Mortgage on a £45,000 Salary: What Can You Borrow in 2026/27?
A worked case study of how much mortgage a £45,000 salary can support in the UK, covering income multiples, stress testing, take-home pay and deposit requirements.
How Much Can a £45,000 Salary Borrow?
Income multiples are the starting point most people use to estimate mortgage affordability, though every lender applies its own combination of income multiple and affordability stress test. Using two commonly cited illustrative benchmarks:
| Income multiple | Borrowing capacity on £45,000 |
|---|---|
| 4.5x | £202,500 |
| 5.0x | £225,000 |
A 4.5x multiple is the more conservative and widely available figure across mainstream lenders. A 5x multiple is sometimes available to borrowers with strong overall affordability, a solid credit history and often a larger deposit, but it shouldn't be assumed as a default. You can run your own numbers, including your specific outgoings, through the Mortgage Affordability Calculator.
Take-Home Pay and Monthly Affordability
Before assessing what's comfortable, it helps to know what a £45,000 salary actually delivers after deductions. Using illustrative 2026/27-style tax and National Insurance thresholds, a £45,000 salary produces roughly £35,920 in annual take-home pay, or about £2,993 a month.
On a £202,500 mortgage at 5% over 25 years, the monthly repayment works out to approximately £1,184 using the Mortgage Calculator. That represents around 40% of estimated take-home pay — within the range most lenders and most borrowers would consider manageable, though this doesn't account for other debts, childcare, or general living costs, which lenders also factor into their own affordability assessment.
Stress Testing at a Higher Rate
Lenders don't just check whether you can afford the rate you're being offered — they check whether you could still afford repayments if rates rose. Using an illustrative stress rate of around 8% on the same £202,500 loan:
| Scenario | Rate | Monthly repayment |
|---|---|---|
| Offered rate | 5.0% | £1,184 |
| Stress-tested rate | ~8.0% | ~£1,564 |
This roughly £380 monthly increase under stress testing is why some borrowers who look affordable at the headline rate are offered less than the income multiple alone would suggest — the stress test, not the multiple, often ends up being the binding constraint.
Deposit Requirements at Different LTVs
The deposit needed alongside a £45,000-salary mortgage depends on the target property price and loan-to-value. For an illustrative £250,000 property:
| Deposit | LTV | Deposit amount |
|---|---|---|
| 5% | 95% | £12,500 |
| 10% | 90% | £25,000 |
| 15% | 85% | £37,500 |
A larger deposit generally unlocks meaningfully better rates, since lower-LTV lending carries less risk for the lender. It's worth checking whether stretching to a 10% or 15% deposit, rather than the minimum 5%, produces a rate saving that outweighs the extra cash needed upfront.
A Fully Worked Example
Putting the pieces together: a single applicant on £45,000, borrowing £202,500 (4.5x salary) with a £25,000 deposit (10%), buying a property at £227,500. At 5% over 25 years, the mortgage costs approximately £1,184 a month. If the purchase qualifies for first-time buyer relief (available up to £625,000 purchase price, with 0% SDLT up to £425,000), there would be no stamp duty due at all on this purchase, since £227,500 sits comfortably within the tax-free first-time buyer band. Check the Stamp Duty Calculator to confirm SDLT for your own purchase price and buyer status.
Frequently asked questions
How much mortgage can I get on a £45,000 salary?
Using an illustrative 4.5x income multiple, a £45,000 salary supports borrowing of roughly £202,500. At a more generous 5x multiple, sometimes offered to lower-risk borrowers, this rises to around £225,000. The actual amount offered by any given lender also depends on affordability stress testing, existing debts and credit history.
What's the monthly repayment on a mortgage from a £45,000 salary?
On a £202,500 mortgage at 5% over 25 years, the monthly repayment is approximately £1,184. That's roughly 40% of the estimated £2,993 monthly take-home pay on a £45,000 salary, which is within the range most lenders would consider comfortably affordable, though individual outgoings are also assessed.
What deposit do I need with a £45,000 salary?
For a property priced at £250,000, a 5% deposit is £12,500 (95% LTV), a 10% deposit is £25,000 (90% LTV), and a 15% deposit is £37,500 (85% LTV). A larger deposit generally unlocks better mortgage rates, so it's worth checking whether a slightly higher deposit meaningfully improves the rate on offer.
What is my take-home pay on a £45,000 salary?
After income tax and National Insurance, a £45,000 salary works out to approximately £35,920 a year, or around £2,993 a month, using 2026/27-style personal allowance and NI thresholds as an illustrative basis. Pension contributions, student loan repayments or other deductions would reduce this further.
Can a single person on £45,000 buy a house alone?
Yes, particularly in lower-cost regions of the UK — a £202,500 mortgage (4.5x salary) plus a modest deposit could realistically buy a property in the £220,000–£240,000 range. In higher-cost areas such as London and the South East, £45,000 alone is unlikely to stretch to typical local property prices without a larger deposit or a joint application.
How does affordability stress testing affect a £45,000 salary mortgage?
Lenders typically check whether you could still afford repayments if the interest rate rose several percentage points above the rate you're being offered. On a £202,500 loan, moving from 5% to a stressed rate of around 8% would push the monthly repayment up from roughly £1,184 to about £1,564, and the lender needs to be satisfied that figure remains affordable against your income.
Does a £45,000 salary qualify for first-time buyer stamp duty relief?
Stamp duty relief depends on the purchase price, not your salary. If you're a first-time buyer purchasing at or below £425,000, you pay no SDLT at all; between £425,000 and £625,000, you pay 5% on the portion above £425,000. Above £625,000 the relief doesn't apply and standard rates are charged on the full price.
Is 4.5x or 5x salary more realistic on £45,000?
4.5x is a more conservative and widely available benchmark across most mainstream lenders, giving roughly £202,500. A 5x multiple, giving around £225,000, tends to be reserved for borrowers with strong affordability, a larger deposit, or in specific professional mortgage schemes, so it shouldn't be assumed as a default figure.
How much does a joint application change things versus a £45,000 solo salary?
Adding a second applicant on, say, another £30,000 would bring combined income to £75,000, which at a 4.5x multiple could support borrowing of around £337,500 — considerably more than the £202,500 available on £45,000 alone, since most lenders assess joint applications against combined income rather than requiring both incomes to separately qualify.
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