Mortgage Repayment Calculator
Monthly repayments, total interest, LTV and a year-by-year schedule.
✓ updated June 2026
Results are estimates for information only, not financial advice. See how we build and verify our calculators.
Enter the property price, your deposit, the interest rate and the term to see your monthly repayment on a standard capital-and-interest mortgage, along with the loan amount, loan-to-value (LTV) and total interest over the life of the loan. Open the year-by-year schedule to see how early payments are mostly interest — the key fact behind overpayment and remortgage decisions.
How to use the Mortgage Calculator
- Enter the property price and your deposit (down payment).
- Set the interest rate and the mortgage term in years.
- Read your monthly repayment, LTV and total interest.
- Open the year-by-year schedule to see principal vs interest over time.
Frequently asked questions
How is the monthly repayment calculated?
With the standard amortization formula on a reducing balance: each payment covers that month's interest plus some principal, so the interest share shrinks every month while the principal share grows.
What is LTV and why does it matter?
Loan-to-value is the loan as a percentage of the property price. Lower LTV bands (90%, 85%, 75%, 60%) unlock cheaper interest rates — a slightly bigger deposit can cut your rate meaningfully.
Do overpayments help?
Yes — money paid early hits the balance when interest is at its highest, so even small regular overpayments cut years and a lot of interest. Check your deal's overpayment allowance (often 10% per year without penalty).
Does this include taxes and insurance?
No — it computes principal and interest only. Add buildings insurance, any property taxes and fees on top for a full cost picture.