Understanding the correct punctuation of transitional phrases like “in fact” can greatly impact the clarity and flow of your writing. This guide outlines the rules for using commas after “in fact,” providing clear examples to illustrate correct and incorrect usage.
When to Use a Comma After “In Fact”
Rule 1: Beginning of a Sentence
Correct Usage:
- In fact, the study disproves the theory.
- In fact, she arrived before everyone else.
Incorrect Usage:
- In fact the study disproves the theory.
- In fact she arrived before everyone else.
Explanation: When “in fact” starts a sentence, it’s typically followed by a comma to separate it from the main clause.
Rule 2: Middle of a Sentence
Correct Usage:
- The results are, in fact, quite surprising.
- She is, in fact, the only expert in this area.
Incorrect Usage:
- The results are in fact quite surprising.
- She is in fact the only expert in this area.
Explanation: When “in fact” is inserted in the middle of a sentence to add emphasis or clarify, it should be enclosed by commas.
Rule 3: Before “In Fact” at the End of a Sentence
Correct Usage:
- She won the award, in fact.
- The project was a success, in fact.
Incorrect Usage:
- She won the award in fact.
- The project was a success in fact.
Explanation: A comma before “in fact” at the end of a sentence emphasizes the statement, especially in formal writing.
Rule 4: “In Fact” Without Commas for Emphasis
Correct Usage:
- She did in fact call him yesterday.
- They have in fact decided to join us.
Incorrect Usage:
- She did, in fact, call him yesterday.
- They have, in fact, decided to join us.
Explanation: When “in fact” is used to emphasize without interrupting the sentence flow, commas are not needed.
Rule 5: After “In Fact” in a Response
Correct Usage:
- “Did you enjoy the concert?” “In fact, I loved it.”
- “Will you attend the meeting?” “In fact, I plan to speak.”
Incorrect Usage:
- “Did you enjoy the concert?” “In fact I loved it.”
- “Will you attend the meeting?” “In fact I plan to speak.”
Explanation: In responses, “in fact” is often followed by a comma when leading into a further statement or explanation.
Read More: Is There a Comma After “Here”?
Rule 6: “In Fact” with Conjunctions
Correct Usage:
- It is, in fact, a significant discovery, and it will change our approach.
- The idea was, in fact, brilliant, but it was too costly to implement.
Incorrect Usage:
- It is in fact, a significant discovery, and it will change our approach.
- The idea was in fact, brilliant, but it was too costly to implement.
Explanation: When “in fact” is used with conjunctions like “and” or “but” to add emphasis in the middle of a sentence, it should be enclosed by commas.
Rule 7: Emphasizing a Single Word or Phrase
Correct Usage:
- He was in fact the earliest to suggest this solution.
- They were in fact ready to start immediately.
Incorrect Usage:
- He was, in fact, the earliest to suggest this solution.
- They were, in fact, ready to start immediately.
Explanation: For direct emphasis on a word without interrupting the sentence flow, “in fact” does not require commas.
Rule 8: “In Fact” in a List
Correct Usage:
- The festival featured, in fact, a wide array of musicians.
- The benefits include, in fact, free access to the gym.
Incorrect Usage:
- The festival featured in fact, a wide array of musicians.
- The benefits include in fact, free access to the gym.
Explanation: When “in fact” is used to add emphasis within a list, it’s typically preceded by a comma.
Rule 9: Contrast or Concession
Correct Usage:
- It seemed insignificant; in fact, it was critical.
- The task appeared easy; in fact, it was quite complex.
Incorrect Usage:
- It seemed insignificant in fact, it was critical.
- The task appeared easy in fact, it was quite complex.
Explanation: Use a semicolon before and a comma after “in fact” when it introduces a contrast or concession for enhanced readability.
Rule 10: “In Fact” for Reinforcement
Correct Usage:
- Your contribution was very much appreciated, in fact.
- This is, in fact, one of our biggest challenges.
Incorrect Usage:
- Your contribution was very much appreciated in fact.
- This is in fact one of our biggest challenges.
Explanation: A comma can serve to reinforce the statement, making “in fact” act as a powerful tool for emphasis or clarification.

Dariel Campbell is currently an English instructor at a university. She has experience in teaching and assessing English tests including TOEFL, IELTS, BULATS, FCE, CAE, and PTEG. With over a decade of teaching expertise, Dariel Campbell utilizes his knowledge to develop English lessons for her audience on English Overview.