English and sounds natural in conversations, emails, messages, and general writing. Thus far carries a more formal or literary tone. You’ll see it more often in academic writing, professional reports, formal statements, and serious discussions.
For example:
So far, the project is going well.
Thus far, the project has proceeded according to plan.
Both sentences describe progress up to the present point. However, the second sounds more formal and deliberate.
Understanding this small distinction can help you choose the expression that fits your audience and purpose.
The Quick Answer
So far and thus far generally mean “up to now,” “until now,” or “up to this point.” In many sentences, you can replace one with the other without changing the basic meaning.
The bigger difference is register.
| Expression | Basic Meaning | Typical Tone | Common Contexts |
| So far | Up to now | Natural, conversational | Everyday speech, emails, general writing |
| Thus far | Up to now | Formal, literary, deliberate | Reports, academic writing, formal prose |
| So far | Up to this point | Familiar | Conversations, reviews, progress updates |
| Thus far | Up to this point | More formal | Analysis, official writing, summaries |
Consider these examples:
- So far, I’ve enjoyed the course.
- Thus far, I’ve enjoyed the course.
The meaning is almost identical. The first sounds more natural in ordinary conversation. The second sounds more polished or formal.
That doesn’t mean thus far is always better for formal writing or that so far is too casual for professional communication. Context matters.
A business report can use so far perfectly well:
So far, the team has completed three phases of the project.
Likewise, a formal article can use thus far when the writer wants a more formal tone:
Thus far, the study has produced encouraging results.
So, if you’re looking for the safest everyday choice, so far is usually the expression you’ll want. If the sentence has a formal, academic, analytical, or literary tone, thus far may fit naturally.
What Does “So Far” Mean?
So far means up to now or up to the present point.
It describes something that has happened, developed, changed, or been observed from an earlier point until now.
For example:
So far, everything has gone smoothly.
This means everything has gone smoothly up to now.
You might also say:
I’ve read five chapters so far.
The sentence tells the reader that five chapters have been read up to this point, while the activity may continue.
That’s an important feature of so far. It often connects a past or ongoing situation with the present.
So Far Usually Points Toward the Present
When you use so far, you’re generally looking at a period that reaches the current moment.
For example:
We’ve received twenty applications so far.
The number twenty represents the applications received up to now. More applications may arrive later.
Another example:
The movie is great so far.
The speaker has watched part of the movie and is giving an opinion based on what has happened up to the present point.
This makes so far especially useful when a situation is still developing.
You can use it to discuss:
- progress
- experiences
- results
- achievements
- changes
- observations
- quantities
- events
- ongoing activities
For instance:
So far, we’ve raised enough money for the first phase.
I’ve had no problems with the new software so far.
The weather has been pleasant so far this week.
She has completed four assignments so far.
In each sentence, so far creates a connection between what has already happened and what may happen next.
“So Far” Can Describe Progress
One of the most common uses of so far is to describe progress.
Imagine that you’re working on a large project. Someone asks:
How’s the project going?
You might answer:
It’s going well so far.
This doesn’t necessarily mean the entire project is successful. It means that everything has gone well up to this point.
That’s why so far works naturally with developing situations.
The treatment has worked well so far.
Our new strategy has produced good results so far.
The students have performed well so far.
The speaker leaves room for future developments.
“So Far” Can Describe Personal Experience
You can also use so far when talking about something you’ve experienced.
For example:
I’ve visited three museums so far.
So far, I really like the new neighborhood.
We’ve had a great trip so far.
These sentences focus on the speaker’s experience from the beginning of a period until the present.
Notice how natural so far sounds in everyday conversation. That’s one reason it appears much more often in casual speech than thus far.
When Should You Use “So Far”?
Use so far when you want to say “up to now” or “up to this point” in a natural, familiar way.
It’s especially appropriate when you’re speaking or writing in an everyday context.
You can use it in conversations:
How’s your new job going so far?
In emails:
So far, we’ve received positive feedback from customers.
In informal reports:
The campaign has generated 500 responses so far.
In reviews:
The book is interesting so far.
In personal updates:
I’ve learned a lot so far.
In classroom discussions:
So far, we’ve covered three chapters.
There’s no need to avoid so far simply because you’re writing professionally. It’s a standard English expression, and its conversational quality often makes professional writing sound more direct and accessible.
So Far in Everyday Conversation
If you’re talking to a friend, coworker, family member, or classmate, so far will usually sound completely natural.
How are you liking the course so far?
I’ve watched four episodes so far.
So far, the plan is working.
We’ve had no complaints so far.
Replacing so far with thus far in these sentences wouldn’t normally create a grammar error. It would simply make the language sound more formal than necessary.
For example:
How are you liking the course thus far?
This is grammatically understandable, but it sounds noticeably more formal than the original.
That’s the key point: naturalness depends on context.
So Far in Professional Communication
Professional writers sometimes assume that formal writing requires formal-sounding expressions. That’s not necessarily true.
So far works perfectly well in workplace communication:
So far, the team has completed all scheduled tasks.
We haven’t received any complaints so far.
So far, customer response has been positive.
These sentences are clear, professional, and direct.
Using thus far can create a more formal tone:
Thus far, the team has completed all scheduled tasks.
We have received no complaints thus far.
Thus far, customer response has been positive.
Both versions are grammatically sound. The choice depends on the voice you want.
What Does “Thus Far” Mean?
Thus far also means up to now, until now, or up to this point.
In terms of basic meaning, there is very little difference between thus far and so far.
For example:
Thus far, the investigation has produced no clear answer.
This means:
The investigation has produced no clear answer up to now.
You could replace thus far with so far:
So far, the investigation has produced no clear answer.
The factual meaning remains essentially the same.
The difference is the tone.
Thus far tends to sound more formal, written, literary, or analytical. It can make a sentence feel more deliberate.
You may encounter it in:
- academic papers
- research writing
- official reports
- legal or administrative language
- formal speeches
- historical writing
- literary prose
- analytical articles
For example:
Thus far, the evidence supports the original hypothesis.
This sounds like a statement from a research discussion or formal analysis.
Compare it with:
So far, the evidence supports the original hypothesis.
The second sentence is still perfectly appropriate, but it sounds more straightforward and less formal.
