Mortgage Affordability Calculator UK
Get a rough idea of how much you might be able to borrow, your likely property budget and an estimated monthly payment.
years
% per year
Estimated you could borrow
£229,200 to £259,200
Based on £60,000 total income
- Property budget
- £259,200 to £289,200
- Your deposit
- £30,000
- Est. monthly payment (upper)
- £1,313.33
How much can you borrow for a mortgage?
Most UK lenders base their maximum loan on a multiple of your income, commonly between 4 and 4.5 times your annual salary, and sometimes more for higher earners. This calculator uses that range to give a lower and upper borrowing estimate.
Your total household income matters, so a joint application usually allows a larger loan. Existing debt commitments such as loans and credit cards reduce how much a lender will offer, because they lower the amount you can comfortably repay each month.
How your deposit affects your budget
Your property budget is your borrowing plus your deposit. A larger deposit not only increases your budget but usually unlocks lower interest rates, because the lender is taking less risk relative to the property value.
Remember to leave money aside for other buying costs such as Stamp Duty, valuation and legal fees, and moving expenses. These costs are not part of your mortgage.
Worked example
A couple with a combined income of £60,000, £200 of monthly debt payments and a £30,000 deposit might be offered somewhere between £240,000 and £270,000, giving a property budget of roughly £270,000 to £300,000.
At a 4.5% interest rate over 30 years, borrowing £270,000 would cost around £1,368 a month.
Please note: This is an estimate to help you plan and is not a mortgage offer or financial advice. Speak to a qualified mortgage adviser or lender for a decision based on your circumstances.
Frequently asked questions
Is this a mortgage offer?
No. It is a rough guide only. Lenders assess your full circumstances including credit history, spending and the property itself before making any offer.
Why do my debts reduce what I can borrow?
Lenders check that you can afford repayments alongside your other commitments. Regular debt payments reduce your spare income, so they lower the loan a lender will approve.
What income multiple do lenders use?
Typically 4 to 4.5 times income, though some lenders go higher for professionals or high earners. This tool uses a 4 to 4.5 range as a sensible middle ground.
Should I include benefits or bonuses as income?
Lenders treat guaranteed income differently from variable income like bonuses. Include reliable regular income for a realistic estimate.
How big a deposit do I need?
Many lenders accept 10%, and some accept 5%, but a larger deposit generally means better rates and more choice.
Figures last reviewed on 13 August 2025.
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