Quick answer
No. You have a lot of freedom, but a UK business name cannot be offensive, cannot use sensitive words such as “Royal” or “Council” without permission, and cannot clash with someone else’s trade mark or registered company. Sole traders also cannot add “Ltd” or “plc”. Check those three things before you pay for a logo or signage.
The short version, by business type
| Rule | Sole trader or partnership | Limited company |
|---|---|---|
| Must not be offensive | Yes | Yes |
| Sensitive words need approval | Yes | Yes |
| Cannot use “Ltd”, “limited”, “LLP” or “plc” | Yes, they are banned | Must end in “Limited” or “Ltd” |
| Cannot be the same as a registered company | Not checked, but a clash is still risky | Yes, Companies House will refuse it |
| Should not copy a trade mark | Yes | Yes |
| Your own name on paperwork | Yes, alongside any trading name | Company name and number |
What sole traders can and cannot call themselves
As a sole trader you can trade under your own name, such as “Dan Hughes Plumbing”, or under a made-up name. GOV.UK’s rules on choosing a sole trader business name say it must not include “limited”, “Ltd”, “limited liability partnership”, “LLP”, “public limited company” or “plc”, must not be offensive, and should not be too similar to a trade mark someone else owns. You must also put your own name alongside the business name on official paperwork such as invoices and letters.
There is no central register of sole trader names, so nobody stops you choosing a name already used down the road. That is not the same as being allowed to use it. If the other business has a trade mark, or has built a reputation under the name in your area, you can be forced to change it.
Extra rules for limited companies
A limited company name is checked when you register. GOV.UK’s guidance on choosing a company name says it cannot be the same as another registered company, and that a name too similar to an existing company or trade mark can be challenged after registration. Small differences do not get you round this: GOV.UK’s own example is that “Hands UK Ltd” and “Hand’s Ltd” count as the same as “Hands Ltd”. You can check what is taken with the Companies House name availability tool before you apply.
Sensitive words: the ones that need permission
Some words suggest a status or official connection the public might rely on. Using them in a company or business name needs prior approval, sometimes from a specific body as well as Companies House. The government’s list of sensitive words and expressions includes words implying national or royal status, a connection with government or a local authority, or a regulated profession. If your name idea contains “British”, “Royal”, “Authority”, “Chartered” or similar, read the list first.
The rule that catches most people: trade marks
Passing the Companies House check does not mean the name is safe. Companies House checks company names, not trade marks. A registered trade mark gives its owner the right to stop others using a confusingly similar name for similar goods or services, and even an unregistered name with an established reputation can be protected through a claim called passing off.
Before committing, search the UK register using GOV.UK’s trade mark search, then search Google, Companies House and the social platforms for businesses in your trade using the same or a similar name. Our business name checker helps you run those checks in one place. If you later receive a complaint, our guide to trade mark objections explains your options.
A worked example
A decorator in Leeds wants to trade as “Royal Finish Decorating”. The word “Royal” is on the sensitive list, so the name would need approval, which is unlikely to be granted for a decorating firm with no royal connection. He tries “Fine Finish Decorating”, but a quick search finds a firm twenty miles away trading under that name with a busy website and years of reviews. Even with no trade mark involved, that reputation could support a passing off claim, and customers would mix the two up anyway. He settles on “Fine Line Decorating Leeds”, checks the trade mark register and Companies House, finds no close matches in his trade, secures the domain and the social handles, and only then orders the van livery.
Do the checks before the branding
Renaming after you have printed cards, wrapped a van and built a website is expensive. The order that saves money is: shortlist names, run the legal checks, secure the domain and handles, and then commission the logo. Our guides to business name ideas and choosing a domain cover the first steps. When the name is settled, our logo design is £129 and a full brand identity is £299, with every price listed on our pricing page.
One caution: none of this is legal advice. For a name you plan to invest heavily in, a short consultation with a trade mark attorney costs far less than a forced rebrand.
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Frequently asked questions
Do sole traders have to register their business name? +
No. There is no register for sole trader names, so you can start trading under a name without registering it anywhere. That also means nobody checks it for you. Search the trade mark register, Companies House and Google yourself, because an existing business with a trade mark or reputation could still make you stop using it.
Can I use a name if a limited company already has it? +
If you are forming a company, Companies House will refuse an identical name. As a sole trader you are not blocked, but using the same name as an established company in a similar trade risks a passing off claim or a trade mark complaint. Choose something clearly different to avoid paying for a rebrand later.
Does registering a company name protect it as a brand? +
Only partly. It stops another company registering the same name, but it does not stop sole traders or businesses in other forms trading under it, and it gives you no rights across your logo. A registered trade mark is the stronger protection for a name you plan to build a brand around.
