How to Choose a Business Name in the UK (And Check It's Available)

Choosing a business name in the UK feels like a creative exercise, but it is also a legal and strategic one. Get it right, and you have a name that works on your invoices, your domain, your Companies House record, and your Instagram profile. Get it wrong, and you could face a rejection from Companies House, a legal challenge from a trademark holder, or the frustration of building a brand around a name you cannot own consistently online. This guide covers everything you need to know about choosing a strong business name for a UK business, the rules, the checks, the common mistakes, and how to do all of it faster.

Why is your business name is more than a label

In the UK, your business name serves several distinct functions simultaneously. For a limited company, your registered name is a legal identifier filed with Companies House. It appears on your Certificate of Incorporation, your annual accounts, your tax returns, and all legal documents. It is publicly searchable by anyone. Once registered, it is protected, so no other company can register the same name.

For a sole trader, you do not need to register your business name anywhere; you can trade under your own name or choose a business name without formal registration. However, an unregistered trading name has no legal protection, meaning anyone else can use the same name. Beyond the legal dimension, your name is your brand's first impression. It shapes how customers find you, how they remember you, and how they describe you to others. A name that is clear, distinctive, and available across the digital channels you need gives your business a foundation that a generic or already-taken name cannot.

The UK rules for business names

Before you start brainstorming, understanding the rules saves wasted time. For limited companies, your registered name must end in Limited or Ltd (or the Welsh equivalents Cyfyngedig or Cyf if registered in Wales). It must be unique; Companies House will reject any name that is identical to an existing registered company. Names that are "too similar" to an existing name or trademark may also be rejected or later challenged. Under the Economic Crime and Corporate Transparency Act 2023, Companies House has strengthened its powers to reject names that appear designed to mislead, contain random characters to obscure identity, or suggest false connections to government bodies or international organisations.

Sensitive words require special approval. Words like British, National, Royal, Institute, Bank, Insurance, Financial, Accredited, and anything implying a government connection cannot simply be added to your company name without obtaining permission from the relevant authority. If your proposed name includes one of these, your application will be rejected without the supporting documentation. For sole traders, there are fewer restrictions, but your trading name cannot include Limited, Ltd, LLP, or PLC, and it cannot be offensive or infringe an existing trademark.

How to check if your business name is available in the UK

There are three separate checks you should do, and the order matters.

Step 1 — Companies House name search. Go to find-and-update.company-information.service.gov.uk and search for your proposed name. The database is updated in real time and reflects all currently registered and recently dissolved companies. If your name is identical to or "too similar" to an existing registration, Companies House will flag it.
Too similar is worth understanding because it is broader than identical. Companies House considers names the same if the only differences are punctuation, common words like the or and, or word order. So Brown & Associates Ltd and Browns Associates Limited would likely be flagged as too similar.

Step 2 — Trademark search. A name that passes the Companies House availability check can still infringe an existing trademark. Search the UK Intellectual Property Office (IPO) trademark register at trademarks.ipo.gov.uk for your proposed name. If someone has registered a similar trademark in your industry category, using the same name, even after being successfully incorporated, it could expose you to legal action. This step catches what Companies House misses. It is free and takes less than ten minutes. It is also the step most new business owners skip, and occasionally regret.

Step 3 — Domain and social handle availability. Check whether yourbusinessname.com and yourbusinessname.co.uk are available. Then check @yourbusinessname on Instagram, X, and TikTok. If the domain is taken by an active business or a squatter, and the social handles are all occupied by someone else, that is a signal worth weighing before you commit to the name. Domain squatters do monitor Companies House filings and trademark applications. The time between choosing a name and publicly launching is when you are most exposed, register your domain and social handles as soon as you have decided on the name, not after the business is live.

A faster way to check everything at once

Doing these checks across multiple websites, Companies House, IPO, Namecheap, and Instagram, is time-consuming and fragmented. The BFSB Business Name Generator is a free tool that brings domain checking and brand kit generation into a single flow, alongside a Companies House search link so you can verify availability without leaving the page.

Here is what it does:

You enter your keywords and industry. The generator produces 15–20 business name ideas. For each name you click, you get instant .com and .co.uk domain availability via Namecheap, suggested Instagram, X, and TikTok handles to check, a brand colour palette matched to your industry, a font pairing recommendation, tagline suggestions, and a downloadable SVG logo, all free, no account required. It is built for both UK and Nigerian businesses, which means you can use it whether you are setting up a sole trader operation in London or a limited company serving both markets.

Try it at builtforsmallbusiness.com/tools/business-name

What makes a strong UK business name

Beyond availability, a strong business name for the UK market tends to share a few qualities. It is easy to spell and easy to say out loud. If you have to spell it out every time someone asks for your website, you are losing the SEO benefit of word-of-mouth. Keep it simple enough that someone who hears it once can find it by typing it

It is distinctive in your industry. Over 560 Companies House applications were rejected in 2024 alone due to name duplication or violations of naming rules. Most of the collisions happen because businesses in the same sector gravitate toward the same words. In professional services, everyone wants "Solutions." In construction, everyone wants "Build." Research your direct competitors before settling on a name.

