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.
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.
When to Seek Financial Advice
Calculator results provide estimates based on stated inputs and should not replace professional financial advice for significant decisions. Free, regulated financial guidance is available through MoneyHelper (moneyhelper.org.uk, 0800 011 3797) for general money queries. Regulated independent financial advisers (IFAs) — find one at unbiased.co.uk — provide personalised advice on mortgages, pensions, investments, and insurance. Advice fees are typically £150-350 per hour or a percentage of assets
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