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UK Calculators

Mortgage Affordability Calculator

Compare an income-multiple borrowing scenario with a monthly repayment budget. This is not a lender decision.

Last reviewed

Mortgage Affordability Calculator

Illustrative borrowing amount

£215,892.39

Income-multiple scenario£225,000.00
Payment-budget scenario£215,892.39
Property price with deposit£255,892.39

Illustration only, not a mortgage offer or financial advice.

Reading the result

The income multiple is your assumption, not a promised lending limit. The interest rate stays fixed for the selected term.

How it works

We calculate an income-based loan and the present value of your monthly payment budget at the entered rate. The lower figure is shown, with your deposit added for a purchase-price scenario.

Worked examples

Worked example

First annual gross income (£): 50000; Second annual gross income (£): 0; Deposit (£): 40000; Income multiple: 4.5; Monthly mortgage budget (£): 1200; Annual interest rate (%): 4.5; Term (years): 25

  1. We calculate an income-based loan and the present value of your monthly payment budget at the entered rate. The lower figure is shown, with your deposit added for a purchase-price scenario.
  2. Income-multiple scenario: £225,000.00
  3. Payment-budget scenario: £215,892.39
  4. Property price with deposit: £255,892.39

Illustrative borrowing amount: £215,892.39

Assumptions

The result depends on the following. If any of them do not match your situation, treat the figure as indicative only.

  • The income multiple is your assumption, not a promised lending limit. The interest rate stays fixed for the selected term.

What this calculator does not do

  • Lender stress tests, credit history, dependants, committed spending, loan-to-value limits, fees and Stamp Duty are excluded.

Methodology

We calculate an income-based loan and the present value of your monthly payment budget at the entered rate. The lower figure is shown, with your deposit added for a purchase-price scenario.

Inputs are processed locally. Displayed amounts are rounded; the calculation retains precision.

Frequently asked questions

Will a lender offer the amount shown?

Not necessarily. Lenders assess affordability and credit individually, and can lend less than either scenario.

Should my budget include other housing costs?

Enter only the amount available for mortgage repayments after allowing for council tax, insurance, service charges and other commitments.

Please note: Results are estimates for general information only and are not financial, tax or legal advice. Figures depend on the assumptions listed on each page and on your personal circumstances.

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