Mortgage & Rent Affordability Calculator

Quickly estimate how much you can comfortably afford to spend on rent or a mortgage each month in the UK. Enter your take-home income, debts, deposit, and compare results using income multiples and stress rates. Built by HouseBudget.co.uk and runs entirely in your browser – no data is saved.

Rent Affordability

Use this tool to estimate a sensible maximum monthly rent based on your take-home pay and existing monthly commitments.

£
After tax and deductions.
£
Loans, credit cards, car finance, etc.
Many people aim to keep rent around 25–35% of take-home pay.

Rent estimate

Enter your details and click calculate.

    Mortgage Affordability

    This calculator estimates a maximum monthly mortgage payment, then converts that into a rough maximum mortgage size and property price based on your deposit, interest rate and term.

    £
    After tax and deductions.
    £
    Loans, credit cards, car finance, etc.
    Adjust if you want to be more cautious or more aggressive.
    %
    e.g. a 5-year fixed rate at 5.0%
    years
    £
    Cash you can put towards the property purchase.

    Mortgage estimate

    Enter your details and click calculate.

      Guides & Resources

      Explore our in-depth guides to help you understand rent and mortgage affordability, plan your housing budget and make more confident decisions. Each article links back to the HomeBudget Calculator so you can plug in your own numbers as you read.

      Core affordability guides

      Detailed topics

      Common real-world questions

      UK-focused affordability guidance from HouseBudget.co.uk

      The calculator blends common UK affordability checks with quick, private maths to help you sense-check your budget before speaking to a broker. Results are estimates only and do not replace regulated advice.

      Actual lending decisions can be stricter or more generous, depending on your full financial situation. Always check figures with a qualified adviser or lender before committing.

      Mortgage and rent affordability FAQs

      What income multiple do UK mortgage lenders use?

      Many high-street lenders cap borrowing around 4–5x annual income, but this can vary based on credit profile, outgoings and whether you are applying alone or jointly. Use the advanced income multiple slider to benchmark your result.

      How does a stress rate affect mortgage affordability?

      Lenders often check if you could afford repayments at a higher “stress” rate. Enter a stress rate (for example 7%) to see the stressed monthly payment against your budget.

      What percentage of income should go on rent?

      A common UK guideline is keeping rent near 30% of take-home pay after non-housing debts, but your comfort level may differ. Adjust the rent slider to see what works for you.

      Does the calculator store my personal details?

      No. Everything you enter is processed in your browser. HouseBudget.co.uk does not collect or save any inputs.

      Can this replace advice from a UK mortgage broker?

      This tool is for quick illustrations only. Always confirm affordability and product options with a FCA-authorised mortgage broker or lender.