How to Register as a Sole Trader in the UK: Step by Step 2026

What Does Registering as a Sole Trader Mean?

Registering as a sole trader means telling HMRC that you are self-employed and will be responsible for paying your own income tax and National Insurance through Self Assessment. It is the simplest business structure in the UK and requires no formal company setup.

As a sole trader, you and your business are legally the same entity. You keep all profits after tax, but you are also personally responsible for any business debts.

When Must You Register?

You must register with HMRC as self-employed by 5 October in your business's second tax year. For example, if you start trading in June 2026 (tax year 2026/27), you must register by 5 October 2027.

However, registering sooner is strongly recommended. Early registration means:

• You receive your UTR (Unique Taxpayer Reference) quickly
• You can start tracking expenses from day one
• You avoid any risk of late registration penalties
• You can set up for Making Tax Digital if required

Step-by-Step Registration

Step 1: Check You Need to Register

You need to register if you:

• Earn more than £1,000 from self-employment in a tax year (above the trading allowance)
• Want to make voluntary Class 2 National Insurance contributions to protect your State Pension
• Need to prove you are self-employed (for a mortgage, visa, etc.)

If your self-employment income is under £1,000, you can use the trading allowance and may not need to register. But registration is still advisable if you expect to grow.

Step 2: Gather Your Information

Before registering, you will need:

• Your full name and date of birth
• Your National Insurance number
• Your address
• Your phone number and email address
• The date you started (or will start) self-employment
• The nature of your business (what you do)
• Your business address (can be your home)
• Your business name (if different from your personal name)

Step 3: Register Online

The fastest way to register is through GOV.UK:

1. Go to GOV.UK and search for "register for Self Assessment"
2. Select "Register if you're self-employed"
3. Sign in with your Government Gateway account (or create one)
4. Complete the registration form with your personal and business details
5. Submit the registration

HMRC will process your registration and send you:

• A Unique Taxpayer Reference (UTR) — a 10-digit number, sent by post within 10 working days (up to 21 days if you are abroad)
• A letter confirming your registration for Self Assessment

Step 4: Set Up Your Government Gateway Account

If you do not already have one, create a Government Gateway account. This gives you access to HMRC's online services, including:

• Filing your Self Assessment tax return
• Viewing your tax position
• Making payments
• Managing your personal tax account

Step 5: Keep Your UTR Safe

Your UTR is your unique identifier with HMRC. You will need it for:

• Filing tax returns
• Corresponding with HMRC
• Setting up accounting software
• Providing to clients who need to verify your tax status (such as CIS contractors)

National Insurance as a Sole Trader

When you register as self-employed, you become liable for:

Class 2 National Insurance

• Rate: £3.45 per week (2025/26)
• Paid if your profits exceed the Small Profits Threshold (£6,725)
• Counts towards your State Pension qualifying years

Class 4 National Insurance

• Rate: 6% on profits between £12,570 and £50,270
• Rate: 2% on profits above £50,270
• Paid through Self Assessment
• Does NOT count towards State Pension

Both are calculated and paid as part of your annual Self Assessment.

What Happens After Registration

You Must File a Tax Return

Once registered, you must file a Self Assessment tax return every year, even if you made a loss or had no income. The deadline is:

• 31 October for paper returns
• 31 January for online returns

You Must Keep Records

Keep records of all income and expenses from the date you start trading. Records must be kept for at least five years after the 31 January deadline for that tax year.

You Must Pay Tax on Time

Income tax and National Insurance are due on:

• 31 January following the end of the tax year
• 31 July (second payment on account, if applicable)

Making Tax Digital

From April 2026, self-employed individuals with income over £50,000 must use MTD-compatible software to keep digital records and submit quarterly updates to HMRC. If your income exceeds this threshold, you will need compatible software from the start of the 2026/27 tax year.

Choosing a Business Name

As a sole trader, you can trade under your own name or choose a business name. There are no registration requirements for a business name (unlike limited companies), but you must:

• Include your personal name and business address on all business correspondence
• Not use a name that is offensive or implies a connection to government or royalty
• Not use a name that is the same as an existing trademark in your industry

VAT Registration

If your taxable turnover exceeds the VAT threshold (£90,000 for 2025/26), you must register for VAT. You can also register voluntarily below this threshold if it benefits your business (for example, to reclaim VAT on expenses).

Opening a Business Bank Account

While not legally required, a separate business bank account is strongly recommended:

• Keeps personal and business finances separate
• Makes bookkeeping much easier
• Looks more professional to clients
• Required by some banks for business transactions
• Makes tax calculations simpler

Common Registration Mistakes

1. Registering Too Late

Register as soon as you start trading or intend to start. Late registration can result in penalties.

2. Not Registering at All

Some people assume that small amounts of self-employment income do not need declaring. If you earn over £1,000, you should register.

3. Confusing Sole Trader with Limited Company

Registering as a sole trader is different from forming a limited company. A sole trader registers for Self Assessment. A limited company registers with Companies House and has different tax obligations.

4. Not Setting Aside Money for Tax

Your income arrives gross — no tax is deducted. Set aside 25-30% of your profit from day one so the tax bill does not come as a shock.

How Accounted Helps New Sole Traders

Accounted is built for UK sole traders from day one:

• Bank feed connection — link your business bank account and Penny categorises transactions automatically
• Receipt capture — snap receipts via WhatsApp from the start
• Tax estimate — see your projected tax bill in real time as you earn
• MTD compliance — ready for Making Tax Digital requirements
• Self Assessment preparation — all your data ready when it is time to file

Explore our pricing plans and get started on the right foot.

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Starting out as a sole trader? Get organised from day one. Sign up for Accounted and let Penny handle the bookkeeping so you can focus on building your business.