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, and each applies its own assumptions about whether payments would stay manageable if rates changed. 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 this estimate is worked out: We apply a simplified take-home-pay estimate, allowances for the outgoings and dependants you enter, and an illustrative repayment rate and term. These assumptions are not lender criteria, and your result may differ materially from a lender’s affordability assessment.
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. Each lender applies its own affordability assumptions, including checking whether your payments would remain manageable if interest rates changed. This calculator gives a rough budget only, not a lender assessment.
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 borrowing relative to income, which varies by lender and applicant.
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.
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Stamp Duty calculator
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Mortgage repayments calculator
Work out your monthly payment from the loan amount, rate and term.