It scales beyond your current offering. Manchester Dog Grooming Ltd is descriptive and clear today. It becomes limiting the moment you expand services or move location. Names that describe what you do at the broadest level, rather than what you do right now, give you room to grow without a rebrand. It has a clean digital presence available. The combination of an available .co.uk domain, an available .com, and matching social handles is increasingly rare for common words. If you find a name with all three available, that is worth weighing heavily in your decision.

Registering your business name in the UK

Once you have confirmed availability and decided on your name, registration works differently depending on your business structure. As a sole trader,you do not register your business name. You register yourself with HMRC for Self Assessment when you start earning more than £1,000 per year from self-employment. You can trade under any name that does not infringe a trademark or include restricted words, but the name is not formally protected.

Limited company, register at gov.uk/register-a-company. The fee is £100 for standard online registration, which is typically processed within 24 hours. You will need a registered UK address, details of all directors and shareholders, a SIC code for your business activity, and your chosen company name. Upon approval, Companies House issues a Certificate of Incorporation, and HMRC automatically creates a Corporation Tax record for the company, posting your company's UTR within approximately 14 days. Your registered company name is protected from the moment of incorporation; no other company can register the same name.

Trading names vs registered names

One important distinction that confuses many UK business owners: your registered company name and your trading name can be different. You might incorporate as "Brown Digital Solutions Ltd" but trade publicly as "BDS." Your invoices, website, and social media can all use "BDS" as long as your full registered name appears on all official documents and your registered office is clearly displayed. This gives you the flexibility to have a brand name that is more memorable or marketable than your formal company name. The same protection rules apply to trading names; they must not infringe existing trademarks, and they cannot include restricted words without approval. But they do not need to be registered separately with Companies House.

After you have your name, what to do next

Once your business name is confirmed and registered, there are several things worth doing before you start trading under it. Open a business bank account in the company name. Keep business and personal finances completely separate from day one. This makes your bookkeeping, expense tracking, and year-end accounts significantly cleaner.

Register for VAT if your taxable turnover is approaching or above £90,000. Below that threshold, VAT registration is optional but can be worth doing early if you buy significant amounts of equipment or services that include VAT. Set up professional invoicing from day one. Your invoices must legally include your full registered company name, registered address, and company number. Using proper invoicing software ensures your invoices are compliant and helps you track who owes you what. Built For Small Business handles invoicing, expense tracking, payroll, and client management, free for UK businesses, sole traders and limited companies alike.

Frequently Asked Questions: How to Choose a Business Name for Your UK Business

How do I check if a business name is available in the UK?
Search the Companies House register at find-and-update.company-information.service.gov.uk. Also, check the UK IPO trademark register and confirm the domain and social handles are available before committing to the name.

Does Companies House protect my business name?
Yes, once your limited company is registered, no other company can register the same name with Companies House. However, this is not the same as trademark protection. Someone could still use a similar trading name or have prior trademark rights to the name.

How much does it cost to register a company name in the UK?
The standard online registration fee is £100, payable directly to Companies House. Most applications are processed within 24 hours.

Can I reserve a company name with Companies House?
Companies House does not offer a name reservation service. The only way to secure a name is to complete a full company registration. If you want to hold a name without actively trading, you can register a dormant company.

What is the difference between a registered company name and a trading name?
Your registered company name is the legal name filed with Companies House; it must end in Limited or Ltd. Your trading name is what you use day-to-day for branding and marketing purposes. These can be different, but your trading name must still avoid trademark infringement.

Can a sole trader use any business name?
A sole trader can trade under any name that does not infringe an existing trademark or include restricted words. However, the name is not registered or protected, so anyone else can use the same trading name.

What happens if my chosen company name is rejected by Companies House?
You will need to submit a different name. Common reasons for rejection are that the name is too similar to an existing registration, it includes a sensitive or restricted word without the required approval, or it violates the Economic Crime and Corporate Transparency Act 2023 rules on misleading names.

Do I need to check trademarks separately from Companies House?
Yes, Companies House only checks against its own register of company names. It does not cross-reference the trademark register. A name can be available on Companies House but already trademarked by someone else. Always check both.

Can I use the BFSB Business Name Generator for UK businesses?
Yes, the tool supports both the UK and Nigerian markets. For UK searches, it checks .com and .co.uk domain availability, suggests social handles, and generates a brand kit. Go toBuilt for Small Business Name Generator

How do I protect my business name beyond Companies House registration?
Register a trademark with the UK Intellectual Property Office (IPO). Trademark registration gives you exclusive commercial rights to your name and logo in your registered categories, which Companies House registration does not provide. Search at trademarks.ipo.gov.uk.