Inquiry vs Enquiry: Meaning, Spelling, and Usage Explained

Inquiry and enquiry have the same basic meaning: asking for information or investigating something.

The main difference is regional usage, because inquiry is the standard spelling in American English, while enquiry is common in British English, especially for a general request for information.

British English may also use inquiry for a formal investigation, while enquiry can be used for an everyday question.

This spelling difference exists because English developed different writing habits in different regions.

In this guide, you will learn the meaning, origin, spelling rules, British and American usage, common mistakes, real examples, and simple ways to choose the right form for your audience.

Table of Contents

Quick Answer

Inquiry and enquiry are both correct spellings.

The main difference is where and how they are used:

Inquiry is the standard spelling in American English.
Enquiry is common in British English.
In British English, enquiry often means a general request for information.
In British English, inquiry may be used for a formal investigation.
In American English, inquiry is normally used for both meanings. (Oxford Learner’s Dictionaries)

Examples

British English:

I made an enquiry about the course fees.

The government launched an inquiry into the accident.

American English:

I made an inquiry about the course fees.

The government launched an inquiry into the accident.

So, the easiest rule is:

US English → inquiry

UK English → enquiry for a general question; inquiry is also used, especially for formal investigations

Both forms can mean a question, request for information, or investigation. (Oxford Learner’s Dictionaries)

The Origin of Inquiry vs Enquiry

The two spellings come from the same word family. Their history can be traced through French and Latin forms related to the idea of asking, searching, or investigating.

The Latin verb inquirere meant to seek or investigate. It passed into Old French in forms such as enquerre and then entered Middle English. Over time, English speakers used both inquiry and enquiry. Collins lists the American form as developing from an earlier form related to Middle English enquere. (Collins Dictionary)

The spelling difference is therefore not a case of one word being correct and the other being wrong. Both developed within English.

Regional language habits later made the two forms more distinct.

In the United States, inquiry became the normal spelling for almost every use. In Britain, both forms remained in use. Some British writers developed a useful distinction between them:

enquiry → a general question or request for information
inquiry → a formal investigation

However, this distinction is not absolute. Oxford notes that British English can use either spelling for either meaning. (Oxford Learner’s Dictionaries)

This explains why you may see both spellings in British newspapers, government documents, business writing, and everyday communication.

British English vs American English Spelling

The biggest difference is regional rather than grammatical.

British English

British English commonly uses enquiry when someone asks for information.

Examples:

I sent an enquiry about the job.
Please direct your enquiry to our sales team.
The hotel received several enquiries.
The enquiry desk is near the entrance.

For a formal investigation, inquiry is often preferred:

The government ordered an inquiry.
A public inquiry was launched.
The police began an inquiry into the incident.

Still, British English allows enquiry for investigations too, so the distinction is a convention rather than a strict rule. (Oxford Learner’s Dictionaries)

American English

American English normally uses inquiry for both meanings.

Examples:

I sent an inquiry about the price.
We received several inquiries.
The company opened an inquiry.
Congress launched an inquiry into the matter.

The spelling enquiry is rare in American English. (Dictionary.com)

Inquiry vs Enquiry Comparison Table

Point	Inquiry	Enquiry
American English	Standard	Rare
British English	Common	Common
General question	Yes	Yes
Request for information	Yes	Yes
Formal investigation	Yes	Yes
Common UK preference	Formal investigation	General question
Plural	inquiries	enquiries
Related verb	inquire	enquire

The key point is that inquiry is the safer choice when writing for an American audience, while British writers can choose based on regional convention and context. (Oxford Learner’s Dictionaries)

Which Spelling Should You Use?

Your audience should decide the spelling.

If You Write for an American Audience

Use inquiry.

This applies to:

business emails
websites
academic writing
customer service
news articles
legal writing
formal reports

For example:

Thank you for your inquiry about our services.

Using enquiry in American writing may look unusual because it is not the normal US spelling.

If You Write for a British Audience

You can use enquiry for a general request for information.

For example:

Thank you for your enquiry.

For a formal investigation, inquiry is often the better choice:

The committee launched an inquiry into the matter.

However, British dictionaries recognise both spellings, so enquiry is not automatically wrong when used for an investigation. (Oxford Learner’s Dictionaries)

If You Write for Commonwealth Audiences

Usage can vary.

Countries such as Australia and Canada may use both forms. In Australian English, the two spellings can be interchangeable, while inquiry may be associated with a formal investigation in some contexts. (Wiktionary)

If your organisation has a style guide, follow it.

If You Write for a Global Audience

Inquiry is often the safest spelling because it is widely recognised and is the standard American form.

However, if your website, company, or publication follows British English, enquiry may fit better.

The most important rule is consistency. Do not switch between inquiry and enquiry randomly in the same document.

Common Mistakes with Inquiry vs Enquiry

Mistake 1: Thinking Enquiry Is Wrong

Wrong idea:

Enquiry is an incorrect spelling.

Correction:

Enquiry is a correct English spelling, especially common in British English.

Oxford lists enquiry as a British English form and inquiry as a North American and British form. (Oxford Learner’s Dictionaries)

Mistake 2: Using Enquiry in American English

Less suitable for US English:

Thank you for your enquiry.

