Acknowledgement or Acknowledgment: Which Spelling Is Correct?

Acknowledgement or Acknowledgment: Which Spelling Is Correct? The answer depends on the English standard you follow. In British English, acknowledgement is common, while American English prefers acknowledgment. Both spellings have the same meaning, but the spelling difference comes from the extra e.

This difference can create confusion for students, writers, and professionals in academic writing, reports, theses, books, and formal communication. Maintaining consistency is essential for clarity, especially when you select the correct spelling for official documents, websites, or academic papers.

When you thank people who helped with your work, you can create an acknowledgments or acknowledgements section. Your style guides, universities, publishers, and regional conventions can help you choose the right form. Following one version consistently prevents common mistakes and keeps your writing professional.

Quick Answer: 

Acknowledgment is the preferred spelling in American English.

Acknowledgement is also correct and is especially common in British English.

The two words have the same basic meanings. They can describe recognizing something as true, showing appreciation for someone’s contribution, or confirming that something has been received. Cambridge gives both spellings and identifies acknowledgment with US English and acknowledgement with UK English usage.

Spelling	Main usage	Correct?
Acknowledgment	American English	✅ Yes
Acknowledgement	British English	✅ Yes
Acknowledgment	British English	✅ Accepted
Acknowledgement	American English	✅ Recognized, but less preferred

For a US-based website, essay, report, email, or article, acknowledgment is the safest choice.

What’s the Difference?

The difference is mainly spelling, not meaning.

Acknowledgment and acknowledgement function as nouns. They can refer to the act of recognizing something, expressing thanks for someone’s contribution, or confirming receipt of something. Cambridge defines acknowledgment in several related senses, including accepting that something is true, thanking someone for their contribution, and confirming that something has been received.

For example:

• The report included an acknowledgment of the team’s contribution.
• She received an acknowledgment after submitting the application.
• The author included several acknowledgments at the end of the book.

In British English, you can write the same sentences with acknowledgement and acknowledgements.

The spelling changes, but the underlying word does not.

Acknowledgment

Acknowledgment is the standard American English spelling.

It removes the e that appears before the suffix -ment in the longer form. This spelling frequently appears in American books, academic writing, business documents, and formal correspondence.

For example:

The author expressed her acknowledgment of everyone who contributed to the project.

American English also uses acknowledgments as the plural form.

Acknowledgement

Acknowledgement is the traditional spelling commonly associated with British English.

The extra e remains before -ment, producing the longer form:

acknowledge + ment → acknowledgement

British publications, institutions, and writers may therefore use acknowledgement and acknowledgements.

Cambridge specifically identifies acknowledgement as a UK noun and gives acknowledgment as an alternative spelling.

Are Both Spellings Correct?

Yes.

Neither spelling is simply a misspelling of the other. Acknowledgment and acknowledgement are established English forms.

The important question is which variety of English you’re using.

Think of it as a regional spelling switch. American English tends to favor the shorter acknowledgment, while British English commonly retains the e in acknowledgement.

Why Are There Two Spellings of Acknowledgment?

The two forms exist because English spelling developed differently across regions.

American English often favors shorter spellings in certain words. British English sometimes preserves letters that American usage has dropped. This pattern appears in several groups of words, although the exact spelling differences vary from word to word.

For acknowledgment, the difference is especially easy to spot:

• American English: acknowledgment
• British English: acknowledgement

The pronunciation remains essentially the same. The extra e changes the written form rather than creating a different word.

The American English Spelling

American English generally prefers acknowledgment.

This version fits the spelling pattern used by many American writers who omit the extra e before -ment in this word.

If you’re writing an American English article, school paper, business report, or website, acknowledgment is the better default.

For example:

• Correct for US English: Thank you for your acknowledgment of the issue.
• Correct but less typical for US English: Thank you for your acknowledgement of the issue.

The first version aligns more closely with standard American usage.

The British English Spelling

British English commonly uses acknowledgement.

The additional e is not an error. It reflects a spelling convention that remains well established in British writing.

For example:

• The committee issued an acknowledgement of the contribution.
• Her acknowledgement of the problem came during the meeting.
• The book contains a page of acknowledgements.

Cambridge’s British English entry lists acknowledgement as a noun and defines it as a letter or email confirming receipt of something.

Acknowledgment or Acknowledgement in American English

If your audience primarily uses American English, use acknowledgment.

That recommendation matters most when you’re writing professionally or academically. Consistency gives your writing a polished appearance and prevents regional spellings from appearing randomly throughout the same document.

