Interest-Only vs Principal and Interest Calculator
Compares interest-only repayments with principal and interest over the life of a loan.
Your result
Estimate only. Results update as you type.
How this calculator works
IO repayment = loan × rate ÷ 12. When the IO period ends, the full loan is repaid over the shorter remaining term.
Worth knowing
Repayments jump when an interest-only period ends. Budget for the higher amount before you start.
Guides for this calculator
- Interest-Only vs Principal and Interest Calculator Explained for Australians
- Interest-Only vs Principal and Interest Mistakes Australians Make and How to Avoid Them
Questions
- Do these calculators match what my bank will say?
- Lenders use their own models, expense benchmarks and policies. Use these results to prepare, then speak to a lender or broker.
- Are stamp duty rates current?
- Duty thresholds are indexed or changed regularly. Always confirm with your state revenue office before relying on a figure.
- Is this financial advice?
- No. The calculators give general estimates only and don’t consider your objectives or financial situation.
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.