If you have ever wondered whether to say thus far or so far, you are not alone. Both expressions are common in English, and both generally refer to something that has happened or been true up to the present time. The real difference is usually not meaning but tone, style, and context.
Understanding the difference between thus far vs so far can help you choose the right expression for emails, academic writing, professional communication, and everyday conversations. In this guide, we will explain their meanings, usage, examples, common mistakes, synonyms, and American vs. British English preferences.
Quick Answer
Thus far and so far usually mean the same thing: up to this point or until now.
The main difference is formality:
- So far → more common, natural, and conversational
- Thus far → more formal, literary, or academic
Simple examples
So far:
So far, everything is going well.
Thus far:
Thus far, everything has proceeded according to plan.
Both sentences communicate essentially the same idea, but thus far sounds more formal.
What Does So Far Mean?
So far means up to now, until now, or up to this point in time.
It is extremely common in everyday English and can be used when talking about experiences, progress, results, events, or situations.
Examples:
- So far, I have read three chapters.
- The project is going well so far.
- So far, we have received ten applications.
- How is your new job going so far?
- Nothing unusual has happened so far.
The phrase is flexible and works naturally in both spoken and written English.
What Does Thus Far Mean?
Thus far also means up to this point, until now, or up to the present time.
However, it generally sounds more formal than so far.
Examples:
- Thus far, the research has produced promising results.
- The company has performed well thus far.
- Thus far, no significant problems have been reported.
- The investigation has revealed no new evidence thus far.
You are more likely to see thus far in academic papers, formal reports, business writing, legal contexts, and serious journalism than in casual conversation.
Thus Far vs So Far: Main Difference
The most important thing to remember is that there is very little difference in basic meaning.
The difference is primarily about register and tone.
| Feature | Thus Far | So Far |
|---|---|---|
| Basic meaning | Up to now | Up to now |
| Tone | Formal | Neutral and conversational |
| Everyday conversation | Less common | Very common |
| Academic writing | Common | Also acceptable |
| Business writing | Useful | Very common |
| Casual messages | Can sound formal | Natural |
| Meaning | Usually the same | Usually the same |
If you are unsure which one to use, so far is generally the safer choice because it sounds natural in almost every ordinary situation.
When Should You Use So Far?
Use so far when you want your English to sound natural, simple, and conversational.
It works particularly well in:
- Everyday conversations
- Text messages
- Emails
- Informal writing
- Workplace communication
- Social media
- General articles
Examples of So Far
The weather has been great so far.
I have enjoyed the course so far.
We have completed five tasks so far.
How are you finding the new system so far?
So far, there have been no complaints.
These examples sound natural because so far is a very common expression.
When Should You Use Thus Far?
Use thus far when you want a more formal or polished tone.
It is especially appropriate for:
- Academic writing
- Research papers
- Formal reports
- Business reports
- Official documents
- Professional presentations
- Formal journalism
Examples of Thus Far
Thus far, the study has produced encouraging results.
The organization has remained financially stable thus far.
Thus far, the evidence does not support the proposed conclusion.
The team has completed all major stages of the project thus far.
The treatment has shown positive results thus far.
In casual conversation, these sentences might sound unnecessarily formal. In a research report, however, thus far can fit very naturally.
Thus Far vs So Far in Academic Writing
Both expressions can be grammatically correct in academic writing.
However, thus far may sometimes fit a formal academic style better.
For example:
More conversational:
So far, researchers have found limited evidence.
More formal:
Thus far, researchers have found limited evidence.
The second version has a more formal tone, but that does not mean it is automatically better.
Good academic writing should prioritize clarity and precision, not complicated vocabulary. If so far communicates your idea clearly, there is nothing wrong with using it.
Thus Far vs So Far in Everyday English
In everyday English, so far is overwhelmingly the more natural choice.
For example:
How is your new phone working so far?
This sounds completely normal.
How is your new phone working thus far?
This is grammatically understandable, but it sounds unusually formal for an ordinary conversation.
Therefore, when speaking with friends, family, coworkers, or acquaintances, so far will usually be the better option.
Can Thus Far and So Far Be Used Interchangeably?
In many sentences, yes.
For example:
So far, we have completed the project.
Thus far, we have completed the project.
The basic meaning is the same.
However, replacing one with the other can change the tone. The second sentence sounds more formal and deliberate.
This means they are often interchangeable in meaning but not always equally natural in every context.
