UK mortgage borrowing calculator
Explore an income multiple, monthly budget and deposit together. Adjust the values to explore your numbers.
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How to calculate UK mortgage borrowing
This is a budgeting scenario, not a lender affordability decision or agreement in principle. The income multiple and maximum LTV are editable assumptions, not available offers. Monthly budget = take-home − spending − safety buffer. Uses repayment mortgage maths at your chosen rate; it does not infer tax from gross income. Credit history, dependants, age, property, income eligibility and lender stress testing are not assessed. Deposit excludes legal fees, tax and other buying costs.
A worked example
With applicant 1 gross annual income (£) of 50,000, applicant 2 gross annual income (£) of 25,000, illustrative income multiple of 4.5, household monthly take-home (£) of 4,800, monthly spending / debts excluding new mortgage (£) of 2,400, monthly safety buffer (£) of 600, deposit available, excluding buying fees (£) of 40,000, illustrative maximum loan-to-value (%) of 90, annual mortgage rate (%) of 5, mortgage term (years) of 25, illustrative mortgage budget is 307,908.08 GBP. Change the example above to match your situation.
Enter amounts in the same currency and time period. Results display up to two decimal places; calculations use unrounded values. These estimates are for planning and education.
Common questions
Is this what a bank will lend me?
No. It compares your own assumptions. Each lender assesses eligible income, credit commitments, living costs, dependants and interest-rate risk. An actual decision can be lower or higher.
Does the property budget include stamp duty and solicitors?
No. It is the estimated mortgage plus your deposit. Use the home-buying cost calculator to budget separately for purchase tax and fees.