Simple Interest Loan Calculator
Calculates interest on a flat-rate or simple interest loan.
Your result
Estimate only. Results update as you type.
How this calculator works
Interest = principal × rate × years.
Worth knowing
A flat rate looks cheaper than it is. The effective rate is close to double because you pay interest on money already repaid.
Guides for this calculator
- Simple Interest Loan Calculator Explained for Australians
- Simple Interest Loan Mistakes Australians Make and How to Avoid Them
Questions
- What is a comparison rate?
- It combines the interest rate and most fees into one annual rate, usually based on a $30,000 loan over five years, to make loans easier to compare.
- Do the results include fees?
- Only where a fee input is shown. Add any known fees for a more realistic total.
- Where can I get help with debt?
- The National Debt Helpline (1800 007 007) offers free, confidential financial counselling.
This calculator gives general estimates using published Australian rates and formulas. It doesn’t consider your personal circumstances. Check current figures with the ATO, your state government or a qualified professional before making decisions. See our disclaimer.