Want to know how much your mortgage will cost each month? Whether you’re buying your first home, moving house or remortgaging, our Mortgage Repayment Calculator gives you an instant monthly estimate based on your loan amount, interest rate, and term.
It’s quick, free, and helps you budget with confidence — before you apply for a mortgage or view a property.
Calculate your monthly mortgage payments and see the complete breakdown
This calculator shows your monthly payments and total mortgage costs. Use the sliders or type directly into the fields to see how changes affect your payments.
| Component | Amount | Percentage |
|---|---|---|
| Principal (Loan Amount) | £250,000 | 59.9% |
| Interest Payments | £166,700 | 39.9% |
| Arrangement Fee | £999 | 0.2% |
| Total Cost | £417,699 | 100% |
Tom and Olivia want to borrow £250,000 over 30 years at 5%. Monthly repayment: £1,342 Total repayment: £483,218 Interest paid: £233,218
Sophie switches from 6.25% to 4.75% on her £180,000 mortgage. New monthly payment: £1,027 She saves over £190/month, or £57,000 over 25 years
Chris chooses a 20-year term instead of 25 years. Monthly is higher, but he saves over £30,000 in interest — the calculator shows him the trade-off clearly.
A: No — this calculator shows core payments only. Speak to us for a full breakdown including lender, legal and valuation fees.
A: No — this version calculates repayments for capital & interest mortgages. We can provide an interest-only version too.
A: This assumes a fixed rate for simplicity. If you’re on a variable or tracker mortgage, your payments may go up or down. We can help assess this in a mortgage review.
A: Yes — many lenders allow you to extend or reduce the term, especially at remortgage. The calculator helps you test the impact of different terms upfront.
A: Not at all — it’s completely anonymous and doesn’t run any checks.
Use our free Mortgage Repayment Calculator now to see what your monthly mortgage will really look like — then let Mortgage Knight help you find the lender and deal that makes it happen.
Straightforward numbers. Friendly advice. No pressure.