Common Mistakes with Thus Far and So Far
Mistake 1: Thinking Thus Far Means Something Completely Different
Some learners think thus far means something other than so far.
In many contexts, they have the same meaning.
Thus far = so far = up to now
Mistake 2: Using Thus Far in Every Conversation
Although correct, thus far can sound overly formal in casual situations.
Instead of:
Thus far, I have enjoyed the movie.
A natural conversational speaker would usually say:
I have enjoyed the movie so far.
Mistake 3: Assuming So Far Is Incorrect in Formal Writing
Some learners believe that so far is too informal for professional or academic writing.
That is not necessarily true.
So far is standard English and can be perfectly appropriate in formal writing when the overall style is clear and professional.
Mistake 4: Confusing So Far With Very Far
The phrase so far has more than one possible meaning depending on context.
For example:
I have not traveled so far.
Here, it could relate to distance.
But:
I have not traveled much so far.
Here, so far means until now.
Context determines the meaning.
Thus Far vs So Far With Verb Tenses
Both expressions commonly appear with the present perfect tense because they often describe something that started in the past and continues or has relevance until now.
Examples:
- So far, I have completed six lessons.
- Thus far, we have received positive feedback.
- So far, she has achieved excellent results.
- Thus far, the research has supported the theory.
They can also be used with other structures:
- So far, everything is fine.
- Thus far, no decision has been made.
- So far, we are happy with the results.
The important point is that the expression connects a past-to-present period with the current situation.
Synonyms and Related Expressions
If you want to avoid repeating thus far or so far, you can use several alternatives.
Common Alternatives
- Up to now
- Until now
- Up to this point
- To date
- As of now
- To this point
- Until this point
Some are more formal than others.
For example:
So far, we have received 50 applications.
can become:
To date, we have received 50 applications.
In a formal report, to date may sound particularly appropriate.
American vs British English Differences
There is no major difference between American and British English regarding the meaning of thus far and so far.
Both varieties of English use both expressions.
However, so far is widely used in everyday speech in both American and British English.
Thus far is generally associated with more formal or written styles in both varieties.
Therefore:
- American English: so far is very common; thus far is more formal
- British English: so far is very common; thus far is more formal
This is primarily a difference in register, not geography.
Which One Is Better for Professional Emails?
For most professional emails, so far is perfectly acceptable.
For example:
The project has progressed well so far.
This sounds clear and professional.
If you are writing a particularly formal report, you might choose:
The project has progressed well thus far.
The second sentence sounds slightly more polished and formal.
The best choice depends on your audience and the overall tone of your message.
Which One Should You Choose?
Use this simple guide:
Choose So Far When:
- You want natural everyday English.
- You are speaking casually.
- You are writing a normal email.
- You are texting someone.
- You want maximum clarity.
- You are writing for a general audience.
Choose Thus Far When:
- You want a formal tone.
- You are writing an academic paper.
- You are preparing a formal report.
- You are discussing research findings.
- You want a more literary style.
- The surrounding language is already formal.
When in doubt, choose so far.
FAQs
1. Are thus far and so far the same?
In most contexts, yes. Both mean up to now or until this point. The main difference is tone and formality.
2. Is thus far more formal than so far?
Yes. Thus far generally sounds more formal, while so far is more natural in everyday communication.
3. Can I use so far in academic writing?
Yes. So far is grammatically correct and acceptable in academic writing. However, thus far may fit a particularly formal style.
4. Is thus far grammatically correct?
Yes. It is a standard English expression meaning up to this point or until now.
5. Which is more common, thus far or so far?
So far is much more common in everyday English and general communication.
6. Can thus far and so far be used interchangeably?
Often, yes. They usually have the same meaning, although thus far creates a more formal tone.
7. What are some synonyms for so far?
Common alternatives include up to now, until now, to date, up to this point, and as of now.
8. Which one should I use in conversation?
Use so far in most conversations. It sounds natural, clear, and friendly.
Summary
The expressions thus far and so far generally mean the same thing: up to now, until now, or up to this point. The main difference is not meaning but style. So far is common, natural, and conversational, while thus far has a more formal, academic, professional, or literary feel.
Both expressions are correct in American and British English. If you are speaking casually or writing for a general audience, so far is usually the best choice. If you are preparing a formal report, academic document, or research discussion, thus far can provide a more formal tone without changing the basic meaning.
