UK Mortgage Affordability (2026/27)
UK mortgage affordability 2026/27 - the 4.5x loan-to-income flow limit, lender stress tests, first-time buyer schemes and how self-employed income is assessed.
How UK lenders decide how much you can borrow in 2026/27: the 4.5 times loan-to-income flow limit, the affordability stress test, the schemes open to first-time buyers, and how self-employed income is evidenced.
4.5 times income, by income
The arithmetic only: a lender's actual offer depends on its affordability model, your outgoings and credit file, and can be lower or, at some lenders, higher.
| Gross income | Applicants | 4.5 times income |
|---|---|---|
| £35,000 | Single applicant | £157,500 |
| £50,000 | Single applicant | £225,000 |
| £60,000 | Joint (£30,000 + £30,000) | £270,000 |
| £100,000 | Joint (£60,000 + £40,000) | £450,000 |
Related guides
- Mortgage Affordability Calculator - check your maximum loan.
- UK Lifetime ISA 2026/27 - saving for a first-home deposit.
- Self-employed and contractor mortgages - evidence lenders ask for.
- UK Stamp Duty Rules - SDLT on purchase.
- First-Time Buyer SDLT Checklist - first-time buyer relief.
Frequently asked questions
What is the 4.5x loan-to-income limit?
Since 2014 the Bank of England Financial Policy Committee has recommended that lenders make no more than 15% of their new residential mortgages at a loan-to-income ratio of 4.5 or higher. It is a limit on a lender's share of lending, not a cap on any one borrower, which is why most mortgages stop at around 4.5 times income while some lenders offer more to selected applicants. Whether you can get above 4.5 times depends on the lender, your income and your credit profile.
What happened to the mortgage stress test?
The FPC's Recommendation that lenders test affordability at 3 percentage points above the reversion rate was withdrawn with effect from 1 August 2022. The FCA's responsible-lending rules in MCOB still apply: unless the rate is fixed for 5 years or more, lenders must allow for likely future interest rate rises when assessing affordability. In March 2025 the FCA reminded firms of the flexibility they have within that rule (MCOB 11.6.18R). Each lender now sets its own stress rate within those rules.
How do lenders assess self-employed income?
Most ask for two or more years of figures evidenced by HMRC SA302 tax calculations and the matching tax year overviews, or by accounts; some accept one year. Sole traders are usually assessed on net profit, often an average or the lower of recent years. Company directors are usually assessed on salary plus dividends, and some lenders also consider their share of retained profit. Some lenders assess contractors on an annualised day rate. Criteria vary a great deal between lenders, which is why a broker who knows the market can help.
What is Joint Borrower Sole Proprietor (JBSP)?
A mortgage where more than one person is named as a borrower and liable for the repayments, but only one is on the legal title as owner. It is commonly used by parents helping an adult child: their income counts towards affordability, but they do not own the property. The non-owning borrowers carry the liability without any share of the equity, so take independent legal advice, and get tax advice on how the arrangement affects Stamp Duty Land Tax and any later change of ownership.
What schemes help first-time buyers?
First Homes (England only): new or resale homes at 30% to 50% below market value for first-time buyers with income up to £80,000 (£90,000 in London) who can get a mortgage for at least half the price. Lifetime ISA: save up to £4,000 a year with a 25% government bonus (up to £1,000 a year), usable towards a first home costing £450,000 or less. Shared ownership: buy a share of between 10% and 75% and pay rent on the rest. The Help to Buy Equity Loan is no longer open in England, though it can still be applied for in Wales.
Are interest-only residential mortgages still available?
Yes, but lenders must be satisfied you have a credible strategy to repay the capital at the end of the term, such as investments or the sale of another property, and many set minimum income or equity levels. Retirement interest-only mortgages for older borrowers are repaid when the property is sold, usually on death or a move into care. Lifetime mortgages (equity release) are a separate product.
In what order should I approach a mortgage?
(1) Check your credit file with the main credit reference agencies and correct errors. (2) Build a deposit; a larger deposit usually opens lower rates. (3) Get a decision in principle to see roughly what lenders will offer. (4) Use a broker if your income is complex - self-employed, contracting, bonuses - or your credit history is mixed. (5) Make the full application once an offer on a property is accepted, with the survey and conveyancing running alongside.