Trading Name vs Company Name: What's the Difference?

Your company name is the legal name registered with Companies House. Your trading name is whatever you actually operate under day to day, and it can be completely different. Here's what each one actually protects, and where people usually get caught out.

Key Takeaways

• A company name is your legal, registered identity. A trading name is just the name you do business under, and the two don't have to match.
• Only your registered company name carries legal protection. A trading name on its own doesn't stop someone else from using it.
• The Companies Act 2006 requires your full company name and registration details on official documents, but your trading name is fine for everyday branding.
• Certain words, like "British," "Group," or professional titles, are restricted and need approval before you can register them.
• Check both names properly before you commit, so you don't end up rebuilding a brand around a name you can't legally keep.

What Is a Company Name?

Your company name is the legal name your business is registered under at Companies House. If you register as "John Smith Ltd," that's your official name, tied to a unique company number.

Once registered, no other business can register the same or a confusingly similar name. That's the actual legal protection you're getting, and it's a big part of why registering matters beyond just formality. Your company number stays the same for the life of the business, so it's worth including on paperwork alongside your name.

The Companies Act 2006 requires your full company name to appear on official business documents and stationery, including:

• Letterheads and compliments slips
• Invoices and receipts
• Order forms, hard copy or electronic
• Emails
• Your website

Order forms and your website also need to show your place of registration, your company registration number, and your registered office address. Your social media handles and everyday client conversations, though, can just use your trading name.

What Is a Trading Name?

A trading name is whatever name your business actually operates under, and it can be different from your registered company name entirely. "John Smith Ltd" might trade as "Smith's Shop," and that's completely normal.

This is useful if you want a distinct brand identity, or if you're running more than one business line under a single registered company. The catch is that a trading name isn't a legal entity on its own. It doesn't carry any legal protection by itself. Your registered company name is what actually protects you.

What Happens if Someone Else Registers Your Trading Name?

If another business registers your trading name as their company name, you may have grounds to challenge it, particularly if you can show you were using the name first. This is a genuinely frustrating situation, and it's more common than people expect.

You may also have a claim under "passing off," which applies when someone else uses a name in a way that could deceive your customers into thinking they're dealing with you. Whether either route succeeds depends on your specific circumstances, so it's worth getting legal advice quickly rather than waiting.

Which Names Need Special Approval?

Certain words are treated as "sensitive" by Companies House and need approval before you can use them in a company name. These include:

• Words suggesting national or governmental status, like "British" or "International"
• Structural words like "Group," which need a genuine parent or subsidiary relationship to use
• Terms tied to regulated professions, such as "Doctor" or "Architect," unless you hold the relevant qualification

Our guide on what you can call your company goes through the naming process step by step, including how to check availability and spot a reserved word before you get attached to a name.

How to Choose the Right Names for Your Business

Pick your trading name for how it sounds and what it says about your brand. Pick your company name for whether it's actually available and legally sound, since that's the one carrying real protection.

Check both names properly before committing. A name that looks free can still clash with something already registered, especially with a different suffix attached, like "Services" or "Group." Our company name search tool lets you check availability before you build a brand around a name you might not be able to keep.

If you've already registered and want to change course later, our company name change service can help you update things properly with Companies House.

FAQs

Can my trading name be different from my company name?

Yes. Many businesses trade under a different name than the one registered with Companies House, and this is completely normal.

Does a trading name give me legal protection?

No, not on its own. Only your registered company name is protected from being used by another business. A trading name alone doesn't stop someone else from using it.

Do I have to display my full company name everywhere?

On official documents like invoices, letterheads, and your website, yes, along with your registration number and registered office address. Day-to-day branding and social media can use your trading name instead.

What happens if someone else takes my trading name as their company name?

You may be able to challenge it, particularly if you were using the name first, and you might have a case under "passing off" if it risks confusing your customers. Get advice quickly, since these situations are time-sensitive.

Can I use the word "British" or "Group" in my company name?

Only with approval from Companies House, since these are treated as sensitive words. The same applies to titles tied to regulated professions, like "Doctor," unless you hold the qualification.

How do I check if a company or trading name is already taken?

Use a company name search tool before you register or start trading under a name. Checking both the exact name and close variations helps you avoid a clash you didn't expect.

This article is for general information only and does not constitute legal advice. Naming rules, disputes over trading names, and passing-off claims depend heavily on individual circumstances, so it's worth checking current guidance on GOV.UK or speaking to a qualified professional before making decisions.