📈 Compound Interest

$2,000 at 4% for 5 Years

Investing $2,000 at 4% annual compound interest for 5 years grows to $2,433. That's $433 earned in interest on top of your original $2,000.

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
$2,433
Amount invested$2,000
Interest earned$433
Interest multiplier1.22×
Year-by-year growth
YearBalanceInterest
Yr 1$2,080+$80
Yr 2$2,163+$83
Yr 3$2,250+$87
Yr 4$2,340+$90
Yr 5$2,433+$94
Final balance after 5 years
$2,433
Invested
$2,000
Interest earned
$433
Multiplier
1.22×

How $2,000 grows at 4%

Compound interest earns returns on your returns — not just your original investment. At 4% per year, your money doubles every 18 years (the Rule of 72). Over 5 years, that compounds to a 1.22× multiplier.

In year 1, $2,000 earns $80 in interest. By year 5, the annual interest has grown to $94 — 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.

$2,000 for 5 years at different rates
RateFinal balanceInterest earnedMultiplier
4% ◀$2,433$4331.22×
5%$2,553$5531.28×
6%$2,676$6761.34×
7%$2,805$8051.40×
8%$2,939$9391.47×
9%$3,077$1,0771.54×
10%$3,221$1,2211.61×

Year-by-year projection

YearBalanceInterest this yearTotal interestGrowth
Year 1$2,080+$80$801.04×
Year 2$2,163+$83$1631.08×
Year 3$2,250+$87$2501.12×
Year 4$2,340+$90$3401.17×
Year 5$2,433+$94$4331.22×

Growth chart

Balance growth over 5 years
$608$1k$2k$2kYr1Yr5
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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