Accounting and Tax for Sole Traders in the UK

Who this guide is for

This guide is for self-employed people, freelancers, tradespeople, consultants, delivery drivers, subcontractors and side-business owners operating as sole traders in the UK.

What is a sole trader?

A sole trader is an individual who runs a business in their own name or under a trading name.

You keep the profits after tax, but you are also personally responsible for the business. There is no separate legal entity like there is with a limited company.

Sole trader status is often the simplest way to start, especially for small or low-risk businesses.

Registering as self-employed

If you need to report self-employed income, you may need to register for Self Assessment with HMRC.

Once registered, HMRC issues a UTR and expects a tax return for the relevant tax year.

The registration deadline is usually 5 October after the end of the tax year in which the income started.

Keeping records

Sole traders need records of business income and expenses.

These may include:

• sales invoices
• receipts
• bank statements
• mileage records
• business equipment purchases
• home-working calculations
• CIS deduction statements
• details of other income

Good records make tax returns easier and help support expense claims.

Claiming expenses

Sole traders can usually claim allowable business expenses when calculating taxable profit.

Common expenses can include tools, materials, software, business travel, accountancy fees, phone use, home office costs and other business-related costs.

Private costs should not be claimed as business expenses.

Self Assessment deadlines

The UK tax year runs from 6 April to 5 April.

Online Self Assessment tax returns are usually due by 31 January after the end of the tax year. Tax due is normally payable by the same date.

Payments on account may also apply, which can create a higher first payment than expected.

VAT, CIS and MTD

Sole traders may need to register for VAT if taxable turnover exceeds the VAT threshold or if voluntary registration makes sense.

Construction subcontractors may fall under CIS and still need Self Assessment.

Making Tax Digital for Income Tax is being introduced in stages for sole traders and landlords with qualifying income above the relevant thresholds.

Common mistakes

A common mistake is using personal bank statements without clear business records.

Another mistake is assuming small income does not need checking. Allowances and reporting rules need to be reviewed.

Some sole traders also forget to save for tax and National Insurance throughout the year.

Finally, many people confuse turnover with profit. Tax calculations are based on profit, but VAT and MTD thresholds can be based on gross income or taxable turnover.

What to do next

If you are a sole trader:

1. Check whether you need to register for Self Assessment.
2. Keep income and expense records.
3. Separate business and personal transactions where possible.
4. Track tax deadlines.
5. Monitor VAT and MTD thresholds.
6. Ask an accountant if your income sources are mixed or growing.