Better for US English:

Thank you for your inquiry.

American English normally uses inquiry in both general and formal contexts.

Mistake 3: Assuming Inquiry Only Means Investigation

Some learners think inquiry always means a formal investigation.

That is not true.

It can also mean a simple request for information:

I sent an inquiry about the new product.

Mistake 4: Mixing the Plural Forms

The plural forms follow the spelling:

inquiry → inquiries
enquiry → enquiries

Do not write inquirys or enquirys.

Mistake 5: Changing the Spelling Without Changing the Style

If you use British English throughout an article, use the spelling that matches your chosen style.

For example:

We received several enquiries from customers.

If you use American English:

We received several inquiries from customers.

Consistency makes professional writing look more polished.

Inquiry vs Enquiry in Everyday Examples

The words appear often in professional and everyday communication.

In Emails

British English:

Thank you for your enquiry about our delivery service.

American English:

Thank you for your inquiry about our delivery service.

Both sentences mean the same thing.

In Business Writing

We received several enquiries from potential clients.

This is natural in British English.

For US business writing:

We received several inquiries from potential clients.

In Customer Service

A British company might write:

For further enquiries, please contact our support team.

An American company would normally write:

For further inquiries, please contact our support team.

In News Writing

The word often appears when discussing an official investigation:

The government announced an inquiry into the incident.

The spelling inquiry works naturally in both American and British English for this meaning. (Collins Dictionary)

In Social Media

A company using British English might post:

Have an enquiry about our new service? Send us a message.

A US company might write:

Have an inquiry about our new service? Send us a message.

Social media does not change the spelling rule. The intended English variety still matters.

In Formal Writing

The committee conducted an inquiry into the financial records.

Here, inquiry clearly fits the formal investigation meaning.

For a simple request:

I am writing to make an enquiry about the application process.

This is especially natural in British English.

Inquiry vs Enquiry – Google Trends & Usage Data

Search interest for these words reflects the same regional split seen in dictionaries and everyday writing.

Inquiry has much stronger visibility in the United States because it is the standard American spelling. Enquiry is more strongly associated with British English and appears more often in UK-style business, government, customer service, and general communication.

Google Trends can also show regional differences when the two terms are compared. However, Trends data changes over time and depends on the selected country, date range, and search category, so it is better to treat it as a pattern indicator rather than a fixed measure of total word usage.

The broader dictionary evidence supports the same pattern: American English normally uses inquiry, while British English uses both inquiry and enquiry. (Oxford Learner’s Dictionaries)

Context also matters. Searches connected with customer service, business questions, and information requests may favour enquiry in UK-focused content, while US-focused content will usually use inquiry.

For SEO, this means you should not simply replace one spelling with the other. Match the spelling to your target market.

If your website targets US readers, use inquiry.

If it targets UK readers, enquiry may be useful for general requests, while inquiry remains important for formal investigations.

Inquiry vs Enquiry: Side-by-Side Comparison

Feature	Inquiry	Enquiry
Basic meaning	Question or investigation	Question or investigation
US English	Preferred	Rare
UK English	Common	Common
General request	Correct	Correct
Formal investigation	Preferred	Also possible
Example	Customer inquiry	Customer enquiry
Plural	Inquiries	Enquiries
Verb	Inquire	Enquire
Best for US websites	Yes	No
Best for UK websites	Yes	Yes

The simplest way to remember the difference is:

Inquiry = the standard US spelling

Enquiry = a common UK spelling

FAQs About Inquiry vs Enquiry

1. Is inquiry or enquiry correct?

Both are correct. Inquiry is the standard spelling in American English, while enquiry is especially common in British English. (Oxford Learner’s Dictionaries)

2. Is enquiry British or American?

Enquiry is mainly associated with British English. It is also used in other varieties of English, but it is rare in standard American usage.

3. Is inquiry American or British?

Inquiry is standard in American English and is also used in British English. British writers may use it for both general questions and formal investigations.

4. What is the difference between inquiry and enquiry?

In general, they mean the same thing. In British English, enquiry can refer to a general request for information, while inquiry is often used for a formal investigation. This distinction is not absolute. (Oxford Learner’s Dictionaries)

5. Should I write customer inquiry or customer enquiry?

Use customer inquiry for American English. Use customer enquiry for British English if your organisation follows the common UK convention.

6. What is the plural of inquiry?

The plural is inquiries.

Example:

We received five inquiries yesterday.

The plural of enquiry is enquiries.

7. Is enquiry wrong in American English?

It is not inherently incorrect, but it is uncommon in American English. Inquiry is the normal US spelling, so it is the better choice for American readers.

Conclusion

Inquiry and enquiry are both correct, but inquiry is the standard American spelling, while enquiry is common in British English and is often used for general requests for information.

The practical takeaway is simple: choose inquiry for US English, use enquiry for a general question in UK English when that style is preferred, and use inquiry for formal investigations.

Always keep your spelling consistent with your target audience and publication style.

For another useful spelling guide, see our related post on “inquire vs enquire” to learn how the matching verbs are used.