SA302 Form: How to Download and Use It
An SA302 summarises your Self Assessment tax calculation and can help prove your income.
An SA302 is a tax calculation produced after a Self Assessment tax return has been submitted. Although it is commonly called an SA302 form or SA302 certificate, it is not normally a blank form that the taxpayer completes. It summarises the income included in the return, relevant allowances and the resulting tax calculation for a particular tax year. Self-employed people are frequently asked for it when a lender needs evidence of their declared earnings.
The document may also be useful to sole traders, landlords, contractors, company directors and other Self Assessment taxpayers who need a record of their tax calculation. Mortgage providers commonly request an SA302 together with a Tax Year Overview, but their evidence requirements can differ. Anyone unfamiliar with the wider filing process can first read the Self Assessment tax return guide.
What Is an SA302 Form?
An SA302 is HMRC’s calculation of the Income Tax and related amounts arising from a submitted Self Assessment return.
According to HMRC’s explanation of a Self Assessment bill, the tax calculation is also known as an SA302 or tax computation. It shows how the liability for a particular tax year has been calculated using the information reported in the tax return. It is different from the Self Assessment statement, which summarises amounts owed and payments made.
The expression “SA302 form” can therefore be misleading. A taxpayer generally completes a Self Assessment return, after which the tax calculation becomes available. The SA302 is not evidence that HMRC has audited or independently certified every figure reported in the return. It reflects the calculation based on the submitted information and any subsequent amendments or HMRC adjustments recorded at that time.
What Is an SA302 Used For?
An SA302 is principally used as evidence of declared income and the associated Self Assessment tax calculation.
An SA302 may be requested when a person needs to demonstrate earnings that are not fully shown through ordinary PAYE payslips. The most familiar example is a self-employed mortgage application, although the document may also be relevant to other lending or financial checks. It can show income from sources reported through Self Assessment and how HMRC calculated the resulting tax liability.
The SA302 does not automatically prove that the tax has been paid. A lender may therefore request a corresponding Tax Year Overview, business accounts, bank statements or other evidence. Before making a property decision, applicants can use the mortgage affordability calculator for an initial estimate, but the lender will apply its own affordability and documentation requirements.
Who Might Need an SA302?
People with income reported through Self Assessment may need an SA302 when an organisation requests evidence of their declared earnings.
Sole traders and freelancers are commonly associated with SA302 requests because their earnings may vary from year to year. Contractors, partners, landlords and some company directors may also need the document where part of their income is declared through Self Assessment. Being self-employed does not by itself mean that an SA302 must be supplied for every financial application.
The requesting organisation determines what evidence is required. Some lenders assess an average across several tax years, while others may place greater weight on the latest year, business accounts or recent trading performance. Self-employed applicants wanting an initial view of their tax position can use the self-employed tax calculator, although its estimate does not replace an HMRC calculation or submitted return.
How to Get an SA302
You can normally obtain an SA302 after submitting your Self Assessment return through HMRC online services or compatible commercial software.
HMRC states that evidence of earnings in the form of an SA302 is available for the last four years after the relevant Self Assessment returns have been submitted. The correct retrieval method depends on how the return was filed. If the return was submitted directly through HMRC’s online service, the calculation should be accessed through the Self Assessment section of the taxpayer’s online account.
HMRC currently directs online users to sign in, open “Self Assessment” and select “More details about your Self Assessment returns and payments.” The wording or exact presentation inside the account may change as HMRC updates its services. The official starting point and current instructions are available on the GOV.UK SA302 page.
If an accountant or taxpayer filed the return through commercial software, the tax calculation will normally need to be printed or saved from that software. It may be labelled “tax computation” rather than “SA302.” The associated Tax Year Overview can still be obtained through the HMRC online account.
How to Download Your SA302 Online
Sign in to your HMRC account, open the relevant Self Assessment return and use the available print or save option for its tax calculation.
- Sign in to the HMRC online account used for Self Assessment.
- Open the Self Assessment service.
- Select “More details about your Self Assessment returns and payments.”
- Choose the relevant tax year.
- Open the option to view the return or tax calculation.
- Print the SA302 or use the device’s print function to save a PDF, where available.
- Return to the account and obtain the matching Tax Year Overview if it is also required.
According to HMRC, taxpayers cannot print these documents until 72 hours after submitting the return. This is particularly important where a mortgage application is subject to a deadline. Filing a return and immediately searching for the calculation may therefore make the SA302 appear to be missing when the account simply has not finished processing it.
Users should access HMRC through GOV.UK rather than links in unexpected messages. The SA302 contains sensitive financial and identifying information, so downloaded copies should be stored securely and shared only with the intended organisation through an appropriate method.
What Does an SA302 Tax Calculation Show?
An SA302 shows the income and tax calculation produced from a submitted Self Assessment return for one tax year.
The document normally identifies the taxpayer and tax year before setting out the figures used in the calculation. Depending on the return, it may include income from employment, self-employment, property, pensions, savings, dividends or other taxable sources. It may then show deductions, allowances, taxable income, Income Tax and relevant National Insurance amounts.
