Enquiry vs Inquiry: What's the Difference?

August 13, 20264 min readKarin Littlewood

Curious why your British friend makes an enquiry, while your American colleague files an inquiry? One word, two spellings, and a genuine difference in use.

Both refer to a request for information about something, and they share a meaning. In American English, "inquiry" is a noun for a question or a process used to find out more about something, usually in formal investigations or other official situations. In British English, "enquiry" is a noun for a request for more information in a general way, used when the speaker is not looking for a detailed answer.

The same split carries into the verbs: you inquire in the formal sense and enquire in the casual one. "I called the doctor to inquire about my blood test results." "They sent an email to enquire about ticket prices for the concert."

Enquiry vs inquiry, side by side

	Enquiry	Inquiry
Mainly used in	British English	American English
Register	General or casual questions.	A formal investigation or a search for detailed answers.
Verb form	enquire	inquire
Example	I made an enquiry about the holiday packages.	A government inquiry was launched to address the concerns.
Example	There was an enquiry into the history of the building.	The school held an inquiry about student complaints.

When to use "inquiry"

Use inquiry when you are talking about a more formal process of seeking information, usually for a serious purpose. It is the kind of questioning that goes deeper: investigating something for a business, a legal matter, or an academic project.

If you are looking into why a product failed in the market, you conduct an inquiry. That is not a casual question; it is gathering detail in order to uncover something.

"The company launched an inquiry into the cause of the data breach." (Formal investigation)
"The police are conducting an inquiry into the missing person's case." (Official investigation)

When to use "enquiry"

Use enquiry when you are asking for information in a less formal or official context. This is the word for everyday situations, where you want a quick answer to a straightforward question and no deep investigation is involved.

"I made an enquiry about the pricing for the new gym membership."
"He sent an enquiry to the car rental company asking about the weekend discounts."

Do not get caught out in academic work

Confusable pairs change meaning, not just spelling

English is full of pairs like this one, and like "to" and "too." Picking the wrong one can shift the meaning and lead to a misunderstanding.

Small mistakes affect how reliable your work looks

In essays, research papers and assignments, a handful of slips is enough to make otherwise solid writing read as careless.

Let a checker catch the subtle ones

A grammar checker is good at exactly this class of error, where both spellings are real words and only the context tells them apart.

Final words

Enquiry is for the general or casual question; inquiry usually signals a formal investigation. The two terms carry a subtle but real difference between British and American usage.

If you are not sure which one a sentence needs, read it back and ask whether you are requesting information or investigating something. That question settles it almost every time.

Frequently asked questions

Yes. Many British writers now use "inquiry" for both senses, and it is never marked as an error. The traditional split keeps "enquiry" for a general question and "inquiry" for a formal investigation, but that line has been blurring for years. If you follow a house style guide, match it; otherwise "inquiry" is a safe choice either way.

Always "inquiry." American English does not use the "enquiry" spelling at all, whether you are asking a quick question or describing an official investigation. Pair it with the verb "inquire" and you will be right every time.

Yes, the verbs follow the nouns. In British English you "enquire" about something casual ("I enquired about the opening hours") and "inquire" into something formal ("The panel will inquire into the delays"). In American English, "inquire" covers both.

Tie the "in" in "inquiry" to "investigation" — both are formal and both start the same way. That leaves "enquiry" for the everyday question. It is a memory aid rather than a hard rule, and in American English you never need it, since "inquiry" does both jobs.

Related: see the full Grammar & Word Choice guide for more confused-word and punctuation explainers.

Check the confusable words in your draft

Paste your text into the grammar checker and see which word pairs need a second look.

Open the grammar checker