What Is SA302? What It Shows and How to Get Yours

SA302 is the tax calculation HMRC produces after you file a Self Assessment tax return. It sets out how much you earned, from which sources, and how much tax you owe or have already paid. Most people only come across it when a mortgage lender asks for one, usually because their income doesn’t arrive on a standard payslip.

You can get a copy going back four tax years, either online or by post.

The reason SA302 catches people out is timing. Self-employed income doesn’t come with a P60 attached, so when a lender needs proof of earnings, HMRC’s own tax calculation becomes the substitute. Requesting it for the first time, under a mortgage deadline, is when most of the confusion happens.

It doesn’t help that HMRC no longer posts these out automatically. You have to know which button to press in your online account, or which number to call if you’d rather not go digital.

Usually, the form itself is straightforward enough once you know where to look and what it actually covers, and that’s what the rest of this guide walks through.

What Your SA302 Actually Shows

Formally, it’s an HMRC self assessment tax calculation document, though almost everyone just calls it your SA302, and some lenders’ paperwork even labels it a self assessment tax calculation certificate, adding to the confusion.

Your SA302 tax calculation pulls directly from the figures you put on your SA100 tax return, so it’s only ever as accurate as what you declared.

For an SA302 example, an SA302 tax calculation form has two sections worth knowing about. The first is the tax calculation itself, a breakdown of every income source and how HMRC arrived at your final bill.

The second is a shorter tax summary, showing what’s due, what’s been paid, and what’s still outstanding.

A typical calculation draws on several income types together, not just self-employment income on its own:

• Self-employment profit counts what your business or freelance work earned after allowable expenses.
• PAYE income covers any salary or wages taxed at source, if you also hold a job alongside self-employment.
• Dividends include payments from companies you hold shares in, including your own limited company.
• Rental income reflects profit from any property you let out, after allowable costs.
• Pension income covers payments from a private or workplace pension.

Because it’s an SA302 form UK lenders already recognise, it’s rarely questioned once it’s printed or downloaded correctly.

The format carries its own authority, in the way a payslip does for an employed applicant.

You can access an SA302 last 4 tax years back through your online account, though most lenders only ever ask for the two or three most recent. It’s this consistency that makes the SA302 mortgage application process relatively painless once you know what to expect.

Why Mortgage Lenders Ask to See It

Employed applicants prove their income with payslips and a P60. Self-employed applicants and company directors don’t have either, so lenders need something that’s been independently checked, not just a set of accounts the applicant put together.

That’s the appeal of using HMRC’s own figures. GOV.UK publishes a list of mortgage providers and lenders who’ll accept a self-printed tax calculation and tax year overview, which is part of why the document carries more weight than accounts alone.

It isn’t only mortgages, either. The same document sometimes gets asked for in a few other situations:

• Business loan applications sometimes require it, since lenders assess income before approving finance the same way.
• Some visa applications ask for it as evidence of UK income.
• Rental references occasionally include it, alongside standard letting-agent checks.

Whatever the reason, the underlying logic is the same: it’s the one document a self-employed person can produce that HMRC has already checked.

SA302 vs Tax Year Overview: What’s the Difference

Lenders often ask for SA302 and tax year overview together, and it’s easy to assume they’re duplicates. They’re not.

The difference between SA302 and tax year overview comes down to detail. Your SA302 tax calculation shows the full breakdown: every income source, every allowance, how the final bill was worked out.

Your tax year overview is shorter: it only confirms the total due, what’s been paid, and whether HMRC has processed the return.

Some guides use SA302 tax overview as a loose shorthand for the pair, though HMRC treats them as two separate documents, each downloaded separately from the same online account.

Lenders typically want both because one proves what you earned, and the other proves HMRC has actually received and accepted the return, not just that you filled a form in.

You can get a copy of your tax year overview from the same HMRC online account, or from third-party accountancy software if your return was filed that way.

Getting a Copy Online

If you’re wondering how to get SA302 form from HMRC without picking up the phone, SA302 online is the quickest route. Most people have theirs within minutes once the return has been processed.

To get SA302 HMRC online account access, follow these steps:

• Sign in to your HMRC online account, also called your personal tax account, using your Government Gateway ID and password.
• Go to the Self Assessment section of your account, scrolling down if you’re on the main dashboard.
• Select the tax year you need under your tax return options.
• Choose the option to view your calculation for that year.
• Print SA302 form copies directly from the screen, or save the page as a PDF to download SA302 form documents for a lender or accountant.

