The day you decide to become a sole trader, nothing official happens. No letter arrives, no certificate, no badge. You just start doing paid work and the paperwork catches up with you later. That gap is where most people come unstuck, because they quietly assume somebody will tell them what to do next.
Nobody will.
So here is the order things actually need to happen in, what each bit costs, and which of them you can safely leave until month three.
What You Have To Do To Become A Sole Trader
Legally, a sole trader is a self employed person running their own business who is personally responsible for it. There is no separate legal entity. You and the business are the same thing, which is both the great advantage and the risk.
You do not need permission to become a sole trader. You need to tell HMRC, and then you need to file a tax return every year. That is the whole compulsory list.
To become a sole trader in HMRC’s eyes you register for Self Assessment. It is free, it takes about fifteen minutes online, and you can do it from the set up as a sole trader page on gov.uk. You will get a Unique Taxpayer Reference, or UTR, which is a ten digit number you will need every January for the rest of your working life. Keep it somewhere you will find it.
The 5 October Deadline People Miss
You must register by 5 October following the end of the tax year in which you started trading. Start work in June, and you have until the October of the next year. That sounds generous, and it is, which is exactly why people forget and get a penalty for failing to notify.
Do it in your first month. It costs nothing and it removes a nagging job from your head.
One useful exception: if you earn under £1,000 from self employment in a tax year, the trading allowance means you generally do not need to register or declare it. Selling a few cakes at a school fair is not a business. If you are hoping to make a living, assume you are over that line from the start.
On tax, keep it simple. You pay income tax on your profits, not your turnover, plus Class 4 National Insurance. If your profits are tiny you may want to pay voluntary Class 2 contributions to protect your state pension record. Rates change most years, so check the current figures on gov.uk rather than a forum post from three years ago. And once your turnover approaches £90,000 in a rolling twelve months, VAT registration becomes compulsory.
Sole Trader Or Limited Company?
This is the question that stalls people for weeks, and it rarely deserves that much attention in year one.
A limited company costs £50 to register with Companies House online, plus £34 a year for the confirmation statement, plus an accountant who will probably charge you somewhere between £600 and £1,500 a year to do the accounts and corporation tax return. In exchange you get limited liability, a name nobody else can take, and once your profits climb, a more efficient way of taking money out.
Sole trader means no filing fee, no public register of your accounts, and a tax return you can genuinely do yourself if your affairs are simple.
Plenty of people become a sole trader for two or three years and incorporate once the profit justifies the extra admin. That is a perfectly respectable path, and switching later is not painful.
The honest cases for going limited straight away: you are taking on work with real financial exposure, like building projects where a mistake could cost six figures. You are chasing contracts with large firms or councils whose procurement rules quietly favour companies. Or you are going into business with someone else, in which case you want the ownership written down properly rather than agreed over a pint.
Naming The Business Without Stepping On A Landmine
When you become a sole trader you can trade under your own name, or under a trading name like Fairfield Joinery. You do not register a trading name anywhere, which sounds liberating and has a sting in the tail: it means nobody has checked that it is free, and nobody is stopping the next person using it.
Before you order 500 leaflets, do three checks. Search the name on Companies House. Search the Intellectual Property Office trade mark database. Then just Google it, including your county, because a plumber forty miles away with the same name will confuse your customers forever.
A few rules that catch people out. You cannot use “Limited”, “Ltd”, “LLP” or “plc” in a sole trader name. You cannot imply a connection with government or the Royal family. And on your invoices and letters you must show your own name as well as the trading name.
One more thought. Names that describe what you do and where you do it are easier to find and easier to say on the phone. Clever names age badly.
A Business Bank Account Is Not Compulsory, But Open One Anyway
Nobody forces you to open a separate account when you become a sole trader. Legally your business money is your money.
Do it regardless.
The reason is bookkeeping, not law. If your van diesel, your Screwfix runs and your Tesco shop all come out of the same account, then next January you will spend an entire Sunday scrolling through statements trying to remember what a £43.20 payment in August was for. One clean account, one card, and your records more or less write themselves.
Most high street and app based accounts give sole traders twelve to eighteen months free, then charge somewhere around £6 to £10 a month. That is a fair price for getting your Sundays back.
Insurance: What Is Compulsory And What Is Just Sensible
Only two types of cover are genuinely required by law for most small operations.
- Employers’ liability insurance, the moment you employ anybody, even part time or a family member. Trading without it can cost £2,500 for every day you are uninsured.
- Motor insurance with business use, if you drive for work. Social, domestic and pleasure cover does not include driving to a customer’s house with tools in the back.
Everything else is optional in law and often compulsory in practice. Most people who become a sole trader in a trade carry public liability cover at £1m, £2m or £5m, because letting agents, main contractors and councils will not let you on site without it. For consultants, coaches, bookkeepers and therapists, professional indemnity matters more: it covers the advice you gave, not the ladder you dropped. Several professional bodies make it a condition of membership.
Then there is tools cover, which sounds like an upsell until you price a replacement set of Festool kit after a van break in.
