UK Mortgage Calculator 2026 — Monthly Repayments, LTV, Affordability & Stamp Duty

It estimates monthly repayments, total interest, and affordability from your loan amount, interest rate, and term, showing results in GBP (£) for first-time buyers and home movers. The figures are indicative estimates only, not a lender offer or mortgage advice.

It's designed for people in the UK comparing mortgage budgets before applying, letting you test affordability across different rates and terms. Your actual eligibility still depends on income checks, credit score, deposit size, and lender criteria.

The repayment maths is accurate when your inputs are correct. Real mortgages can include fees, product charges, rates that change after a fixed period, and insurance add-ons, so treat the results as estimates and confirm them with lenders or brokers.

You can estimate affordability by comparing expected repayments against your monthly budget. Lenders typically use income multiples and affordability checks, so results vary — it's wiser to test realistic repayment limits than the maximum you could borrow.

The repayment maths is the same, but the buying process and timelines can differ — Scotland especially — and fees, valuation approaches, and legal steps vary by region. The focus here is repayment estimates in GBP (£), not the legal process.

London prices often require larger mortgages, which means higher repayments even at the same interest rate, while Manchester can offer more affordable options, though prices still vary by area. Comparing affordability directly removes the guesswork.

Affordability depends on local house prices, your deposit, and repayments relative to income. Glasgow can be cheaper for many properties, while Birmingham varies widely by neighbourhood — comparing your own numbers in GBP shows the real picture.

A major one is choosing a mortgage on today's low rate without planning for changes after a fixed term. Another is ignoring costs like solicitor fees, survey costs, and maintenance. Plan repayments honestly and budget for the full cost of ownership too.

Not always. A longer term reduces monthly payments but often increases the total interest paid significantly. If you can afford it, a shorter term may cut the long-term cost — comparing both options makes the trade-off clear.

Treat the results as an affordability guide, not a guaranteed approval. Run low, base, and high interest rate scenarios to stress-test your budget, and weigh monthly repayment comfort against long-term total cost together.

It may not include lender arrangement fees, broker fees, early repayment charges, or insurance unless you add them, and it doesn't model variable-rate shifts automatically unless you adjust the rate. Results are indicative estimates for planning only.

FCA guidance encourages borrowers to understand mortgage terms, compare products, and assess affordability before committing. Modelling different rates and terms supports that, but it isn't official FCA advice and doesn't replace professional mortgage guidance.

Bank of England rate changes can influence mortgage rates across lenders, especially variable-rate products. The calculator doesn't predict future rates, but it lets you test repayments under higher or lower rates — updating yearly improves accuracy.

Yes. If you're planning a UK property purchase from overseas, you can estimate repayments in GBP (£) here. Expat mortgages often carry stricter requirements and higher rates depending on residency and income source, so verify the results with specialist lenders.

If your income is in another currency, GBP exchange rate volatility affects your real repayment affordability. Plan in GBP first — that's essential for UK mortgage budgeting — then keep a buffer for FX swings, transfer fees, and timing risk.

Yes. Life events like a job change, childcare costs, or rising energy bills can reduce affordability, and a rate change after a fixed term can cause repayment shock. Stress-testing scenarios helps you avoid over-borrowing.

Yes, because interest rates, home prices, and your income can change over time. An annual recalculation helps you plan refinancing, overpayments, or a home move realistically.

Set a repayment limit that still leaves room for emergency savings and a maintenance buffer, not just the maximum you can pay. Consider a larger deposit, improving your credit score, and comparing several lender products — and consult a qualified mortgage advisor before committing.