Australian Loan Calculator
Compounding Repayments · Extra Savings · Real-time Amortisation
Calculate your home, car, or personal loan repayments. Add extra lump sums or ongoing payments to see how much interest and loan term you save. All calculations are executed securely in your browser.
Extra Repayments
Model the impact of voluntary payments
Toggle extra repayments to simulate accelerated paydown speed, calculating aggregate interest and timeline reductions instantly.
Estimated Repayment Outcomes
at 6% over 30 years
over 360 intervals
First Repayment Composition
Amortisation
First 12 Cycles| # | Principal | Interest |
|---|---|---|
| 1 | $298.65 | $1,500.00 |
| 2 | $300.14 | $1,498.51 |
| 3 | $301.65 | $1,497.01 |
| 4 | $303.15 | $1,495.50 |
| 5 | $304.67 | $1,493.98 |
| 6 | $306.19 | $1,492.46 |
| 7 | $307.72 | $1,490.93 |
| 8 | $309.26 | $1,489.39 |
| 9 | $310.81 | $1,487.84 |
| 10 | $312.36 | $1,486.29 |
| 11 | $313.92 | $1,484.73 |
| 12 | $315.49 | $1,483.16 |
Rate Sensitivity
Loan Types Explained
- Fixed Rate: Locked rate for 1–5 years — certainty and stability.
- Variable Rate: Moves with the RBA cash rate — flexibility with offset accounts.
- Split Loan: Part fixed, part variable — balance both worlds.
- Interest Only: Pay just interest for a set period — popular with investors.
Before You Borrow
- Aim for a 20% deposit to avoid Lenders Mortgage Insurance (LMI).
- Check your credit score — lenders use it to set your rate.
- Reduce existing debts to improve your borrowing capacity.
- Explore First Home Owner Grant (FHOG) or stamp duty concessions.
Money-Saving Tips
- Switch to fortnightly payments — equivalent to one extra month per year.
- Use an offset account to reduce the daily interest calculated.
- Make extra repayments whenever possible — even small amounts help.
- Review and refinance annually — a 0.5% rate cut saves thousands.
Disclaimer: This calculator provides repayment estimates for illustrative purposes only and does not constitute financial advice. Calculations are based on constant interest rates over the selected loan term and assume payments occur at the exact selected interval. Real bank fees, split structures, and loan setup costs are excluded. Always consult a licensed mortgage broker or financial adviser before making commercial borrowing decisions.
Frequently Asked Questions
Understanding Loan Repayments & Compounding Interest in Australia
How Bank Interest Compounds & Amortises
In Australia, bank mortgage and personal loan interest is calculated on your outstanding daily loan balance and charged at regular monthly intervals. When making structured payments, a portion of each repayment goes toward the interest charges, while the rest directly reduces the outstanding principal balance. This process is called loan amortisation. In the early stages of a 30-year home loan, the vast majority of your regular payments cover the compound interest, leaving the principal to pay down very slowly.
The Power of Fortnightly & Weekly Payment Cycles
Switching your repayment cycle from monthly to fortnightly is one of the easiest ways to pay off a mortgage faster. Because there are 26 fortnights in a calendar year, paying half the monthly repayment every two weeks results in the equivalent of 13 full monthly payments every 12 months. This additional payment directly reduces your loan principal, compounding your long-term interest savings and cutting years off your total loan term.
Save Thousands with Extra Repayments & Offsets
Making even small extra repayments can have a huge impact on your debt lifecycle. Every extra dollar you contribute immediately reduces the principal on which your future daily interest is calculated. This creates a powerful snowball effect that significantly reduces the total interest paid over the life of the loan. Utilizing offset accounts (linked transaction accounts that balance out your mortgage balance before interest is calculated) delivers the exact same mathematical benefits while keeping your savings fully accessible.
100% Client-Side Privacy & Data Security
At DailyUtil, your privacy and digital security are our highest priorities. Unlike other financial calculators that send your salary inputs and financial variables to external servers for calculations, our Australian Loan Calculator performs 100% of all calculations locally in your browser. Absolutely zero personal data, salary figures, or deductions are transmitted over the network or saved to any backend database. You can calculate your finances with complete peace of mind.