The best domain name for a UK business is your business name, short, spelled the obvious way, on.co.uk or.com. That is the whole answer for most people. It should survive being said down a bad phone line without you having to spell it twice, and it should match the name on your van and your invoices. This page covers which ending to pick, what to do when the one you want is gone, and the renewal mistake that takes working websites offline.
At a glance
| Feature | Detail |
|---|---|
| Best choice for a UK business | Your business name on.co.uk, and the.com too if you can get it |
| The test | Say it once over a bad phone line — can they type it correctly? |
| Length | Short. No hyphens, no numbers, no deliberate misspellings |
| If it is taken | Add your town or your trade before you consider buying it from someone |
| Cost | A few pounds a year for most endings |
| The big mistake | Letting it lapse. Turn on auto-renew and keep the card valid |
##.co.uk,.com, or one of the newer endings
The bit after the dot is called the extension. For a UK business the shortlist is short.
.co.uk is the normal choice for a business trading in the UK. It signals immediately that you are British, customers here expect it, and it is usually cheaper and more available than.com. If you serve customers in one country and that country is the UK,.co.uk is the safe default.
.com is the one everybody types by accident, which is the real argument for it. It is the right choice if you sell internationally, and it is worth holding alongside your.co.uk if you can, pointed at the same site, so that a customer who guesses wrong still lands on you.
.uk is the shorter version of.co.uk. It is fine, but plenty of people still type.co.uk out of habit, so if you take.uk, take.co.uk as well.
The newer endings —.shop,.agency,.studio,.co,.io and hundreds more — look modern and are usually available. Be careful. Customers who have never seen them assume they have misheard you, and some will type.com anyway and end up somewhere else. They work best when the ending is part of the name and reads naturally. If you take one, still buy the.co.uk if it exists, even if you never use it.
One thing not to do: buy fifteen extensions "to protect the brand". Two is plenty for a new business, and the money is better spent elsewhere.
What makes a domain work
Short. Fewer characters, fewer chances to mistype. Drop filler words — "the", "uk", "ltd", "online" — unless they earn their place.
Spellable after hearing it once. This is the whole test. If your name has a creative spelling, a silent letter or a word people muddle, the domain inherits the problem and you will spend years saying "that's with two Ls". Read it aloud to someone who has never seen it written down and watch them type it.
Sayable over a bad phone line. You will read this address out from a noisy van, from a job, from a shop floor. "kingsburycarpets.co.uk" survives that. "k-b-carpets-uk.co.uk" does not.
No hyphens, no numbers. Both need explaining every single time. "4" or "four", hyphen or no hyphen — every ambiguity is an enquiry that goes to someone else.
Nothing you would be embarrassed to read out. Run the words together and look at the result properly. Plenty of businesses have discovered an unfortunate second reading only after printing the vans.
Match it to the business name
Your domain should be the name on your sign, with the spaces taken out. When they differ, everything gets harder: people misremember which one to type, your printed material and your website say different things, and you spend money teaching customers something that should have been obvious.
So the order matters. Pick the name and check the domain before you commit to either. Our business name guide covers naming approaches and the availability checks worth doing — Companies House, the domain, your social handles and the trademark register — and it is much cheaper to change your mind at that stage than after the signwriter has been.
Once the name is settled, the rest of the look follows from it. Create your brand guidelines free with Plan. Answer a few quick questions about the look you want, and Plan puts together your colours, typefaces and a brand guidelines document — free, and built around the name you have chosen.
When the domain you want is taken
Most obvious domains are gone. This is normal and it is rarely a crisis.
First, look at what is actually there. Type it in. If it is a real, active business — especially one in your trade or your area — that is a warning about the name itself, not just the domain. Walk away and think again. If it is a parked page, an expired advert wall, or nothing at all, you have options.
Add something true. Your town, your county, or your trade. "readingemergencyplumbing.co.uk" is longer than "plumbing.co.uk" and infinitely more gettable, and for a local business the extra words help customers and search engines understand what you do and where. This is the fix that works for most people, and it costs nothing.
Try the other ending. If the.com is held but the.co.uk is free and you trade in the UK, take the.co.uk and stop worrying about it.
Buying it from the current owner is the last option, and it is worth being clear-eyed about it. Sometimes a domain is genuinely for sale at a sensible price and it is the right buy — usually when the name is already your registered business name, you are already trading under it, and the exact-match address will save you explaining it for the next decade. Often it is not: a domain broker asking four figures for a name you have not started using yet is selling you a feeling. You have no rights to a domain just because you like it, and a new business with no customers cannot recover that money quickly. If you do buy, use an escrow service so the money and the domain change hands together, and never pay by bank transfer to someone who contacted you first.
