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Millions of taxpayers filed their Self Assessment tax return for the 2024 to 2025 tax year by the deadline.

• Updated: 3 February 2026

Understand your Self Assessment tax bill - your tax calculation, statement, balancing payments, payments on account.

• Overview

  When you submit a Self Assessment tax return, you’ll get a: Self…

• Self Assessment statement

  Your Self Assessment statement shows: the tax you owe at the time the…

• Tax calculation (SA302)

  Your tax calculation (SA302) shows: your total income on which tax is due…

• Payments on account

  ‘Payments on account’ are payments towards your next tax bill (including…

Check how the government calculates and spends your Income Tax and National Insurance contributions within your Annual Tax Summary.

• Updated: 13 February 2024

Find out whether you need to pay UK tax on foreign income - residence and ‘non-dom’ status, tax returns, claiming relief if you’re taxed twice (including certificates of residence)

Self Assessment tax returns - deadlines, who must send a tax return, penalties, corrections and returns for someone who has died.

Use HM Revenue and Customs’ (HMRC) tax checker to get an estimate of how much Income Tax you should have paid in a previous tax year.

If you’ve missed Self Assessment deadlines get an estimate of how much you’ll need to pay in penalties and interest

Personal Allowance, Income Tax rates, bands and thresholds.

What to do if you need to pay more tax or you're due a refund, including P800 tax calculations from HM Revenue and Customs (HMRC).

Check how much Income Tax you paid to HM Revenue and Customs (HMRC) last year. Check your P800.