Mortgage Affordability
Calculator 2025

Most UK lenders offer between 4 and 4.5 times your annual income. Some offer up to 5 or 5.5 times for high earners or professionals such as doctors and lawyers. The exact amount depends on your credit history, outgoings and the lender's own criteria. This calculator shows all three multiples so you can see the full range.

Lenders use income multiples as a starting point but also run a detailed affordability assessment. They stress-test your ability to afford payments if rates rise by several percentage points, and they consider all committed monthly outgoings including loans, credit cards, childcare and living costs.

Most lenders require a minimum 5% deposit. A 10% deposit unlocks better rates and more lender choice. A 25% or more deposit (75% LTV) typically gives access to the very best rates on the market. Your Loan to Value directly affects the interest rate you are offered.

The Bank of England base rate directly affects variable rate and tracker mortgages, which move with it. Fixed rate mortgages are locked for their term regardless of base rate changes, but lenders price new fixed deals based on swap rates which anticipate future base rate movements.

A whole-of-market mortgage broker can access exclusive deals not available directly from lenders and provide advice tailored to your exact situation. Many brokers charge no fee as they receive commission from lenders. For most buyers, especially first-time buyers, using a broker is strongly recommended.