Add your turnover
Enter business income before deducting costs.
← All calculatorsSELF-EMPLOYED TAX CALCULATOR
Estimate your self-employed tax
Get an indicative view of Income Tax and National Insurance on your self-employed profit.
HOW THIS CALCULATOR WORKS
A useful estimate starts with the right inputs.
This calculator starts with turnover, deducts allowable business expenses and estimates Income Tax and self-employed National Insurance on the resulting profit. Other taxable income and pension contributions can materially change the result.
Deduct allowable expenses
Include only costs incurred wholly and exclusively for the business, subject to tax rules.
Review tax and take-home
Use the breakdown to plan cash flow and payments on account.
UNDERSTAND YOUR RESULT
What the numbers are telling you.
Taxable profit
Turnover less the expenses included in the estimate.
Income Tax and NI
Indicative liabilities for the selected year, before any unsupported reliefs or adjustments.
Estimated take-home
Profit remaining after the estimated tax and National Insurance shown.
BEFORE YOU ACT
Important points the headline number cannot decide.
- ✓Payments on account may bring forward part of next year's bill
- ✓Not every business cost is tax-deductible
- ✓Trading losses need separate treatment
- ✓Scottish Income Tax bands can change the result
SELF ASSESSMENT SUPPORT
Get tax-return help →Turn the estimate into a correctly filed return.
Get help checking expenses, completing your Self Assessment and understanding what to pay and when.
COMMON QUESTIONS
What to know before relying on the estimate.
Should I enter turnover or profit?+
Enter turnover in the income field and allowable expenses separately. The calculator derives an estimated taxable profit.
Does this include payments on account?+
The core tax estimate should be separate. A production result may show payments on account as an additional cash-flow figure, with the assumptions explained.
Is this calculation tax advice?+
No. It is an indicative estimate based on the information entered and the rules configured for the selected tax year. Your final position can change because of other income, reliefs, benefits, residence status and personal circumstances.
NEED CERTAINTY?
Speak to a tax expert →Make the next decision with confidence.
A vetted tax professional can check the assumptions and help you act on the result.