How it works
mortgage affordability calculadora — the short version
We built Mortgage Affordability calculadora because the other tools for this job either cost a subscription or came with a consent banner the size of a small novel.
Run the net number, not the headline rate: that is where surprises hide. Put the real cash figures in, even if they are rough — then run the sums and the rest of this page explains what the answer means.
Estimate the maximum mortgage a UK lender is likely to offer based on income, debts and stress-tested interest rates.
A worked example, step by step
Consider a realistic scenario and follow it through:
Estimate the maximum mortgage a UK lender is likely to offer based on income, debts and stress-tested interest rates.
When to use this calculadora
Mortgage Affordability calculadora is aimed at people arriving with questions like these:
- "How much mortgage can I get"
- "Mortgage affordability UK"
- "Income multiple mortgage"
- "What is mortgage affordability"
- "How to calculate mortgage affordability"
- "Mortgage affordability formula"
When to reach for something else
Every tool has an edge where it stops being the right answer. Mortgage Affordability calculadora is no exception:
- For legally binding tax or medical decisions — cross-check with HMRC, NHS or a qualified professional.
- For very large or very small extremes the rounding error outgrows the useful precision.
- When the underlying rate or threshold has changed since the page was last reviewed — always verify with the primary source.
- When the input you have is already a derived figure (net of something) — feeding it in as "gross" will double-subtract.
Five things that trip everyone up
Every time you run the sums for a new scenario, one of these creeps in — it's worth knowing them ahead of time.
- Entering a monthly figure into an annual field (or vice versa).
- Forgetting a leading zero on decimals (.5 instead of 0.5 breaks some inputs).
- Trusting a single reading when the underlying number naturally fluctuates.
- Comparing two answers that used different assumptions — always re-run both.
- Skipping the formula box. If you don’t understand the method, the answer is just a vibe.
The sources behind the numbers
Where the maths needs an external authority, we cross-check against:
- Bank of England
- FCA
- MoneyHelper
Works well alongside
If this question keeps coming up for you, the same cluster of tools usually comes next:
- Mortgage Repayment calculadora — Estimate your monthly UK mortgage repayment from loan amount, interest rate and term — with total interest paid over the life of the mortgage.
- Loan-to-Value (LTV) calculadora — Work out the LTV ratio on a UK mortgage from property value and deposit, with standard LTV bands and indicative rate impact.
- House Deposit calculadora — Work out how long it takes to save a deposit for a UK home at a given salary, monthly savings rate and house-price growth.
How we keep this accurate
Our calculadoras run on pure, unit-tested functions — the same logic lives in the browser and in the CI test suite. When tax rates, thresholds or official figures move, the update lands within 24 hours of the announcement. You can read the editorial policy and corrections policy.
Found an out-of-date number on Mortgage Affordability calculadora or anywhere else in the Finance toolkit? Send it to the editorial desk and we'll patch it. Or browse the full calculadora directory for the next tool you need.