UK mortgage affordability calculator
How much can you borrow at 4×, 4.5× or 5× income — and what is left after the monthly payment.
How much you could borrow
£202,500
Max price £242,500 with this deposit · £1,126 / month
- Household income
- £45,000
- Left after payment
- £1,868
- SDLT at max price (England & NI)
- £2,350
Lenders cap most borrowing at 4–4.5× income. Not an offer. Stress tests and credit are omitted.
4.5× income, 4.5% rate, 25 years, £40k deposit
| Salary | Max loan | Monthly | Left from take-home |
|---|---|---|---|
| £30,000 | £135,000 | £750 | £1,343 |
| £40,000 | £180,000 | £1,000 | £1,693 |
| £50,000 | £225,000 | £1,251 | £2,043 |
| £60,000 | £270,000 | £1,501 | £2,279 |
| £80,000 | £360,000 | £2,001 | £2,745 |
FAQs
- How much can I borrow on a £45,000 salary?
- About £202,500 at 4.5×. With a £40,000 deposit the max price is £242,500. Lenders still stress-test the payment.
- Does this include stamp duty?
- Yes — SDLT for England and Northern Ireland at the max price. Scotland (LBTT) and Wales (LTT) are not covered.
- Is 4.5× guaranteed?
- No. Most high-street lenders sit at 4–4.5×. Credit, outgoings and the stress rate can cut the offer.