How much tax do self employed pay?

The amount depends on your profits. You pay 0% on the first £12,570, 20% on profits from £12,571 to £50,270, and 40% on profits from £50,271 to £125,140. You also pay Class 4 National Insurance on profits above the threshold.

What is the self employed tax rate?

The Income Tax rates are the same as for employees: 20% basic rate, 40% higher rate, and 45% additional rate. Your Personal Allowance is deducted from your profits before tax is calculated.

How much can I earn before paying tax?

You can earn up to the Personal Allowance before paying Income Tax. However, you must register as self-employed and file a Self Assessment return if your self-employment income exceeds £1,000.

What expenses can I claim?

You can claim office costs, travel, equipment, professional fees, business insurance, and home office costs. Only genuine business expenses are allowable.

How much tax does a sole trader pay?

A sole trader pays Income Tax on profits after deducting expenses and the Personal Allowance. The rates are 20% on profits up to £50,270, 40% on profits from £50,271 to £125,140, and 45% above that. National Insurance is also payable.

When do I need to file a tax return?

If you are self-employed and your income exceeds £1,000, you must file a Self Assessment tax return. The deadline for online filing is 31 January following the end of the tax year.

Self Employed Tax: The Complete UK Guide for 2026

Self employed tax explained. Learn how income tax and National Insurance work for sole traders, what you can claim as expenses, and how to file your Self Assessment.

Working for yourself brings freedom and flexibility, but it also brings tax responsibilities. Unlike employees who have tax deducted automatically through PAYE, self-employed individuals must calculate and pay their own tax through the Self Assessment system. Understanding how self employed tax works is essential to avoid surprises and stay on the right side of HMRC.

This guide explains everything you need to know about self employed tax in the UK. It covers how income tax and National Insurance work for sole traders, what you can claim as expenses, how to register and file your Self Assessment return, and what to do if you cannot pay your tax bill.

For a full understanding of the UK tax system, our UK tax brackets guide explains the rate structure. If you are considering multiple income sources, our second job tax guide covers employed and self-employed income together. For understanding how tax codes work if you have a PAYE job alongside self-employment, our UK tax codes guide provides a full breakdown.

Self employed individuals pay Income Tax and National Insurance on their trading profits through Self Assessment. The Personal Allowance applies to your total income, and you can deduct allowable business expenses to reduce your tax bill.

How Does Self Employed Tax Work

When you are self-employed, you pay tax on your trading profits. Your trading profit is your total business income minus allowable business expenses. You are taxed on your profits, not your total income.

You pay Income Tax and National Insurance through the Self Assessment system. This means you are responsible for calculating your own tax liability and paying it directly to HMRC.

Your tax bill is calculated on your total income from all sources, not just your self-employment profits. If you have other income such as employment, savings interest, or dividends, these are added to your trading profits to determine your overall tax position.

According to IPSE, sole traders must register with HMRC and file for self-assessment if they earn more than £1,000 per tax year.

For a deeper understanding of how additional income is taxed, our marginal tax rate guide explains the impact of extra earnings on your overall tax position. Our adjusted net income guide explains how your total income is calculated for tax purposes.

Self employed tax is calculated on your trading profits after deducting allowable expenses. You are responsible for calculating your own tax and paying it through Self Assessment.

Registering as Self Employed

If you earn more than £1,000 from self-employment in a tax year, you must register with HMRC as self-employed and file a Self Assessment tax return.

Registering as self-employed is straightforward. You can do it online through the GOV.UK website. You will need your National Insurance number and details about your business. Once registered, HMRC will send you a Unique Taxpayer Reference which you will use for all future tax correspondence.

You must register by 5 October following the end of the tax year in which you started self-employment. For example, if you started trading in the 2025/26 tax year, you must register by 5 October 2026.

If you have a limited company, the rules are different. You must register with Companies House and pay Corporation Tax on your company profits rather than Income Tax on your personal earnings.

Our Self Assessment complete guide covers the registration and filing process in detail.

You must register as self-employed with HMRC if you earn more than £1,000 from self-employment in a tax year. Registration must be completed by 5 October following the tax year.

How Much Can You Earn Before Paying Tax

You can earn up to the Personal Allowance without paying Income Tax. At the time of writing, the Personal Allowance is £12,570. This is the amount you can earn before paying any income tax.

