The income multiple: your starting point
The quickest way to estimate your borrowing is to multiply your gross annual income (your pay before tax) by a lender's income multiple. In 2026 the typical range is 4 to 4.5 times income. So someone earning £40,000 a year might borrow somewhere around £160,000 to £180,000 before any other factors are weighed up.
Some lenders stretch further. Borrowers with higher incomes, or people in certain professions such as doctors, accountants, solicitors and teachers, can sometimes access 5 to 5.5 times income through specialist or professional mortgage deals. These larger multiples are not offered to everyone and usually depend on a strong credit record, a decent deposit and stable earnings.
The income multiple is only a headline figure. It tells you roughly what is on the table, but the lender still has to check that you can actually afford the repayments before agreeing to lend that much.
Indicative borrowing at 4.5 times income
The table below shows a rough guide to the maximum you might borrow at 4.5 times income for a range of salaries. For joint applications, add both incomes together first. These are indicative 2026 figures to give you a feel for the numbers, not an offer.
| Annual income | Indicative max at 4.5x |
|---|---|
| £25,000 | £112,500 |
| £30,000 | £135,000 |
| £40,000 | £180,000 |
| £50,000 | £225,000 |
| £60,000 (e.g. joint) | £270,000 |
| £70,000 (e.g. joint) | £315,000 |
| £90,000 (e.g. joint) | £405,000 |
What lenders check beyond the multiple
Since the affordability rules brought in after the financial crisis, lenders cannot rely on income multiples alone. They have to be satisfied that the mortgage is genuinely affordable, so they build a picture of your monthly finances.
The affordability assessment usually looks at your regular outgoings and commitments, and subtracts them from your income to see what is left for a mortgage payment.
- ▸Credit commitments: Loans, car finance, credit card balances and buy-now-pay-later arrangements all reduce how much a lender will offer.
- ▸Childcare and dependants: The cost of childcare and the number of children or other dependants you support are factored in.
- ▸Regular household costs: Utilities, council tax, insurance, travel and other committed spending are estimated or taken from your bank statements.
- ▸Existing financial promises: Maintenance payments, pension contributions and any student loan repayments can all be counted.
The stress test: can you afford a higher rate?
Under the FCA's affordability rules, lenders must check that you could still keep up repayments if interest rates rose. This is called stress testing. Rather than only working out the payment at today's rate, the lender applies a higher notional rate to make sure there is a cushion if your deal ends and rates have climbed.
In practice this means your affordability is judged against a payment that is higher than the one you would actually start on. If a mortgage looks affordable at today's rate but not at the stressed rate, the lender will offer you less or decline. The exact stress rate varies between lenders and changes with the wider interest-rate picture, so two lenders can reach different answers on the same application.
There is one flexibility worth knowing about. The rules on the overall share of high loan-to-income lending that banks can do (the LTI flow limit) were eased during 2024 and 2025. That gives lenders a bit more room to approve loans above 4.5 times income, though it does not change the affordability test you personally still have to pass.
Joint applications, deposit and debts
Applying with someone else usually increases your borrowing because both incomes are counted. A couple earning £35,000 each has a combined income of £70,000, which at 4.5 times could support a loan of around £315,000. Bear in mind that both applicants' debts and credit records are assessed too, so a strong earner can be held back by a partner's heavy commitments.
Your deposit matters in two ways. First, a bigger deposit means you need to borrow less overall. Second, it lowers your loan-to-value, or LTV, which is the size of your loan as a percentage of the property price. A lower LTV usually unlocks better interest rates, and a cheaper rate can slightly improve how much you can afford because the monthly payment is lower.
Your credit score and history shape both whether you are approved and the rate you are offered. Missed payments, defaults or heavy use of credit can reduce your options. If you are self-employed, lenders typically want two to three years of accounts or tax calculations and may average your profits, which needs a bit more preparation. That is a topic in its own right, so it is worth reading up on the self-employed route separately if it applies to you.
A worked example
Take a single applicant, Priya, earning £40,000 a year with no debts and a clean credit record. At 4.5 times income she could borrow around £180,000. If she has a £250 monthly car finance payment, the lender may treat that as reducing her affordability and offer closer to £160,000 to £170,000 instead.
Now take a couple, Sam and Alex, with a combined income of £70,000, one small credit card balance and no children. At 4.5 times income they might borrow around £315,000. If they cleared the credit card and put down a larger deposit to reach a lower LTV, they could keep the full multiple and secure a better rate at the same time.
The gap between these outcomes shows why the multiple is only the beginning. Two applicants on the same income can end up with very different offers once outgoings, debts, deposit and the stress test are taken into account. Use these numbers as a guide, then get a decision in principle to see real figures for your situation.
Frequently Asked Questions
How much can I borrow on a £30,000 salary? On a £30,000 income you could typically borrow around £120,000 to £135,000 in 2026, based on 4 to 4.5 times income, though your final figure depends on your outgoings, debts and the lender's affordability check.
Can I borrow 5 times my income? Some lenders do offer 5 to 5.5 times income, often for higher earners or people in certain professions with a strong credit record and a reasonable deposit, but it is not available to everyone and you still have to pass the affordability and stress tests.
Does my deposit change how much I can borrow? A larger deposit lowers your loan-to-value, which usually earns you a better interest rate, and a cheaper monthly payment can slightly improve your affordability, so a bigger deposit can help you borrow a little more as well as costing less.
Do lenders count my partner's debts on a joint application? Yes, on a joint application both applicants' incomes and both applicants' debts and credit records are assessed together, so one person's loans or credit card balances can reduce the amount you are offered as a couple.
Will a bonus or overtime count towards my mortgage? Lenders often include only part of variable pay such as bonuses, overtime or commission, and some ask to see a track record over one or more years, so check with the lender rather than assuming the full amount will count.
Key Takeaways
- ✓Most UK lenders offer around 4 to 4.5 times your annual income in 2026, with some reaching 5 to 5.5 times for higher earners or certain professions.
- ✓Income multiples are only a starting point; lenders also assess your outgoings, debts, childcare and credit commitments before agreeing a figure.
- ✓The FCA affordability rules require a stress test, checking you could still pay if interest rates rose, so your approved amount may be lower than the raw multiple suggests.
- ✓Joint applications usually boost borrowing because both incomes count, but both applicants' debts and credit records are assessed too.
- ✓A bigger deposit lowers your loan-to-value, which typically unlocks better interest rates and can modestly improve affordability.
- ✓Clearing debts before applying can meaningfully raise your maximum loan, since regular commitments reduce what lenders count as available for a mortgage.