How much can I borrow for a mortgage?
What lenders actually offer, why the number on a calculator and the number on your mortgage offer rarely match, and the levers that move it either way.
The short version most people want: a UK lender will usually offer you somewhere between four and four-and-a-half times your annual income. Earn £40,000 and that’s roughly £160,000 to £180,000. But that headline figure is the start of the conversation, not the end of it — and the gap between what the multiple suggests and what a lender will actually put in writing is where most surprises live.
The quick answer
Most UK lenders cap borrowing at 4 to 4.5× your gross annual income — about £180,000 on a £40,000 salary, or £270,000 for a couple earning £60,000 between them. A strong profile with a 15%+ deposit can push that to 5–5.5×, and a handful of lenders now stretch to 6× for higher earners. Your real limit is whichever is lower: the income multiple, or what the lender’s affordability test says you can repay each month.
Two numbers decide it, not one
People treat “how much can I borrow” as a single calculation. It isn’t. Lenders run two separate checks and then hand you the smaller of the two answers.
The first is the income multiple — the headline 4 to 4.5× figure. It’s a blunt cap, easy to understand, and it’s the number that gets quoted everywhere. The second is the affordability assessment, which is far more personal: the lender looks at what actually lands in your account, subtracts your committed outgoings, and works out whether the monthly repayment is comfortable even if rates climbed. You get the lower of the two. For most ordinary applicants the income multiple is the binding limit. But the moment you carry a car loan, child maintenance, or a chunky credit card balance, the affordability test quietly takes over — and the multiple becomes academic.
That 15% rule is worth understanding because it explains a lot of frustrating mortgage conversations. The Financial Conduct Authority doesn’t ban high-multiple lending — it just rations it. No regulated lender can let more than 15% of its mortgages exceed 4.5 times income in any quarter. So lenders treat their above-4.5× capacity like a scarce resource, reserving it for the strongest applicants. That’s why your friend on the same salary got 5× and you got 4.3×: same income, different lender appetite that month.
The income-multiple ready reckoner
Here’s the rough borrowing range across common salaries, using the standard multiples. These are illustrative ceilings, not promises — your deposit, debts and credit history all pull the real figure around. Use them to sanity-check whether a property is even in the ballpark before you go further.
| Annual income | At 4× | At 4.5× | At 5.5× (strong profile) |
|---|---|---|---|
| £30,000 | £120,000 | £135,000 | £165,000 |
| £40,000 | £160,000 | £180,000 | £220,000 |
| £50,000 | £200,000 | £225,000 | £275,000 |
| £60,000 | £240,000 | £270,000 | £330,000 |
| £80,000 (joint) | £320,000 | £360,000 | £440,000 |
For a joint application, lenders add both incomes together before applying the multiple — though they tend to be slightly more cautious with two incomes than one, on the reasonable logic that two people are more likely to see one income disrupted by redundancy, a career break, or a baby.
What moves the number up — and down
The multiple is the frame. These four levers decide where inside that frame you land.
Deposit size
Bigger deposit, lower loan-to-value, better risk profile — and some lenders unlock higher multiples above a 15% deposit. It’s the single most controllable lever.
Existing debts
Car finance, loans and credit cards reduce the affordable monthly repayment directly. A £300/month car payment can knock tens of thousands off your limit.
Credit history
It rarely changes the multiple, but it changes which lenders will say yes at all — and the best multiples sit with the lenders fussiest about credit.
Employment type
Permanent salaried applicants get the cleanest treatment. Self-employed and contractors can borrow just as much, but need two to three years of accounts to prove it.
The catch worth knowing: dependants count against you. Each child is an extra mouth the affordability model feeds, so a couple earning £60,000 with three kids will be offered noticeably less than the same couple with none. It feels unfair when you’re the one raising the next generation of taxpayers, but the lender is only modelling cashflow, not morality.
The stress test, and why your limit recently grew
Even after the multiple and the affordability sums, lenders apply a stress test: could you still pay if your mortgage rate jumped a few percentage points above today’s? For years this was the hidden brake — a rule designed after the 2008 crisis to stop banks lending to people who’d drown the moment rates rose.
