How much can I borrow for a mortgage in 2026?
The short answer most people get is “four and a half times your income”. It is a reasonable starting point and it is wrong often enough to cost you a house. Here is what actually determines the number, and what you can do about it.
In this guide
The three layers that set your limit
Your borrowing limit is not one rule. It is three separate systems stacked on top of each other, and they interact in ways that explain why two lenders can look at identical payslips and land £80,000 apart.
Layer one is the Bank of England. Its Financial Policy Committee caps how much of any lender's new residential lending can sit at 4.5 times income or above: no more than 15% of new lending in any quarter. This is a limit on the lender's book, not on you. It explains why higher multiples exist but are rationed and rarely advertised.
Layer two is the FCA. Its conduct rules require every lender to verify your income, assess your committed expenditure, and apply a forward-looking interest rate stress test. This is where affordability, rather than income multiple, does the work.
Layer three is the individual lender's risk model. Each one produces its own income multiple, its own stress margin and its own expenditure benchmark. This layer is where the variation lives, and it is the main reason a whole-of-market broker earns their fee.
Income multiples in 2026: 4× to 6.5×
The headline multiple is the fastest way to a rough number. Multiply your household income, add your deposit, and you have an approximate purchase price. Run it properly on the affordability calculator.
| Multiple | Who gets it | On £50,000 income |
|---|---|---|
| 4.0× | Complex income, adverse credit, some smaller lenders | £200,000 |
| 4.5× | The high-street default for most applicants | £225,000 |
| 5.0× | Lower LTV, clean credit, stable employment | £250,000 |
| 5.5× | Standard from several major lenders for strong profiles | £275,000 |
| 6.0× | Professional schemes: doctors, solicitors, accountants | £300,000 |
| 6.5× | NatWest joint applications, combined income above £150,000 | £325,000 |
The jump from 4.5× to 5.5× on a £50,000 income is £50,000 of extra buying power, the difference between two very different houses. It is worth finding out which lenders will consider you at the higher end before you assume the standard answer applies.
What lenders subtract before they lend
Lenders do not apply the multiple to your gross salary. They apply it to what is left after commitments, and the deductions are more aggressive than most people expect.
- Committed credit. Car finance, personal loans, credit card minimum payments and buy-now-pay-later agreements. The common convention is to annualise the monthly payment and remove it from assessable income. A £350 a month car PCP removes £4,200 a year, which at 4.5× is £18,900 less to spend on a house.
- Dependants. Each child reduces assessable income through the lender's expenditure benchmark, typically by £3,000 to £6,000 of borrowing capacity per child, though the mechanism differs by lender.
- Childcare costs. Treated as committed expenditure by most lenders and deducted directly. For families paying nursery fees this is often the single largest deduction.
- Maintenance payments and any court-ordered obligations.
- Ground rent and service charge on a leasehold property, deducted from the affordability calculation on the property you are buying.
The one that surprises people. An unused credit card limit can count against you with some lenders, which assess a notional minimum payment on the available limit rather than the balance. If you have three cards with £15,000 of unused limit, closing the ones you do not need can measurably improve your position. Do it at least three months before applying so your credit file reflects it.
The stress test nobody mentions
Passing the income multiple is not enough. The lender then recalculates your monthly payment at a higher rate to check you could still cope, and this is where applications quietly fail.
In 2026 lenders set their own stress rates, generally landing between 6% and 8% depending on the lender and the product. A five-year fixed rate often attracts a softer stress test than a two-year fix, because the borrower is protected from rate movement for longer, which is a real and under-discussed reason to consider a five-year deal if you are borrowing near your limit.
The practical effect: you can be declined at a monthly payment that is lower than the rent you are demonstrably already paying, because the lender is testing you at 8% rather than at 5.09%. It feels absurd. It is also the rule that stopped 2008 repeating.
Six things that shrink your maximum
- Recent job changes. Most lenders want three to six months in the role, or a signed contract with a start date. Probation periods are a common decline reason.
- Self-employment under two years. Two years of accounts or SA302s is the standard requirement. Some lenders accept one year; the rate and multiple are usually worse. A falling second-year profit is typically assessed on the lower figure, not the average.
- Variable pay treated conservatively. Bonus and overtime are counted at 50 to 100% depending on the lender and how consistent the history is. If a large part of your income is variable, lender choice matters enormously.
- Adverse credit. A missed payment in the last six months narrows your options sharply. Defaults and CCJs push you towards specialist lenders with higher rates and lower multiples.
- Age at the end of the term. Most lenders cap the term at age 70 to 75, some at retirement age. If you are 45, a 40-year term is usually not available, which raises the monthly payment and tightens affordability.
- The property itself. Flats above commercial premises, short leases under 70 years, non-standard construction and new-build flats all attract lower maximum LTVs, a property-side limit that has nothing to do with your income.
How to increase what you can borrow
- Clear short-term credit first. Paying off a car finance agreement with £4,000 outstanding can unlock £15,000 to £20,000 of borrowing. Check whether that trade is worth it in your situation, and often it is.
- Extend the term. Moving from 25 to 35 years lowers the monthly payment enough to pass tighter stress tests. It costs far more in lifetime interest, so plan to overpay later. See what that does on the overpayment calculator.
- Increase the deposit. It does not raise the multiple, but a lower LTV gets a cheaper rate, which lowers the stressed payment and helps affordability pass.
- Evidence your variable pay properly. Two years of payslips showing consistent bonus gets counted far more generously than a P60 alone.
- Use a whole-of-market broker. This is the highest-leverage step for anyone with non-standard income. Knowing which of forty lenders treats contractor day rates, or company director dividends, or a second job most generously is exactly what they are for.
Three worked examples
A first-time buyer on £38,000 with £20,000 saved
No debts, no dependants. At 4.5× that is £171,000 of borrowing and a £191,000 purchase price. At 5.5× with a lender who likes their profile, £209,000 and a £229,000 price. Stamp duty as a first-time buyer at that level is nil, so the £20,000 is genuinely a deposit rather than being eaten by tax. Their real constraint is the 90% LTV rate of around 5.31%.
A couple on £72,000 combined with £300 a month of car finance
The car finance removes £3,600 a year, so £68,400 is assessed. At 4.5× that is £307,800. Clearing the car finance before applying would restore about £16,200 of capacity. With a £60,000 deposit they are looking at roughly £368,000 of property, or £384,000 if the car is cleared.
A self-employed applicant on £95,000 declared profit
Two years of accounts, but year one was £60,000 and year two £95,000. Some lenders average the two, giving £77,500 assessed, while others use the most recent year. That is the difference between £348,750 and £427,500 at 4.5×, from the identical set of accounts. This is the clearest illustration of why the lender you choose can matter more than the multiple itself.
Do this next: run your own numbers on the affordability calculator, which applies the multiple, deducts your committed credit and stress-tests the payment. Then check the monthly cost on the mortgage repayment calculator and the one-off tax on the stamp duty calculator.