Calculate Your Monthly Mortgage Payments with Our Free UK Mortgage Calculator
Our mortgage calculator helps you work out exactly what your monthly repayments will be, based on your loan amount, interest rate, and borrowing term.
How to use: Mortgage Calculator UK | Monthly Payment & Interest
Our calculator uses the standard mortgage repayment formula to determine your monthly payment amount. The calculation takes your total loan amount, applies your interest rate (expressed as an annual percentage rate), and divides this across your chosen term in months. The formula accounts for compound interest, meaning each monthly payment covers both capital and accrued interest. By inputting your loan amount in pounds, your annual interest rate, and your mortgage term in years, the calculator instantly shows your monthly payment obligation. This gives you a clear picture of your financial commitment and helps you plan your budget accordingly. The calculation remains accurate whether you're looking at a standard 25-year mortgage or a shorter 15-year term.
Consider a first-time buyer in Manchester purchasing a flat for £250,000 with a 15% deposit and a 4.5% interest rate over 25 years—your monthly payment would be approximately £1,195. Alternatively, a London homeowner remortgaging £400,000 at 5.2% over 20 years would face monthly payments of around £2,440. For those in the Midlands buying a property worth £180,000 with 20% down at 4.8% interest over 30 years, monthly repayments would be roughly £755. These examples show how location, deposit size, and interest rates significantly affect your monthly outgoings.
Always remember that your monthly payment shown here covers only capital and interest—it doesn't include Council Tax, buildings insurance, or conveyancing fees. When shopping for mortgages, check whether your lender offers a fixed or variable rate, as this affects long-term costs. It's worth running the calculator multiple times with different interest rates to understand how rate changes impact affordability. Many homeowners overlook overpayment options—some lenders allow additional payments that reduce your term and save thousands in interest. Get a proper mortgage offer before committing, as calculators provide estimates only.