Use this free mortgage calculator online to estimate your monthly mortgage payment in the UK. Enter the property price, deposit, interest rate, and mortgage term to calculate an estimated monthly repayment.
The calculator also shows how much principal and interest you pay over each year, helping you compare different mortgage scenarios before planning your home purchase.
Calculate Your Monthly Mortgage Repayments
Your monthly mortgage repayment depends on the amount you borrow, your interest rate, and the length of your mortgage term. This UK mortgage calculator estimates the monthly principal-and-interest payment for a standard repayment mortgage with a fixed interest rate.
Change the property price, deposit, interest rate, or term to see how the estimated repayment changes. A larger deposit generally means borrowing less, while a longer mortgage term usually lowers the monthly repayment but can increase the total interest paid over the life of the loan.
Compare Mortgage Deposits and Interest Rates
Your deposit reduces the amount you need to borrow against the property. For example, compare different deposit amounts to see how a smaller mortgage balance may affect your monthly repayments. You can also test different interest rates to understand how a change in borrowing costs may affect your budget.
The rate you qualify for depends on your lender, loan-to-value ratio, credit profile, mortgage product, and other eligibility criteria. Use the calculator for comparisons rather than treating the result as a mortgage offer.
Understand Your Mortgage Amortisation
This online calculator provides a yearly breakdown of principal repaid, interest paid, and the remaining mortgage balance. Select a year to see how your repayments are allocated during that period.
At the beginning of a typical repayment mortgage, a larger share of each payment goes towards interest. As the outstanding balance decreases, more of the payment generally goes towards repaying the principal. Reviewing the yearly figures can help you understand how your mortgage balance changes over time.
Plan Your UK Home-Buying Budget
Use this free online calculator to explore repayment scenarios before deciding which property price or mortgage term may suit your circumstances. Remember that your overall housing costs can also include buildings insurance, maintenance, utilities, service charges, ground rent where applicable, and other property-related expenses.
The calculator estimates principal and interest only. It does not determine how much a lender will let you borrow or include every homeownership expense. Actual payments may differ because of mortgage fees, rate changes, product terms, and lender requirements.
Frequently Asked Questions
Calculation Methodology & Data Transparency: This interactive tool was developed by Ratiranjan Singha using standard financial amortization algorithms. Estimated rates, limits, and guidelines are benchmarked against public data from primary institutions, including the CFPB and Freddie Mac. Results are provided for educational and estimation purposes only.
