📈 Compound Interest

$500 at 7% for 5 Years

Investing $500 at 7% annual compound interest for 5 years grows to $701. That's $201 earned in interest on top of your original $500.

If you want to adjust the return assumption, extend the timeframe, or add regular contributions, use the compound interest calculator.

If you want the plain-English explanation behind the numbers, read our guide to compound interest.

Compound Interest Calculator
Australia 2026
$
%
$
Total value after 5 years
$701
Amount invested$500
Interest earned$201
Interest multiplier1.40×
Year-by-year growth
YearBalanceInterest
Yr 1$535+$35
Yr 2$572+$37
Yr 3$613+$40
Yr 4$655+$43
Yr 5$701+$46
Final balance after 5 years
$701
Invested
$500
Interest earned
$201
Multiplier
1.40×

How $500 grows at 7%

Compound interest earns returns on your returns — not just your original investment. At 7% per year, your money doubles every 10.3 years (the Rule of 72). Over 5 years, that compounds to a 1.40× multiplier.

In year 1, $500 earns $35 in interest. By year 5, the annual interest has grown to $46 — because each year's interest is calculated on a larger balance.

This is why longer holding periods matter so much. The later years do more of the heavy lifting, especially once the balance is large enough to generate bigger dollar returns each year.

$500 for 5 years at different rates
RateFinal balanceInterest earnedMultiplier
4%$608$1081.22×
5%$638$1381.28×
6%$669$1691.34×
7% ◀$701$2011.40×
8%$735$2351.47×
9%$769$2691.54×
10%$805$3051.61×

Year-by-year projection

YearBalanceInterest this yearTotal interestGrowth
Year 1$535+$35$351.07×
Year 2$572+$37$721.14×
Year 3$613+$40$1131.23×
Year 4$655+$43$1551.31×
Year 5$701+$46$2011.40×

Growth chart

Balance growth over 5 years
$175$351$526$701Yr1Yr5
Principal
Interest earned

Frequently asked questions

Related compound interest scenarios

Use these nearby examples to compare what changes when you keep the same starting balance, extend the investing period, or test a more aggressive return assumption.

Compound interest guide and tools

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