For example, an American English report might say:

• The researchers included an acknowledgment of the funding agency.
• We received an acknowledgment of the application.
• The author added an acknowledgment to the final chapter.

American English also uses acknowledgments when referring to more than one acknowledgment.

Which Spelling Should You Use in the US?

Use acknowledgment when you’re following US English.

This is particularly useful for:

• American school assignments
• US business documents
• American websites
• US academic writing
• Job applications
• Professional reports
• American publishing

If a specific publisher, university, company, or style guide gives you a different requirement, follow that requirement. A house style can override a general regional preference.

Examples of Acknowledgment in American English

Here are several natural examples:

1. The author included an acknowledgment of the research team’s support.
2. We received an acknowledgment confirming that the application had arrived.
3. Her acknowledgment of the mistake helped resolve the dispute.
4. The book’s acknowledgments thank everyone who contributed to the project.
5. The company sent an acknowledgment after receiving the complaint.

Notice that the word can describe several kinds of recognition. It isn’t limited to a thank-you section in a book.

Acknowledgment or Acknowledgement in British English

British English commonly favors acknowledgement.

The meaning stays the same, so the choice is primarily regional. If you’re writing for readers in the UK, using acknowledgement can make your spelling align more naturally with British conventions.

For example:

• The report included an acknowledgement of the volunteers.
• She received an acknowledgement confirming receipt of her application.
• The author wrote several acknowledgements at the end of the book.

Cambridge lists acknowledgement as the UK form and also recognizes acknowledgment as an alternative.

Which Spelling Is Preferred in the UK?

For traditional British English writing, acknowledgement is a strong choice.

However, you may still encounter acknowledgment in British publications, international organizations, technical documents, and texts influenced by American English.

That means you shouldn’t automatically label the shorter spelling wrong when you see it in a British context.

Examples of Acknowledgement in British English

Consider these examples:

• The researcher included an acknowledgement of the participants’ assistance.
• We sent an acknowledgement after receiving the documents.
• The report contains an acknowledgement of the funding provided.
• The author wrote a short acknowledgement to her colleagues.
• The committee issued an acknowledgement of the contribution.

The spelling with -gement plus the additional e remains perfectly valid.

Acknowledgment vs. Acknowledgement in Other English-Speaking Countries

English doesn’t stop at the US and UK border.

Other English-speaking regions can use either spelling depending on local conventions, institutional preferences, and the influence of British or American English.

Canada

Canadian English can show both British and American spelling influences. As a result, you may encounter acknowledgment and acknowledgement.

When writing for a Canadian institution, the safest approach is to follow its established style guide or editorial policy rather than assuming one spelling will fit every context.

Australia and New Zealand

Australian and New Zealand English generally retain many British spelling conventions. Therefore, acknowledgement can be a natural choice in these varieties.

Still, individual organizations may adopt their own editorial standards. Consistency matters more than trying to force every English-speaking country into one spelling box.

International and Academic English

International academic writing can contain both forms.

Researchers may follow the style guide of a journal, university, publisher, or professional organization. Some institutions use American English, while others use British English.

The practical rule is simple: identify the required English variety before you start writing.

That one step can prevent dozens of small spelling inconsistencies later.

What Does Acknowledgment Mean?

Spelling aside, what does acknowledgment actually mean?

The noun has several related meanings. At its core, it involves recognition, acceptance, appreciation, or confirmation.

Cambridge defines acknowledgment as accepting that something is true or right. It also uses the word for something given to thank someone and for a letter or email confirming receipt.

Acknowledgment as Recognition or Appreciation

You can use acknowledgment when you recognize someone’s contribution.

For example:

The project included an acknowledgment of the volunteers’ work.

Here, the word means recognition or appreciation.

This meaning often appears in books, research papers, reports, speeches, and formal statements.

Acknowledgment as Confirmation

The word can also describe confirmation that something has been received.

For example:

We received an acknowledgment of the application.

In this context, the acknowledgment doesn’t necessarily express gratitude. Instead, it confirms that someone received the application.

Cambridge gives this sense for letters and emails that tell someone an item has been received.

Acknowledgment in Academic and Formal Writing

Academic writers often use acknowledgment for recognition of assistance, funding, research support, or other contributions.

A book might contain an Acknowledgments section where the author thanks editors, researchers, colleagues, institutions, family members, or other contributors.

Cambridge specifically describes acknowledgments as a short text in a book where the writer names people or works that helped with the writing.

How to Use Acknowledgment Correctly

The word becomes easier to understand when you look at the job it performs in a sentence.