However, your Personal Allowance is shared across all your income sources. If you also have employment income, the allowance is usually allocated to that first. Any remaining allowance can be used against your self-employment profits.

If your total income from all sources is below £12,570, you will not pay any Income Tax. However, you may still need to file a Self Assessment return if your self-employment income exceeds £1,000.

Depending on your circumstances, the £1,000 trading allowance may reduce or eliminate the need to pay tax on small amounts of self-employment income.

For a deeper understanding of how the Personal Allowance works, our personal allowance guide explains the rules in full.

You can earn up to the Personal Allowance before paying Income Tax. Depending on your circumstances, the trading allowance may reduce or eliminate tax on small amounts of self-employment income.

Self Employed Tax Rates and Examples

Income Tax rates for self-employed individuals are the same as for employees, but self-employed individuals also pay National Insurance through Self Assessment. You pay tax on your taxable profits after deducting your Personal Allowance and allowable expenses.

At the time of writing, the income tax rates for England, Wales, and Northern Ireland are:

Personal Allowance: 0% on income up to £12,570
Basic Rate: 20% on income from £12,571 to £50,270
Higher Rate: 40% on income from £50,271 to £125,140
Additional Rate: 45% on income above £125,140

These rates apply to your taxable profits after deducting your Personal Allowance. Here are some examples of how the tax calculation works for a sole trader.

Example 1: Profits of £20,000

Personal Allowance: £12,570
Taxable profit: £20,000 - £12,570 = £7,430
Income Tax: £7,430 × 20% = £1,486

Example 2: Profits of £35,000

Personal Allowance: £12,570
Taxable profit: £35,000 - £12,570 = £22,430
Income Tax: £22,430 × 20% = £4,486

Example 3: Profits of £60,000

Personal Allowance: £12,570
Taxable profit: £60,000 - £12,570 = £47,430
Basic rate portion: £37,700 × 20% = £7,540
Higher rate portion: £9,730 × 40% = £3,892
Total Income Tax: £11,432

Your effective tax rate depends on your total income. For example, someone with profits of £35,000 pays £4,486 in Income Tax, which is an effective rate of approximately 12.8% of their gross profits, even though their marginal rate is 20%.

For a more detailed look at marginal rates, our marginal tax rate guide explains how additional income is taxed. Our income tax calculator can help you estimate your tax liability.

Income Tax rates are the same as for employees, but self-employed individuals also pay National Insurance through Self Assessment. The basic rate is 20%, higher rate is 40%, and additional rate is 45%.

National Insurance for the Self Employed

Self-employed individuals pay two types of National Insurance: Class 2 and Class 4. These contributions are collected through the Self Assessment system.

Class 2 National Insurance was abolished from April 2024 for those with profits above the Small Profits Threshold. However, the self-employed can still make voluntary payments to protect their State Pension record.

At the time of writing, self-employed individuals with profits above the Small Profits Threshold receive National Insurance credits without paying mandatory Class 2 contributions.

Class 4 National Insurance is payable on your trading profits above the threshold. At the time of writing, Class 4 contributions are:

6% on profits between £12,570 and £50,270
2% on profits above £50,270

According to MoneyHelper, for profits of £55,000, you would pay nothing on the first £12,570, 6% on the next £37,700, and 2% on the final £4,730.

Voluntary Class 2 contributions help protect your State Pension entitlement. According to Simply Business, doing so means you will continue to get full access to entitlements such as state pension, maternity allowance, and benefits.

Our National Insurance calculator can help you estimate your contributions, and our National Insurance explained guide covers the full rules.

Self-employed individuals pay Class 4 National Insurance on profits above the threshold. Class 2 contributions are voluntary for most, but protect your State Pension record.

Allowable Expenses for Self Employed Individuals

You can deduct allowable business expenses from your income before calculating your tax. This reduces your taxable profit and your tax bill.

Common allowable expenses include:

Office costs such as stationery and phone bills
Travel costs for business purposes
Equipment and tools
Costs of goods sold
Professional fees for accountants and solicitors
Business insurance
Home office costs if you work from home
Training courses

If your business expenses are higher than £1,000, you are generally better off deducting your actual expenses rather than claiming the £1,000 trading allowance.

