Fulfil or Fulfill: British and American English

If you have ever hesitated over fulfil or fulfill, you are not dealing with two words that have different meanings. Both spellings are correct. The main difference is regional: fulfil is the standard spelling in British English, while fulfill is the standard spelling in American English. The same distinction appears in the noun forms fulfilment and fulfillment. However, forms such as fulfilling and fulfilled are spelled the same in both varieties. So, which version should you use? The answer depends mainly on your audience and which variety of English you are following.

Fulfil vs. Fulfill: What’s the Difference?

The difference is primarily one of regional spelling, not meaning.

Feature	Fulfil	Fulfill
Standard variety	British English	American English
Meaning	To achieve, satisfy, complete, or carry out	To achieve, satisfy, complete, or carry out
Part of speech	Verb	Verb
Example	She hopes to fulfil her ambition.	She hopes to fulfill her ambition.
Correct?	Yes	Yes

Both verbs can describe achieving an ambition, satisfying a requirement, keeping a promise, carrying out a duty, or completing an order.

For example:

• British: The company must fulfil its obligations.
• American: The company must fulfill its obligations.

The meaning does not change.

What Does “Fulfil” Mean?

Fulfil is the usual British English spelling of the verb. It can mean to accomplish something that was expected or desired, satisfy a condition, carry out an obligation, or complete a particular purpose.

Examples:

• She worked hard to fulfil her ambition.
• You must fulfil all the requirements before applying.
• He promised to fulfil his responsibilities.
• The business aims to fulfil every customer order.

The word can also refer to personal satisfaction:

Volunteering gives her a strong sense of fulfilment.

If you are writing primarily for readers who use British English, fulfil is the appropriate spelling.

What Does “Fulfill” Mean?

Fulfill is the standard American English spelling. It has the same meanings as fulfil.

Examples:

• She worked hard to fulfill her ambition.
• You must fulfill all the requirements before applying.
• He promised to fulfill his responsibilities.
• The business aims to fulfill every customer order.

American English commonly uses the double l in the base form.

The important point is that fulfill is not a different word with a different definition. It is the American spelling of the same verb.

When Should You Use Each Spelling?

Choose the form according to your intended variety of English.

Use “fulfil” in British English

Use fulfil when following British spelling conventions.

For example:

The candidate must fulfil the necessary conditions.

She hopes to fulfil her potential.

The retailer will fulfil the order within five working days.

This spelling is also appropriate when maintaining British conventions throughout a document.

Use “fulfill” in American English

Use fulfill when writing according to American spelling conventions.

For example:

The candidate must fulfill the necessary conditions.

She hopes to fulfill her potential.

The retailer will fulfill the order within five business days.

The key is consistency. If the rest of your writing follows American spelling, fulfill will normally fit better. If it follows British spelling, choose fulfil.

Fulfilment or Fulfillment?

The noun follows the same regional spelling pattern.

Fulfilment is the British English spelling, while fulfillment is the American English spelling.

British English	American English
fulfil	fulfill
fulfilment	fulfillment
fulfils	fulfills
fulfilled	fulfilled
fulfilling	fulfilling

Examples:

British:

The fulfilment of his ambition took years.

American:

The fulfillment of his ambition took years.

Both versions can describe the achievement of something desired, the satisfaction of an obligation, or a feeling of satisfaction.

The distinction is particularly noticeable in business writing:

• order fulfilment — British English
• order fulfillment — American English

If your website or document uses British English, keep fulfilment throughout. For American English, use fulfillment.

Fulfilling or Fulfiling: Which Is Correct?

This is where the spelling becomes more important because fulfiling is not the standard form.

The correct spelling is:

fulfilling

It is used in both British and American English.

Examples:

• Teaching can be a fulfilling career.
• She found the experience extremely fulfilling.
• Helping others is personally fulfilling.
• He wanted work that was meaningful and fulfilling.

So the pattern is slightly different from the base verb:

British: fulfil → fulfilling
American: fulfill → fulfilling

Although the base forms differ, the -ing form is spelled fulfilling in both varieties.

Why is there a double “l”?

When the suffix -ing is added, the spelling produces fulfilling. The result contains two consecutive ls before -ing.

Therefore:

• Correct: fulfilling
• Incorrect: fulfiling

If you are unsure, remember that the standard form has two l’s before “ing.”

What About “Fulfilled”?

Interestingly, the past tense and past participle are also the same in British and American English:

fulfilled

Examples:

• British: She fulfilled her promise.
• American: She fulfilled her promise.

