Instalments or Installments: Which Spelling Is Correct?

Have you ever wondered whether to write instalments or installments? Both spellings are correct, so this question can be confusing.

The main difference is British English vs American English. Instalments is the usual British spelling. Installments is the usual American spelling. The meaning stays the same.

The word usually means one of several payments made over time. For example, you may buy a phone and pay for it in monthly instalments or installments. It can also mean one part of a story, TV show, or series that appears over time.

People often search for instalments or installments when they are writing about loans, payments, shopping, bills, or a series of stories.

In this guide, you will learn which spelling to use in British and American English. You will also see the meaning, examples, common mistakes, word history, pronunciation, and simple rules that make the choice easy.

Instalments or Installments – Quick Answer

Both “instalments” and “installments” are correct.

The spelling depends mainly on the type of English you are using:

• Instalments = British English
• Installments = American English

The meaning is the same.

For example:

British English:

I paid for the car in monthly instalments.

American English:

I paid for the car in monthly installments.

Cambridge lists instalment as mainly UK and installment as the US spelling. Oxford also gives instalment as especially British and says North American English usually uses installment.

So, there is no spelling mistake when you choose either form. Just match the spelling to your audience.

What Does Instalment or Installment Mean?

An instalment or installment is one of several payments made over a period of time.

For example, imagine a laptop costs $1,200.

You may not pay the full $1,200 at once. Instead, you may pay $100 each month for 12 months.

Each $100 payment is an instalment in British English or an installment in American English.

The word has another meaning too.

An instalment or installment can be one part of a story, TV series, book, or other work that appears in parts.

For example:

The next installment of the series comes out next week.

Cambridge gives both the payment meaning and the meaning of one part of a series.

Instalments vs Installments: Main Difference

The main difference is spelling.

There is no important difference in meaning.

Term	English Variety	Meaning	Example
Instalments	British English	Regular payments or parts of a series	We paid in monthly instalments.
Installments	American English	Regular payments or parts of a series	We paid in monthly installments.

The extra l in installments is the main spelling difference.

Singular forms

The same rule applies to the singular:

• British English: instalment
• American English: installment

Plural forms

• British English: instalments
• American English: installments

What Is an Instalment?

Instalment is the British spelling.

It can describe:

1. One regular payment
2. One part of a story or series

Examples:

The first instalment is due next Monday.

I paid for the phone in six instalments.

This is the final instalment of the story.

Oxford defines instalment as one of a number of regular payments made until something has been paid for. It also uses the word for one part of a story or series.

What Is an Installment?

Installment is the American spelling.

It has the same meanings as instalment.

Examples:

The first installment is due next Monday.

I paid for the phone in six installments.

This is the final installment of the series.

Cambridge identifies installment as the US spelling of instalment.

Instalment or Installment for Payments

Both spellings work when talking about payments.

British English

We pay the loan in monthly instalments.

American English

We pay the loan in monthly installments.

You may see these words in:

• Loans
• Credit agreements
• Car payments
• Phone payments
• Online shopping
• School fees
• Insurance
• Bills
• Subscriptions
• Payment plans

The basic idea is always the same: you pay a total amount in smaller parts over time.

Instalment or Installment for Stories and Shows

The word does not only relate to money.

It can also mean one part of a series.

For example:

The next instalment of the story will appear tomorrow.

British writers may use instalment.

American writers may use:

The next installment of the story will appear tomorrow.

Oxford gives examples of stories and series being published in instalments.

So the spelling difference applies to both meanings.

Origin and History

The word has a long history in English.

Oxford dates instalment to the mid-18th century. It says the word came from an older form, estalment, and was likely changed through an association with installation. The older form came through Anglo-Norman French and Old French.

Over time, English developed the spelling instalment.

American English later developed the spelling installment, with the extra l.

Today, both spellings are established.

The difference is mainly regional rather than a difference in meaning.

British English vs American English

This is one of the clearest British and American spelling differences.

British English

Use:

instalment

Plural:

instalments

Example:

The loan will be paid in twelve monthly instalments.

American English

Use:

installment

Plural:

installments

Example:

The loan will be paid in twelve monthly installments.

Cambridge labels instalment as mainly UK and identifies installment as the US spelling.

Oxford gives the same basic distinction, describing instalment as especially British and installment as usual in North American English.

Pronunciation

The pronunciation is very similar.

The main difference is the spelling, not the basic sound.

Cambridge gives UK pronunciation as approximately:

/ɪnˈstɔːl.mənt/

and US pronunciation as approximately:

/ɪnˈstɑːl.mənt/.

Which One Should You Use?

Choose the spelling based on your audience.

For British English

Use:

instalment

Example:

Your next instalment is due on Friday.

For American English

Use:

installment

Example:

Your next installment is due on Friday.

For school writing

Follow the English style your school or teacher uses.

If your school follows British English, use instalment.

If it follows American English, use installment.

For academic writing

Use one spelling consistently.

Do not switch between instalment and installment in the same piece of writing unless you are quoting a source that uses the other form.

For business writing

Match the spelling to your company, client, or target country.

For websites

Think about your main audience.

A website aimed at the UK can use instalments.

A website aimed at the US can use installments.

For international writing

If your readers come from different countries, either form is understandable. The most important thing is to stay consistent.

Common Mistakes

Mistake 1: Thinking one spelling is always wrong

Wrong idea:

Installment is wrong.

Correct idea:

Both spellings are correct.

Use instalment in British English and installment in American English.

Mistake 2: Mixing British and American forms

Avoid writing:

We paid in monthly instalments and the final installment was due in June.

Choose one style.