Acknowledgment of Help or Support

Use acknowledgment when you want to recognize assistance.

Example:

The report included an acknowledgment of the team’s technical support.

Here, the writer recognizes the team’s contribution.

Acknowledgment of a Fact or Problem

You can also use the noun when someone recognizes a fact, situation, or problem.

Example:

Her acknowledgment of the error helped restore trust.

The meaning isn’t simply “thank you.” It means recognizing that something is true.

The related verb acknowledge carries the same core idea. Cambridge defines it as accepting, admitting, or recognizing something or its truth or existence.

Acknowledgment in Academic Papers and Books

An academic paper may include acknowledgments for research assistance, funding, technical support, or other contributions.

For example:

Acknowledgments: The researchers thank the laboratory staff for their assistance with data collection.

A book may have a longer Acknowledgments section.

In either case, American English generally uses acknowledgments, while British English commonly uses acknowledgements.

Acknowledgment in Professional Communication

Businesses also use the word when confirming receipt.

For example:

Please send an acknowledgment once you receive the documents.

This usage is formal and practical. It tells the recipient to confirm that the material arrived.

The related phrase acknowledge receipt is also common in professional communication. Cambridge gives acknowledge receipt of as a business expression meaning to let someone know that something they sent has been received.

Acknowledgment Examples

Seeing the two spellings side by side makes the distinction straightforward.

Example Sentences With Acknowledgment

• The editor added an acknowledgment of the research team’s contribution.
• We received an acknowledgment of the application.
• His statement was an acknowledgment that the plan had failed.
• The author included several acknowledgments at the end of the book.
• The company sent an acknowledgment after receiving the complaint.
• Her acknowledgment of the problem surprised the committee.

Example Sentences With Acknowledgement

• The editor added an acknowledgement of the research team’s contribution.
• We received an acknowledgement of the application.
• His statement was an acknowledgement that the plan had failed.
• The author included several acknowledgements at the end of the book.
• The company sent an acknowledgement after receiving the complaint.
• Her acknowledgement of the problem surprised the committee.

The meanings remain unchanged. Only the regional spelling differs.

Formal vs. Everyday Examples

The word appears in several types of writing.

Context	Example
Academic	The paper contains an acknowledgment of the research assistants.
Business	We sent an acknowledgment confirming receipt of your application.
Books	The author included several acknowledgments.
Formal writing	Her statement was an acknowledgment of the problem.
General writing	He gave an acknowledgment of their help.

Acknowledgment as a Noun

Acknowledgment is a noun. It comes from the verb acknowledge.

The related forms are:

• acknowledge = verb
• acknowledged = past tense or past participle
• acknowledging = present participle
• acknowledgment = noun
• acknowledgements = British English plural
• acknowledgments = American English plural

Cambridge lists acknowledge as a verb meaning to accept, admit, or recognize something, as well as to confirm receipt of something.

Singular Form

Use acknowledgment or acknowledgement when discussing one instance.

American English:

The publisher sent an acknowledgment of receipt.

British English:

The publisher sent an acknowledgement of receipt.

Plural Form: Acknowledgments and Acknowledgements

Add -s to form the plural.

American English:

acknowledgment → acknowledgments

British English:

acknowledgement → acknowledgements

For example:

The book’s acknowledgments thank everyone who contributed.

Or:

The book’s acknowledgements thank everyone who contributed.

Cambridge recognizes both plural forms.

Common Mistakes 

The spelling itself causes most of the confusion, but several other mistakes appear frequently.

Using the British Spelling in US English

Using acknowledgement in American English isn’t necessarily wrong. However, it may look inconsistent if the rest of your document follows US spelling.

For a US audience, choose:

acknowledgment

Then keep that form throughout the document.

Assuming Acknowledgement Is Incorrect

This mistake goes in the opposite direction.

Some writers see the extra e and assume acknowledgement is misspelled. It isn’t.

British English uses acknowledgement widely, and major dictionaries recognize it. Cambridge explicitly lists acknowledgement as a UK form.

Confusing Acknowledgment With Acknowledging

These words belong to the same family, but they perform different grammatical jobs.

Acknowledgment is a noun:

Her acknowledgment of the issue was important.

Acknowledging is a verb form:

Acknowledging the issue was the first step.

Don’t swap them simply because their meanings are related.

Incorrect Plural Forms

Don’t create unusual plural forms such as acknowledgmentes.

The standard plurals are:

• acknowledgments
• acknowledgements

The only difference is the same regional e found in the singular forms.

