Mortgage Affordability Calculator
Lenders usually offer between 4 and 4.5 times your annual income, sometimes more. Add your deposit and you get the maximum property price you can realistically target.
Enter your income, any additional household income, the lender multiple and your deposit.
How the calculation works
We believe numbers should be transparent. Here is the formula behind this calculator.
Worked example
Worked example: £40,000 income, £25,000 deposit
Important assumptions
- Uses the income multiple method, which is how most UK lenders cap borrowing.
- Lenders also stress-test your affordability against bills, debts and interest rate rises.
- The actual amount depends on your credit record and the lender's policy.
Rates & official sources
Every calculation is based on the official rates and rules published by GOV.UK and HMRC.
Frequently asked questions
How much can I borrow on my salary?
Most lenders offer 4 to 4.5 times your annual income. Some offer up to 5.5 or 6 times for higher incomes or strong applications, but that is less common.
What else do lenders check?
Credit score, regular outgoings, debts, and how you would cope with higher interest rates. Even if the multiple says you can borrow X, the stress test may reduce it.
Does a bigger deposit help?
Yes — it lowers your loan-to-value, which usually gets you a better interest rate and a larger maximum price. This calculator adds your deposit to your mortgage to find the price.
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View calculatorRelated guides
New to the topic? Read a plain-English guide on mortgage & property, with worked examples and tips.
These calculations are estimates for guidance only and are not professional financial, tax or legal advice. UK rates and rules change, so always verify important figures with official GOV.UK / HMRC information or speak to a qualified professional. See our full disclaimer.