Better British English:

We paid in monthly instalments, and the final instalment was due in June.

Better American English:

We paid in monthly installments, and the final installment was due in June.

Mistake 3: Using the wrong plural

British:

instalments

American:

installments

Do not mix the two forms in one style.

Mistake 4: Adding an apostrophe

Do not write:

instalment’s

when you mean more than one payment.

Use:

instalments

The apostrophe is not needed for a normal plural.

Mistake 5: Confusing instalment with payment

The words are related, but they are not always exact substitutes.

A payment can be any amount of money that you pay.

An instalment is usually one of a series of payments made over time.

For example:

I made a payment today.

This does not tell us whether there will be more payments.

But:

I paid the first instalment today.

This suggests a series of payments.

Mistake 6: Changing the spelling in the same article

If you start with British English, keep using instalment.

If you start with American English, keep using installment.

Consistency makes your writing look cleaner.

10 Everyday Examples

British English

1. The first instalment is due next week.
2. We paid for the car in monthly instalments.
3. She missed two instalments on her loan.
4. The final instalment was paid yesterday.
5. You can pay the fee in three instalments.

American English

6. The first installment is due next week.
7. We paid for the car in monthly installments.
8. He missed two installments on his loan.
9. The final installment was paid yesterday.
10. The next installment of the show will be released Friday.

These sentences show that the meaning stays the same. Only the spelling changes.

Real-Life Usage

In conversations

Someone may say:

How many installments do I have left?

A British speaker may say:

How many instalments do I have left?

In emails

A business may write:

Your next instalment is due on 1 October.

An American business may write:

Your next installment is due on October 1.

At school

A student might write:

The course fee can be paid in two instalments.

An American student may write:

The course fee can be paid in two installments.

At work

A company may write:

The final instalment will be paid after the work is complete.

On social media

You may see:

I finally paid off my last installment!

This is common in American English.

In formal writing

Both forms are correct when they match the style of English being used.

Related Search Questions

Is instalments British or American?

Instalments is the usual British English spelling. American English usually uses installments. The meaning is the same.

Is installments British or American?

Installments is the usual American English spelling. British English normally uses instalments.

Which is correct, instalment or installment?

Both are correct. Use instalment for British English and installment for American English.

What is the difference between instalment and installment?

There is no important difference in meaning. The main difference is regional spelling. British English normally uses instalment, while American English normally uses installment.

How do you use instalment in a sentence?

You can use it for one payment in a series:

I paid the first instalment today.

You can also use it for one part of a series:

The next instalment of the story will be published tomorrow.

How do you use installment in a sentence?

Use installment in American English in the same way:

I paid the first installment today.

Or:

The next installment of the series will be released soon.

Is instalment only used for money?

No. It can also describe one part of a story, book, TV show, or other series. Oxford and Cambridge both give this wider meaning.

Usage and Search Trends

There is no need to invent search volume or Google Trends numbers for this spelling question.

The useful usage pattern is clear from major dictionaries.

Instalment is mainly used in British English, while installment is the usual American form. Cambridge and Oxford both record this regional difference.

The word appears in two main areas:

• Money: monthly payments, loans, bills, and payment plans
• Media and stories: one part of a series or story

Searchers may type instalments or installments because they want to know whether the extra l changes the meaning. It does not.

The choice depends on the English style you are following.

Instalments vs Installments Comparison Table

Feature	Instalments	Installments
Main spelling	British	American
Singular	Instalment	Installment
Plural	Instalments	Installments
Meaning	Same	Same
Payment use	Yes	Yes
Story or series use	Yes	Yes
British English	Preferred	Less common
American English	Less common	Preferred
Pronunciation	Similar	Similar
Best for UK audience	Yes	No
Best for US audience	No	Yes

7 FAQs About Instalments or Installments

1. Is instalments the correct spelling?

Yes. Instalments is the standard plural spelling in British English. It refers to several payments made over time or several parts of a series. American English normally uses installments instead.

2. Is installments the correct spelling?

Yes. Installments is the standard American English spelling. It has the same meaning as British instalments. Both forms are correct when used in the right regional style.

3. Should I use instalment or installment in the UK?

Use instalment in British English. For example:

The final instalment is due next month.

This is the usual British spelling recorded by Oxford and Cambridge.

4. Should I use installment or instalment in the US?

Use installment in American English. For example:

The final installment is due next month.

Cambridge identifies installment as the US spelling of instalment.

5. Are instalment and installment pronounced differently?

They are pronounced very similarly. The main difference is the spelling. Cambridge gives slightly different UK and US pronunciation forms, but the words are easily understood as the same word.

6. Can installment mean part of a story?

Yes. Installment can mean one part of a story, TV series, book, or other work that appears in parts. British English normally spells this instalment.

7. Which spelling is better for SEO?

Neither spelling is universally better. Use the form that matches your target audience. For a UK audience, instalments is natural. For a US audience, installments is natural. If your website targets both markets, you can explain both forms naturally rather than forcing one spelling.

Conclusion

The difference between instalments and installments is easy to understand.

Both spellings are correct. The main difference is the type of English you use.

Instalments is the usual spelling in British English. Installments is the usual spelling in American English. The two words have the same meaning.

Both can describe a series of payments.

For example:

We paid for the car in monthly instalments.

A US writer would normally write:

We paid for the car in monthly installments.

The word can also describe one part of a story or series. This meaning works with both spellings too.

If you write for UK readers, choose instalment and instalments. If you write for US readers, choose installment and installments.

The most important rule is consistency. Do not switch between the two spellings without a reason.

So, when you ask “instalments or installments?”, the answer is:

Instalments for British English. Installments for American English. Both are correct.

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