Mortgage Repayment & Amortisation Calculator

Figure out your monthly and annual mortgage repayments, and see how much you could save by making overpayments.

The following assumptions are used for the calculations:

Overpayment allowance is based on the outstanding balance at the start of each calendar year (using original schedule for estimation).

Overpayments result in a reduction in the mortgage term, not in the monthly payment (unless the loan is paid off early).

For percentage-based overpayments, "Max 10%" refers to the input for a single percentage overpayment setting, typically aligned with annual allowances.

Reach out to john at collectmykeys co.uk for feedback or suggestions.