It’s normally available around 72 hours after HMRC receives and processes your return. GOV.UK confirms you can’t print anything before that point, so it isn’t instant if you’ve only just filed. If you can’t see it yet, that delay is the most common reason, not a fault with your account.

One exception is worth knowing: if your return was filed through commercial software rather than directly on HMRC’s own website, the online SA302 view won’t be there at all.

In that case, the software itself, or an accountant if one filed on your behalf, produces the equivalent calculation instead.

Your tax year overview isn’t affected by this, though. It stays available through your personal tax account regardless of how the return was filed, so it’s worth downloading alongside the software calculation as extra proof that HMRC has actually processed the return.

That timing is also worth bearing in mind alongside the wider Self Assessment deadlines each year. Filing early gives you breathing room on both fronts.

How to Get SA302 by Post

Not everyone files online, and not everyone wants to. If your return went in by post, or you’d simply rather have a paper copy sent to you, you can request SA302 from HMRC by phone instead.

Call HMRC on 0300 200 3310 and ask them to post a copy. They’ll ask for your ten-digit UTR number and National Insurance number as part of their security checks, so have both to hand before you dial.

Expect it to take a while: the postal turnaround is about two weeks, and it can run longer during busy periods, so it’s worth requesting well ahead of any lender deadline rather than waiting until the last minute.

If you’d rather have an accountant handle your Self Assessment altogether, this step usually isn’t necessary. They can produce the equivalent calculation directly through their own software.

Who Actually Needs One (and Who Doesn’t)

Not everyone who fills in a Self Assessment return will be asked for one.

If you’re employed full-time and only file a return for a minor reason (some savings interest, say, or a small side income already declared elsewhere), a lender is unlikely to ask for an SA302 for mortgage purposes on top of your payslips.

SA302 self employed requests are the norm, though. It’s largely down to these groups:

• Sole traders and freelancers rely on it because their entire income comes from self-employment.
• Company directors often need it when paid partly or wholly through dividends rather than a standard salary.
• Landlords may be asked for it when rental profit makes up a meaningful share of declared income.
• Anyone with mixed income, combining PAYE with self-employment, dividends, or rental profit, will likely need one too.

For any of these, it remains the standard proof of income self employed UK applicants can offer instead of payslips, and it’s usually the first thing a broker will ask for once a self-employed mortgage application gets underway.

If Your SA302 Figures Look Wrong

Occasionally the figures on your SA302 don’t match what you expected, usually because of a mistake on the original return rather than an HMRC error.

GOV.UK’s guide to understanding your Self Assessment tax bill is a good place to check where a mismatch might have come from before you contact anyone.

If something looks off, the fix depends on who filed the return:

• An accountant-filed return is best flagged with them first, since they can usually explain or correct it faster than HMRC can.
• A self-filed return means contacting HMRC directly, or submitting an amended return if the error is yours.
• An unallocated payment at HMRC’s end can throw off your tax summary even when the calculation itself is correct.

Once a correction goes through, HMRC generates a new SA302 certificate automatically. There’s no separate form to request. Just allow time for the updated version to appear online before sending it to a lender, since mismatched figures tend to slow an application down more than a short wait would.

Before You Apply for a Mortgage

Getting an SA302 for self employed mortgage applicants doesn’t need to be stressful once you know the two routes: quick and online, or slower by post.

The online option is usually available within 72 hours of filing and takes minutes to download; the postal route takes about two weeks, so it’s worth requesting early if a lender deadline is looming.

Keep a copy of both your SA302 and tax year overview together each year, rather than hunting for them under pressure later. HMRC only holds records back four tax years, so anything older won’t be available through the usual routes.

If the figures ever look wrong, sort it with an accountant or HMRC before sending anything to a lender. A corrected version takes far less time than a rejected application.

Key Takeaways

Here’s the short version, if you’re pressed for time:

• SA302 is HMRC’s official Self Assessment tax calculation, built from the figures on your tax return.
• It’s used mainly as proof of income for mortgages, though loans, some visas, and rental references sometimes ask for it too.
• You can access up to four tax years online, usually within 72 hours of HMRC processing your return.
• Requesting a copy by post takes about two weeks, so it pays to plan ahead.
• Lenders usually want it alongside a tax year overview, since one shows what you earned and the other confirms HMRC has processed the return.

If the figures look wrong, an accountant or HMRC can correct the underlying return, which generates an updated SA302 automatically.