Estimate your UK Self Assessment tax bill for 2026/27. See your Income Tax, dividend tax, National Insurance, balancing payment and possible payments on account.
Self Assessment is the system HMRC uses to collect Income Tax from individuals who are not fully taxed through PAYE. You may need to file a Self Assessment return if you are self-employed, have income from property, savings, investments, or other sources not taxed at source.
Your Self Assessment tax bill is calculated by adding up all your taxable income, deducting your Personal Allowance, then applying the relevant Income Tax bands. Dividend income is taxed at different rates, and self-employed income may also attract National Insurance.
A balancing payment is the amount of tax you owe after deducting any tax already paid through PAYE or other credits. If you have paid more than your liability, you may be due a refund.
Payments on account are advance payments towards your next year's Self Assessment tax bill. They are usually required if your tax liability (after tax deducted at source) is more than £1,000 and less than 80% of your income was taxed at source.
A first Self Assessment bill can appear higher because it may include both the balancing payment for the previous year and a payment on account for the following year. This is a common reason for surprise.
Yes. If tax has already been deducted from your employment income through PAYE, it reduces the amount you need to pay through Self Assessment. Enter your PAYE tax paid to see the balancing payment.
Self-employed individuals report their trading profit on their Self Assessment return. This calculator uses your self-employed profit to estimate Income Tax and Class 4 National Insurance.
Scotland has its own Income Tax bands. If you pay tax in Scotland, the calculator applies Scottish rates. The rest of the UK uses the standard 20%, 40% and 45% bands.
Illustrative example only: For self-employed profit of £45,000, savings of £500, dividends of £1,000, no PAYE, in England for 2026/27:
It's a tool that estimates your Self Assessment tax liability based on your income sources, tax already paid, and the applicable tax bands.
Your total taxable income is reduced by your Personal Allowance, then taxed progressively using the relevant Income Tax bands. Dividend and savings income may have different rates.
A balancing payment is the tax you owe after deducting any tax already paid through PAYE or other credits.
They are advance payments towards your next year's tax bill, usually required if your liability is above £1,000 and less than 80% of your income was taxed at source.
A first bill can include both the balancing payment for the previous year and a payment on account for the following year.
Yes. Tax already deducted through PAYE reduces the amount you need to pay through Self Assessment.
Yes, self-employed individuals generally pay Class 4 NI on their profits and may pay Class 2 NI, which are calculated as part of the Self Assessment tax bill.
Yes, dividend income is taxable and may be subject to different rates than other income. The calculator applies dividend tax rates separately.
Yes. Scotland has its own Income Tax bands. The calculator applies Scottish rates when Scotland is selected.
No. This is an independent estimate tool based on published HMRC rates. It is not affiliated with HMRC.