Mortgage Loan Repayment Calculator UK | Calculate Monthly Payments
Instantly estimate your monthly mortgage repayments. Adjust the property price, deposit, interest rate, and loan term to find the right deal for your budget.
How to Use Our UK Mortgage Calculator
Enter Your Property Price
Input the price of the home you want to buy or the value of the property you are remortgaging.
Adjust Your Deposit & Term
Set your deposit amount (or percentage) and choose a loan term between 5 and 35 years.
Compare Rates & Payment Types
Enter the interest rate and toggle between repayment and interest-only to see your monthly cost.
Understanding Your Monthly Mortgage Repayments
Your monthly mortgage repayment is made up of two parts: the interest charged by the lender and a portion of the capital (the amount you borrowed). On a standard repayment mortgage, the calculation uses the loan amount, the annual interest rate, and the number of monthly payments to produce a fixed monthly figure that clears the debt by the end of the term.
The key factors that influence your monthly payment are the loan-to-value (LTV) — the proportion of the property price you are borrowing — the interest rate, and the loan term. A longer term lowers your monthly payment but increases the total interest you pay over the life of the mortgage. A larger deposit reduces your LTV, which typically qualifies you for lower interest rates.
Our calculator uses the standard UK amortisation formula to give you an instant, accurate estimate. The amortisation preview table shows how your balance reduces year by year and how much of each payment goes towards interest versus capital — helping you understand the true cost of borrowing before you speak to a broker.
Compare Mortgage Rates with an Independent UK Broker
Online calculators give you a useful estimate, but the exact rate you qualify for depends on your credit profile, income, and deposit. As an independent, whole-of-market broker, SBS Finance searches 90+ UK lenders to find the deal that matches your circumstances — often at rates lower than those advertised on the high street.