Income Tax Rates for UK Sole Traders 2025-26

Understanding how income tax works as a sole trader is the foundation of managing your finances well. Unlike employees, who have tax deducted automatically through PAYE, you are responsible for calculating and paying your own. This guide explains the 2025-26 rates and bands, the things that catch sole traders out — including the often-missed £100,000 threshold trap — and how to estimate what you owe before January arrives.

2025-26 income tax rates at a glance

Income tax is charged on your profit — your total income after deducting allowable business expenses. Not your turnover.

Band	Taxable profit	Rate
Personal Allowance	Up to £12,570	0%
Basic Rate	£12,571 to £50,270	20%
Higher Rate	£50,271 to £125,140	40%
Additional Rate	Over £125,140	45%

A note on Scotland: Scottish taxpayers pay different rates — the Scottish Government sets its own income tax bands and rates, which differ materially from the figures above. If you live in Scotland, check the Scottish rates on GOV.UK rather than using this table.

How the Personal Allowance works for sole traders

The Personal Allowance (£12,570 in 2025-26) is the amount you can earn tax-free each year. As a sole trader, it applies to your total income — self-employment profit, any employment income, and other sources combined.

If you are also employed: your employer uses your Personal Allowance against your salary first. If your salary already exceeds £12,570, your self-employment profit is taxed from the first pound. This catches many people doing both employed and freelance work by surprise — your effective tax position depends on all your income sources together, not each in isolation.

Understanding how your income tax and National Insurance for sole traders interact is important when estimating your total tax bill, since both are calculated on the same profit figure.

Understanding the tax bands: worked examples

Most sole traders operate entirely within the basic rate band. Once your profit exceeds £12,570, you pay 20% on everything up to £50,270.

Worked example — profit of £32,000:

• £12,570 — tax-free (Personal Allowance)
• £19,430 (£32,000 minus £12,570) × 20% = £3,886 income tax
• Plus Class 4 National Insurance: £19,430 × 6% = £1,165.80
• Approximate total: £5,052

Worked example — profit of £60,000:

• £12,570 — tax-free (Personal Allowance)
• £37,700 (£50,270 minus £12,570) × 20% = £7,540
• £9,730 (£60,000 minus £50,270) × 40% = £3,892
• Plus Class 4 National Insurance: £37,700 × 6% + £9,730 × 2% = £2,457
• Approximate total: £13,889

These are simplified illustrations — Class 2 National Insurance, payments on account, and any other income sources will affect your actual bill. For a detailed breakdown of your National Insurance liability, see National Insurance for UK sole traders: Class 2 and Class 4.

The Trading Allowance: a £1,000 tax break many sole traders miss

The Trading Allowance lets you earn up to £1,000 from self-employment tax-free each year, without needing to register for Self Assessment or keep detailed records.

If you are already registered for Self Assessment with higher profits, the Trading Allowance can be used instead of claiming actual business expenses — but only if your allowable expenses are below £1,000. For most sole traders with meaningful expenses, claiming actual expenses will be more beneficial.

When the Trading Allowance is most useful:

• You have a small amount of side income (online sales, occasional odd jobs)
• Your actual business expenses are below £1,000
• You want to simplify your return for a low-income year

Reducing your taxable profit by claiming allowable business expenses is one of the most effective ways to reduce your income tax bill as a sole trader — every pound of legitimate expense saves you 20p or 40p in tax depending on your rate.

The £100,000 trap: the 60% effective tax rate

This is the most important — and most under-explained — tax issue for higher-earning sole traders.

When your income exceeds £100,000, your Personal Allowance starts to be withdrawn: it reduces by £1 for every £2 you earn above £100,000. By the time your income reaches £125,140, your Personal Allowance is gone completely.

This creates an effective marginal tax rate of 60% on income between £100,000 and £125,140:

• You pay 40% income tax on each pound in that range
• Plus, losing £1 of Personal Allowance per £2 earned means an additional £0.40 of tax on the income that was previously sheltered by the allowance
• Combined: 40% on the new income + 20% on the recovered allowance = 60% effective marginal rate

If your profit is approaching £100,000, this is a serious planning issue. Options include:

• Pension contributions — deducted from adjusted net income, making them highly effective here
• Reviewing timing of income — if you can legitimately defer income across tax years, the window matters
• Speaking to an accountant — this is complex territory where professional advice pays for itself

How to estimate your tax bill during the year

You do not need to wait until January to know what you owe. The general approach if you do not use accounting software:

1. Total your profit to date (income minus allowable expenses)
2. Deduct your Personal Allowance (£12,570)
3. Apply the 20% basic rate — or 40% on anything above £50,270
4. Add your Class 4 National Insurance estimate (6% between £12,570 and £50,270, 2% above)

Understanding payment on account is equally important here: your January payment often includes not just the current year's bill but also an advance payment toward the following year. Planning ahead for both figures prevents the cash flow shock that catches many sole traders off guard.

The practical approach is to set aside 25–30% of every client payment from day one — adjusted upward toward 35–40% if you are approaching or above the higher rate threshold.

How Making Tax Digital affects your income tax picture

From April 2026, sole traders with qualifying income over £50,000 must file quarterly digital updates with HMRC under Making Tax Digital for Income Tax. This does not change the tax rates or the amounts you pay — it changes when HMRC receives information about your income.

One practical benefit: quarterly reporting gives you a more current picture of your tax position throughout the year, reducing the January surprise. Accounting software handles the submissions automatically as part of its standard workflow.

If you are not sure whether Making Tax Digital applies to your situation, the MTD eligibility checker takes about two minutes and tells you which phase you fall into.

The short version

Your income tax as a sole trader is calculated on profit — income after expenses — using the same bands as employees. Most sole traders pay 20% on profit above £12,570, plus Class 4 National Insurance. The two things most likely to catch you out are the payment on account system in January and, for higher earners, the effective 60% marginal rate between £100,000 and £125,140. The solution to both is the same: know your numbers throughout the year rather than reconstructing them at filing time.