Mortgage Repayment Calculator
Calculate your monthly home loan repayments, total interest and compare principal & interest vs interest-only options.
Disclaimer
This calculator provides estimates for general information purposes only. Results should not be relied upon as professional financial, tax, or legal advice. Tax rates and thresholds are based on publicly available ATO data and may change. Always consult a qualified tax agent or financial adviser for advice specific to your circumstances.
Frequently Asked Questions
What is the average mortgage interest rate in Australia?
What is the difference between principal and interest vs interest only?
How much deposit do I need for a home loan?
What is Mortgage Repayment?
A mortgage repayment calculator shows how much you'll pay each month on a home loan, including both principal (the amount you borrowed) and interest (the cost of borrowing).
How this calculator works
This calculator uses the standard amortisation formula used by Australian banks. For principal and interest loans, each monthly payment is the same amount, but the split between principal and interest changes over time — early payments are mostly interest, while later payments are mostly principal. The amortisation chart visualises this progression. For interest-only loans, you only pay the interest each month and the loan balance doesn't decrease. The calculator also compares both options so you can see the total cost difference.
All calculations are performed in your browser — your data never leaves your device. Results are for general guidance only and should not be considered professional financial advice.
Built and maintained by Konstantin Iakovlev. Data sourced from the ATO and official Australian government sources.