See how much interest and time an extra monthly repayment cuts from your home loan — and why an offset structure can do the same job while keeping the funds accessible.
What the extra repayments calculator estimates
Every dollar paid above your contracted repayment goes straight onto the loan principal, and because interest is charged on the balance each month, a smaller balance compounds in your favour. This tool estimates two numbers that matter: how much interest you avoid over the life of the loan, and how many years sooner the loan clears. Enter your current balance, your rate, the term you have left, and the extra amount you would add each month. The result updates as you type.
What actually drives the saving
The leverage comes from time and rate, not the size of the extra payment alone. The same extra dollar saves far more on a higher rate and on a loan with decades still to run, because it has longer to compound. That is why a modest extra repayment made early can outperform a larger one made late. One structural point worth weighing: an offset account often achieves the same interest reduction as an extra repayment, but the money stays available to you rather than being locked into the loan. Whether you redraw, offset, or simply pay down depends on your cash-flow needs and how your facility is built — a policy question, not a verdict.
Use it as a starting point
Treat the figure as a guide to the shape of the decision, not a fixed promise. Real outcomes shift with rate movements, fees, and how consistently the extra is maintained. The more useful conversation is how to structure the loan so the saving is durable and the funds stay flexible. Book a strategy session and we will run your real numbers and the right structure around them.
General information only — not personal financial product or credit advice. The estimate is indicative and depends on each lender's policy, current rates and your full circumstances. AeFin is an Australian Credit Representative (CR 464548) of Finsure (ACL 384704).