How to Register as Self-Employed in the UK (2026 Guide)

Quick answer: To register as self-employed in the UK, use the free GOV.UK sole trader registration service once you earn more than £1,000 from self-employment in a tax year. You need your National Insurance number, and you must register by 5 October after the end of that tax year. HMRC then posts your UTR.

Registering as self-employed is the official start of life as a sole trader. It sets up your Self Assessment record, your National Insurance as self-employed and the Unique Taxpayer Reference you will use for years. This guide explains when you need to register, how sole trader registration works step by step, what it costs (nothing), the 2026 to 2027 tax rates you will pay and what to do in your first months, including sending your first invoice with our free invoice generator.

Important: This is general information as of 2026, not tax or legal advice. Rules differ for partnerships, limited companies and some special cases. Check GOV.UK or a qualified adviser for your situation.

Do you need to register as self-employed?

GOV.UK says you must register as a sole trader if you earn more than £1,000 from self-employment in a tax year (6 April to 5 April). That £1,000 is the trading allowance. If your gross trading income is £1,000 or less, you generally do not need to tell HMRC, unless you have another reason to file a return.

The test is on gross income, not profit. If you sold £1,400 of handmade furniture but spent £900 on wood, your income is still over £1,000, so you need to register. The official guide to tax-free allowances on property and trading income explains the allowance in full.

Situations that commonly trigger registration

• Freelancing for clients, even alongside a full-time job.
• Running a trade such as cleaning, plumbing, tutoring or photography.
• Selling goods regularly online for profit, not just clearing out personal belongings.
• Working as a subcontractor in construction under CIS.
• Gig work through apps where you are not an employee.

Not sure if a sole trader is the right structure? Our comparison of sole trader vs limited company covers the tax and admin differences. A limited company registers with Companies House and pays Corporation Tax instead.

The registration deadline: 5 October

You must tell HMRC by 5 October after the end of the tax year in which you started. That gives you some breathing room, but not as much as people think.

You started trading between	Tax year	Register by	First online return due
6 April 2025 and 5 April 2026	2025 to 2026	5 October 2026	31 January 2027
6 April 2026 and 5 April 2027	2026 to 2027	5 October 2027	31 January 2028
6 April 2027 and 5 April 2028	2027 to 2028	5 October 2028	31 January 2029

GOV.UK states that registering late could lead to a penalty. The safest habit is to register in the month you start trading. You lose nothing by doing it early, and your UTR will be ready when a client or contractor asks for it.

How to register as self-employed, step by step

Sole trader registration is done online and is free. Here is the process:

1. Gather your details. National Insurance number (GOV.UK says you need one), name, home address, date of birth, phone, email, the date you started trading, a short description of your work and any business name or separate business address.
2. Go to the GOV.UK page for registering as a sole trader and select Start now.
3. Sign in or create sign-in details for HMRC online services. Keep these safe: you will use them for your return, payments and any Making Tax Digital sign-up.
4. Answer the questions about your business. Choose the description that best matches your work and give your start date accurately.
5. Submit and note your reference. HMRC then sets up Self Assessment and your self-employed National Insurance.
6. Wait for your UTR. HMRC posts it, usually around 15 days after registration. Our guide on how to get a UTR number covers delays and lost numbers.
7. Activate online services using any activation code you receive by post.

You can start trading and invoicing before the UTR arrives. The official GOV.UK sole trader registration page is the only route you need.

If you have registered before

If you were self-employed previously, or filed a return for another reason, you already have a UTR. The registration service lets you reactivate your record instead of creating a duplicate. Duplicates are a common cause of delayed returns and confusing statements.

What tax you pay as a sole trader in 2026 to 2027

As a sole trader you pay Income Tax and National Insurance on your profit: income minus allowable expenses. For the 2026 to 2027 tax year, GOV.UK gives these rates for England, Wales and Northern Ireland:

Band	Taxable profit	Income Tax	Class 4 NI
Personal allowance	Up to £12,570	0%	0%
Basic rate	£12,571 to £50,270	20%	6%
Higher rate	£50,271 to £125,140	40%	2%
Additional rate	Over £125,140	45%	2%

The personal allowance shrinks by £1 for every £2 of income over £100,000. Scotland sets its own Income Tax bands, though Class 4 is the same across the UK. Class 2 National Insurance is no longer compulsory: GOV.UK says you do not have to pay it if your profits are £7,105 or more, and if they are lower you can choose to pay voluntary contributions of £3.65 a week to protect your State Pension record.

Worked example: a first-year tax bill

Tom registers as a self-employed gardener and makes £20,000 profit in the 2026 to 2027 tax year, with no other income.