Why “Thus” Sounds More Formal
The word thus itself often has a formal or literary quality.
In English, thus can mean “in this way,” “therefore,” or, in expressions such as thus far, “up to this point.”
Because thus appears frequently in formal prose, the phrase thus far naturally carries some of that tone.
Compare:
So far, the results look promising.
with:
Thus far, the results appear promising.
The second sentence has a more formal rhythm. It doesn’t necessarily communicate more information. It simply presents the information in a different register.
This is why you shouldn’t treat thus far as a more accurate version of so far. It’s primarily a style choice.
When to Use “Thus Far”
Use thus far when the context naturally supports a formal, analytical, or literary tone.
For example:
Thus far, the evidence remains inconclusive.
Thus far, no significant changes have been observed.
The research has thus far focused on adult participants.
Thus far, the committee has approved three proposals.
These sentences would work well in formal reports, academic discussions, and analytical writing.
However, don’t force thus far into every formal sentence. A phrase isn’t automatically better because it sounds more sophisticated.
If so far communicates the idea more naturally, use it.
Thus Far in Formal Reports
Formal reports often describe developments that have occurred up to a particular stage.
For example:
Thus far, the project has remained within its original budget.
This sounds appropriate in a project report.
Another example:
Thus far, the findings have not revealed a significant difference between the two groups.
Here, thus far helps create an analytical tone.
Still, the following is also correct:
So far, the findings have not revealed a significant difference between the two groups.
The difference isn’t grammatical correctness. It’s register.
Thus Far in Academic Writing
Academic writers may use thus far when summarizing the current state of evidence, research, or understanding.
For example:
Thus far, researchers have identified several possible explanations.
Thus far, the available evidence remains limited.
Few studies have thus far examined this particular relationship.
These constructions sound natural because academic writing often favors a more formal register.
However, academic writing doesn’t require thus far. So far can also be appropriate, particularly when the writing aims for clarity and accessibility.
When Should You Use “Thus Far”?
A simple way to decide is to ask yourself what kind of voice your sentence needs.
Choose thus far when you want a more formal or literary expression for “up to now.”
Choose so far when you want a natural, direct, and conversational expression.
For example:
| Situation | Natural Choice |
| Talking with a friend | So far |
| Casual email | So far |
| Everyday conversation | So far |
| Customer update | So far |
| Academic analysis | Thus far or so far |
| Formal report | Thus far or so far |
| Literary prose | Thus far |
| Research discussion | Thus far or so far |
| Formal historical writing | Thus far |
| Simple progress update | So far |
The important point is that this isn’t a strict grammar rule. You aren’t making an error simply because you choose so far in a formal document or thus far in a conversation.
The expressions overlap in meaning.
Your decision should mainly reflect tone, audience, and context.
Why Does “Thus Far” Sound More Formal?
The formal quality of thus far comes largely from the word thus.
Thus is less common in casual conversation than so, especially when speakers mean “up to now.” As a result, thus far can sound more deliberate, polished, or traditional.
Consider this conversation:
How’s the new job going so far?
That sounds completely natural.
Now consider:
How’s the new job going thus far?
It’s understandable, but many speakers would find it unusually formal for an everyday conversation.
The second version may sound more appropriate in writing:
The employee’s performance has been satisfactory thus far.
This difference illustrates an important principle in English: frequency affects perceived naturalness.
An expression can be grammatically correct without being the most natural choice for every situation.
Common Contexts for “Thus Far”
You’ll commonly see thus far when a writer summarizes progress, evidence, findings, or developments.
Research and Academic Writing
Thus far, the evidence has failed to establish a clear relationship.
Business Reports
Thus far, the project has remained on schedule.
Formal Reviews
Thus far, the proposal has received favorable responses.
Historical or Literary Writing
Thus far, the expedition had encountered little resistance.
Formal Analysis
Thus far, the available data suggest several possible explanations.
The expression works particularly well when the writer is taking stock of developments and looking at the current state of a situation.
Grammar Pattern of “Thus Far”
Both thus far and so far generally function as adverbial expressions. They modify the clause by indicating the point in time up to which something is true.
Common patterns include:
Thus far + comma + clause
Clause + thus far
Subject + verb + thus far
Examples:
Thus far, the experiment has produced consistent results.
The experiment has produced consistent results thus far.
The experiment has thus far produced consistent results.
All three positions are possible.
The same basic flexibility applies to so far:
So far, the experiment has produced consistent results.
The experiment has produced consistent results so far.
The experiment has so far produced consistent results.
The exact placement can affect rhythm and emphasis, but it doesn’t fundamentally change the meaning.
“Thus Far” in Real-World Writing
Imagine you’re writing a progress report for a community project.
You could write:
So far, the project has completed the planning stage and begun construction.
This is clear and direct.
You could also write:
Thus far, the project has completed the planning stage and begun construction.
The second version sounds more formal.
Now imagine you’re writing a research paper:
Thus far, the available evidence has produced mixed results.
That sentence fits naturally into an analytical discussion.
But you could also write:
So far, the available evidence has produced mixed results.
There’s nothing grammatically wrong with this version. It simply has a more accessible tone.
Thus Far vs. So Far: The Key Point
The central distinction is easy to remember:
So far = natural and commonly used “up to now.”
Thus far = more formal or literary “up to now.”
Neither expression automatically makes a sentence grammatically better.
If you’re chatting with someone, so far will usually sound more natural.
If you’re writing a formal report, academic analysis, or literary passage, thus far may fit the style more comfortably.
The two expressions overlap so much that replacing one with the other often changes tone rather than meaning.
When in doubt, start with so far. It’s clear, familiar, and widely accepted in American English. Use thus far when the surrounding language calls for a more formal or deliberate register.
Thus Far vs. So Far: Side-by-Side Comparison
Now that you know the basic meaning of thus far and so far, it’s useful to compare them more closely. Both expressions generally mean up to now or up to this point. The main difference is the tone they create.
| Feature | So Far | Thus Far |
| Basic meaning | Up to now | Up to now |
| Grammatical function | Adverbial expression | Adverbial expression |
| Everyday speech | Very common | Less common |
| Conversational tone | Natural | More formal |
| Professional writing | Common | Common |
| Academic writing | Appropriate | Often fits a formal register |
| Literary writing | Possible | Often more natural |
| Formal reports | Appropriate | Appropriate |
| Meaning | Usually the same | Usually the same |
| Main distinction | Familiarity and simplicity | Formality and style |
Consider these pairs:
So far, the meeting has been productive.
