UK Mortgage Affordability Calculator
Find out roughly how much you could borrow for a UK mortgage. Enter your income, your regular outgoings and your deposit, and the calculator applies the same income multiples and stress-testing logic that UK lenders use.
UK Mortgage Affordability Calculator
Estimate how much you could borrow based on lender income multiples (4.5x–5.5x) and your monthly commitments.
Annual Income Details (£)
Monthly Outgoings & Commitments (£)
Deposit & Term Preferences
Based on a standard 4.5x gross annual household income (£45,000) adjusted for outgoings.
This calculator gives an indicative estimate only. It is not a mortgage offer, a mortgage in principle, or financial advice. Actual borrowing limits depend on full underwriting by an individual lender.
How Do UK Lenders Actually Decide What You Can Borrow?
Every mortgage application comes down to one question: could you keep making the payments if life got a bit harder? UK lenders answer that by combining an income multiple with a close look at what you already spend each month, then checking the result against rules set by the Financial Conduct Authority (FCA) and the Bank of England.
The income multiple gets most of the attention, and for good reason. Multiply your gross annual income by a set figure and you get a rough ceiling on what you can borrow. But that multiple is only the starting point. Your committed monthly spending, the number of people who depend on your income, and how much deposit you bring to the table all move the final number up or down, sometimes by tens of thousands of pounds.
Four Factors That Shape Your Borrowing Limit
1. Gross Annual Income
This covers basic salary plus any guaranteed bonuses, regular overtime and pension income a lender will count. Joint applicants add their incomes together before the multiple is applied.
2. Monthly Credit Commitments
Personal loans, car finance, credit card balances and buy-now-pay-later agreements all eat into the income a lender treats as available for a mortgage payment, which pulls your maximum loan down.
3. Dependents & Childcare Costs
Lenders build in an assumed living cost for children or other dependents. Nursery fees and school fees are added on top and reduce what you can borrow further still.
4. Deposit & Loan-to-Value (LTV)
A bigger deposit lowers your LTV, which usually unlocks cheaper interest rates and can make a lender more comfortable lending closer to their maximum multiple.
The Income Multiple, Explained Properly
The Bank of England limits how much of a lender's new mortgage lending can go out above 4.5 times a borrower's income, capping it at 15% of new loans. That is a rule for lenders' overall books, not a hard ceiling for every individual borrower, which is why the multiple you are offered can vary quite a lot between lenders.
- Standard high-street lending: typically 4.0x to 4.5x gross income.
- Enhanced multiples: 5.0x to 5.5x, generally for household incomes above roughly £60,000–£75,000 with a clean credit profile.
- Specialist lending: up to 6x or more for qualifying professionals or high earners, through specialist and private-bank lenders.
What Actually Happens in a Mortgage Stress Test Today
For years, UK lenders were required to check that you could still afford your mortgage if interest rates rose by a flat 3 percentage points. The Bank of England withdrew that mandatory rule in August 2022, judging that its existing loan-to-income limit already provided enough protection alongside the FCA's own affordability rules.
Lenders still have to stress-test affordability, though. Under FCA rule MCOB 11.6.18R, each lender now sets its own margin above its reversion rate, most commonly somewhere between 1 and 2 percentage points, rather than following one fixed national figure. That margin can move with the wider interest rate environment, so it is worth treating any stress-test result as an estimate rather than a guarantee of what a specific lender will offer.
How to Improve Your UK Mortgage Borrowing Capacity
- Clear small debts first. Paying off credit cards and personal loans before applying frees up income a lender will count toward affordability.
- Consider a longer term. Stretching to a 30 or 35-year mortgage lowers your monthly payment and can help you pass a lender's affordability check, though you will pay more interest overall.
- Grow your deposit. Moving into a lower LTV band, such as 80% or 75%, typically brings access to cheaper rates.
- Tidy up your paperwork. Make sure your name and address match across the Electoral Roll, your credit file and your bank statements, since mismatches slow down or complicate underwriting.
Applying for a Mortgage After a Name Change?
Lenders need official documentation if your ID, passport or bank statements show a different legal name. You can get an official UK Deed Poll online in minutes.
Frequently Asked Questions — UK Mortgage Affordability
How much mortgage can I get on a £50,000 salary in the UK?
With no significant monthly debts, a standard 4.5x multiple on a £50,000 gross salary works out at roughly £225,000. Applicants who qualify for an enhanced multiple through certain lenders could see this rise toward £275,000 at 5.5x, though existing debts and dependents will reduce both figures.
Do student loans affect UK mortgage affordability?
Your outstanding student loan balance is not treated the same way as commercial debt, so it does not directly shrink your borrowing cap. Monthly student loan deductions still reduce your net take-home pay, though, which lenders factor into their wider budget checks.
What is the mortgage stress test, and does it still apply?
Yes, lenders still stress-test affordability, but the rules changed. The Bank of England's mandatory 3-percentage-point stress test ended in August 2022. Lenders now set their own margin above their reversion rate, typically 1 to 2 percentage points, under FCA rule MCOB 11.6.18R.
Can I get a 5.5x or 6x salary mortgage in the UK?
Yes. A number of UK lenders offer enhanced multiples of 5.0x to 5.5x for household incomes above roughly £60,000–£75,000, and specialist or private-bank lenders can go up to 6x or higher for qualifying professionals and high earners with a strong financial profile.