For working from home, you can claim a proportion of your household bills based on the space used for business. This is calculated using the simplified expenses flat rate or by working out the actual proportion of your home used for business.

Our working from home tax relief guide covers home office claims in detail, and our salary sacrifice guide explains alternative ways to structure your income tax-efficiently.

You can deduct allowable business expenses from your income before calculating tax. Common expenses include office costs, travel, equipment, and professional fees.

Self Assessment Tax Returns

Self-employed individuals must file a Self Assessment tax return each year. The return covers your income from all sources, including self-employment, employment, savings, and investments.

According to HMRC guidance, if you are self-employed, you will need to complete the self-employment section of your online Self Assessment tax return. This includes entering your turnover, claiming the trading income allowance, and declaring your expenses.

The deadlines for Self Assessment are:

31 October: Paper tax return deadline
31 January: Online tax return deadline and payment deadline

You can file your return online through the HMRC website. You will need your Unique Taxpayer Reference and Government Gateway account.

When completing your return, you will need to report your total income, claim allowable expenses, and calculate your taxable profit. The system will then calculate your Income Tax and National Insurance liability.

If you miss the deadline, you may face penalties. Filing early gives you more time to budget for your tax bill.

Our Self Assessment complete guide covers the filing process step by step.

Self Assessment returns are due by 31 January each year. You need to report your turnover, expenses, and taxable profit. The system calculates your Income Tax and National Insurance.

Paying Self Employed Tax

Your Self Assessment tax bill is usually due by 31 January following the end of the tax year. If your bill is over £1,000, you may also need to make payments on account for the following year.

Payments on account are advance payments towards next year's tax bill. You will need to make two payments on account each year, one by 31 January and one by 31 July. Each payment is half of your previous year's tax bill.

If your tax bill is under £1,000 or if more than 80% of your tax is collected at source, you may not need to make payments on account.

You can pay your Self Assessment tax bill online through your Personal Tax Account, by bank transfer, Direct Debit, or by cheque. Always check the official GOV.UK website for the latest HMRC bank details and payment methods.

If you cannot pay your tax bill in full, you may be able to set up a Time to Pay arrangement with HMRC. For bills up to £30,000, you can set this up online without contacting HMRC directly.

Our how to pay HMRC online guide covers the payment process in detail.

Self Assessment tax is usually due by 31 January. If your bill exceeds £1,000, you may need to make payments on account. A Time to Pay arrangement can spread the cost if you cannot pay in full.

Common Self Employed Tax Mistakes

Several common mistakes can lead to overpaying tax, underpaying tax, or penalties from HMRC.

Missing tax deadlines – If you miss the 31 January filing and payment deadline, you will face penalties and interest. Filing and paying on time avoids unnecessary costs.

Underreporting income – HMRC receives data from banks, payment providers, and other sources. Failing to report all income may lead to HMRC enquiries, assessments, penalties, or interest charges.

Incorrect expense claims – Only genuine business expenses can be claimed. Personal expenses cannot be deducted. According to HMRC, you must be able to justify all expenses claimed.

Poor record keeping – You must keep records of all income and expenses for at least five years. Without proper records, you cannot substantiate your claims.

Late self assessment filing – Even if you do not owe tax, you must file your return on time. Late filing penalties start at £100 and increase over time.

Our tax refund guide explains how to claim money back if you have overpaid.

Common mistakes include missing deadlines, underreporting income, claiming personal expenses, and poor record keeping. Keep accurate records and file on time to avoid penalties.

Final Thoughts

Self employed tax can seem complicated, but understanding the basics helps you plan effectively and avoid surprises. You pay Income Tax and National Insurance on your trading profits through the Self Assessment system. Your Personal Allowance applies to your total income, and you can deduct allowable business expenses to reduce your tax bill.

The key to successful self employed tax management is keeping accurate records, claiming all legitimate expenses, and filing your return on time. Missing deadlines can result in penalties and interest charges.

If you are just starting out, the trading allowance may reduce or eliminate the need to pay tax on small amounts of self-employment income, depending on your circumstances. However, once your income exceeds £1,000, you must register with HMRC and file a Self Assessment return.

All information in this guide is based on official HMRC and GOV.UK sources. Readers should verify current rates and allowances directly with HMRC before making financial decisions, as rules may change after publication.