How much can I borrow for a mortgage?
The income multiple gets you close. The affordability assessment decides.
Lenders answer this with an affordability assessment rather than a simple multiple, but a multiple still gets you close enough to plan with. Here is how the number is actually built.
The rough guide
- Typical maximum: around 4 to 4.5 times gross annual income.
- Sometimes higher: up to 5–5.5× for higher earners, certain professions, or specific lender schemes.
- Joint applications usually use combined income, though the multiple applied may be slightly lower.
- The multiple is a ceiling, not a target. Affordability checks often bring the offer below it.
What lenders actually assess
Since the post-2014 affordability rules, lenders must satisfy themselves that you can afford the payments — including if rates rise. In practice they look at:
- Verified income. Basic salary counts fully; bonus, overtime and commission are often only partly counted. Self-employed applicants usually need two to three years of accounts.
- Committed outgoings. Loans, car finance, credit card balances, childcare, school fees. A car finance agreement can reduce borrowing capacity by a surprising amount.
- Dependants. Each one increases assumed essential spending.
- A stress test. Lenders check the payments would still be affordable at a materially higher interest rate than the one you are being offered.
Deposit changes the price, not just the size
Your deposit determines the loan-to-value band, and rates step down at 90%, 85%, 80% and 75% LTV. Moving from a 10% deposit to 15% can reduce your interest rate meaningfully, which over a full term is often worth more than the extra deposit itself. If you are close to a band boundary, waiting to cross it is frequently the highest-return decision available to you.
Check the monthly payment at your figure
Once you have a borrowing estimate, the number that matters is the monthly repayment — and the total interest across the term.
Open the mortgage calculator →Borrowing capacity is not a budget
The maximum a lender will offer and the amount you should borrow are different questions. The lender's stress test asks whether you would survive the payments; it does not ask whether you would still be able to pension-save, replace a car, or absorb a period on reduced income.
A practical sanity check: work out the monthly payment at the top of your range, then look at what remains from your take-home pay after it. If that remainder leaves nothing for saving, the number is too high whatever the lender says.
Four things that raise your number
- Clear consumer debt before applying. Removing a car finance payment can lift borrowing capacity by several times the annual cost of the debt.
- Do not open new credit in the months before applying.
- Check your credit file early and correct errors — they take time to fix.
- Use a whole-of-market broker. Criteria vary enormously between lenders, and the one your bank uses may not be the one that suits your income shape.
Coming to the end of a fixed rate? Remortgaging is where most homeowners save the most, and some services pay cashback on completion. Check remortgage options → Your home may be repossessed if you do not keep up repayments. Advertising — we may earn a commission.
A note on rate changes
Whatever you borrow, most UK mortgages fix for two to five years and then revert to a higher standard variable rate. The remortgage at the end of that fix is where a large amount of money is won or lost, and it is worth diarising three to six months before the fix ends rather than letting it lapse.
Common questions
How much can I borrow on a UK mortgage?
Most lenders cap borrowing at roughly 4 to 4.5 times gross annual income, with some going to 5–5.5× for higher earners or specific schemes. The final offer depends on an affordability assessment covering your outgoings, dependants and a stress test at a higher interest rate.
Does a car finance agreement reduce how much I can borrow?
Yes, often significantly. Committed monthly outgoings are deducted before affordability is calculated, so clearing consumer debt before applying can materially increase your borrowing capacity.
How much deposit do I need?
5% is the usual minimum for many lenders, but rates improve at each loan-to-value band — typically 90%, 85%, 80% and 75%. A larger deposit lowers both the loan and the rate you pay on it.
Should I borrow the maximum I'm offered?
Not usually. The lender's assessment tests whether you could survive the payments, not whether you would still be able to save, replace a car, or handle a drop in income. Check what is left from your take-home pay after the payment before deciding.