Watch Your Money Grow with Compound Interest
See exactly how your investments grow over time. Enter your initial amount, regular contributions, and interest rate to calculate your final balance and total interest earned.
Frequently Asked Questions
Simple interest is calculated only on the principal. Compound interest is calculated on the principal plus all previously earned interest. $10,000 at 7% for 30 years: simple = $31,000, compound = $76,000.
Savings accounts typically compound daily or monthly. Term deposits usually compound annually or on maturity. Superannuation returns effectively compound annually. More frequent compounding = faster growth.
High-interest savings accounts offer 4.5-5.5% p.a. in April 2026. Long-term share investments have historically returned 8-10% p.a. Super balanced funds average around 7-8% p.a. over the long term.