The Licences And Registrations Nobody Mentions
Some of these apply the moment you become a sole trader, not when you get busy.
- Food businesses, including home bakers and mobile caterers, must register with the local council at least 28 days before trading. It is free and you cannot be refused.
- Gas work needs Gas Safe registration. Electrical work usually needs a competent person scheme if you are certifying your own work.
- Moving other people’s waste, including garden clearances and house clearances, needs a waste carrier registration with the Environment Agency.
- Working with children or vulnerable adults means DBS checks, and often a specific level of check.
- Playing music in a salon, cafe or gym needs a TheMusicLicence from PPL PRS. Streaming from your own Spotify account is not covered.
- If you run CCTV or handle certain kinds of personal data, you may owe the ICO a data protection fee, which starts at £52 a year for the smallest organisations.
None of this is exciting. All of it is cheaper than the alternative.
Keeping Records From Day One
The best day to start bookkeeping is the day you become a sole trader. The second best is today. The worst is the third week of January, when you are sitting on the floor surrounded by faded receipts.
What you actually need to keep: every sale and the date of it, every business expense with proof, your bank statements, and a mileage log if you claim for driving. HMRC expects you to hold records for at least five years after the 31 January submission deadline for that return.
Two shortcuts worth knowing. Mileage can be claimed at 45p a mile for the first 10,000 business miles in a year, then 25p, which is usually simpler and more generous than working out the real cost of your car. And if you work from home, simplified expenses let you claim a flat £10, £18 or £26 a month depending on how many hours you work there, with no calculations at all.
A spreadsheet is fine for the first year. Genuinely fine. Software becomes worth the £10 a month when you are raising more than about ten invoices a month, or when HMRC’s Making Tax Digital rules reach you, which is being phased in by turnover starting with the highest earners.
Pricing Your First Jobs
Here is the mistake almost everyone makes. They take the hourly rate they earned as an employee, add a bit, and quote that.
It does not work, because an employee gets paid for every hour they are at work. You will not.
Try this instead. Decide what you want to earn as profit before tax, say £32,000. Add your running costs: van, insurance, phone, tools, accountant, fuel, maybe £6,000. That is £38,000 to recover. Now be brutal about billable hours. Between quoting, travelling, invoice chasing, buying materials and the days nobody books you, a realistic first year is around 1,000 to 1,200 charged hours, not 1,800. £38,000 divided by 1,000 is £38 an hour, and that is your floor, not your ambition.
The first quotes you write after you become a sole trader set an anchor. Customers remember what you charged them, and putting your price up by 30% in month six is a much harder conversation than starting at the right number. Undercutting the local competition by a fiver an hour is not a strategy either. It just brings you the customers who will leave you for the next person charging a fiver less.
Ask for a deposit on anything involving materials. Put payment terms on the invoice, in writing, from job one.
Finding The First Few Customers
You do not need much to become a sole trader who is actually busy. You need people to know you exist and to have a reason to trust you.
Start with the people who already do. Tell every former colleague, supplier, neighbour and mate what you are doing now, specifically, with the area you cover. Vague announcements get vague responses. “I’m doing bathroom refits across Leeds and Wakefield, and I’ve got space from the second week of March” gets phone calls.
If you left an employer on good terms, ask about overflow work. Small firms turn away jobs constantly and are usually happy to pass on the ones that do not fit.
Then ask for a review or a photo after every single job, from the first one. Five recent reviews will win you more work in your first year than any amount of paid advertising, and a Google Business Profile costs nothing to set up.
Somewhere in month two or three, you will want a place online that people land on when they check you out. A single page with your phone number, the towns you cover and eight photos of finished work does more than a logo ever will. If building it yourself is not your idea of a good evening, that is what our affordable website design is for. But do not spend a penny on it before your insurance and your bank account are sorted, and do not let it become the thing you hide behind instead of picking up the phone.
When You Should Not Become A Sole Trader Yet
A few situations where I would pause.
You still have an employment contract with a restrictive covenant or an outside interests clause. Read it. People have lost jobs over side businesses in the same sector.
You are going in with a partner and planning to “sort the details later”. Details never get sorted later, they get argued about later.
Your work carries liability that could swallow your house. A sole trader has no corporate shield, and while insurance covers most of it, some risks are better sat inside a limited company.
Or you have not tested whether anyone will pay for this. There is nothing wrong with doing three paid jobs at evenings and weekends before you hand your notice in.
So What Does It Really Take To Become A Sole Trader?
One free online form, filed by 5 October after your first tax year, and the discipline to keep your receipts. Everything past that is judgement: the name, the insurance, the account, the price you put on your time.
Do the registration this week. Do the insurance before your first job. Give yourself a month to think about the name, and use the version of it a customer could repeat down the phone without spelling it.
We write more on getting started, pricing and finding work over on the blog, and if you have a question you cannot find an answer to anywhere sensible, drop us a line. We will tell you straight, even when the answer is that you do not need us.