Thus far, the meeting has been productive.
Both sentences tell us that the meeting has been productive up to the present point.
The first sounds more conversational. The second sounds more formal.
Another pair makes the difference even clearer:
I’ve enjoyed the book so far.
I’ve enjoyed the book thus far.
The first sounds like something you might say to a friend. The second sounds more literary or deliberate.
Which One Sounds More Natural?
For most everyday situations, so far sounds more natural.
If you’re asking a coworker about a project, you might say:
How’s the project going so far?
If you’re talking about a movie:
It’s pretty good so far.
If you’re discussing a class:
We’ve covered four chapters so far.
These examples feel ordinary because so far is deeply established in everyday English.
Thus far is not incorrect in these situations. It simply sounds more formal:
How’s the project going thus far?
The film has been interesting thus far.
We’ve covered four chapters thus far.
The choice depends on the voice you want.
Everyday Examples with “So Far”
Here are some natural examples of so far:
So far, I’ve had a great experience.
The new restaurant is excellent so far.
We’ve completed most of the work so far.
No one has complained so far.
So far, the weather has been pleasant.
I’ve watched three episodes so far.
The new phone has worked well so far.
So far, everything looks good.
Notice how easily so far fits into personal conversations and casual updates.
It can also appear in workplace writing:
So far, the team has met all its deadlines.
There’s no need to replace it with thus far simply to make the sentence sound professional.
Formal and Professional Examples with “Thus Far”
Thus far is especially useful when a formal tone fits the surrounding text.
For example:
Thus far, the company has met all regulatory requirements.
Thus far, the project remains within the approved budget.
The department has thus far received no formal complaints.
Thus far, the organization has completed three stages of the initiative.
These sentences could appear in reports, official documents, evaluations, or formal correspondence.
Again, so far would still be grammatically correct in each sentence. Thus far simply gives the writing a more formal register.
Academic Examples with “Thus Far”
Academic writing often summarizes what researchers have discovered up to a certain point.
For example:
Thus far, researchers have identified several potential causes.
Thus far, the available evidence remains inconclusive.
Few studies have thus far examined this issue in detail.
The findings thus far suggest that further research is necessary.
These examples show another useful feature of thus far: it can fit comfortably into analytical writing where the writer is reviewing evidence or developments.
However, don’t assume that academic writing requires thus far. Clear academic writing can use so far too.
For example:
So far, researchers have identified several potential causes.
This sentence is direct and easy to understand.
The best choice depends on the desired register and the style of the surrounding passage.
Workplace Examples: “So Far” or “Thus Far”?
Workplace writing is where the distinction can become especially interesting.
Imagine you’re sending a quick update to your manager:
So far, we’ve completed the testing phase.
This sounds natural and professional.
If you’re preparing a formal project report, you might write:
Thus far, the project team has completed the testing phase.
Both are correct.
Here’s another example:
So far, we’ve received positive feedback from customers.
versus:
Thus far, we’ve received positive feedback from customers.
The first feels more direct. The second sounds more formal.
A useful approach is to consider the purpose of the document, not simply whether it is “professional.”
A short team message may benefit from the straightforward so far. A formal report may comfortably use thus far.
A Simple Decision Rule
When choosing between the two, ask:
Would I naturally say “so far” in this situation?
If yes, use so far unless you have a specific reason to create a more formal tone.
Use thus far when the surrounding writing is already formal, analytical, literary, or academic.
A simple memory rule is:
So far = everyday and direct.
Thus far = formal and deliberate.
This isn’t an absolute grammar rule. It’s a practical style guide.
Common Sentence Patterns with “So Far”
Understanding where so far can appear in a sentence makes it easier to use naturally.
The expression is flexible. It can appear at the beginning, in the middle, or at the end of a sentence.
1. At the Beginning
When so far appears at the beginning, it often introduces the speaker’s assessment of a situation.
So far, the project has gone well.
So far, we’ve had no major problems.
So far, the results look promising.
A comma commonly follows so far when it introduces the sentence as an opening adverbial phrase.
This position can give the expression a little more emphasis because the reader encounters the time frame immediately.
Compare:
So far, everything has worked as expected.
with:
Everything has worked as expected so far.
The meaning is essentially the same. The first version foregrounds the time frame.
2. At the End
So far frequently appears at the end of a sentence.
Everything has gone well so far.
We’ve completed three stages so far.
I’ve enjoyed the course so far.
This position is particularly common in conversation.
For example:
How are you liking your new job so far?
That sounds completely natural.
You would not normally need a comma before so far when it appears naturally at the end of a sentence.
3. After the Subject
In some sentences, so far can appear between the subject and the main verb or around the verb phrase.
The team has so far completed three stages.
The study has so far produced mixed results.
She has so far avoided major problems.
This placement is grammatically possible, but it can sound slightly more formal or written than placing so far at the end.
Compare:
The team has completed three stages so far.
The team has so far completed three stages.
Both are correct.
The second version puts greater emphasis on the time frame and can sound more polished in formal writing.
Common Mistakes with “So Far”
Although so far is simple, writers sometimes misuse it because they don’t recognize the time relationship it expresses.
Mistake: Using “So Far” for a Completely Finished Time Period
So far usually connects past events with the present.
That makes it less natural when you’re talking about a period that has completely ended.
For example, this sentence is awkward:
Last year, I visited five countries so far.
The problem is that last year is a finished period, while so far normally looks toward the present.
A better sentence would be:
Last year, I visited five countries.
If you’re talking about the current year, however, so far works naturally:
This year, I’ve visited five countries so far.
The second sentence describes a period that is still connected to the present.
Avoid Finished Past Time Expressions
Be careful when combining so far with expressions such as:
- yesterday
- last year
- last month
- in 2020
- two years ago
- when I was in college
These expressions generally refer to completed periods.
For example:
❌ I read six books last year so far.
Better:
I read six books last year.
Or, if the period is current:
I’ve read six books this year so far.
The issue isn’t that so far can never appear near a past-time expression. The issue is whether the time frame remains connected to the present.
