How to get your SA302 tax calculation and tax year overview from HMRC, why mortgage lenders want both, and what to do if you filed using software.
Applying for a mortgage when you work for yourself has one awkward moment built into it. The lender asks for proof of income, you say you are self-employed, and they ask for your SA302.
Nobody ever explains what that is before you need it. So here is the whole thing: what an SA302 actually shows, how to get one out of HMRC in about four minutes, why your lender almost certainly wants a second document alongside it, and what to do if your accountant filed the return with software and HMRC will not give you one.
It is HMRC’s own summary of the income you declared for a single tax year and the tax that comes out of it.
That is genuinely all it is. One page per tax year, headed “Tax calculation”, showing your income by source, your allowances, and the income tax and National Insurance due. The name SA302 comes from the old paper form number, and HMRC still uses it on the SA302 guidance page, even though what you actually download now is titled a tax calculation.
Lenders want it because a sole trader has no payslips and no P60. There is no employer to confirm anything. The SA302 is the nearest thing to an official, third-party statement of what a self-employed person earned, which is why it sits at the centre of nearly every self-employed mortgage application in the UK.
Take Danny, a self-employed plumber in Leeds, applying for a mortgage in September 2026. He filed his 2025/26 return in July and declared £41,000 of profit after expenses.
His SA302 for 2025/26 shows:
The underwriter is not really reading the tax figure. They are reading the £41,000. That, and the equivalent line from the year before, is what the affordability multiple gets applied to.
This is the part that catches people out. If you have spent three years claiming every allowable expense to keep your tax bill down, your declared profit is low, and your borrowing capacity is low with it. Most lenders want two or three consecutive years and will either average them or, if income is falling, use the most recent and lowest year. Here is what I would check first: pull your last three SA302s before you speak to a broker, so you already know the number they are going to work from.
If you filed through HMRC’s own online service, the self-serve route takes a few minutes:
Two timing rules matter. You can get an SA302 for the last four tax years, so in September 2026 that means 2022/23 through 2025/26. And you cannot print anything until 72 hours after you submitted the return. If you are filing late specifically to support a mortgage application, build those three days into your timeline rather than discovering them on a Friday afternoon.
If the online route fails, the Self Assessment helpline is 0300 200 3310, open Monday to Friday, 8am to 6pm. Posted copies take time, so ring early rather than as a last resort.
This is the step most people miss, and it is the single most common reason a self-employed mortgage application gets bounced back for more paperwork.
The SA302 shows what you declared. The tax year overview shows what HMRC recorded and received. They come from the same part of your HMRC account, and an underwriter reads them as a pair:
On its own, a tax calculation is a document you printed at home. Paired with an overview that matches it, the two corroborate each other. That is the whole reason lenders ask for a pair instead of a single page.
It also means an unpaid balance is visible. If you are sitting on an overdue payment on account, the overview will show it, and some lenders will treat it as a red flag. Clearing it before you apply is usually worth more than arguing about it later.
One useful difference: you can pull a tax year overview for any year, not just the last four. So if a lender asks for something older than four years back, the overview can still cover it even when the calculation cannot.
This is the most common snag, and the answer surprises people: HMRC generally will not issue an SA302 for a return submitted through third-party software. You print the tax calculation from the software instead. It may be labelled tax computation rather than SA302, which is the same document under a different name.
You can still download the tax year overview from your HMRC account, and that pairing is exactly what lenders expect. If the software will not produce it, contact the software company rather than HMRC.
Paper filers do not get the self-serve download at all. You will need to ring HMRC and ask for the calculation to be sent out, which is slow. If a mortgage is anywhere on your horizon, filing online is worth the switch for this reason alone.
Most will. HMRC maintains a published list of mortgage providers and lenders who accept a self-printed SA302 and tax year overview, and it covers nearly every major UK name, including Barclays, Halifax, HSBC, Lloyds, Nationwide, NatWest, Santander, Skipton, TSB and Virgin Money.
Worth knowing: that list was last updated in June 2020. Treat it as a strong indication rather than a guarantee, and confirm with your specific lender or broker before you assume.
The process itself has not changed. Four years of history, 72-hour wait after filing, same two documents.
What is changing around it is Making Tax Digital for Income Tax, which began phasing in from April 2026 for self-employed people and landlords with qualifying income above £50,000. Those in scope now keep digital records and send quarterly updates instead of filing one annual return in the old format.
The practical question for a mortgage is what your lender wants as proof once the annual return looks different. For now, the final declaration still produces a tax calculation, and the tax year overview is unchanged. If you are inside MTD and applying this year, tell your broker early so they can check how that lender handles it rather than finding out at underwriting.
One thing that has not moved: the 31 January deadline. If you are applying for a mortgage in the first weeks of February and your most recent return went in at the last minute, remember the 72-hour rule before you promise anyone a document.
If you want to see what your self-employed profit actually leaves you with each month, after income tax, National Insurance and payments on account, the NetPay app tracks it as you earn rather than at the end of the year. Free to download.
Sources: Get your SA302 tax calculation (GOV.UK), Mortgage providers and lenders who accept a SA302 tax calculation and a tax year overview (GOV.UK), Self Assessment: general enquiries (GOV.UK).
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An SA302 is HMRC's summary of the income you declared and the tax you owe for one tax year. Lenders ask self-employed applicants for it because a sole trader has no payslips or P60. It is the closest thing HMRC issues to official proof of self-employed earnings, which is why most UK lenders build their affordability checks around it.
Sign in to your HMRC online account, go to Self Assessment, then More details about your Self Assessment returns and payments. You can print the tax calculation for the last four tax years. You cannot print anything until 72 hours after you submitted the return, so leave a few days between filing and applying.
No, and lenders usually want both. The SA302 shows what you declared and what the tax on it comes to. The tax year overview shows what HMRC actually recorded and whether it was paid. Together they prove the figures are real and that you are not in arrears, which is what an underwriter is checking.
Not from HMRC in most cases. If the return was submitted through commercial software, you print the tax calculation from that software instead, where it may be labelled tax computation. You can still download the tax year overview from your HMRC account, and lenders will accept the software calculation paired with it.
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A note on financial advice: NetPay UK calculates take-home pay based on official HMRC tax rules. This article reflects rules in force at the time of publication (21 September 2026). Tax rules change. For complex situations, consult a qualified UK accountant or visit gov.uk/income-tax.
