How much can I borrow for a mortgage in the UK? (2026)

The main limit: loan-to-income (LTI)

Most UK lenders cap a mortgage at 4.5 times your gross annual income. "Gross" means before tax, and if you're borrowing with someone else, both incomes are added together first. A single applicant earning £40,000 can typically borrow up to £180,000; a couple earning £40,000 and £30,000 combined (£70,000) can typically borrow up to £315,000.

By 2026 several major lenders offer higher standard multiples – 5.5× is common, and 6× or more shows up for specific profiles (usually higher earners, or professionals such as doctors and accountants with strong future income prospects). These aren't marketing gimmicks; they're priced against the same regulatory ceiling everyone operates under.

The Bank of England's 15% flow limit

Since 2014, the Bank of England has limited how much of any single lender's new mortgage lending can go to borrowers above 4.5× LTI – capped at 15% of that lender's flow. It's a systemic safeguard, not a rule that applies to your individual application, but it explains why higher multiples are often reserved for stronger applicants: lenders ration their 15% allowance.

In April 2026 the Bank of England published a consultation paper proposing to remove the 15% flow limit altogether, arguing that other affordability checks now do the same job. If adopted, high-LTI lending would likely become more widely available rather than rationed to the strongest applicants – worth checking for updates if you're close to the threshold.

The second limit: loan-to-value (LTV) and your deposit

The LTI multiple isn't the only ceiling. Lenders also cap how much of the property price they'll lend against – commonly up to 95%, meaning a 5% deposit is the practical minimum for most mainstream products. Whichever cap produces the smaller loan – LTI or LTV – is the one that applies.

A smaller deposit doesn't just mean a bigger loan relative to the property price – it usually means a worse interest rate too, since rates are tiered by LTV band. Saving from 10% to 15% deposit often moves you into a materially cheaper rate tier.

Worked examples

What replaced the old stress test

Before 2022, lenders were required to check you could still afford the mortgage if rates rose by 3 percentage points above the revert rate. That mandatory stress test was relaxed in August 2022, on the view that the LTI flow limit already provided enough of a buffer against risky lending.

Lenders still assess affordability – they haven't stopped checking your outgoings, dependants, and typical spending – but the mechanical +3pp calculation is no longer a universal requirement. Most calculators, including this one, still show a payment at a higher rate as a useful reference point, even though it's informational rather than a hard pass/fail test.

What a lender actually asks for

The LTI and LTV numbers get you a ballpark. An actual Decision in Principle (sometimes called an Agreement in Principle) checks your credit file and verifies your income and outgoings against the numbers you've given – it can come back lower than the arithmetic suggests if your spending patterns or credit history raise concerns.

1. 1

   Check your credit report

   Get your file from one of the main UK credit reference agencies and fix anything wrong before a lender sees it – errors are common and disputing them takes weeks, not days.

2. 2

   Work out your real number

   Use the LTI and LTV caps above with your actual income, debts and deposit to get a realistic ceiling, not the headline multiple a lender advertises.

3. 3

   Get a Decision in Principle

   This is a soft-search estimate from a specific lender based on your actual details. It's not a binding offer, but it's far more reliable than the general calculation above.

4. 4

   Compare more than the multiple

   A lender offering 5.5× at a worse rate can cost more overall than one offering 4.5× at a better rate. Compare the monthly payment and total cost, not just the maximum loan size.