The same applies to expressions such as:

• fulfilled a duty
• fulfilled a requirement
• fulfilled an ambition
• fulfilled an obligation
• fulfilled an order

So you do not need to choose between fulfiled and fulfilled based on British or American English. Fulfilled is the standard spelling.

Common Expressions With These Words

The verb appears in several common expressions. The meaning stays the same regardless of the regional spelling.

Fulfil/Fulfill a promise

He worked hard to fulfil his promise.
He worked hard to fulfill his promise.

Fulfil/Fulfill a requirement

Applicants must fulfil the requirements.
Applicants must fulfill the requirements.

Fulfil/Fulfill an ambition

She finally fulfilled her ambition of becoming a writer.

Notice that fulfilled is identical in both varieties.

Fulfil/Fulfill an obligation

The company is legally required to fulfil its obligations.

The company is legally required to fulfill its obligations.

Fulfil/Fulfill an order

The warehouse will fulfil the order tomorrow.

The warehouse will fulfill the order tomorrow.

This last usage is especially common in retail and e-commerce.

Common Spelling Mistakes

Because the word contains several consecutive letters that can be easy to misremember, a few incorrect forms sometimes appear.

1. “Fulfiling”

Incorrect:

She found the work very fulfiling.

Correct:

She found the work very fulfilling.

2. “Fullfill”

Incorrect:

The company will fullfill the order.

Correct:

The company will fulfill the order.

3. “Fullfil”

Incorrect:

He hopes to fullfil his potential.

Correct British form:

He hopes to fulfil his potential.

Correct American form:

He hopes to fulfill his potential.

4. “Fulfiled”

Incorrect:

She fulfiled her promise.

Correct:

She fulfilled her promise.

5. “Fullfilled”

Incorrect:

They fullfilled the requirements.

Correct:

They fulfilled the requirements.

The safest approach is to remember the standard word family rather than trying to construct each form from scratch.

A Simple Way to Remember the Difference

For the base verb, think:

British English → fulfil
American English → fulfill

A useful visual shortcut is:

UK: one L after “fi” → fulfil
US: double L at the end → fulfill

But do not apply that shortcut to every form. The derived forms are shared:

fulfilled
fulfilling

For the noun:

fulfilment → British
fulfillment → American

The easiest rule is therefore to identify the English variety first and then keep your spelling consistent.

Is It “Fulfil or Fulfill” in Formal Writing?

Both are acceptable in formal writing when they match the appropriate regional variety.

For British English:

The organization must fulfil its statutory obligations.

For American English:

The organization must fulfill its statutory obligations.

Neither spelling is inherently more formal or more correct. The important consideration is consistency with the style of English being used.

For example, a document using British spellings such as colour, centre, and organisation would normally also use fulfil. A document using American spellings such as color, center, and organization would normally use fulfill.

Which Version Should You Choose?

Think about your readers and the style guide you are following.

If you are writing for a predominantly British-English audience, choose fulfil and fulfilment.

If you are writing for an American-English audience, choose fulfill and fulfillment.

If you are working on a formal publication, academic paper, website, or company document, consistency matters more than trying to mix the two systems.

For example, avoid switching between:

The company will fulfil the order and manage order fulfillment.

Instead, maintain one convention:

The company will fulfil the order and manage order fulfilment.

Or:

The company will fulfill the order and manage order fulfillment.

FAQs

Is “fulfil” or “fulfill” correct?

Both are correct. Fulfil is the standard British English spelling, while fulfill is the standard American English spelling. They have the same meaning and function as verbs.

Is “fulfil” British or American?

Fulfil is primarily the British English spelling. American English generally uses fulfill instead.

Is “fulfilment” or “fulfillment” correct?

Both are correct regional spellings. Fulfilment is used in British English, while fulfillment is used in American English.

Is “fulfiling” correct?

No. The standard spelling is fulfilling, with two consecutive ls before -ing. This spelling is used in both British and American English.

Is “fulfilled” different in British and American English?

No. Fulfilled is the standard spelling in both varieties. The regional difference mainly affects the base verb and noun: fulfil/fulfilment versus fulfill/fulfillment.

Should I use “fulfil” or “fulfill” in my writing?

Use fulfil if you are following British English and fulfill if you are following American English. If your publication has a style guide, follow its preferred variety and apply it consistently.

The Bottom Line

Fulfil and fulfill are both correct; the choice depends on regional English. British English generally uses fulfil and fulfilment, while American English uses fulfill and fulfillment. The related forms fulfilled and fulfilling are shared by both varieties, so fulfiling is not the standard spelling. For more clear, practical explanations of confusing English forms, Grammarifyr helps you know the difference and use the right words.

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