Comparison Table

Feature	Acknowledgment	Acknowledgement
Part of speech	Noun	Noun
Meaning	Recognition, appreciation, or confirmation	Recognition, appreciation, or confirmation
American English	Preferred	Used, but less typical
British English	Accepted	Commonly preferred
Singular	Acknowledgment	Acknowledgement
Plural	Acknowledgments	Acknowledgements
Pronunciation	Essentially the same	Essentially the same
Correct spelling	✅ Yes	✅ Yes

The key point is simple: you aren’t choosing between a correct word and an incorrect word. You’re choosing between two established regional spellings.

Which One Should You Use?

The answer depends on your audience.

1.If you’re writing in American English, choose acknowledgment.

2.If you’re writing in British English, acknowledgement is a natural choice.

3.If you’re writing for an organization, journal, university, or publisher, check its style requirements first. Consistency can matter more than regional preference when a specific house style applies.

Use Acknowledgment in US English

For American English, the recommended default is:

acknowledgment

This is especially useful when you’re writing:

• US-focused web content
• School assignments
• Business reports
• American academic papers
• Professional emails
• Books intended for US readers

Use Acknowledgement in British English

For British English, use:

acknowledgement

This spelling fits traditional British conventions and appears in British dictionaries and writing.

The same applies to the plural:

acknowledgements

Follow Your Publication or Style Guide

A style guide can settle the question immediately.

Suppose you’re writing a paper for a university that requires British English. Even if you’re accustomed to American spelling, use the institution’s preferred form.

Likewise, an American publisher may require acknowledgment throughout a manuscript.

The golden rule for professional writing is consistency. Pick the required variety and stick with it.

Related Words and Forms

Understanding the word family can make spelling easier.

Acknowledge

Acknowledge is the verb.

It can mean to recognize something, accept that something is true, or confirm receipt of something.

Example:

The manager acknowledged the team’s concerns.

Acknowledging

Acknowledging is the present participle of acknowledge.

Example:

Acknowledging the problem allowed the team to address it.

Cambridge identifies acknowledging as the present participle of acknowledge.

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Acknowledged

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Acknowledged is the past tense and past participle.

Example:

The company acknowledged the error.

Acknowledgments / Acknowledgements

These are the plural forms of the noun.

Use acknowledgments in American English.

Use acknowledgements in British English.

Read More: Forest or Forrest: Which Spelling Is Correct?

FAQs

1. Is “acknowledgement” or “acknowledgment” correct?

Both spellings are correct. Acknowledgement is more common in British English, while acknowledgment is preferred in American English.

2. Why does “acknowledgment” have no “e”?

American English commonly removes the e from this word. This spelling developed as part of broader differences between American and British English conventions.

3. Should I use “acknowledgement” in a British English document?

Yes. Acknowledgement is the usual British English spelling, so it can fit naturally in academic, professional, and formal British writing.

4. Which spelling should I use in American academic writing?

Use acknowledgment in American academic writing when your institution or chosen style guide follows US English conventions. Consistency matters throughout the document.

5. Do “acknowledgement” and “acknowledgment” have different meanings?

No. They have the same meaning. The difference is mainly regional spelling, rather than a difference in definition or usage.

6. Is “acknowledgements” the plural of “acknowledgment”?

Yes. Acknowledgements is the British English plural, while acknowledgments is the American English plural.

7. Which spelling belongs in a thesis acknowledgment section?

Follow the English variety required by your university or thesis guidelines. British institutions may use acknowledgement, while American institutions often use acknowledgment.

8. Can I use both spellings in the same document?

It’s better to choose one spelling and use it consistently. Mixing British and American forms can make formal writing look inconsistent.

9. Why do websites show both spellings?

Websites contain content written for different regions. Some follow British English, while others follow American English, so both forms naturally appear online.

10. How can I remember the correct spelling?

Think about your audience and writing standard first. If you follow British English, choose acknowledgement. If you follow American English, choose acknowledgment.

Conclusion: 

The choice between acknowledgement and acknowledgment mainly depends on the type of English you’re using. Acknowledgement follows the common British English spelling, while acknowledgment is the standard American English form. Neither spelling changes the meaning, so the extra e simply reflects a regional difference.

When writing a thesis, report, book, or professional document, check your university or organization’s preferred English standard. Style guides can also help you settle the spelling before you begin. Once you choose a form, use it consistently throughout your work.

A simple spelling check can save you from unnecessary confusion. Think about your audience, identify whether you’re following British or American conventions, and then stick with that choice. With this approach, you can use acknowledgement or acknowledgment confidently and keep your writing polished.