Estimate your mortgage borrowing potential based on income, outgoings and deposit, using typical UK lender affordability multiples.
Your gross annual salary before tax
Bonus, overtime, second job or rental income
How much you're putting down
Maximum LTV you're aiming for, e.g. 90%
Maximum borrowing
£180,000
This result is an estimate only and does not constitute financial advice.
Maximum property price
£210,000
This result is an estimate only and does not constitute financial advice.
Estimated monthly repayment
£1,105.36
Based on a 5.5% rate over 25 years
This result is an estimate only and does not constitute financial advice.
Mortgage affordability is the amount a lender is willing to offer you, based on how comfortably you could keep up repayments — not simply how much you'd like to borrow. Lenders in the UK typically use an income multiple, most commonly around 4 to 4.5 times your combined gross annual income, as a starting point for how much you can borrow.
Your income includes your salary, but many lenders will also consider additional income such as regular bonuses, overtime, a second job or rental income, provided it's consistent and can be evidenced. The more reliable income you can show, the higher your potential borrowing.
Your deposit and target loan-to-value (LTV) matter just as much as income. LTV is the size of your mortgage as a percentage of the property price — a 90% LTV mortgage means you're borrowing 90% of the price and putting down a 10% deposit. Lenders offer their most competitive rates at lower LTVs, typically 60-75%, and larger deposits also directly increase the property price you can afford, independent of your income multiple.
This calculator combines both constraints: it estimates your maximum borrowing based on your income multiple, then checks that figure against what your deposit supports at your target LTV, and uses whichever is lower. That gives a more realistic estimate of your true affordability than an income multiple alone.
Keep in mind that this is an estimate, not a mortgage offer. Lenders also run detailed affordability assessments that factor in your outgoings, credit history, existing debts and household expenditure, and every lender's criteria differ slightly. The monthly repayment figure shown assumes a representative interest rate and a 25-year term, so your actual repayment will depend on the specific deal you're offered.
Use the calculator above to get a starting estimate, then speak to a mortgage broker to find out exactly how much you could borrow and at what rate.
Most UK lenders offer around 4 to 4.5 times your gross annual income, though some will stretch to 5 or 5.5 times for certain professions or higher earners. This calculator uses a representative 4.5x multiple as a starting estimate.
Yes, many lenders will include regular, evidenced income such as bonuses, overtime, a second job or rental income. Requirements vary by lender, so it's worth checking which income sources will be accepted before you apply.
LTV is your mortgage amount expressed as a percentage of the property price. A smaller deposit means a higher LTV, which usually comes with a higher interest rate. Aiming for a lower LTV, such as 80% or below, typically unlocks better rates.
No. This calculator gives you a quick estimate based on simple rules of thumb. A mortgage agreement in principle involves an actual lender running a full affordability and credit assessment, and is needed before most estate agents will accept an offer.
Compare mortgage brokers who can search the whole market and confirm your real affordability with a lender.