A useful sanity check before you spend anything: what would that money buy in customers instead? For most new businesses, a slightly longer domain plus the same money spent on being found is the better trade.
Registering it, what it costs, and the mistake that takes sites offline
Buying a domain takes about five minutes. You go to a registrar — the company that sells and manages domains, such as those built into site builders, or a standalone one — search for the name, and pay for a year or more. It costs a few pounds a year for most endings.
Two things to watch when you buy:
The first year is often cheap and the second is not. Introductory pricing is normal. Check the renewal price before you commit, because that is the number you will pay every year afterwards.
Privacy on the register. UK domain records can show the registrant's name and address. If you run the business from home, check whether your registrar can keep your address off the public record.
Then do the one thing that matters more than everything else on this page. Turn on auto-renew, and make sure the payment card on the account is one that still works. A lapsed domain is the most common own goal in small business admin, and it is entirely avoidable. What happens is dull and expensive: the card expires, the renewal notice goes to an old email address, and one morning the website is gone and the email stops arriving. Customers get bounce-backs. Your search rankings, built over years, drop out. There is a grace period to get it back, and after that anyone can register it — including someone who noticed it expired and now wants paying.
Put a calendar reminder a month before the renewal date as a backstop, and keep the registrar account on an email address you will still have in five years.
Email on your own domain
Once you own the domain you can have email at it: jamie@jamiesplumbing.co.uk instead of a free webmail address. Do it. It costs a little per person per month with the usual providers, and it changes how you look to customers, suppliers and anyone deciding whether to hand you a deposit.
It also protects you. A free email address is tied to a platform you do not control; an address on your own domain moves with you, and you can add addresses for a second person later without changing anything customers know.
Set it up when you register the domain, not later, and put the new address on everything from day one. Changing an email address customers already have is a genuine nuisance.
A domain is not a trademark
Owning a domain means you have rented that web address. It does not give you the right to the name.
Those are two different things, and the gap catches people out. Someone else can hold a registered trademark for your name in your sector, and a trademark is enforceable — they can require you to stop trading under it and, in some cases, to hand over the domain, no matter how long you have paid the renewal. It works the other way too: holding the domain does not stop a competitor using a very similar name.
So check the name against the trademark register before you build anything on it. Trademarks are registered by sector, so the same words can be free for a plumbing business and taken for a clothing brand, which means you check against what you actually sell. Search the official register at GOV.UK's trademark search — it takes minutes and costs nothing. If the name is central to how you make money, our guide to trademarking a business name covers registering your own and whether it is worth it for you. This is a plain explanation, not legal advice.
Frequently asked questions
Should I use.co.uk or.com? Use.co.uk if you trade in the UK — customers here expect it and it is usually easier to get. Buy the.com as well if it is available and point it at the same site, so anyone who types the wrong one still finds you. If you sell internationally, lead with the.com.
How much does a domain name cost? A few pounds a year for common endings, with the first year often discounted and the renewal higher. Novelty endings and short, in-demand names cost more. Anything being sold by an existing owner is priced by them and can run to thousands.
What happens if my domain expires? Your website goes offline and email on that domain stops working. There is a grace period to renew it late, and after that it can be registered by anyone. Turn on auto-renew, keep a valid card on the account, and use an email address you will still have in five years.
Can I buy a domain someone else owns? Sometimes, through a broker or the owner directly, but you have no right to it and the price is whatever they ask. Before paying, ask what the same money would buy in customers. Adding your town or trade to the name usually solves the problem for nothing. If you do buy, use an escrow service.
Does owning a domain protect my business name? No. A domain is a rented web address; a trademark is a legal right to a name for particular goods or services, and it is the one that is enforceable. Check your name on GOV.UK's trademark search against what you sell before you build a business on it.
Figures correct as of September 2026. Tax thresholds, fees and rates change; check the linked GOV.UK pages before acting. Prices and costs shown are indicative and vary by area and by what's included.
What is Plan?
Plan is a free business operating system for people starting or newly running a UK business. It walks you, one simple step at a time, from your elevator pitch through brand, product and pricing, to a complete business plan — then uses everything it now knows about the business to help with the basics: logo and brand, marketing, a website, a bank account, funding, insurance, company registration. You can use as much or as little as you want.
Two ways to do this
Sort the name and the look yourself, free. Plan takes you through the naming decisions in the order that makes them easy, then creates your brand guidelines — colours, typefaces and the document — free. It runs in your browser, and you can do just this bit and leave the rest.
Or have the website handled. Once the domain is yours, our sister agency The Fractions build websites for small UK businesses, including the bit that turns visitors into enquiries.