The precise layout and entries depend on the tax year, filing route and taxpayer’s circumstances. A person with straightforward sole-trader profits will not necessarily see the same sections as a landlord or company director. The Income Tax calculator can provide a separate estimate, but differences should be investigated rather than assuming that either calculation is automatically wrong.
An SA302 can also show how payments on account contribute to the amount due, but the calculation should not be confused with a payment record. Taxpayers facing advance instalments can review the separate guide to the Self Assessment payment on account deadline.
SA302 Example
A typical SA302 identifies the tax year, summarises reported income and shows how HMRC reached the calculated liability.
The following is a structural example rather than a replica of an official HMRC document. Actual descriptions and sections can vary, and some taxpayers will have additional calculations. It should not be used as proof of income or submitted in place of the genuine tax calculation.
| Typical section | What it may contain |
|---|---|
| Taxpayer details | Name, tax year and relevant HMRC identifiers |
| Income received | Employment, self-employment, property, pension, savings or dividend income reported |
| Deductions and allowances | Relevant deductions, losses, reliefs and Personal Allowance |
| Taxable income | Income remaining after the applicable calculation steps |
| Tax calculation | Amounts charged at the relevant Income Tax rates |
| Other amounts | Relevant National Insurance, student loan or other Self Assessment amounts |
| Calculated liability | The resulting liability for the tax year, subject to the complete calculation |
An SA302 example found online should never be altered or used as a template for creating evidence. Mortgage providers and other organisations may verify figures against supporting documents. Only the calculation obtained from HMRC or the software used to submit the return should be presented as the taxpayer’s document.
Tax Year Overview vs SA302
An SA302 explains the tax calculation, while a Tax Year Overview records the corresponding HMRC account position for that year.
| Document | Main purpose | Typical source |
|---|---|---|
| SA302 | Shows how the Self Assessment liability was calculated | HMRC online services or the commercial software used to file |
| Tax Year Overview | Shows the HMRC account position for the selected tax year | HMRC online account |
The documents are complementary rather than interchangeable. The SA302 shows the calculation arising from reported income, while the Tax Year Overview helps connect that calculation with the taxpayer’s HMRC record. A lender may ask for both documents bearing the same tax year and matching figures.
HMRC publishes a list of lenders that agreed to accept printed calculations and Tax Year Overviews. However, that page was last updated in June 2020 and should not be treated as a current or exhaustive statement of every lender’s policy. Applicants should confirm the exact document format, number of years and recency requirements directly with their chosen lender.
How Many Years of SA302 Documents Are Needed?
The number of SA302 calculations required is set by the lender, although HMRC currently provides earnings evidence for the last four years.
There is no single document period that applies to every mortgage application. A lender may request one, two or more years depending on its criteria, the stability of the applicant’s income and the nature of the business. Some may also request finalised accounts, business bank statements or an accountant’s certificate.
Applicants should ask for a precise list before supplying documents. This avoids downloading the wrong years or assuming that an SA302 alone is sufficient. Where the most recent return has not yet been filed, the lender may apply different evidence requirements rather than accepting an estimate of the year’s income.
Common SA302 Problems
Missing documents are commonly caused by recent filing, using commercial software or accessing the wrong HMRC account or tax year.
If the return was submitted less than 72 hours ago, HMRC advises waiting until that processing period has passed before trying to print the documents. If commercial software was used, the SA302-equivalent calculation may only be available through that product. The software provider or accountant may need to explain where its tax computation is stored.
If figures appear incorrect, first check that the final submitted return—not an earlier draft—has been selected. Review whether an amendment or HMRC adjustment has changed the calculation. Do not manually edit the downloaded document; correct the underlying return or contact HMRC where appropriate and then obtain the revised calculation.
Taxpayers should keep the calculation, Tax Year Overview, submitted return and supporting records together. The guide explaining how long to keep tax records provides further information about record-retention periods. Mortgage providers may impose their own practical document requirements in addition to HMRC’s tax-record rules.
Is an SA302 the Same as Proof That Tax Was Paid?
No. An SA302 calculates the liability but does not by itself prove that the resulting tax has been paid.
The calculation and payment record perform different functions. An SA302 can show how much tax arose from the return, while the Self Assessment statement or Tax Year Overview provides information about charges and account activity. Payments made very recently may also take time to appear in the relevant HMRC view.
This distinction matters when a lender requests evidence that matches across several documents. Applicants should supply exactly what has been requested rather than describing an SA302 as a receipt or payment certificate. Where information appears inconsistent, the discrepancy should be resolved before the documents are submitted.
This guide provides general information about SA302 tax calculations and HMRC online services. Access routes and mortgage evidence requirements can change, while individual circumstances vary. Confirm current requirements with your lender and check GOV.UK for the latest HMRC guidance. For personalised tax advice, consult a qualified tax adviser or contact HMRC directly.
Written by
Sarah Collins
Sarah Collins covers self assessment, self-employed tax, side hustle income and small business finances in the UK.
See more from Sarah Collins