How to use it
- Enter the loan amount in dollars.
- Input the annual interest rate as a percentage.
- Set the loan term in years and hit Calculate.
What it does – The calculator takes your loan amount, annual interest rate and loan term, then instantly shows the monthly payment you’ll need to budget, the total interest you’ll pay over the life of the loan, and the grand total of all payments. Why it matters – Knowing these numbers lets you compare lenders, decide how much you can afford, and plan for extra repayments or refinancing. It also reveals how small changes in rate or term affect your cost, which is essential for smart budgeting. How to read it – The monthly payment is the amount due each month. The total interest is the cost of borrowing beyond the principal. The total of payments is simply the principal plus that interest. All figures are shown in Australian dollars, rounded to the nearest cent, so you can see the real financial impact before you sign any contract.
Pro tips
- Add a small buffer (5‑10%) to cover rounding differences when budgeting.
- Try both 30‑year and 15‑year terms to see interest savings.
- Enter the rate as a whole number (e.g., 5 for 5%).
- Double‑check that the loan amount matches your contract before calculating.
Real-life examples
- First‑time buyer comparing two lenders’ offers.
- Investor estimating cash flow for a rental property loan.
- Homeowner planning to refinance to a lower rate.
Case study
Sarah was unsure which loan would fit her budget. She entered a $500,000 loan at 4.5% for 30 years, saw a $2,533 monthly payment and $410,000 total interest, then tested a 15‑year option and chose the shorter term, saving over $150,000 in interest.