Last reviewed: May 2026
Mortgage affordability determines how much you can borrow. Lenders assess your income, committed expenditure and credit profile — then stress-test the result at higher rates. This guide explains every factor, with income multiple tables, examples, and links to detailed guides for your specific situation.
Initial discussion free. A broker fee of £299 is payable if you proceed.
Most lenders lend 4 to 4.5 times your gross annual income. On £35,000 that is approximately £140,000 to £157,500. Your actual offer will be lower if you have student loans, car finance, credit card debt or other committed payments. All lenders also stress-test affordability at a higher rate than the product — typically 6% to 7% — which can further reduce the maximum available.
The starting point for most mortgage lenders is an income multiple — a fixed multiplier applied to your gross annual income to set a maximum borrowing figure. This is then reduced by committed expenditure and stress-tested at higher rates before a final figure is confirmed.
| Gross Annual Income | At 4x income | At 4.5x income | At 5x income | Notes |
|---|---|---|---|---|
| £25,000 | £100,000 | £112,500 | £125,000 | 5x typically requires specialist lender |
| £30,000 | £120,000 | £135,000 | £150,000 | Standard range for most FTBs |
| £35,000 | £140,000 | £157,500 | £175,000 | |
| £40,000 | £160,000 | £180,000 | £200,000 | |
| £50,000 | £200,000 | £225,000 | £250,000 | Some lenders offer up to 5.5x at this income |
| £60,000 | £240,000 | £270,000 | £300,000 | Professional mortgages may apply |
| Joint £30k + £25k | £220,000 | £247,500 | £275,000 | Combined income increases capacity significantly |
These figures are indicative and based on gross income multiples only. Actual mortgage offers depend on committed expenditure, credit profile, deposit size, lender criteria and stress-test outcomes. Subject to individual lender assessment. These figures do not constitute a quotation.
Some lenders offer 5 to 5.5 times income for specific professions — including doctors, dentists, lawyers, accountants, engineers, pilots and senior public sector employees — provided the applicant has a clean credit profile, a deposit of at least 10 to 15%, and stable employment. Some lenders also offer enhanced multiples for earners above £75,000. As a whole-of-market mortgage broker, we identify which lenders are likely to offer higher multiples for your specific income profile and profession.
Lenders deduct committed monthly payments from your income before calculating affordability. The more you pay out each month on loans, car finance and credit cards, the less you can borrow.
Each £100 of monthly committed expenditure reduces your maximum borrowing by roughly £15,000 to £20,000, depending on the lender and their affordability model. These are the most common types and their typical impact.
For detailed guidance on your specific situation, see the relevant spoke guides below. As a whole-of-market mortgage broker, we consider mortgages from across the market to identify lenders whose affordability model is most favourable for your specific income and commitments, subject to lender criteria and product availability.
Even after calculating affordability based on your income and commitments, lenders must confirm you could sustain the mortgage payments if interest rates were to rise. This is called stress testing.
Lenders assess whether you can afford the monthly mortgage payment at a rate typically 2% to 3% above the product rate, or at a minimum floor rate of around 6% to 7% — whichever is higher. On a £200,000 mortgage: at 5.0% the monthly repayment is approximately £1,199. At 7.5% it is approximately £1,480. Lenders confirm you have sufficient income, after all committed expenditure, to cover the stressed payment. If you cannot, the maximum borrowing may be reduced until the stress test passes.
The practical effect is that applicants close to their income multiple ceiling may receive a lower maximum offer than the multiple alone suggests. Stress testing is most likely to constrain borrowing where the applicant has significant committed expenditure reducing disposable income. Understanding this before application allows realistic property budgeting.
A joint mortgage application combines both applicants' incomes for the affordability assessment, typically allowing significantly higher borrowing than either applicant could achieve alone. Both applicants' committed expenditure and credit profiles are assessed, and both are equally liable for the full mortgage payment.
Joint tenants own the property equally and the surviving owner inherits the other's share automatically. Tenants in common own specified shares (e.g. 60/40) and can leave their share to anyone in their will. For unmarried couples with unequal deposits, tenants in common with specified shares is often more appropriate. A solicitor confirms the right ownership structure for your circumstances.
