Naming your venture is one of the first real decisions you make when starting a business, and one of the hardest to undo. If you are working out how to name your business in the UK, you need to understand the legal rules, the branding trade-offs and the true costs before you commit. Our view, after years of watching founders trip at this hurdle: the single biggest naming mistake is falling in love with a name before you have checked it. Do the unglamorous checks first, then get attached.
UK legal rules for naming your business
If you’re forming a limited company in the UK, Companies House sets strict rules for your business name. Your name cannot be identical to another registered company. It also cannot include offensive words or imply connections to government bodies without permission. It must end in ‘Limited’ or ‘Ltd’ or, for companies registered in Wales, the Welsh equivalents ‘Cyfyngedig’ or ‘Cyf’. Public companies must end in ‘plc’.
Sole traders and partnerships follow different rules. Your legal name will often be your own full name (or all partners’ names), but you can use a separate trading name. That trading name still must not include ‘Ltd’, ‘LLP’, ‘plc’ or similar endings. Sole trading is the most common business structure in the UK, so these rules apply to most first-time founders, even those planning to incorporate later. If you have not yet decided on a structure, our guide to choosing between sole trader and limited company covers the naming, tax and liability differences in full.
Trade mark and protection costs for your business name
Before you commit to a name, make sure it is not already a registered trade mark. From April 2026, applying for a trade mark online costs £205 for one class of goods or services (up from £170). Each extra class adds £60 (up from £50). If you’re worried your name might be rejected, you can use a Right Start application. This costs £125, plus £30 for each additional class (previously £100 plus £25).
Registration gives you exclusive rights to use the mark for the goods and services it covers for ten years, and you can renew it for further ten-year terms indefinitely. Here is the part founders miss: the application fee is the cheap bit. The expensive mistake is paying to register a mark the Intellectual Property Office (IPO) was always going to refuse because it is too descriptive or too close to an existing one. Search the register carefully before you apply, and before you order a single business card. The IPO increased its fees from April 2026, citing inflation-related pressure.
Search and SEO: why your business name matters online
Your name also shapes how easily customers find you online. A distinctive name is far easier to rank for than a descriptive one. Call yourself “Best Cleaning UK” and you are competing with every cleaning company targeting the same phrase. Choose something ownable and you can realistically dominate page one for it within months.
Before you commit, search your shortlist. If the results are already crowded with similar businesses, or the obvious.co.uk and.uk domains are gone, treat that as a warning sign rather than a problem to design around. And resist the urge to stuff keywords into the name itself: it weakens your trade mark position and rarely helps rankings as much as founders expect. A name that is short, easy to spell and easy to say aloud will serve you better in search, in person and on the phone.
Practical steps for choosing your business name
- List what you want your name to communicate: product or service, values, target audience, place. Names tied to your niche help customers find you.
- Keep it simple: aim for one to three words and avoid unusual spellings unless they suit your brand voice. A simple name encourages recall.
- Check the Companies House register to see whether the name is taken or “too like” an existing one. Then search the trade mark register to catch conflicts before filing.
- Check domain availability (.uk,.co.uk,.com). Even if you only trade locally, a missing common extension can cause confusion or misdirected customers.
- Review whether your name limits future growth. Geographic naming (Manchester Bakers) may hinder expansion elsewhere, and product-specific names may limit you if your range widens.
- Think about legal endings: if you incorporate, include “Ltd” or “Limited”; if not, avoid misusing these suffixes. Sensitive words such as “bank”, “authority” and “Royal” need prior permission.
- Plan for trade mark protection. Use the IPO register, decide how many classes you will need and budget accordingly. Consider professional help if your name is creative or unusual.
Common mistakes to avoid when naming your business
- Choosing a name that is too generic (for example, “Best Cleaning UK”). Such names are hard to register as trade marks and perform poorly in search.
- Ignoring legal restrictions: sensitive words, implying government endorsement, incorrect suffixes.
- Overlooking domain and social handle availability. Finding out later that the domain you want is taken adds cost and confusion.
- Missing trade mark clashes. Even if Companies House accepts your name, you can still face opposition or legal action for trade mark infringement. Company registration and trade mark registration are separate systems, and clearing one does not clear the other.
- Picking a name that ties you to too narrow a niche, making it difficult to pivot later.
Worked example: naming a bakery in 2026
Suppose you are setting up a bakery in London named “Thyme & Dough Ltd”. Before registering as a limited company, you must check:
- Whether “Thyme & Dough Ltd” is already on Companies House, or is “too like” “Thyme & Dough Bakery Ltd”, which Companies House could flag.
- The name must end with “Ltd” if you’re using that legal form.
- Whether “Thyme & Dough” is already a registered trade mark in a food or bakery class. If it is free, registering it online costs £205 for one class plus £60 per additional class (fees from April 2026).
- Whether you can secure thymeanddough.co.uk, thymeanddough.uk and thymeanddough.com. If not, you may want to buy them to prevent confusion.
- Social media handles: if “@thymeanddough” is taken on Instagram, see whether adding “uk” or “bakery” works.
The checks themselves cost nothing but an afternoon. Protecting the name with a single-class trade mark and the main domains comes in under £250 all in, which is cheap insurance against a forced rebrand.
Final checklist before you commit
- Legal compliance: correct suffix, no restricted words, no implied government connection
- Clear of both the Companies House register and the IPO trade mark register
- Matching domains and social media handles secured, or at least available
- Trade mark budget set aside: £205 for one class from April 2026
- Room to grow: the name still works if you move, expand or pivot
A good name will not make a business succeed on its own, but a bad one makes everything harder: registration, protection, search and word of mouth. Do the checks once, properly, and you never have to think about this again. Ready for the next step? Our guide shows you how to set up your business today, and our complete guide to starting a business in the UK covers everything from structure to funding.
