Compound Interest Calculator AU
See how savings grow with compound interest and regular contributions.
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Year-by-year growth
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How it works
Compound interest earns returns on both your original money and the returns already added. Adding a regular monthly contribution accelerates growth further over time.
A = P(1 + r/n)^(nt) + contributions compounded monthly- Longer time horizons benefit most from compounding
- More frequent compounding gives slightly higher growth
- The donut shows how much of your final balance is interest vs money you put in.
Frequently asked questions
What is compound interest?
Interest earned both on your original amount and on the interest already added, so growth accelerates over time the more frequently it compounds.
How often should interest compound?
More frequent compounding (monthly vs yearly) gives slightly higher returns. The calculator lets you pick the frequency to compare.
Compound Interest Calculator for Australia
Compound interest is interest earned on both your original money and the interest it has already generated — which is why savings and investments can grow faster over time. This calculator shows how a starting amount plus regular contributions could grow in AUD, helping savers and investors in Australia picture the long-term effect of their plan.
How to use it
Enter your initial deposit, any regular monthly or yearly contribution, the expected annual return and the number of years. The tool projects the future value in A$ and separates how much came from your own contributions versus compound growth.
Why compounding matters
- Starting earlier gives money more time to compound.
- More frequent compounding (monthly vs yearly) slightly increases growth.
- Regular contributions can outweigh a higher one-off deposit over long periods.
More questions
What return should I assume?
Use a realistic figure for your situation in Australia. Cash savings rates are usually low, while long-term investments carry more risk and potentially higher returns. Projections are estimates, not guarantees.
Does it account for tax or inflation?
No — it shows nominal growth before tax and inflation. Your real spending power may be lower, so factor those in when planning.
Results are estimates for general guidance in Australia and may not reflect the latest local rates, fees or rules. Check official sources before making decisions.