Enquiry and inquiry are closely related words, and both refer to asking questions or conducting investigations. The confusion usually comes from British vs. American spelling. They can overlap in meaning, but in British English there is a useful distinction — especially in professional and legal contexts.
Enquiry vs. Inquiry
The Core Difference
In the UK, the distinction is often based on seriousness and formality:
- Enquiry → A general question or request for information.
- Inquiry → A formal investigation, often official or legal.
Although modern usage is flexible, this difference still appears in business writing and government contexts.
Quick memory trick:
- Enquiry starts with E → Think Everyday / Email (simple questions).
- Inquiry starts with I → Think Investigation / Intensive (formal or serious matters).
British English Usage
Enquiry
- We thank you for your enquiry.
- We all desire your early reply to this enquiry.
- Please send your enquiry to our customer service team.
- I made an enquiry about train times.
- She submitted an enquiry form regarding the hotel booking.
In customer service, sales, and everyday communication in the UK, enquiry is preferred.
Inquiry
- The inquiry was formally initiated last month.
- They’ve passed the inquiry over to the police.
- He is now the subject of an official inquiry.
- The public inquiry examined the government’s actions.
- The inquiry was conducted under strict confidentiality.
In legal, governmental, or investigative contexts in the UK, inquiry is usually chosen.
American English Usage
In the United States, inquiry is used for both general questions and formal investigations.
Enquiry is uncommon in American English and may be seen as a spelling error.
American examples:
- We received your inquiry about the product.
- This is a purely personal inquiry.
- The company launched an internal inquiry.
- The inquiry was critical of her work.
- This subject is outside the scope of our inquiry.
Side-by-Side Comparison
| British English | American English |
|---|---|
| Enquiry = General question | Inquiry = General question |
| Inquiry = Formal investigation | Inquiry = Formal investigation |
| Both spellings accepted | Enquiry rarely used |
Professional writing tip:
- Writing for a US audience? Use inquiry in all cases.
- Writing for a UK audience? Use enquiry for customer questions and inquiry for official investigations.
- Writing for a global audience? Inquiry is the safest universal choice.
Last Updated on March 3, 2026
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