EyeOnIllustrative affordability estimate
Illustrative scenario only: not financial advice, a lender decision, an offer, a quote, a credit-score forecast, or a guarantee of savings, repayment, approval, eligibility, tax treatment, or any financial outcome.
How affordability is usually assessed
Lenders typically start with income and existing commitments, then check whether a mortgage payment would still be affordable if rates rose or circumstances changed. The estimate here uses a simple budget rule: a share of what is left after other debt payments is treated as the maximum available for housing each month. Different lenders apply different rules, multipliers and stress tests, so two households with identical finances can be offered very different amounts.
The calculation also assumes the payment stays level for the whole term at the rate you enter. In reality, rates change, introductory deals end, and many people overpay or remortgage along the way. Treat the output as a planning figure rather than a prediction of what any lender would offer.
What the estimate does and does not include
The indicative property price simply adds your deposit to the estimated loan. It does not include purchase costs such as taxes, legal fees, valuation or insurance, which can add several percentage points to the amount needed on the day. Ongoing costs of owning a home, including maintenance, service charges and utilities, are also outside the loan maths.
Affordability is only half of the decision. Lenders also look at credit history, employment stability, age, the property itself, and the size of the deposit relative to the price. A budget that supports a certain payment does not guarantee an offer, and the estimate should not be read as one.
Ways the numbers move
Clearing or reducing other monthly debts often changes the estimate more than a small change in income, because the freed-up budget is multiplied across the whole term. A larger deposit lowers the amount that needs to be borrowed and usually improves the rate options available, which feeds into a lower estimated payment.
Interest rate and term have a visible effect too. A longer term reduces the monthly figure but increases total interest, while a higher assumed rate does the reverse. Comparing a few rate and term combinations gives a more honest picture than a single number.