• Taxable profit above the personal allowance: £20,000 minus £12,570 = £7,430.
• Income Tax at 20%: £7,430 x 20% = £1,486.00.
• Class 4 NI at 6%: £7,430 x 6% = £445.80.
• Total for 2026 to 2027: £1,931.80.

Because the bill is over £1,000 and none was taxed at source, HMRC will also ask for a first payment on account for 2027 to 2028 of half that amount, £965.90. So on 31 January 2028 Tom pays £1,931.80 + £965.90 = £2,897.70, with another £965.90 due on 31 July 2028. Our guide to payments on account explains why this first-year jump happens and how to plan for it.

Other registrations to check

Registering as self-employed covers Income Tax and National Insurance. Depending on your business, you may also need:

• VAT registration if your VAT-taxable turnover goes over £90,000 in a rolling 12 months. See our guide to the VAT registration threshold.
• CIS registration if you work as a subcontractor in construction. Without it, contractors deduct 30% instead of 20%. Our CIS invoice template guide explains the rules.
• Employer (PAYE) registration if you take on staff.
• Licences or insurance required for your trade, such as food hygiene registration or public liability cover.

Making Tax Digital for new sole traders

Making Tax Digital for Income Tax became mandatory on 6 April 2026 for sole traders and landlords with qualifying income over £50,000. Those in it keep digital records with compatible software and send quarterly updates. For 2026 to 2027 the update deadlines are 7 August 2026, 7 November 2026, 7 February 2027 and 7 May 2027, with the tax return due by 31 January 2028.

The threshold falls to £30,000 from April 2027 and to £20,000 from April 2028. HMRC decides who is in scope using qualifying income from an earlier tax return, so a brand new sole trader is not normally pulled in straight away. Our full Making Tax Digital for Income Tax guide explains sign-up and exemptions.

Your first 30 days as a sole trader

Registration is the paperwork. These steps make the business run smoothly:

1. Choose a business name (or trade under your own name). Avoid words that suggest you are a limited company.
2. Open a separate account for business money. See our guide to a business bank account for freelancers.
3. Set up an invoice system with sequential numbers. Use the invoice number generator to pick a format and stick to it.
4. Agree payment terms in writing, and know your rights under the UK late payment rules.
5. Start a records routine: save receipts, track mileage and reconcile your bank account monthly. Our post on how to track business expenses has a simple system.
6. Put tax aside. Saving 20% to 30% of every payment received is a common rule of thumb for basic-rate sole traders.

What to show on a sole trader invoice

Include your name and any trading name, an address where documents can be served, the customer's name and address, a unique invoice number, the invoice date and supply date, a description of the work, the amount due and your payment terms. If you are VAT registered, add your VAT number and the VAT breakdown. Our sole trader invoice guide has a checklist, and a simple classic layout is a good place to start.

Records you must keep from day one

Registering as self-employed brings a legal duty to keep records that support your tax return. GOV.UK says that when you start trading you must keep records so you can work out your profit or loss. In practice that means:

• Every sales invoice you issue, with a unique number and date.
• Receipts and bills for business purchases.
• Bank statements for the account you use for the business.
• A mileage log if you claim travel by the mile.
• Any payment and deduction statements if you work under CIS.

HMRC generally expects Self Assessment records to be kept for at least 5 years after the 31 January deadline for the tax year they relate to. A simple monthly routine works well: issue invoices as soon as work is done, file receipts the same week, and reconcile the bank once a month. If you fall into Making Tax Digital later, records kept this way move into compatible software easily.

Worked example: setting tax aside

Using Tom's figures above, his £1,931.80 bill on £20,000 of profit is about 9.7% of profit, but the first January payment of £2,897.70 is about 14.5%. If he invoices roughly £1,667 a month (£20,000 divided by 12) and transfers 15% of each payment, about £250, into a tax savings account, he will have around £3,000 saved after 12 months, enough to cover the first January bill with a small buffer.

Common mistakes when registering

• Waiting for the return deadline. Registration (5 October) comes months before the return (31 January).
• Paying a third-party site to submit a free government form.
• Ignoring side income because tax is already deducted from your salary.
• Forgetting payments on account in the first year, which can almost double the first January bill.
• Mixing personal and business spending, which makes expense claims harder to support.

Register, then start invoicing

Learning how to register as self-employed takes minutes: check you are over the £1,000 trading allowance, have your National Insurance number ready, complete the free GOV.UK sole trader registration well before 5 October, and wait about 15 days for your UTR. Then focus on getting paid. Create your first professional invoice free with our invoice generator, and read the user guide to save your details for next time. Every invoice exports as a PDF, so it looks the same on your client's phone, laptop or printer.