📈 Compound Interest
$10,000 at 9% for 20 Years
Investing $10,000 at 9% annual compound interest for 20 years grows to $56,044. That's $46,044 earned in interest on top of your original $10,000.
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 20 years
$56,044
Amount invested$10,000
Interest earned$46,044
Interest multiplier5.60×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $10,900 | +$900 |
| Yr 2 | $11,881 | +$981 |
| Yr 3 | $12,950 | +$1,069 |
| Yr 4 | $14,116 | +$1,166 |
| Yr 5 | $15,386 | +$1,270 |
| Yr 6 | $16,771 | +$1,385 |
| Yr 7 | $18,280 | +$1,509 |
| Yr 8 | $19,926 | +$1,645 |
| Yr 9 | $21,719 | +$1,793 |
| Yr 10 | $23,674 | +$1,955 |
| Yr 11 | $25,804 | +$2,131 |
| Yr 12 | $28,127 | +$2,322 |
| Yr 13 | $30,658 | +$2,531 |
| Yr 14 | $33,417 | +$2,759 |
| Yr 15 | $36,425 | +$3,008 |
| Yr 16 | $39,703 | +$3,278 |
| Yr 17 | $43,276 | +$3,573 |
| Yr 18 | $47,171 | +$3,895 |
| Yr 19 | $51,417 | +$4,245 |
| Yr 20 | $56,044 | +$4,627 |
Final balance after 20 years
$56,044
Invested
$10,000
Interest earned
$46,044
Multiplier
5.60×
How $10,000 grows at 9%
Compound interest earns returns on your returns — not just your original investment. At 9% per year, your money doubles every 8 years (the Rule of 72). Over 20 years, that compounds to a 5.60× multiplier.
In year 1, $10,000 earns $900 in interest. By year 20, the annual interest has grown to $4,627 — because each year's interest is calculated on a larger balance.
Year-by-year projection
| Year | Balance | Interest this year | Total interest | Growth |
|---|---|---|---|---|
| Year 1 | $10,900 | +$900 | $900 | 1.09× |
| Year 2 | $11,881 | +$981 | $1,881 | 1.19× |
| Year 3 | $12,950 | +$1,069 | $2,950 | 1.30× |
| Year 4 | $14,116 | +$1,166 | $4,116 | 1.41× |
| Year 5 | $15,386 | +$1,270 | $5,386 | 1.54× |
| Year 6 | $16,771 | +$1,385 | $6,771 | 1.68× |
| Year 7 | $18,280 | +$1,509 | $8,280 | 1.83× |
| Year 8 | $19,926 | +$1,645 | $9,926 | 1.99× |
| Year 9 | $21,719 | +$1,793 | $11,719 | 2.17× |
| Year 10 | $23,674 | +$1,955 | $13,674 | 2.37× |
| Year 11 | $25,804 | +$2,131 | $15,804 | 2.58× |
| Year 12 | $28,127 | +$2,322 | $18,127 | 2.81× |
| Year 13 | $30,658 | +$2,531 | $20,658 | 3.07× |
| Year 14 | $33,417 | +$2,759 | $23,417 | 3.34× |
| Year 15 | $36,425 | +$3,008 | $26,425 | 3.64× |
| Year 16 | $39,703 | +$3,278 | $29,703 | 3.97× |
| Year 17 | $43,276 | +$3,573 | $33,276 | 4.33× |
| Year 18 | $47,171 | +$3,895 | $37,171 | 4.72× |
| Year 19 | $51,417 | +$4,245 | $41,417 | 5.14× |
| Year 20 | $56,044 | +$4,627 | $46,044 | 5.60× |
Growth chart
Balance growth over 20 years
Principal
Interest earned
Frequently asked questions
Explore other scenarios
$10,000 for 20 years — other rates
$10,000 at 9% — other time horizons
Related calculators
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 20 years
$56,044
Amount invested$10,000
Interest earned$46,044
Interest multiplier5.60×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $10,900 | +$900 |
| Yr 2 | $11,881 | +$981 |
| Yr 3 | $12,950 | +$1,069 |
| Yr 4 | $14,116 | +$1,166 |
| Yr 5 | $15,386 | +$1,270 |
| Yr 6 | $16,771 | +$1,385 |
| Yr 7 | $18,280 | +$1,509 |
| Yr 8 | $19,926 | +$1,645 |
| Yr 9 | $21,719 | +$1,793 |
| Yr 10 | $23,674 | +$1,955 |
| Yr 11 | $25,804 | +$2,131 |
| Yr 12 | $28,127 | +$2,322 |
| