House Affordability Calculator
Find out the maximum property you can afford based on your income, deposit, and monthly commitments. Uses the standard 4.5× income multiple used by most UK lenders.
How Mortgage Lenders Assess Affordability
Income Multiple
Most lenders use 4–4.5× your gross annual salary as the starting point. Some specialist lenders offer up to 5.5× income for certain professions (doctors, solicitors, accountants). Joint applications use combined income.
Stress Testing
Lenders stress-test your mortgage at 3% above the current rate to ensure you could afford payments if rates rise. This often limits borrowing below the headline income multiple. Large credit card debts or car finance reduce affordability significantly.
Deposit Size Matters
A 10% deposit (90% LTV) is the minimum for most lenders. 15% (85% LTV) opens better rates. 25% (75% LTV) unlocks the best deals. Each 5% increase in deposit typically saves 0.3–0.5% on the mortgage rate — worth calculating over a 25-year term.
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