Affordability
Gross salary vs mortgage payment: a sanity check
Last updated 23 July 2026
Check take-home pay and mortgage togetherBefore you speak to a lender, it helps to know whether the housing payment you are modelling looks plausible against your take-home pay. That means the mortgage repayment plus running costs (council tax, maintenance, insurance), not the repayment alone.
Compare take-home pay with the full housing stack (repayment plus ownership costs), not the mortgage alone. If the combined figure uses a large share of net income, stress a higher rate or a larger deposit before you treat the scenario as comfortable.
This is a personal budget check, not a lender decision. Lenders use their own affordability rules and stress rates.
Start with gross salary to estimate monthly net pay after tax and National Insurance. Then add the home scenario: repayment, council tax, maintenance, and insurance.
If the combined housing figure is a large share of net income, you have less buffer for life costs, savings, and rate rises at renewal. That is a prompt to stress-test a higher rate or a larger deposit. It is not a yes or no on whether a lender would approve you.
Worked example: salary sanity check
£55,000
£350,000
15%
5% · 25 years
On
Key takeaways
- Use net pay, not gross, when judging housing headroom.
- Include ownership running costs with the repayment.
- A tight ratio is a prompt to stress-test, not a lending verdict.
Income and other debt in one view
You can also enter monthly net income and other debt payments alongside the housing scenario for a structured view of how much headroom is left. A lender’s affordability test will use its own rules and stress rates. This is for your own planning.
Try your scenario
Change the inputs on the calculator (price, nation, or buyer type) and see how the numbers respond.
Check take-home pay and mortgage togetherAssumptions and sourcesRelated reading
Palta Money is for education and planning only. It is not regulated financial advice. Tax rules and rates change; confirm figures with official sources or a qualified adviser before you commit.