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 income you declared through Self Assessment for a specific tax year, along with the tax due based on that income.

In simple terms, it’s a summary of how HMRC has calculated your tax after you submitted your Self Assessment tax 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.

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
• Tax already paid
• 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, your business may have taken £80,000 in revenue during the year. But if your taxable profit after expenses was £45,000, a lender may focus more on the £45,000 figure than the total money paid into the business.

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 thing.

An SA302 shows the tax calculation based on your Self Assessment return. It summarises the income declared and how the tax has been worked out.

A tax year overview shows your overall tax position for that tax year. This usually includes the tax due, tax paid and any outstanding amount shown by HMRC.

Mortgage lenders may ask for both because they want to see that the figures line up.

In simple terms:

• The SA302 shows the calculation
• The tax year overview shows the HMRC account position for that year

Together, they help lenders check that the income declared in the mortgage application matches the tax information held by HMRC.

How do you get an SA302?

If you filed your tax return online through HMRC, you can usually access your SA302 calculation through your HMRC online account.

If your accountant submitted your tax return using commercial software, you may need to ask them for the tax calculation. In some cases, the document may not look exactly like an HMRC-downloaded SA302 form, but it can still show the relevant tax calculation.

Different lenders can have different rules on what they’ll accept, so it’s worth checking before you apply.

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, your SA302 or tax year overview may not update straight away.

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 usually look at income differently. Depending on your structure, they may focus on taxable profit, salary, dividends or sometimes retained profit.

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

Many lenders prefer to see two or more years of self-employed income, although this isn’t always essential.

Some lenders may consider applicants with a shorter trading history, depending on the strength of the case. If you’ve only been trading for a short time, it may be worth reading about getting a mortgage with one year’s accounts.

Your income may look lower after expenses

Claiming legitimate business expenses can reduce your taxable profit.

That may be good from a tax perspective, but it can also reduce the income figure some lenders use for affordability. This can affect how much you’re 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, one lender may average your profit across two years. Another may look more closely at your latest year. Some may be more flexible with company directors, salary and dividends, retained profit or applicants with shorter trading histories.

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.