What is an SA302? – Complete Guide for Self Assessment
How to Get, Understand and Use Your Tax Calculation Form
87% of mortgage applications from self-employed applicants require an SA302. This guide explains everything you need to know about this crucial tax document.
What is an SA302 Form?
An SA302 is an official HMRC document that shows:
- Your taxable income breakdown
- Calculated tax liability
- Tax payments made
- Outstanding balances
TYPICAL USE CASES
- Mortgage applications (required by 95% of UK lenders)
- Visa applications (for self-employed applicants)
- Loan approvals
- Rental agreements
- Proof of income for contractors
SA302 vs Tax Return: Key Differences
| Feature | SA302 | Self Assessment Tax Return |
|---|---|---|
| Purpose | Proof of income/tax calculation | Declaration of income/expenses |
| Length | 1-2 pages summary | Multiple pages (full details) |
| When Generated | After submission/completion | Before submission |
| Acceptance | Widely accepted by lenders | Rarely accepted alone |
How to Get Your SA302
For Online Filers
- Log in to your HMRC online account
- Go to "Self Assessment" then "More Self Assessment details"
- Select "Get your SA302 tax calculation"
- Choose the relevant tax year
- Download or print the document
For Paper Filers
- Call HMRC at 0300 200 3310
- Request your SA302 for specific tax years
- Allow 10 working days for delivery
Through Your Accountant
- Authorize your accountant to access your HMRC account
- Request they download the SA302 for you
- Ensure it includes the HMRC logo and reference number
Important: Many lenders now require SA302 with tax year overview (available in your HMRC account). This combination provides proof the tax was actually paid.
Understanding Your SA302
| Section | What It Shows | Why It Matters |
|---|---|---|
| Income | Breakdown by source (self-employment, dividends, etc.) | Lenders verify income streams |
| Tax Calculation | How your tax liability was calculated | Shows net profit after expenses |
| Payments on Account | Advance payments for next tax year | Affects your disposable income |
| Tax Due/Repayment | Final amount owed or to be refunded | Indicates financial responsibility |
Common SA302 Problems & Solutions
1. "No SA302 Available" Message
- Cause: Return not processed yet
- Solution: Wait 72 hours after submission or contact HMRC
2. Lender Rejects Digital Version
- Cause: Some banks require posted copies
- Solution: Request HMRC post it directly to you
3. Missing Older Tax Years
- Cause: HMRC only stores 4 years online
- Solution: Call HMRC for archived records
PRO TIP
Always download and save PDF copies of your SA302s each year. Lenders typically require 2-3 years' worth for mortgage applications.
Need Help With Your SA302?
Our tax specialists can help you obtain, understand and use your SA302 for mortgage applications and financial planning.
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