How is the monthly mortgage payment calculated?

It uses the standard repayment (capital and interest) amortisation formula M = P*i / (1 - (1+i)^-n), where P is the loan, i is the monthly interest rate and n is the number of monthly payments.

What is LTV (loan-to-value)?

LTV is the loan amount divided by the property price, shown as a percentage. A larger deposit lowers your LTV, which can give access to better mortgage rates.

Does this include fees and insurance?

No. This estimate covers capital and interest repayments only. It excludes arrangement fees, buildings insurance, ground rent and other costs.

UK Mortgage Repayment Calculator

This UK mortgage calculator estimates your monthly repayment and total interest from the loan amount, interest rate and term for repayment mortgages. Updated June 2026.

Mortgage Repayment Estimator

How it works

This is an estimate for a UK capital-and-interest (repayment) mortgage. The loan equals the property price minus your deposit. The monthly payment uses the standard amortisation formula M = P·i / (1 − (1 + i)⁻ⁿ), where i is the monthly interest rate (annual rate ÷ 12) and n is the number of months (years × 12). If the rate is 0%, the payment is simply the loan divided by the number of months. Loan-to-value (LTV) is the loan divided by the property price. This excludes fees, insurance and rate changes.

FAQ

How is the monthly payment calculated? It uses the standard repayment amortisation formula M = P·i / (1 − (1+i)⁻ⁿ), where P is the loan, i is the monthly rate and n is the number of monthly payments.
What is LTV (loan-to-value)? The loan amount divided by the property price, as a percentage. A larger deposit lowers your LTV, which can unlock better rates.
Does this include fees and insurance? No. It covers capital and interest only, and excludes arrangement fees, insurance and other costs.

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