Mortgage affordability calculator
See what you could comfortably afford as a monthly mortgage payment — and a rough property budget — based on your real-world income and outgoings.
Loans, credit cards, car finance
Utilities, council tax, insurance, transport
Optional — to sense-check a specific deal
Affordable monthly payment
£1,988
Rough property budget
£379,982
Net monthly income
£3,700
Essential outgoings
£1,050
Lenders assess affordability differently — some weight childcare and dependants more heavily, others stress-test payments at a higher rate (often 7–8%). Self-employed, contractor and bonus income are also treated differently between lenders. This is a guide only — for a real figure, speak to an adviser.
How lenders assess affordability
Lenders don't just look at income multiples. They run your figures through their own affordability model, which weights childcare, dependants, debt repayments and committed monthly bills against your take-home pay. Most also stress-test your mortgage payment at a higher rate (often 7–8%) to check you'd still cope if rates rose.
Where lenders differ
- Treatment of bonus, overtime and commission (some take 100%, others 50%).
- Self-employed income — averaged across 1, 2 or 3 years depending on lender.
- How student loan repayments are factored in.
- Childcare costs — some weight these heavily, others less so.
- Maximum loan-to-income multiples (typically 4.5x, but up to 5.5–6x with some lenders).
This calculator gives a balanced starting point. For a figure tailored to a specific lender's criteria, an adviser can pre-check your case before you apply.
Other mortgage calculators
More tools to help you plan your mortgage.
How much can I borrow?
Estimate your maximum mortgage based on income and outgoings.
Deposit calculator
Work out how much deposit you need and how long it'll take to save.
Stamp Duty calculator
Calculate the Stamp Duty Land Tax due on your property purchase.
Mortgage repayments calculator
Work out your monthly payment from the loan amount, rate and term.