Ltd vs Limited: Is There a Difference in UK Law?

"Ltd" is the abbreviation of "Limited", and UK law accepts either one at the end of a private company's name.

Your company registered only one of them, though, and that one is its name.

The short answer

What the law actually says

The rule is one sentence in the Companies Act 2006, section 59(1): the name of a limited company that is a private company must end with "limited" or "ltd.".

It applies to companies limited by shares and to companies limited by guarantee alike. Public companies and community interest companies have their own endings.

The naming regulations add that "Ltd" counts with or without full stops. "Ltd." and "Ltd" are the same ending.

Which form is on the register

A company exists "by the name stated in the certificate of incorporation" (section 16). That certificate shows one ending, the one typed on the application.

The company's page on the Companies House register shows the same form, free of charge. The register displays names in capitals, which changes nothing: capitals and lower case are one name.

One rule shows how close the two endings are. When Companies House checks whether a new name is "the same as" an existing one, it ignores the ending altogether.

• "Northgate Trading Ltd" exists
• "Northgate Trading Limited" cannot be registered by an unrelated company
• Neither can "Northgate Trading PLC" or "Northgate Trading LLP"

So the registrar treats the endings as equivalent when protecting a name. It still records only one of them as yours.

Are Ltd and Limited interchangeable in daily use?

Published guides disagree here. Some formation agents say you may alternate freely once the company exists, others say the registered form is required word for word. The texts support the stricter reading on documents, for a specific reason.

• Section 82(3) lets the government make rules that disregard the gap between a word and its permitted abbreviation.
• The 2015 regulations, which contain the disclosure rules, do not include such a rule. They require the "registered name".
• Section 85 forgives three things only: upper or lower case, punctuation, and format or style.

Read together: "ACME LTD", "Acme Ltd" and "Acme Ltd." are safely the same name. "Acme Limited" for a company registered as "Acme Ltd" is not covered by any written tolerance.

Same name in law

ACME LTDalso Acme Ltd, Acme Ltd.

Differences the Act tells you to ignore.

• Upper or lower case
• Punctuation, including the full stop
• Format or style

No written tolerance

Acme Limitedthe other permitted ending

The word in place of its abbreviation.

• The power to disregard the gap exists, in section 82(3)
• The 2015 regulations do not use it
• They require the "registered name"

Ireland and Singapore wrote the swap into their company law. The UK has not.

No UK rule says the two forms may be swapped on business documents. Ireland and Singapore wrote that rule into their company law; the UK gave itself the power to, and has not used it.

Limited or Ltd on invoices, contracts and bank accounts

A UK company must disclose its registered name on a defined list of documents (regulation 24 of the 2015 regulations):

• Business letters, notices and official publications
• Order forms
• Invoices, receipts and other demands for payment
• Cheques and bills of exchange signed for the company
• Applications for licences
• All other business correspondence and documentation
• Its websites

GOV.UK is blunter about invoices: a limited company "must include the full company name as it appears on the certificate of incorporation".

On contracts, the other side will sometimes type the wrong suffix for you:

1. Correct the name to the registered form before signing
2. Add the company number next to it
3. Keep the same wording in every schedule and signature block

On bank accounts, give payers the name exactly as the bank holds it. Payee name checks compare what the payer types with the account name, and a different suffix is a needless reason for a query.

What a mismatch actually costs

Less than forums suggest, and more than nothing.

What does not happen:

• The company does not become a different company
• Limited liability does not disappear. It comes from the company's constitution (section 3), not from the suffix on a letterhead

What the regulations provide for a real failure to disclose the registered name:

• An offence by the company and by every officer in default, where there is no reasonable excuse (regulation 28)
• A fine up to level 3 on the standard scale, which is £1,000
• A daily default fine of up to one tenth of that for a continued breach

There is also a civil consequence (section 83). If the company sues on a contract made while it was in breach, the court must dismiss the claim where the defendant shows one of two things:

• They had a claim under the contract they could not pursue because of the breach
• They suffered financial loss because of the breach

The court can still let the claim continue if that is just and equitable. In short, the risk grows when the wrong name left someone unsure who they were dealing with.

Welsh endings, and companies with no "Limited" at all

Welsh companies. A "Welsh company" is one whose registered office is stated on the register as being in Wales (section 88). It may end its name with "cyfyngedig" or "cyf." instead (section 59(2)).

• The choice is optional. A Welsh company can still use "Limited" or "Ltd"
• A company that is not a Welsh company cannot use the Welsh forms

Companies exempt from "Limited". Some private companies drop the word entirely (section 60):

• Charities
• Companies limited by guarantee whose objects are the promotion or regulation of commerce, art, science, education, religion, charity or a profession, and whose articles bar any distribution to members
• Older companies holding an exemption that predates the current Act

An exempt company is still limited. It must say so on its business letters, order forms and websites (regulation 25).

Changing from Ltd to Limited, or back

It is possible, and it is a formal change of name, not a correction.

1. Pass a special resolution, or use another method your articles allow (section 77)
2. File the notice of change of name, form NM01, with Companies House
3. Pay the fee
4. Receive a new certificate of incorporation (section 80)

Fees are from the Companies House schedule in force since 1 February 2026.

What follows from the change:

• It takes effect on the date the new certificate is issued (section 81)
• The company's rights, obligations and company number are untouched
• Every invoice template, contract template, bank mandate and website footer needs updating

That last line is why the change is rarely worth it. Aligning your documents with the register costs nothing. If you have not formed the company yet, the ending is one field in a longer application, and setting up a UK company from abroad covers the rest.

Ltd, PLC, LLP, Inc, LLC and Corp: the same idea in other countries

Every country has its own statutory ending. This table only translates the label; it does not compare the structures.

Two readings that surprise people:

• "Ltd" does not prove a UK company. Delaware lets a corporation's name contain "limited" or its abbreviation, alongside "incorporated", "corporation" and "company".
• "Inc." and "Corp." are not different entity types. Delaware lists them as alternative words for the same corporation.

When the ending tells you too little, look for the registration number and the registry behind it. The UK Act itself uses "corporation" to include bodies incorporated abroad (section 1173).

Is a corporation a limited company?

Usually yes, but the two words answer different questions.

	A corporation?	Liability limited?
UK limited company (Ltd)	Yes, a body corporate	Yes
UK public company (PLC)	Yes	Yes, without the "Ltd" ending
US corporation (Inc., Corp.)	Yes	Yes, though not a "limited company" under the UK Act
UK unlimited company	Yes, a body corporate	No cap on members' liability
US LLC	No, formed under a separate statute	Yes

Applied to the common cases:

• A UK limited company is a corporation. On registration its members become "a body corporate" (section 16)
• A US corporation is the equivalent of a UK company limited by shares. It is not a "limited company" under the UK Act, which covers companies registered under that Act (section 1)
• A UK unlimited company is a corporation and is not limited. It is a body corporate with no cap on members' liability (section 3)
• A US LLC is limited but is not a corporation. Delaware forms it under a separate statute
• A PLC is a limited company too. It simply cannot use the "Ltd" ending

The summary