Verb Tense and “So Far”
So far commonly appears with the present perfect because the present perfect connects past events to the present.
For example:
I’ve finished three chapters so far.
We’ve received ten applications so far.
She has completed four assignments so far.
However, the present perfect isn’t the only tense that can occur with so far.
You can also use the present tense:
So far, everything looks good.
You may also encounter the past tense when so far is being used within a specific narrative or time frame:
The plan worked well so far, but problems appeared later.
In many contexts, especially when describing an ongoing situation up to the present, the present perfect will be the most natural choice.
Quick Practice with “So Far”
Choose the sentence that best matches the intended time frame.
A. I have completed four tasks so far.
B. I completed four tasks yesterday so far.
The first sentence works because the activity connects to the present.
The second is awkward because yesterday is a completed time period.
Another example:
A. We’ve received several applications so far this month.
B. We received several applications so far last month.
The first sentence naturally describes an ongoing period. The second combines so far with a finished period and therefore needs revision.
Common Sentence Patterns with “Thus Far”
Like so far, thus far can appear in several positions.
The most common patterns are:
- at the beginning
- in the middle
- at the end
- within passive constructions
The difference is primarily stylistic. The grammatical role remains essentially the same.
1. At the Beginning
At the beginning of a sentence, thus far often creates a formal transition into a current assessment.
Thus far, the evidence has been encouraging.
Thus far, no major problems have been identified.
Thus far, the project has remained on schedule.
The comma after the opening phrase helps separate the introductory expression from the main clause.
This construction is common in reports and formal analysis.
2. In the Middle
Thus far can also appear within a clause.
The study has thus far produced limited evidence.
The company has thus far avoided significant delays.
Researchers have thus far identified three major factors.
This position often sounds particularly formal because the phrase sits inside the main verb structure.
Compare:
Researchers have identified three major factors thus far.
with:
Researchers have thus far identified three major factors.
Both are grammatical. The second has a slightly more formal written rhythm.
3. At the End
You can place thus far at the end of a sentence:
The results have been encouraging thus far.
The project has remained on schedule thus far.
No significant problems have emerged thus far.
This construction is common in formal writing.
In everyday speech, however, most people would probably choose so far:
The results have been encouraging so far.
That version sounds more conversational.
4. With Passive Constructions
Thus far works naturally with passive constructions, especially in formal writing.
For example:
No significant errors have been identified thus far.
Several potential causes have been proposed thus far.
No further action has been required thus far.
You can also move the phrase:
Thus far, no significant errors have been identified.
Both positions work.
The choice depends on sentence rhythm and emphasis.
Common Mistakes with “Thus Far”
Because thus far sounds formal, writers sometimes overuse it or treat it as interchangeable with therefore.
That can create confusion.
Mistake 1: Thinking “Thus Far” Means “Therefore”
In some contexts, thus means therefore or in this way. But thus far is a fixed expression meaning up to now.
For example:
Thus far, the evidence remains limited.
Here, thus far means up to now, not therefore far.
You should understand the entire phrase rather than interpreting thus and far separately.
Mistake 2: Using “Thus Far” Just to Sound Sophisticated
A sentence doesn’t become better simply because you replace so far with thus far.
For example:
I’ve had a great vacation thus far.
This is grammatically fine, but if you’re speaking casually with a friend, so far will usually sound more natural:
I’ve had a great vacation so far.
Formal vocabulary should serve the context rather than distract from it.
Mistake 3: Assuming “Thus Far” Is Always More Correct
There is no general grammar rule saying thus far is more correct than so far.
Both expressions are standard.
The difference is mainly one of register, tone, and frequency.
If your sentence is clear with so far, you don’t need to replace it with thus far merely because you’re writing a formal document.
Mistake 4: Ignoring the Time Frame
Like so far, thus far generally works best when the period being discussed remains connected to the reference point.
For example:
Thus far this year, the company has exceeded its target.
This works because the year is still in progress.
But:
Thus far last year, the company exceeded its target.
is awkward if you simply mean the whole of last year.
A finished period generally calls for a different construction.
Thus Far vs. So Far in Grammar
From a grammatical perspective, thus far and so far perform essentially the same job in many sentences.
They act as adverbial expressions of time, telling the reader that something is true or has happened up to a particular point.
For example:
So far, the results have been positive.
Thus far, the results have been positive.
The grammatical structure is the same:
time expression + comma + main clause
The main difference is the expression chosen.
Their Function in a Sentence
Both expressions can modify a verb phrase or the entire clause.
She has completed five lessons so far.
She has completed five lessons thus far.
They tell us when the action has occurred relative to the present or another relevant reference point.
They can also describe a continuing state:
So far, the plan seems effective.
Thus far, the plan seems effective.
Again, the basic grammatical function remains the same.
Where Can “So Far” and “Thus Far” Appear?
Both expressions can occur in several locations.
Beginning:
So far, the plan has worked.
Thus far, the plan has worked.
Middle:
The plan has so far worked well.
The plan has thus far worked well.
End:
The plan has worked well so far.
The plan has worked well thus far.
The meaning changes very little across these positions.
What changes more noticeably is sentence rhythm and emphasis.
The Key Grammar Rule
The most useful grammar rule is simple:
Use “so far” or “thus far” to indicate what has happened or what is true up to a particular point.
Neither expression changes the basic tense requirements of the sentence.
Instead, the verb tense should match the time relationship you’re describing.
For an ongoing situation connected to the present, the present perfect is especially common:
We have completed three stages so far.
We have completed three stages thus far.
For a current state, the present tense works:
So far, everything looks promising.
Thus far, everything looks promising.
The expression itself doesn’t force one single verb tense in every possible sentence.
Punctuation with “Thus Far” and “So Far”
Punctuation with thus far and so far is generally straightforward. The main thing to remember is that punctuation depends on where the expression appears in the sentence and how it functions.
When either expression appears at the beginning as an introductory phrase, a comma is commonly used.
So far, the project has been successful.
Thus far, the project has been successful.
The comma separates the introductory time expression from the main clause.
When the expression appears at the end of the sentence, you generally don’t need a comma.
The project has been successful so far.
The project has been successful thus far.
The same principle applies when the expression appears naturally within the sentence.
