Choosing a company name is part branding decision and part legal check. In the UK, a memorable idea must still satisfy Companies House rules. A few checks before registration can prevent rejection, rebranding, or later trademark trouble.
Start by creating a short, distinctive name that fits the business you plan to build. Search Companies House for exact and similar names, then check the UK trade mark register. Review sensitive-word rules and digital availability before spending on branding, then register the limited company through the official service.
| Key point | UK position |
|---|---|
| Availability | Search the Companies House register and official availability checker. |
| Legal ending | Private limited companies usually use “Limited” or “Ltd.” |
| Welsh option | Wales-registered companies may use “Cyfyngedig” or “Cyf.” |
| Trade marks | Search the UK Intellectual Property Office separately. |
| Sensitive terms | Some words need approval before registration. |
| Online incorporation | £100 through the official online service |
| Typical processing | Usually within 24 hours for online registration |
| Identity | You may need a Companies House personal code. |
| Brand checks | Check suitable domains and social handles before launch. |
Key Takeaways
Check legal availability before buying a domain, logo, signage, or printed materials. Companies House and UK trade mark searches answer different questions. Similarity risks matter even when an exact spelling looks free. Sensitive or protected terms can require approval before you apply.
Check suitable domains and social handles before committing to branding. Choose wording that can still fit if your products, locations, or customer groups expand.
What You’ll Need Before You Start
Prepare three to five shortlisted names before opening the official search tools. Keep your planned legal structure, main activity, and likely customer market beside you. You’ll compare each option against the same legal, brand, and digital checks.
Use the Companies House availability checker and the UK trade mark search. Note any sensitive word or regulated activity in your shortlist. Keep a suitable domain and social handle check ready, but complete legal checks first.
Company Name Rules You Must Meet in the UK
A private limited company’s registered name must usually end with “Limited” or “Ltd.” Wales-registered companies can use “Cyfyngedig” or “Cyf” instead. Your proposed name also cannot match another registered company.
Companies House applies the “same as” and “too like” tests when comparing proposed and existing names. Small punctuation changes or similar-looking words may not create enough distinction. A later complaint can also require a change.
Offensive names are not allowed, and some sensitive words need prior approval. Current rules also restrict names intended for fraud, false government connections, or computer code. Check the official sensitive-word guidance when a term suggests status, regulation, or public authority links.
How to Choose and Register a UK Business Name in Seven Steps
Treat naming as a sequence of checks rather than a burst of creativity. Each check removes a different legal or commercial risk. Working through them in order also reduces wasted branding costs.
- Confirm your business structure. Sole traders, partnerships, and limited companies follow different naming rules. Decide the structure before finalizing legal wording.
- Create a distinctive shortlist. Aim for three to five names that are easy to spell and say. Avoid wording that limits future products or locations unnecessarily.
- Search Companies House. Check exact names plus sensible spelling, spacing, and punctuation variations. Do not rely only on a standard web search.
- Search UK trademarks. Look for identical and similar marks in relevant goods or service classes. Registration at Companies House does not replace this check.
- Review sensitive words. Terms connected with government, regulated activities, status, or protected professions may need approval. Resolve permission questions before applying.
- Check digital usability. Look at suitable domains and social handles, then test how the name sounds aloud. A legal name can still be awkward commercially.
- Register through Companies House. GOV.UK sets the online incorporation fee at £100, paid through the official GOV.UK registration service. Submit the application once the legal and brand checks are clear. Keep the incorporation certificate with company records.
Availability is only one part of the decision. A name can pass Companies House checks yet still create trade mark risk. It can also be legally acceptable but confusing for customers.
Do not assume that adding “UK,” punctuation, or a plural automatically makes a name different. Companies House can disregard certain differences when applying the “same as” rules. Search close variations before committing money to a visual identity.
Companies House Registration Cost and Timing in 2026
At the time of writing, online incorporation through GOV.UK costs £100. The official service says it usually registers a company within 24 hours. Applicants may also need personal codes after completing Companies House identity verification.
The application covers more than the chosen name. You will also provide an official address, SIC code, director details, and ownership information. Your filing must also identify people with significant control where applicable.
Founders often spend too much time on branding before confirming the wider setup. Magzonia’s side-business guide explains a practical sequence for UK founders starting alongside employment. Set the structure first, then make the naming decision fit it.
