BRYME Money · Tool
Mortgage payment calculator
Loan amount, rate and term in — the monthly payment, how the first payment splits between interest and principal, and the total interest across the term. Add an extra monthly payment to see what it buys.
A repayment mortgage blends interest (charged on the outstanding balance) with principal (the loan actually shrinking) into one monthly figure. Because interest is charged on the balance, the first payment is almost all interest and the last is almost all principal — which is why extra payments made early are disproportionately powerful. This tool runs the standard amortisation arithmetic on your numbers, on your device. How the machine works end to end is in how mortgages work; the deposit that sets the loan size is planned in the house deposit guide. Everything runs in your browser; nothing is stored or sent to BRYME.
How to read the output
Monthly payment is the standard amortisation figure: the amount that clears the loan exactly at the end of the term at a fixed rate. The first-month split shows the shape of the whole schedule — early interest dominates, and the share flips as the balance falls. Total interest is what the loan costs beyond the amount borrowed; compare it across terms before choosing one. The extra-payment line simulates adding a fixed amount on top of the scheduled payment every month and reports the earlier finish and the interest saved. Figures exclude taxes, insurance and fees, which vary by lender and jurisdiction — this is arithmetic, not lending advice, and results are not guaranteed.