At the Beginning
When so far or thus far begins a sentence, use a comma when the phrase functions as an introductory adverbial.
So far, we’ve received positive feedback.
Thus far, we’ve received positive feedback.
So far, no major problems have occurred.
Thus far, no major problems have occurred.
This punctuation makes the sentence easier to read because the introductory time reference is clearly separated from the main statement.
You may also see the expressions used without a comma in very short or closely connected constructions, but in standard edited prose, a comma after an introductory so far or thus far is often the clearest choice.
At the End
When the expression comes at the end, no comma is normally required.
We’ve received positive feedback so far.
We’ve received positive feedback thus far.
No major problems have occurred so far.
No major problems have occurred thus far.
Adding a comma before the phrase would usually be unnecessary:
❌ We’ve received positive feedback, so far.
Better:
We’ve received positive feedback so far.
The expression is naturally connected to the verb phrase, so there is usually no reason to separate it with punctuation.
In the Middle
Both expressions can also appear in the middle of a sentence.
The team has so far completed the first phase.
The team has thus far completed the first phase.
No commas are normally needed because the expression is integrated into the sentence.
You could also use a parenthetical structure for emphasis in a particular context:
The team has, so far, completed the first phase.
This is possible, but it creates a different rhythm and stronger interruption. In ordinary writing, the simpler version is usually preferable:
The team has so far completed the first phase.
The same applies to thus far.
Which Verb Tense Should You Use?
One of the most important questions about thus far and so far concerns verb tense.
Because both expressions commonly describe something that began in the past and remains relevant to the present, they often appear with the present perfect tense.
For example:
I’ve completed three assignments so far.
I’ve completed three assignments thus far.
The present perfect works well because the activity has occurred before now and remains connected to the current period.
Present Perfect with “So Far”
The present perfect is especially common when you’re counting completed actions within an unfinished time period.
I’ve read five chapters so far.
We’ve received ten applications so far.
She has visited three countries so far this year.
The company has launched four products so far.
These sentences all describe accumulated results up to the present point.
Present Perfect with “Thus Far”
The same pattern works with thus far:
I’ve read five chapters thus far.
We’ve received ten applications thus far.
She has visited three countries thus far this year.
The company has launched four products thus far.
The grammatical relationship remains the same. The primary difference is the register.
Thus far makes the sentences sound more formal or written.
Present Tense with “So Far”
You can also use the present tense when you’re describing a current condition or assessment.
So far, everything looks good.
So far, the plan seems effective.
So far, the weather is pleasant.
Here, the speaker isn’t necessarily counting completed actions. Instead, the speaker is describing the situation as it currently stands.
Present Tense with “Thus Far”
The same construction works with thus far:
Thus far, everything looks good.
Thus far, the plan seems effective.
Thus far, the evidence appears convincing.
The formal tone of thus far can make these sentences particularly suitable for analytical or professional writing.
Can You Use the Past Tense?
Yes, but you need to consider the reference point carefully.
Thus far and so far can appear in narratives where the reference point isn’t necessarily the actual present moment.
For example:
By the middle of the journey, we had traveled farther than expected.
You might encounter thus far in a narrative referring to developments up to a point in the story:
Thus far, the expedition had encountered no serious difficulties.
Here, thus far means up to that point in the narrative, not necessarily up to the speaker’s present moment.
This use is more literary or formal.
The same idea can sometimes be expressed with so far:
So far, the expedition had encountered no serious difficulties.
The meaning is understandable, although thus far may fit the formal narrative style more naturally.
Finished Time Periods Need Care
The key isn’t simply to memorize “use the present perfect with so far.” Instead, pay attention to whether the time period remains open or connected to the reference point.
Compare:
I’ve read six books this year so far.
This works because the year is still being treated as an ongoing period.
Now compare:
I read six books last year.
If you mean the entire completed year, so far is unnecessary.
Likewise:
❌ I read six books last year so far.
This combines a completed period with an expression that normally looks toward an ongoing reference point.
A better version is:
I read six books last year.
Or, if you’re comparing your progress during the current year:
I’ve read six books this year so far.
Practice: Thus Far vs. So Far
Practice can help you recognize when the two expressions are interchangeable and when one sounds more natural because of the context.
In the following examples, both expressions may be grammatically possible unless the context indicates otherwise. Your main task is to think about tone, time frame, and naturalness.
Fill in the Blank
Choose so far or thus far for each sentence.
The project has stayed on schedule ________.
________, we’ve received very positive feedback.
I’ve enjoyed the course ________.
________, the evidence has not provided a clear answer.
The team has completed four stages ________.
________, no major problems have been reported.
I’ve watched three episodes ________.
________, the investigation has revealed several important details.
We’ve had a great trip ________.
________, the company has avoided significant delays.
In many of these sentences, both choices are grammatically possible. The more useful question is which expression fits the intended style.
For casual or conversational situations, so far will often sound more natural.
For formal reports, academic analysis, or literary writing, thus far may fit better.
Answers
The project has stayed on schedule so far.
Thus far, we’ve received very positive feedback.
I’ve enjoyed the course so far.
Thus far, the evidence has not provided a clear answer.
The team has completed four stages so far.
Thus far, no major problems have been reported.
I’ve watched three episodes so far.
Thus far, the investigation has revealed several important details.
We’ve had a great trip so far.
Thus far, the company has avoided significant delays.
Notice that these answers aren’t based on a strict grammar requirement in every case. They illustrate a common style preference: so far for natural everyday language and thus far for a more formal register.
Practice: Choose the More Natural Expression
The next exercise focuses on context.
Read each sentence and decide which expression sounds more natural for the situation.
Rewrite the Sentences
Imagine you’re talking to a friend:
Thus far, I’ve really enjoyed the vacation.
A more natural conversational version is:
So far, I’ve really enjoyed the vacation.
Now imagine you’re writing a formal research report:
So far, the available evidence remains inconclusive.
A formal alternative is:
Thus far, the available evidence remains inconclusive.
The original sentences aren’t necessarily wrong. The revisions simply make the register more consistent with the context.
Try these examples:
Thus far, my new job has been great.
For casual conversation:
So far, my new job has been great.
Another:
So far, the investigation has produced no definitive findings.
