Mortgage affordability calculator
Estimate how much you could borrow, the house price that puts you in, and what the monthly repayment would look like. Built on typical UK lender income multiples.
Selling a home? Include your sale proceeds, moving costs and purchase tax in your next-home budget.
Loans, car finance, credit cards, childcare.
You could afford up to
£242,500
£202,500 borrowing + £40,000 deposit (16% deposit)
84% loan-to-value · 16% deposit
- Monthly repayment
- £1,026
- Share of income
- 27%
- Household income
- £45,000
Comfortable — repayments under 30% of income
Breakdown
- Borrowing (4.5x household income)
- £202,500
- Deposit
- £40,000
- Maximum purchase price
- £242,500
- Loan-to-value
- 84%
- Monthly repayment at 4.5% over 30 years
- £1,026
- First payment — interest
- £759
- First payment — capital repaid
- £267
- Total interest over the full term
- £166,874
- Stress test at 7.5%
- £1,416/mo (38% of income)
Indicative only and not financial advice or a lending decision. Lenders assess credit history, employment type, outgoings and deposit source, and stress-test repayments at a higher rate.
From this home to your next
Work out what a sale could leave you, then keep money back for the next purchase. Enter your own figures, including fees and any early repayment charge. Zero means no allowance for that cost. Use the funds available to your buying household; include money due to another owner in other sale costs.
Confirm the correct tax treatment with your conveyancer. Buying before your old home sells can mean higher tax and a separate funding gap. This calculation assumes sale money is available on completion. Special reliefs, shared ownership, lease-rent tax and any Capital Gains Tax on the sale are excluded.
Add your sale, savings or borrowing figures to see the calculation.
Planning estimate, not a valuation, mortgage offer or tax advice. Monthly costs exclude insurance, utilities, service charges and other household spending. Check the official SDLT rates. Rates reviewed 2 November 2026.
Affordability questions
Most UK lenders advance between 4 and 4.5 times your gross annual income, and up to 5.5 times for higher earners or professional schemes. Regular credit commitments — loans, car finance, credit cards and childcare — reduce the amount, because lenders stress-test whether you could still pay if rates rose.
Your maximum purchase price is the amount you can borrow plus your deposit. A 10% deposit is the usual minimum for mainstream products, and rates improve noticeably at 15%, 20% and 25% deposits. Remember to keep money back for stamp duty, legal fees, a survey and removals.
No. It is an indicative estimate based on the assumptions you enter, not a credit decision or advice. A lender will assess your credit file, employment type, deposit source and outgoings. Speak to a lender or broker for an agreement in principle and confirm the terms of any mortgage offer.
Letting agents usually want an annual household income of around 30 times the monthly rent, and most budgeting guidance suggests keeping rent under 35% of your take-home pay. A guarantor or rent paid in advance is commonly accepted if you fall short of the income test.