Understand your Self Assessment tax bill
Tax calculation (SA302)
Your tax calculation (SA302) shows:
- your total income on which tax is due
- any allowances and relief you have
- the total amount you owe for the tax year
- how HM Revenue and Customs (HMRC) has worked out the amount you owe
It does not include any:
- payments on account you have made
- payments you have made into a Budget Payment Plan
- other outstanding amounts (such as unpaid tax or penalties)
When you’ll get your tax calculation
You’ll get a calculation when you’ve filed your tax return or if the amount you owe changes. If you filed online, you can view this:
- before submitting – when you’ve finished filling in your return (but before submitting it) in the ‘View your calculation’ section
- after submitting – this can take up to 72 hours after you’ve submitted your return to show in your account
If you filed a paper return, HMRC will send your calculation by post.
If you made payments on account last year
You’ll need to deduct any payments on account you made last year from your tax calculation to work out how much tax you owe.
Requesting a tax calculation
Find out how to get a tax calculation SA302, for example if you’re applying for a mortgage or if you need one on HMRC header paper.