For a formal report:
Thus far, the investigation has produced no definitive findings.
Again, context determines which version feels more natural.
Suggested Answers
There isn’t always a single correct answer when you’re choosing between so far and thus far.
That’s because both can often perform the same grammatical function.
Instead, consider the setting.
| Context | Suggested Expression | Reason |
| Talking with a friend | So far | Natural and conversational |
| Text message | So far | Direct and familiar |
| Casual email | So far | Simple and approachable |
| General workplace update | So far | Clear and professional |
| Formal report | Thus far | More formal register |
| Academic analysis | Thus far | Fits analytical prose |
| Literary writing | Thus far | More traditional tone |
| Research discussion | Thus far | Formal and deliberate |
These aren’t strict rules. They’re practical choices based on register.
Spot the Mistake
Look at each sentence and decide whether the problem is grammatical, stylistic, or related to the time frame.
I visited five cities last year so far.
The problem is the time frame. Last year is a completed period.
Better:
I visited five cities last year.
Or:
I’ve visited five cities so far this year.
Another example:
We’ve completed three stages so far last month.
This is also problematic because last month is finished.
Better:
We completed three stages last month.
Or:
We’ve completed three stages so far this month.
Now consider:
How is the project going thus far?
This isn’t grammatically wrong. It simply sounds more formal than most everyday conversations require.
A natural conversational alternative is:
How is the project going so far?
Mini Quiz
Choose the most natural option for each context.
A friend asks about your new apartment:
A. I really like it thus far.
B. I really like it so far.
The natural conversational choice is B.
A research paper discusses current evidence:
A. Thus far, the evidence remains limited.
B. So far, the evidence remains limited.
Both can work, but A better matches a formal academic register.
A manager sends a quick team update:
A. So far, we’ve completed the first phase.
B. Thus far, we’ve completed the first phase.
Both are grammatically correct. A is more direct and conversational.
A formal report summarizes progress:
A. So far, the organization has met its targets.
B. Thus far, the organization has met its targets.
Both are possible. B creates a more formal tone.
The exercise shows why thus far vs. so far isn’t simply a matter of right versus wrong. The surrounding context matters.
How to Practice “Thus Far” and “So Far”
The easiest way to master these expressions is to notice them in real writing and pay attention to the context.
When you encounter so far, ask:
- Is the writing conversational?
- Is the situation still connected to the present?
- Is the writer describing progress or accumulated results?
- Would “up to now” make sense?
When you encounter thus far, ask:
- Is the writing formal?
- Is the writer discussing research, evidence, or progress?
- Does the phrase mean “up to this point”?
- Would so far sound more conversational?
This kind of observation helps you understand the expressions naturally rather than memorizing isolated rules.
Practice by Changing the Register
Take a sentence such as:
So far, the plan has worked well.
Now rewrite it for a more formal report:
Thus far, the plan has worked well.
Then reverse the exercise:
Thus far, the results have been encouraging.
For a casual conversation, you could write:
So far, the results have been encouraging.
The meaning stays essentially the same. Only the register changes.
Practice With Your Own Examples
Create sentences about things that are still developing.
For example:
- a course you’re taking
- a book you’re reading
- a project you’re completing
- a trip you’re enjoying
- a skill you’re learning
- a business you’re building
- research you’re conducting
- a goal you’re pursuing
Write one sentence using so far and another using thus far.
For example:
I’ve learned a lot so far.
Then:
Thus far, the training has provided valuable experience.
The first feels natural in everyday conversation. The second has a more formal, reflective tone.
A Useful Substitution Test
When you’re unsure whether so far or thus far fits, temporarily replace the phrase with up to now.
For example:
So far, the results look promising.
becomes:
Up to now, the results look promising.
The meaning remains clear.
Likewise:
Thus far, the results look promising.
also becomes:
Up to now, the results look promising.
If up to now fits the intended meaning, both so far and thus far may work.
Then make your final choice based on tone.
Everyday tone → so far
Formal or literary tone → thus far
This two-step method separates meaning from style, which is often the easiest way to make the right choice.
Thus Far vs. So Far: Meaning in Different Contexts
The easiest way to understand thus far vs. so far is to separate meaning from tone.
In most contexts, both expressions describe a situation up to a particular point. The point is often the present moment, but it can also be a point established by the surrounding narrative.
The difference becomes clearer when you place both expressions into real situations.
Personal Experiences
When you’re talking about your own experiences, so far usually sounds more natural.
I’ve enjoyed the trip so far.
I’ve learned a lot so far.
So far, the course has been challenging but interesting.
You can use thus far in these sentences, but the tone becomes more formal:
I’ve enjoyed the trip thus far.
This isn’t incorrect. It simply sounds less conversational.
Progress Updates
Both expressions work well when discussing progress.
We’ve completed six tasks so far.
Thus far, we’ve completed six tasks.
The first sounds like a normal progress update. The second sounds more formal and may fit a written report.
Research and Evidence
Thus far can be especially comfortable in research-oriented writing:
Thus far, the evidence has not established a clear connection.
Thus far, researchers have identified several possible explanations.
You can use so far instead:
So far, the evidence has not established a clear connection.
The second version is more direct and accessible.
Business and Project Writing
Both expressions are common in business contexts.
For an informal team message:
So far, everything is on schedule.
For a formal report:
Thus far, everything has remained on schedule.
The distinction isn’t about correctness. It’s about the voice and level of formality appropriate to the document.
Reviews and Opinions
When giving an opinion about something you haven’t finished, so far is particularly natural.
The book is excellent so far.
The show has been entertaining so far.
The game has been fun so far.
These sentences communicate that your judgment is based only on what you’ve experienced up to this point.
Thus far is possible, but it may make the opinion sound more formal than necessary:
The book has been excellent thus far.
That sentence would fit more naturally in a formal review than in a casual conversation.
“So Far” Does Not Always Mean “Finished”
One common misunderstanding is that so far describes something that has already been completed.
It doesn’t.
The expression often describes an ongoing process.
Consider:
I’ve read three chapters so far.
This doesn’t mean you’ve finished the book. It tells the reader how much you’ve read up to the present point.
Likewise:
We’ve sold 500 tickets so far.
This doesn’t mean ticket sales are finished. More tickets may be sold later.
