What is an SA302?

If you’re self-employed and applying for a mortgage, you may be asked to provide an SA302. This is a common part of the mortgage process for sole traders, freelancers, contractors and some company directors.

An SA302 helps mortgage lenders understand the income you’ve declared through Self Assessment. But it doesn’t work on its own. Lenders usually look at it alongside other documents, such as tax year overviews, accounts and bank statements.

Here’s what an SA302 is, why lenders ask for it, and what to watch out for before applying for a mortgage.

What is an SA302?

An SA302 is an HMRC tax calculation.

It shows the total income on which tax is due, any allowances and reliefs, the total amount owed for the tax year and how HMRC has worked out that amount.

In simple terms, it’s the tax calculation produced from your Self Assessment return.

For self-employed mortgage applicants, an SA302 calculation is often used as proof of declared income. This can be especially important if you don’t have payslips in the same way an employed applicant would.

You may need an SA302 if you’re:

• A sole trader
• In a partnership
• A freelancer
• A contractor
• A limited company director who completes Self Assessment
• Someone with income from several sources

Not every lender asks for the same documents, but SA302s are a common request in a self-employed mortgage application.

Why do mortgage lenders ask for an SA302?

Mortgage lenders need to check whether your income is reliable enough to support the mortgage you want.

For employed applicants, lenders usually look at payslips and P60s. For self-employed applicants, income can be more complex. It may change from year to year, come from different sources, or depend on business profits.

An SA302 calculation helps lenders verify what income has been declared to HMRC.

For regulated mortgages, FCA income-evidence rules require lenders to obtain evidence for the income they use when assessing affordability. The evidence must be suitable for the type and period of income being assessed.

They may use it to check:

• How much income you declared for the tax year
• Whether your income is stable or changing
• Whether your tax documents match your accounts
• Whether your income supports the mortgage amount requested
• Whether there are any obvious inconsistencies in the application

An SA302 is usually only one part of the wider checks. A lender may also ask for accounts, tax year overviews, business bank statements, personal bank statements and other self-employed mortgage documents.

If you’re still working out what you might be able to borrow, a self-employed mortgage calculator can help you get a rough estimate before speaking to a broker.

What does an SA302 show?

An SA302 tax calculation usually shows key information from your Self Assessment return.

This may include:

• Your income for the tax year
• Your self-employed profit or earnings
• Other income declared through Self Assessment
• Taxable income
• Tax due
• National Insurance contributions, where relevant
• The final tax calculation for that year

The important point is that lenders are usually interested in the income they can verify.

For example, if you’re a sole trader and your business turns over £80,000 but the profit shown in your tax calculation is £45,000, a lender may use the £45,000 figure rather than the turnover, depending on its criteria.

This is one of the reasons self-employed applicants can sometimes feel their borrowing power is lower than expected.

SA302 vs tax year overview: What’s the difference?

An SA302 and tax year overview are related, but they aren’t the same document.

The SA302 is your tax calculation. A tax year overview is a separate HMRC summary for that tax year.

Mortgage lenders may ask for both as part of the evidence supporting your self-employed income.

In simple terms:

• The SA302 shows the tax calculation
• The tax year overview provides a separate HMRC overview for that year

Exactly what you need depends on the lender and how your income is being evidenced.

How do you get an SA302?

If you use HMRC’s online services for Self Assessment, you can print your tax calculation and tax year overview from your HMRC online account.

If you or your accountant use commercial software to submit the return, the tax calculation can be printed from that software and may be called something different, such as a “tax computation”. You can still print the tax year overview from your HMRC online account.

HMRC currently allows you to obtain SA302 evidence for the last four years, but you should still check which documents and years your mortgage provider requires.

Common SA302 issues when applying for a mortgage

SA302s are useful, but they can also raise questions during a mortgage application.

Your latest tax return may not show immediately

If you’ve only recently submitted your tax return, there can be a short delay. HMRC says you cannot print the documents until 72 hours after sending your tax return, and your tax calculation may be unavailable to view for up to 72 hours after submission.

This can be a problem if you’re trying to apply for a mortgage quickly and the lender wants the latest tax year included.

The figures may not match what you expected

Many self-employed people think about income in terms of turnover, invoices paid or money coming into the business.

Lenders can assess income differently depending on how you trade. They may use sole-trader profit, salary and dividends, or company net profit, depending on the lender’s criteria.

This means your SA302 income may be lower than the amount you feel you actually earned.

Your accountant filed your return

If your accountant filed your return, you may need to ask them for the relevant tax calculation.

Some lenders may accept accountant-produced calculations, while others may ask for specific HMRC documents. This is another reason to check lender requirements early.

You may not have enough years available

Lender requirements vary. Some require two years of self-employed income evidence, while others can consider applicants with less than two years of trading history and at least one year of suitable evidence.

If you’ve only been trading for a short time, read our guide to getting a mortgage with one year’s accounts.

Your income may look lower after expenses

Allowable business expenses can reduce the profit reported through Self Assessment.

For sole traders in particular, a lower profit figure can reduce the income available to some lenders for affordability. This can affect how much you may be able to borrow.

For a deeper explanation, it’s worth understanding how lenders calculate self-employed income before applying.

What other documents might self-employed mortgage applicants need?

An SA302 tax calculation is only one document. Lenders may ask for several pieces of evidence to build a clearer picture of your income and affordability.

You may also need:

• Tax year overviews
• Business accounts
• Business bank statements
• Personal bank statements
• Accountant’s certificate
• Company accounts, if you’re a limited company director
• Proof of deposit
• ID and proof of address

The exact paperwork depends on your lender, income structure and how long you’ve been self-employed.

For a fuller breakdown, see our guide to documents you need for a self-employed mortgage.

Can a mortgage broker help with SA302s?

Yes. A mortgage broker can help you understand whether your SA302s and supporting documents are likely to meet lender requirements.

This can be useful because different lenders assess self-employed income in different ways.

For example, lenders can differ in the number of years of evidence they require and in how they treat rising or falling income. Company directors can also be assessed differently from sole traders because some lenders use salary and dividends while others can take company net profit into account.

A broker can help check your documents before you apply, identify lenders that may suit your circumstances, and reduce the risk of applying to a lender that isn’t a good fit for your income structure.

If you’re self-employed and unsure whether your SA302s, accounts or tax year overviews are enough for a mortgage application, Monday Mortgages can help you understand your options before you apply. Find out more about self-employed mortgage advice.