business-structure

What is Sole Trader?

A sole trader is the simplest business structure - you and your business are legally the same. You keep all profits but have unlimited personal liability.

Example

You work as a freelance designer without forming a company. You pay Income Tax on your profits via Self Assessment.

Key Dates

How Sole Trader Works in Practice

A sole trader is the simplest form of business structure in the UK. There is no legal distinction between you and your business -- you are personally responsible for all debts and obligations, and you keep all the profits. Unlike a limited company, there is no separate legal entity, no Companies House filing, and no requirement to prepare formal accounts to a particular standard.

To start as a sole trader, you simply register with HMRC for Self Assessment. You must do this by 5 October following the tax year in which you started trading. For example, if you start trading on 1 July 2025, you must register by 5 October 2025. Registration is free and can be done online through GOV.UK. You will receive a Unique Taxpayer Reference (UTR) number, which you use for all tax correspondence.

As a sole trader, you pay Income Tax on your business profits (revenue minus allowable expenses) and Class 2 and Class 4 National Insurance. For 2025/26, you pay: 20% Income Tax on profits from £12,571 to £50,270, 40% on profits from £50,271 to £125,140, and 45% on profits above £125,140. Class 4 NI is 6% on profits between £12,570 and £50,270, and 2% above £50,270. Class 2 NI is £3.45 per week if profits exceed £12,570.

The main advantages are simplicity and privacy. There is minimal paperwork, no public filing of accounts, and you can withdraw money from the business at any time without tax implications (since you are taxed on profits, not drawings). The main disadvantage is unlimited personal liability -- if the business owes money it cannot pay, creditors can pursue your personal assets including your home.

Step by Step

You trade under your own name or a business name (you do not need to register a business name, but you must include your real name on business correspondence). You keep records of all income and expenses, and at the end of each tax year (5 April), you calculate your profit by deducting allowable business expenses from your total income.

You report your profit on the self-employment pages of your Self Assessment tax return, which is due by 31 January following the tax year end (or 31 October if filing on paper). HMRC calculates your Income Tax and National Insurance based on your reported profit, and you pay the bill by 31 January. If your bill exceeds £1,000, you will also need to make payments on account.

From April 2026, sole traders with income over £50,000 will be subject to Making Tax Digital for Income Tax. This means you will need to keep digital records and submit quarterly updates to HMRC using compatible software, rather than filing a single annual return.

Practical Tips

Open a separate bank account for your business income and expenses even though it is not legally required -- it makes bookkeeping and tax returns much easier
Claim the full range of allowable expenses -- many sole traders miss home office costs, business mileage, and professional development
Set aside 25-30% of your profits in a separate savings account for your tax bill to avoid a cash flow shock at 31 January
Review your structure annually -- if profits are growing, model the tax difference between sole trader and limited company to see when incorporation makes sense

Common Mistakes to Avoid

Not registering with HMRC by 5 October in the tax year you start trading -- late registration can trigger penalties
Failing to keep adequate records of income and expenses -- HMRC requires you to keep records for at least five years after the 31 January submission deadline
Not claiming all allowable expenses, such as use of home as office, business mileage, professional subscriptions, and equipment
Remaining a sole trader when profits exceed £30,000-£35,000 and incorporation would be more tax-efficient

Frequently Asked Questions

What is the difference between a sole trader and self-employed?

They are effectively the same thing. 'Self-employed' describes your employment status, while 'sole trader' describes your business structure. A sole trader is self-employed, but a partner in a partnership is also self-employed without being a sole trader.

Do I need to register a business name?

No, you do not need to register a trading name. You can trade under any name you choose, but you must display your own name and address on all business correspondence, invoices, and your website. You cannot use 'Ltd', 'Limited', or 'PLC' in your trading name.

When should I switch from sole trader to limited company?

Generally when profits consistently exceed £30,000-£35,000 per year, incorporating becomes more tax-efficient. Other reasons include needing limited liability protection, wanting to bring in investors, or client requirements for working with a limited company.

Can I employ staff as a sole trader?

Yes, sole traders can employ staff. You will need to register as an employer with HMRC, run PAYE payroll, and comply with employment law. Being a sole trader does not prevent you from having employees.

What expenses can I claim as a sole trader?

You can claim any expense that is 'wholly and exclusively' for business purposes. This includes office supplies, travel, professional services, insurance, marketing, and a proportion of household costs if you work from home. HMRC's simplified expenses scheme offers flat-rate deductions for home use and vehicle costs.

Source: HMRC guidance on self-employment: https://www.gov.uk/set-up-sole-trader and Business Income Manual (BIM00000+): https://www.gov.uk/hmrc-internal-manuals/business-income-manual

Related Terms

Limited Company

A limited company is a business structure that's legally separate from its owners. Your personal assets are protected if the business fails.

Self Assessment

Self Assessment is the system HMRC uses to collect Income Tax from people who don't have all their tax deducted at source (via PAYE).

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