And:
The patient has responded well to treatment so far.
The statement describes the response up to now. It doesn’t necessarily predict what will happen next.
This connection to an ongoing situation is one of the most useful features of so far.
“Thus Far” Can Also Point to a Stage, Not Just the Present
Although thus far often means up to now, it can sometimes refer to a point already established within a discussion or narrative.
For example:
Thus far in the discussion, we’ve identified three major concerns.
Here, thus far means up to this point in the discussion.
Another example:
Thus far in the investigation, no clear motive has been established.
The reference point is the current stage of the investigation.
You can use so far in the same way:
So far in the investigation, no clear motive has been established.
Again, the main difference is register.
“So Far” and “Thus Far” With Time Expressions
Both expressions can combine naturally with certain time expressions.
This Year
I’ve read six books so far this year.
I’ve read six books thus far this year.
The first sounds more natural in ordinary conversation. The second has a formal quality.
This Month
We’ve received twenty applications so far this month.
We’ve received twenty applications thus far this month.
Both work because this month is treated as an ongoing period.
This Week
So far this week, we’ve completed three major tasks.
Thus far this week, we’ve completed three major tasks.
Again, the expressions connect the accumulated activity to the current period.
Today
I’ve answered twenty emails so far today.
I’ve answered twenty emails thus far today.
The first is much more natural in ordinary speech.
Since the Beginning of the Project
You can also use the expressions when the starting point is supplied by context:
We’ve made significant progress so far.
We’ve made significant progress thus far.
The exact starting point doesn’t always need to be stated because the surrounding context can establish it.
Can “Thus Far” and “So Far” Always Be Swapped?
Not always without changing the tone, although they can often be substituted without changing the basic meaning.
Consider:
So far, so good.
This is a very common fixed expression.
It means that things have been satisfactory up to the present point.
You could technically construct:
Thus far, thus good.
But that isn’t a standard English expression.
This shows why you shouldn’t assume that every phrase containing so far can be mechanically changed to thus far.
Some expressions have become established through usage.
“So Far, So Good”
So far, so good is one of the most familiar expressions containing so far.
For example:
How’s the new system working?
So far, so good.
The phrase means that everything has been satisfactory up to now.
It is casual, concise, and widely understood.
If you’re writing a formal report, you would normally express the same idea more directly:
The system has performed satisfactorily thus far.
The second version isn’t a direct replacement of the idiom. It’s a more formal way to communicate the same general idea.
“Thus Far” in Formal and Literary Style
Writers sometimes choose thus far because it matches a formal or literary voice.
For example:
Thus far, the journey had proceeded without incident.
Thus far, the available records had offered little explanation.
The author has thus far avoided making a definitive claim.
The phrase can create a sense of measured reflection. It encourages the reader to consider what has happened up to a particular stage.
This is one reason thus far appears in formal summaries and analytical writing.
However, you should avoid using it simply to make ordinary writing sound sophisticated.
Clear writing doesn’t require unnecessarily formal expressions.
For example, if you’re sending a quick email to a colleague, this is perfectly professional:
So far, everything looks good.
There’s no benefit in changing it to:
Thus far, everything looks good.
unless the more formal tone serves a specific purpose.
“So Far” in American English
In American English, so far is extremely common in everyday communication.
You may hear it in conversations about:
- work
- school
- travel
- entertainment
- food
- weather
- personal experiences
- purchases
- plans
- projects
Examples include:
How’s your new class going so far?
What do you think of the restaurant so far?
I’ve saved enough money so far.
The new software is working well so far.
So far, I haven’t had any problems.
The expression is simple and natural.
That’s why so far is usually the best starting point when you’re unsure which phrase to choose.
“Thus Far” in American English
Thus far is also standard in American English. It isn’t outdated or grammatically incorrect.
Its frequency is simply different.
You are more likely to encounter it in writing that has a formal, analytical, academic, literary, or official character.
For example:
Thus far, the investigation has yielded limited evidence.
Thus far, the study has focused primarily on adults.
The organization has thus far maintained its original objectives.
These sentences sound natural in formal prose.
The important distinction is therefore not American English versus another variety of English. Both expressions are used in American English.
The more useful distinction is:
everyday register versus formal register.
Common Editing Problems
When proofreading a sentence containing thus far or so far, check four things.
Check the Meaning
Ask whether the phrase really means up to now or up to this point.
For example:
I’ve completed three lessons so far.
The meaning is clear.
If you mean something different, another time expression may be needed.
Check the Time Frame
Make sure the time period connects logically to the reference point.
I’ve completed five tasks so far this week.
works naturally.
But:
I completed five tasks last week so far.
doesn’t work if last week is a finished period.
Check the Register
Ask whether the sentence is conversational, professional, academic, literary, or formal.
For casual communication:
So far, the plan is working.
For formal analysis:
Thus far, the plan has produced encouraging results.
Check for Unnecessary Formality
Don’t replace simple words with formal alternatives unless the context calls for them.
A sentence like:
So far, the results look promising.
is already clear and professional.
You don’t need:
Thus far, the results appear promising.
unless the surrounding writing has a consistently formal tone.
Natural Examples: “So Far”
Here are additional examples that show how naturally so far works in everyday English.
So far, everything has gone according to plan.
I’ve really enjoyed the class so far.
We’ve sold more than expected so far.
The weather has been great so far.
She hasn’t missed a deadline so far.
I’ve learned several useful techniques so far.
So far, nobody knows what happened.
The new system has worked well so far.
I’ve only read half the book so far.
The meeting has been productive so far.
These examples cover different situations, but the underlying idea remains the same: the speaker is describing what is true or what has happened up to this point.
Natural Examples: “Thus Far”
Now compare examples using thus far.
Thus far, the evidence has been inconclusive.
Thus far, the project has remained within budget.
The study has thus far produced mixed findings.
Thus far, no significant differences have been observed.
The committee has thus far approved three proposals.
Thus far, the investigation has uncovered several relevant details.
The organization has thus far maintained its original position.
Thus far, researchers have focused on a relatively small sample.
The policy has thus far produced limited results.
Thus far, no additional action has been required.
These sentences have a more formal quality, but they don’t express a fundamentally different time relationship from their so far counterparts.
A Final Comparison in Context
Consider a manager writing a project update.
