Tax Calendar Calculators Factsheets Tax Rates & Allowances Downloadable Forms News and Reports Useful Links Mortgage calculator Enter the details for your mortgage below and press the calculate button. Mortgage amount (£): The mortgage amount required. Repayment period: The number of years for which the mortgage is taken out. Interest rate (%): The mortgage interest rate applicable. Note: These calculations are only for illustrative purposes and are not a substitute for professional advice. Results Monthly repayment: £0.00 Interest only: £0.00 Clear