SA302 tax calculation: what it is and how to get it

An SA302 is your tax calculation from HMRC: a summary of your income and the tax due, worked out from the Self Assessment return you filed. You can get one for the last 4 years once the return has been sent, and you cannot print it until 72 hours after you submit. HMRC also gives you a separate tax year overview for any year.

Who needs one

You will only have an SA302 if you file a Self Assessment return. That covers the self-employed, but also public sector employees with income that is not taxed through payroll, such as rental profits or work done on the side. Whether an employee has to file at all is covered in Self Assessment for employees.

Most employees on PAYE never need the document. Their P60 shows pay and tax for the year. Ask whoever wants proof of income which document they accept.

You may need an SA302 when someone asks for proof of self-employed or other income. The example GOV.UK gives is applying for a mortgage when you are self-employed.

SA302 or tax year overview

The two documents are different. The tax calculation is your SA302. It shows the figures from your return. The tax year overview is a statement from HMRC covering a tax year. You can get an overview for any year, and you can still print it from your HMRC online account even if you used commercial software.

Check which one your mortgage provider wants, and whether it accepts documents you have printed yourself. GOV.UK says to confirm this before you print.

How to print it

If you filed through HMRC’s online service, log in to your HMRC online account, go to Self Assessment, then choose “More details about your Self Assessment returns and payments”. The tax calculation is available there once the 72 hours have passed.

If you or an accountant filed using commercial software, you need to print the calculation from that software. It may be called something else, such as a tax computation. If you have trouble printing it, contact the software company. The tax year overview can still be printed from your HMRC account.

HMRC suggests contacting it if you have any problem getting the documents.

Tax years and timing

The tax year runs from 6 April to 5 April the following year. Your SA302 for a year only exists once the return for that year is in, so file early if you know a mortgage application is coming. The deadlines for returns are on GOV.UK’s Self Assessment deadlines page. A personal tax account is the quickest way to see what HMRC holds for you, including past returns.

If you are on PAYE and also have a second income, see tax when you have two jobs before assuming you need a return.

Dates that affect when you can get one

For the 2025/26 tax year, which ended on 5 April 2026, GOV.UK gives these dates. You must tell HMRC by 5 October 2026 if you need to complete a return and have not sent one before. A paper return must reach HMRC by 31 October 2026. An online return and any tax owed are due by 11:59pm on 31 January 2027. If you want to pay a Self Assessment bill through your tax code, the online return has to be in by 30 December 2026.

Remember the 72-hour wait after you submit. A mortgage application that needs the document is better started with a return filed well before the deadline. Late filing carries penalties.

Checking your tax without an SA302

GOV.UK also offers other ways to see your tax position. If you are an employee, the Check your Income Tax service shows your tax code, estimated income and the tax you can expect to pay for the current year, and a separate service covers how much you paid in the previous year. You can also estimate what you should have paid without signing in.