Mortgage Affordability Calculator UK
Discover your true property purchasing power. We calculate your maximum borrowing potential based on your income, deposit, and monthly commitments using standard UK lender metrics.
Base Rate Trend (10 Years)
Historical view of the Bank of England base rate, showing the rapid rise in 2022-23 and the stabilizing trend for 2026.
Note: 2026 data represents projected market expectations. Actual rates may vary based on inflation and economic performace.
The 4.5x Income Rule
In 2026, the standard lending metric remains the 4.5x Income Multiplier. Most lenders allow you to borrow up to 4.5 times your gross annual income.
- Single (£40k) → £180,000
- Joint (£70k) → £315,000
*Some professions (e.g. doctors) may qualify for 5.5x multiples.
The "Stress Test"
Lenders check if you can afford repayments even if rates rise. Existing debts reduce your borrowing power significantly:
- Personal Loans & Car Finance
- Credit Card Balances
- Childcare Costs
Tip: Reducing credit card balances before applying can boost borrowing power.
Student Loans & Mortgages?
Student loans differ from commercial debt. They don't appear on your credit file the same way, but the monthly repayment is treated as a "committed expenditure." This slightly lowers your maximum borrowing amount, but usually not enough to stop a purchase.