Mortgage affordability calculator
Mortgage Affordability Calculator
Enter your salary and deposit to see how much you could borrow for a mortgage, what your monthly payments would be and how affordable it really is.
Your gross annual salary before tax.
Optional. Add a partner's income to increase your borrowing power.
Partner's salary is included in the combined income calculation.
The amount you have saved to put towards the property.
The expected annual mortgage interest rate.
Max you can borrow
£157,500Max property price
£207,500Monthly payment
£921Deposit %
£24%Affordability gauge
Based on an estimated net monthly income of £2,188 (75% of combined salary)
Your ratio: 42.09% of net monthly income goes to your mortgage
Lenders typically allow you to borrow 4 to 4.5 times your combined annual salary. This calculator uses a 4.5× multiplier. Your actual offer may differ based on credit score, existing debts and lender policy.
How lenders calculate affordability
Income multiple
Most UK lenders offer between 4 and 4.5 times your combined annual salary. Some may offer more with specialist products.
Deposit size
A larger deposit reduces the loan-to-value ratio, which can unlock better interest rates and make your application more attractive.
Outgoings & debts
Lenders assess your monthly commitments — credit cards, loans, childcare — and calculate a stress-tested payment to ensure you can still afford repayments if rates rise.
Credit score
A strong credit history gives you access to the best deals. Missed payments or a thin credit file may limit your options or reduce how much you can borrow.
Frequently asked questions
How much can I borrow for a mortgage in the UK?
Most UK lenders will offer you between 4 and 4.5 times your combined annual salary. Some lenders may offer more through specialist products, but a typical mortgage on a £50,000 deposit and £35,000 salary would allow you to borrow around £157,500, giving a maximum property price of £207,500.
What is a good mortgage affordability ratio?
A ratio below 30% of your net monthly income is considered safe and comfortable. Between 30% and 40% is a stretch but manageable for many borrowers. Above 40% is generally considered risky as it leaves little room for unexpected expenses or rate increases.
Does my partner's salary count towards mortgage affordability?
Yes. If you apply for a joint mortgage, both salaries are combined and multiplied by the lender's income multiple. Even if your partner is not on the mortgage, some lenders may consider household income if it supports the application.
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View →Important note
This calculator provides an estimate only. Actual mortgage offers depend on your credit score, lender criteria, existing debts and other factors. Always consult a mortgage adviser before making financial decisions.