HMRC Self Assessment tax estimator. Calculate your approximate Income Tax, Class 4 National Insurance, and find out your estimated take-home pay in seconds.Note: This calculator uses the standard tax bands for England, Wales, and Northern Ireland. Scottish tax rates differ slightly.
Sole Trader Tax Calculator
Office, travel, equipment, etc.
Net Take Home Pay
After Tax & NI
How to use this Self Assessment Tax Calculator
If you are self-employed in the UK, you don’t receive a payslip with taxes deducted automatically (PAYE). Instead, you must file a Self Assessment tax return annually. This tool acts as a tax return estimator for self-employed professionals, helping you budget for your bill.
- Turnover (Revenue): Enter your total invoices or sales before any deductions.
- Allowable Expenses: Enter business costs (software, travel, equipment). HMRC taxes your profit, not your total income.
- Result: We calculate your estimated Income Tax and National Insurance (Class 4) to show your “Net Profit” (actual money in your pocket).
Note: This calculator assumes a standard tax scenario for the 2025/26 tax year. It does not account for student loan repayments, marriage allowance, or specific reliefs.
Freelance & Contractor Tax Explained
Whether you search for a freelance tax calculator or a contractors tax calculator, the tax rules for Sole Traders remain the same.
Unlike Limited Companies, where you might pay Corporation Tax and Dividend Tax, a Sole Trader pays tax on business profits via the personal tax system. This makes the sole trader tax calculator simpler: you get a Personal Allowance, and you pay standard Income Tax rates on the rest.
Pro Tip: If your expenses are low (under £1,000), you can use the Trading Allowance of £1,000 instead of itemising actual expenses.
How is tax calculated for self-employed? (2025/26 Rates)
To manually work out tax for self-employed, you must apply the following HMRC bands to your Net Profit (Turnover minus Expenses).
1. Income Tax Bands (England, Wales & Northern Ireland)
Most sole traders pay the Basic Rate (20%), but if your profits are higher, you will move into the Higher or Additional rate bands.
Please note: Scotland has its own income tax bands which are not covered in this specific calculation.
| Band | Taxable Income | Tax 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% |
2. National Insurance (Class 4)
Often overlooked in a standard salary calculator, Sole Traders must pay Class 4 NICs on profits. For the 2025/26 tax year, the rates are:
- Main Rate (6%): On profits between £12,570 and £50,270.
- Higher Rate (2%): On profits above £50,270.
Self Employed Take Home Pay Calculator
“Take home pay” usually refers to employees (PAYE). However, as a business owner, your “take home” is your Net Profit minus Tax and NI.
Using a self employed wage calculator is critical for cash flow. You should transfer your estimated tax bill into a separate savings account every month. If you don’t, you might face a difficult January when the HMRC payment deadline hits.
Frequently Asked Questions
How much is self-employment tax?
It depends entirely on your profits. You pay Income Tax (20%, 40%, or 45%) plus Class 4 National Insurance (6% or 2%) on profits above the relevant thresholds. Use the self employed tax calculator above for an estimation based on standard bands.
Do I need to pay Class 2 National Insurance?
The rules for Class 2 NI changed in April 2024. Currently:
- Profits above the Small Profits Threshold (£6,725): You do not need to pay Class 2 NI, but you are treated as having paid it. This protects your National Insurance record (for State Pension) automatically.
- Profits below £6,725: You can choose to pay Class 2 NI voluntarily to ensure you keep your entitlement to the State Pension and other benefits.
What are Payments on Account?
If your tax bill is over £1,000, HMRC will typically ask for “Payments on Account” for the following year. This means you pay 50% of your estimated next bill in January and 50% in July. Our sole trader calculator uk shows your liability for the current year only, so please be aware that your actual cash payment to HMRC might be higher if Payments on Account apply.
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