Friends buying together can also make a joint application. The key considerations are: agreeing ownership percentages, planning how to handle a sale if one party wants to exit, and understanding the legal implications of joint borrowing. See our joint mortgage with friends guide for full details.
A larger deposit improves affordability in two ways: it reduces the loan amount (so monthly payments are lower, improving the stress test), and it gives access to lower interest rates (which also reduce monthly payments and improve the stress test further).
| Deposit | LTV | Rate access | Affordability effect |
|---|---|---|---|
| 5% | 95% | Fewer lenders, higher rates | Most constrained — highest monthly payment |
| 10% | 90% | Most mainstream lenders | Materially better rates than 95% LTV |
| 15% | 85% | Strong lender range | Good rates, some lenders offer higher multiples |
| 20%+ | 80% or below | Best available rates | Most favourable affordability position |
Different income types and commitments are assessed differently by lenders. Select the guide that matches your circumstances.
Full income multiple guide with lender-by-lender comparisons and profession-specific higher multiple options.
How much can I borrow?How student loan repayments affect affordability across all repayment plans, with lender-by-lender assessment approaches.
Mortgage with a student loanHow hire purchase and PCP payments reduce borrowing and whether settling before application improves your position.
Mortgage with car financeCombining incomes with a friend to buy together — ownership structures, exit planning and legal considerations.
Joint mortgage with friendsOptions for buyers on lower incomes — higher multiple lenders, joint applications, shared ownership and government schemes.
Mortgage on a low incomeHow outstanding credit card balances are assessed and strategies to improve affordability before application.
Mortgage with credit card debtCall 01422 354011 or use the form below. We review your income, commitments and credit profile and identify which lenders are likely to offer the best outcome for your specific application.
Get an Affordability Assessment
The information on this page is for general guidance only and does not constitute regulated mortgage advice. Regulated mortgage advice is provided only after assessing your individual circumstances, needs and objectives. Income multiple figures and borrowing estimates are indicative only and do not account for credit assessment, lender-specific criteria, or stress-testing outcomes.
Who this may be less suitable for: Buyers who have not yet resolved significant adverse credit history; those whose committed expenditure leaves insufficient disposable income to pass a lender's stress test at the borrowing level required; or those with income sources that most lenders would not include in full.
Foreseeable harm: Overestimating borrowing capacity before property search can lead to wasted time, abortive costs, and disappointment. A realistic affordability assessment before viewing properties is strongly recommended.
As a whole-of-market mortgage broker, we consider mortgages from across the market, subject to lender criteria and product availability. Woodhall Mortgages is authorised and regulated by the Financial Conduct Authority (FRN 762513). Our broker fee of £299 is payable if you choose to proceed following a formal mortgage offer. This fee is non-refundable once charged.
Call 01422 354011 or use the form below. As a whole-of-market mortgage broker, we review your income, commitments and credit profile and identify the lenders most likely to offer the best outcome for your specific application.
Initial discussion free. A broker fee of £299 is payable if you choose to proceed following a formal mortgage offer. This fee is non-refundable once charged. We may also receive commission from the lender. Your home may be repossessed if you do not keep up repayments on your mortgage.
Get an Affordability AssessmentFinancial promotion: This page is a financial promotion. Woodhall Mortgages is authorised and regulated by the Financial Conduct Authority (FRN 762513). As a whole-of-market mortgage broker, we consider mortgages from across the market, subject to lender criteria and product availability. Not all lenders or products may be included.
General information: Income multiple tables and borrowing estimates on this page are indicative only and do not constitute a mortgage offer, quotation or commitment to lend. Actual mortgage offers depend on individual income, affordability assessment, credit profile, lender criteria and current interest rates.
Broker fee: A broker fee of £299 is payable if you choose to proceed following a formal mortgage offer. This fee is non-refundable once charged. We may also receive commission from the lender.
Your home may be repossessed if you do not keep up repayments on your mortgage.
Buying a home or reviewing your mortgage can feel complicated, but it doesn’t have to be. A quick conversation can give you clarity on your options, your budget, and the next realistic steps. There is no obligation and no pressure, just straightforward guidance tailored to you. Complete the short form below and we will be in touch to help you move forward with confidence.
