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Mortgage affordability calculator
How much could you borrow? Sole or joint income, deposit and commitments in, estimated loan, property price and monthly repayments out, including what you would pay if rates rose.
Assumptions, not a quote: income times a multiple, with annualised commitments deducted from income first, the way many lenders do. The default 5.5% rate is around the average 5-year fix in June 2026; change it to match deals you are seeing.
You could borrow roughly
£157,500
Max property price £182,500 with your £25,000 deposit (14% deposit)
- Monthly repayment at 5.5% over 25 years£967.19
- Stress-tested at 8.5% (+3pp)£1,268.23
A gentle reality check: most lenders cap lending around 4.5 times income, and they stress-test that you could still pay at a higher rate. Your credit history, age, spending and the property itself all move the real figure, so treat this as a starting range, not a promise.
Do not forget stamp duty on top of the deposit: stamp duty calculator. Still building the deposit? Try the savings goal planner.
Common questions
- How many times my salary can I borrow?
- Most lenders offer around 4 to 4.5 times your annual income, so £40,000 a year supports roughly £160,000 to £180,000 of borrowing. Some lenders stretch to 5 or 5.5 times for higher earners or certain professions, but regulators limit how much lending banks can do at or above 4.5 times income, so those deals are rationed.
- What deposit do I need?
- Usually at least 5% of the purchase price, so £12,500 on a £250,000 home. A 10% deposit (£25,000 on the same home) unlocks noticeably cheaper rates, and each 5% step up tends to improve the deal further. Remember stamp duty, legal fees and moving costs come on top of the deposit.
- What is a mortgage stress test?
- Before approving you, lenders check you could still afford the repayments if rates rose, not just at today's rate. FCA rules require them to test at least a 1 percentage point rise, and many test around 3 points higher. On a £200,000 loan over 25 years, 5.5% costs about £1,228 a month but 8.5% costs about £1,610, and you need to pass at the higher number.
- Do credit cards and loans reduce what I can borrow?
- Yes. Lenders deduct committed outgoings such as loan repayments, car finance and card payments you will keep after moving. As a rough rule, £200 a month of commitments is £2,400 a year off your usable income, which at 4.5 times income is about £10,800 less borrowing. Clearing debt before applying often raises your maximum more than saving the same money would.
- Is the result a guarantee of what I can borrow?
- No. It is an estimate based on the income multiple you choose. A real lender will also look at your credit history, age, spending, the property itself and their own stress test, so the actual offer can be higher or lower. For a figure you can rely on, get a decision in principle from a lender or speak to a mortgage broker. This tool is guidance, not regulated financial advice.
Budgeting for the purchase? The stamp duty calculator shows the tax due on top of your deposit, and the savings goal planner turns your deposit target into a monthly amount. Estimates here are guidance, not regulated financial advice.