Mortgage Affordability Calculator UK
Find out how much you could borrow for a UK mortgage based on your income, deposit and existing debts. Lenders typically offer around 4.5x income — see your estimated borrowing range and maximum property price.
Calculator
What this means
Mortgage lenders usually cap borrowing at a multiple of your income — commonly 4 to 4.75 times, with 4.5x typical. Your deposit is added on top to give the maximum property price. Existing debts and your monthly budget can reduce how much you're offered.
How to use this calculator
- Enter your annual income (and a second income if buying jointly).
- Add any regular financial commitments.
- See an estimate of how much you might be able to borrow.
Worked example
A couple earns £35,000 and £28,000 (£63,000 combined).
- Many lenders offer around 4 to 4.5 times income.
- £63,000 × 4.5 = £283,500 as a rough guide.
You might borrow in the region of £252,000 to £283,500, subject to deposit, credit and affordability checks.
Who this is for
- First-time buyers gauging their budget before viewing.
- Couples combining incomes for a joint mortgage.
- Anyone checking borrowing power before applying.
How lenders decide what you can borrow
Lenders typically lend around 4 to 4.5 times annual income, but the final figure depends on a full affordability assessment: your outgoings, existing debts, credit history, deposit and the stress-tested cost of the mortgage.
A bigger deposit lowers your loan-to-value and can unlock better rates. Reducing other debts before applying can increase how much you're offered.
Frequently asked questions
Most UK lenders offer around 4 to 4.5 times your annual income, sometimes up to 4.75x or more for higher earners. This calculator uses your chosen multiple and adjusts for monthly debts.
Your deposit doesn't change the income multiple, but it adds to your borrowing to set the maximum property price. A larger deposit lowers your loan-to-value, which usually unlocks better interest rates.
No. It's a guide only. Lenders run a full affordability assessment looking at your outgoings, credit history and the property. Get a decision in principle from a lender or broker for an accurate figure.
Commonly 4 to 4.5 times income, though some lenders go higher for certain professions or strong applications. The actual offer depends on affordability and credit checks.
Yes. A larger deposit reduces your loan-to-value ratio, which usually means lower interest rates and more lender choice.
Disclaimer
This calculator provides estimates for guidance only. It is not financial, legal or tax advice. Always check official sources or speak to a qualified professional before making decisions.
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