Calculator
Mortgage Repayment Calculator
Estimate your monthly mortgage repayment, the total interest you'll pay over the term, and your loan-to-value. Enter the property price, your deposit, the interest rate and the mortgage term.
Monthly repayment
£1,417
Loan of £255,000 · 85% LTV
Total interest
£170,212
Total repaid
£425,212
Estimate on a capital-repayment basis. Actual offers depend on lender criteria and affordability checks.
Frequently asked questions
How is my monthly mortgage repayment calculated?
On a repayment (capital and interest) mortgage, each monthly payment covers the interest for that month plus a portion of the capital, calculated so the loan is fully repaid over the term. Our calculator uses the standard amortisation formula based on your loan amount, interest rate and term.
What is a good loan-to-value (LTV)?
LTV is the loan as a percentage of the property price. Lower LTVs (larger deposits) usually unlock better interest rates. Sub-60% LTV typically accesses the best deals, while 90-95% LTV mortgages carry higher rates.
Does this include interest-only mortgages?
No. This calculator assumes a repayment mortgage. On interest-only deals your monthly cost is lower but the capital is not repaid over the term and remains owed at the end.
For general guidance only, not financial advice. Figures are estimates. Verify with a qualified adviser or GOV.UK.