Registered Name, Trading Name, and Trade Mark Are Different
Your registered name identifies the limited company on the Companies House register. A business can also trade under another business or trading name. That trading choice still has restrictions, including limits around protected and sensitive wording.
A trade mark serves a different purpose from company registration. When registered, it can protect a brand sign for specified goods or services and be enforceable. Companies House acceptance alone does not automatically give that protection.
Domain ownership is separate again. Buying a web address does not prove that your chosen branding is legally safe. Check the company register, trade marks, and digital availability as three different tasks.
Use This Ten-Minute Pre-Registration Test
A quick scorecard can expose weak choices before you pay for registration or design work. Run every shortlisted name through the same questions. Reject any option that fails a legal check, even if the branding feels strong.
| Check | Pass question. | Red flag |
|---|---|---|
| Legal | Is it clearly available on Companies House? | Exact, “same as,” or risky similarity |
| Trade mark | Are relevant UK searches clear? | Similar mark in a related class |
| Clarity | Can someone spell it after hearing it once? | Frequent explanation or correction |
| Digital | Is a suitable domain available? | Only confusing or misleading domains remain. |
| Growth | Can the name survive expansion? | Tied to one product or postcode |
| Reputation | Does it sound credible to customers? | Accidental negative or misleading meaning |
Test the shortlist with real people who match your likely customers. Ask them to spell each option after hearing it once. Then ask what type of business they expect from the name. If the business idea itself is still changing, solve that before fixing the brand.
Magzonia’s good-business-ideas guide can help you pressure-test the concept. Home-based founders can also compare practical startup options before committing to a narrow brand.
Common Naming Mistakes to Avoid
The first mistake is checking only whether an exact spelling appears on Companies House. Similarity rules can catch names that look or sound close to existing entries. Search variants before treating availability as settled. The second mistake is treating incorporation as brand protection. Companies House and the Intellectual Property Office perform different functions.
A separate trade mark search can reveal conflicts that the incorporation process does not resolve. The third mistake is buying everything before the checks are complete. Domains, packaging, uniforms, signage, and design work can become sunk costs. Complete the legal searches before committing to materials that are expensive to replace.
The fourth mistake is choosing wording that becomes restrictive after early growth. A location, product, or narrow audience can quickly become outdated. Choose specificity only when it supports a deliberate long-term position.
Can You Change the Registered Name Later?
Yes, a limited company can change its registered name after incorporation. The change can follow a special resolution or permission within the articles. The new name only becomes official after Companies House registers it. Changing later creates work beyond the filing itself.
You may need to update banking, invoices, contracts, websites, email signatures, and marketing materials. Customers and suppliers also need clear notice so the change does not create confusion. The standard online filing fee for a special-resolution name change is currently £20. Paper filing costs £30 under the current Companies House fee schedule.
Spending extra time on the original checks can therefore avoid both fees and disruption.
Your Next Step
Shortlist three names, then run the Companies House and UK trade mark searches today. Remove any option with legal uncertainty before comparing branding strength. When one choice passes every check, complete the incorporation application through the official service.
If you are still testing the concept, revisit the business idea before paying for branding. Magzonia’s home-business guide can help founders compare low-overhead routes. Keep your final choice clear, defensible, and flexible enough for the business you expect to build.
Frequently Asked Questions
How do I check if a company name is available in the UK?
Use the Companies House register and official availability checker before applying. Search close variations as well as the exact spelling you prefer. Then check the UK trade mark register for similar brands in relevant classes.
Does registering with Companies House protect my brand?
No, incorporation and trade mark protection are different systems. Companies House controls registered corporate names, while the Intellectual Property Office handles UK trade marks. Seek specialist advice if a conflict seems possible or commercially important.
Can a sole trader use “Limited” or “Ltd” in a trading name?
A sole trader’s business name must not use “Limited” or “Ltd.” Those endings indicate a limited company and are restricted in trading names. Sole traders should also check sensitive words and existing trade marks before branding.
Can two UK companies use similar names?
They can sometimes have different names that still look or sound similar. Companies House can reject names treated as the same as existing entries. A “too like” complaint can also force a registered business to change its name.
Do I need a domain before I incorporate?
No domain purchase is required for Companies House incorporation. Still, checking domain availability before registration can prevent an awkward brand mismatch. Secure suitable digital assets promptly once the legal checks are clear.
