Estimate your principal-and-interest or interest-only repayments by loan amount, rate, term and frequency — and see the total interest the structure carries.
What this calculator estimates
This tool turns a loan amount, an interest rate and a term into the repayment you would actually make — monthly, fortnightly or weekly. It uses the standard amortising-loan formula every lender works from, so a principal-and-interest result here will sit close to what a bank quotes on the same inputs. Switch to interest-only and it shows the lower repayment that period costs you, alongside the balance that is still owing when it ends.
What drives the number
Three things move the repayment: how much you borrow, the rate, and the term. A longer term lowers each repayment but lifts the total interest paid; a higher rate does the opposite to your cash flow. Repayment frequency matters too — paying fortnightly rather than monthly squeezes a little more principal down each year. The figure that often gets overlooked is the total interest: two loans with the same repayment can carry very different lifetime costs depending on how they are structured, when interest-only reverts to principal-and-interest, and which lender's rate and fees sit underneath.
Use it as a starting point
Treat the result as a reference point, not a quote. The repayment a lender approves depends on their rate, fees and how the loan is built around your circumstances — and that structure is usually where the real saving lives. Book a strategy session and we will run your actual numbers and the structure that fits 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).