That brake was loosened. Following clarified Bank of England and FCA guidance in early 2025, most major lenders — Santander, Lloyds, HSBC, NatWest, Nationwide among them — eased the notional rate they test you against. The practical effect: many borrowers can now be offered somewhere in the region of £30,000 to £35,000 more than the same profile would have got a year earlier. Nationwide went further still, extending six-times-income lending to home movers and remortgagers in early 2026, not just first-time buyers.
There’s a quieter shift behind the scenes too. In 2025 the FCA opened a review of the whole mortgage rulebook, asking whether the current affordability framework still fits a market where plenty of renters comfortably pay more each month than the mortgage they’re refused would cost. Nothing’s been changed at the rulebook level yet, but the direction of travel is clear: the door to borrowing a little more is being held open, not slammed.
A worked example
Couple, £62,000 combined, £40,000 deposit, one car loan
The multiple suggested £279k of borrowing, but the car loan pulled the affordable figure down before they’d even started. Clear that car finance and the same couple jumps back to the full multiple — exactly the kind of trade-off worth modelling before you apply.
That’s the recurring lesson: the headline number is easy, but your number is the one that survives the affordability test. The fastest way to find it is to run your own figures rather than read someone else’s average.
Common questions
How many times my salary can I borrow for a mortgage?
Most UK lenders cap borrowing at 4 to 4.5 times your gross annual income. A strong financial profile — typically meaning a deposit of 15% or more and clean credit — can stretch this to 5 or 5.5 times, and a small number of lenders now offer up to 6 times income for higher earners or specific professions.
Why can’t I borrow 4.5× my income even though that’s the rule?
The 4.5× figure is a maximum, not a guarantee. The FCA limits any lender to advancing no more than 15% of its mortgages above 4.5 times income each quarter, so lenders ration their high-multiple capacity for the strongest applicants. Separately, the affordability assessment may cap you below the multiple if you have existing debts or high outgoings — you’re always offered the lower of the two figures.
Does a bigger deposit let me borrow more?
Yes, in two ways. A larger deposit lowers your loan-to-value ratio, which improves your risk profile and unlocks better rates. Some lenders also reserve their higher income multiples for applicants with a deposit above 15%. A bigger deposit doesn’t change your income, but it can change which multiple a lender is willing to apply to it.
How do existing debts affect how much I can borrow?
Monthly debt commitments — car finance, personal loans, credit card balances — reduce your affordable monthly repayment directly, which lowers the maximum loan. As a rough guide, lenders treat a few percent of your outstanding debt as a monthly servicing cost and subtract it from what you can afford. A £300-a-month car payment can reduce your borrowing limit by tens of thousands of pounds.
Can self-employed people borrow as much as employees?
Yes — the same income multiples apply. The difference is proof. Self-employed applicants typically need two to three years of certified accounts or SA302 tax calculations to evidence their income, whereas an employee can show three months of payslips. With solid accounts, a self-employed borrower’s limit is calculated the same way as anyone else’s.
Has it got easier to borrow more recently?
For many borrowers, yes. After the Bank of England and FCA clarified stress-testing guidance in early 2025, most major lenders eased the notional rate they test affordability against. The result is that a typical borrower can often be offered around £30,000 to £35,000 more than the same profile would have secured a year earlier, though the exact figure varies by lender and circumstances.
What’s the difference between this and a mortgage affordability calculator?
This guide explains the rules — how income multiples, stress tests and affordability assessments interact to set your limit. A mortgage affordability calculator applies those rules to your specific income, deposit and debts to produce a personal figure. Read the guide to understand the why; use the calculator to get your number.
Related tools & guides
How we put this together
Borrowing limits are based on standard UK lender income multiples (4–4.5× as the common cap, up to 5.5–6× for strong profiles) and the FCA’s rule limiting lending above 4.5× income to 15% of a lender’s quarterly mortgage book.
Affordability and stress-test points reflect Bank of England and FCA guidance, including the easing of notional stress-test rates adopted by major lenders. Figures are illustrative ranges; an individual offer depends on the specific lender, your full financial profile and prevailing rates.
We review this guide against current lending rules and refresh it when the regulatory framework or typical lender criteria change.