Casual Team Message
So far, we’ve finished the first two stages, and everything is going well.
This sounds direct and approachable.
Formal Project Report
Thus far, the team has completed the first two stages, and the project remains on schedule.
This sounds more formal and report-like.
Academic Discussion
Thus far, the available evidence has not established a definitive relationship between the variables.
The formal register fits the analytical context.
Everyday Conversation
So far, the new job has been great.
This is the natural conversational choice.
These examples demonstrate why the distinction is best understood as one of register and context, rather than a strict difference in meaning.
Quick Reference: Thus Far vs. So Far
Use this table when you need a quick reminder.
| If You Mean… | Use | Example |
| Up to now in everyday speech | So far | So far, everything is fine. |
| Up to now in casual writing | So far | I’ve enjoyed it so far. |
| Current progress | So far | We’ve finished three tasks so far. |
| An ongoing experience | So far | The trip has been great so far. |
| Up to now in formal writing | Thus far | Thus far, the findings remain limited. |
| Up to this point in a report | Thus far | Thus far, the project has stayed on schedule. |
| Formal research discussion | Thus far | Thus far, the evidence is inconclusive. |
| Literary or formal narrative | Thus far | Thus far, the journey had been uneventful. |
Remember that these are style guidelines, not absolute grammar rules.
The One-Sentence Rule
If you need to remember only one thing about thus far vs. so far, remember this:
“So far” and “thus far” generally mean “up to now,” but “so far” is more natural in everyday English while “thus far” tends to sound more formal.
That single distinction will help you make the right choice in most situations.
When you’re speaking with friends, writing a casual message, giving a simple progress update, or describing an ongoing experience, so far is usually the natural choice.
When you’re writing an academic discussion, formal report, analytical passage, or literary text, thus far may better match the surrounding style.
Neither expression is inherently more correct.
The best choice is the one that communicates your meaning clearly while fitting the tone of your sentence.
Final Practical Test
Before you choose between thus far and so far, run through this quick test:
First, ask what you mean.
If you mean up to now or up to this point, either expression may work.
Next, check the time frame.
Make sure the situation is connected to the relevant present or reference point.
Then, check your audience.
If you’re speaking naturally or writing for a general audience, so far will usually be the easiest choice.
If you’re writing formal or analytical prose, thus far may fit better.
Finally, read the sentence aloud.
If so far sounds natural, there’s usually no reason to replace it simply to sound more sophisticated.
If thus far matches the formal tone of the surrounding passage, keep it.
The goal isn’t to make your English sound complicated. It’s to make it clear, natural, and appropriate for the situation.
Once you understand that thus far and so far usually share the same core meaning, the choice becomes much easier. You’re no longer trying to memorize two competing grammar rules. You’re choosing the expression that best fits your meaning, time frame, audience, and tone.
Conclusion
Understanding thus far vs. so far is much easier once you separate meaning from tone. Both expressions generally mean “up to now” or “up to this point,” so they can often be used in the same sentence without changing the basic idea. The main difference is how they sound. So far is more common, natural, and conversational, making it a great choice for everyday speech, emails, updates, and general writing. Thus far has a more formal, literary, or analytical tone and often fits academic writing, reports, and formal discussions. Neither expression is inherently more correct. The best choice depends on your audience, context, and the tone you want to create. When you’re unsure, so far is usually the simplest and most natural option. Once you understand this distinction, choosing between these two useful expressions becomes quick and effortless.
FAQs
What is the difference between “thus far” and “so far”?
Thus far and so far generally mean the same thing: up to now or up to this point. The main difference is tone. So far is more common in everyday American English and sounds natural and conversational. Thus far is more formal and is often used in academic, professional, analytical, or literary writing.
Is “thus far” more formal than “so far”?
Yes. Thus far generally has a more formal or literary tone than so far. Both expressions are grammatically correct and usually communicate the same basic meaning. For everyday conversations, messages, and casual writing, so far often sounds more natural. In reports, academic discussions, and formal prose, thus far may better match the surrounding style.
Can I use “thus far” and “so far” interchangeably?
In many sentences, yes. Both expressions can mean up to now or up to this point. However, replacing one with the other may change the tone. So far tends to sound more conversational, while thus far sounds more formal. Some fixed expressions, such as “so far, so good,” should not be mechanically changed.
Which is more common in everyday English, “thus far” or “so far”?
So far is much more natural in everyday English. People commonly use it when discussing experiences, progress, plans, movies, books, work, travel, and other ongoing situations. For example, “I’m enjoying the course so far” sounds completely natural. Thus far is understandable but may sound unusually formal in casual conversation.
Is “thus far” correct in American English?
Yes. Thus far is standard and correct in American English. It means up to now or up to this point. It is simply less conversational than so far. You’ll often see it in formal reports, academic writing, research discussions, official documents, and literary prose. It isn’t incorrect or outdated simply because it sounds formal.
Should I use “so far” in professional writing?
Yes. So far is perfectly acceptable in professional writing when it suits the tone. For example, “So far, the team has completed all scheduled tasks” is clear and professional. You don’t need to replace so far with thus far just to sound formal. Choose thus far when a more formal or analytical register genuinely fits the document.
What tense is commonly used with “so far”?
The present perfect tense is especially common with so far because it connects past actions with the present. For example, “We have completed three stages so far.” However, other tenses can also occur depending on context. The important point is that the verb tense should accurately reflect the time relationship being described.
Can “thus far” be used at the beginning of a sentence?
Yes. Thus far can naturally appear at the beginning of a sentence, especially in formal writing. For example, “Thus far, the evidence has remained inconclusive.” A comma is commonly used after the introductory phrase. You can also place thus far in the middle or at the end of a sentence.
Can “so far” be used at the end of a sentence?
Yes. This is one of the most common positions for so far. For example, “I’ve enjoyed the course so far” and “Everything has gone smoothly so far” are natural sentences. When so far appears at the end, a comma is normally unnecessary because the expression connects directly to the preceding clause.
Does “so far” mean that something is finished?
No. So far usually describes what has happened or what is true up to the present point, often while a situation is still continuing. For example, “I’ve read three chapters so far” means the reading may continue. Likewise, “We’ve received ten applications so far” suggests that more applications may arrive later.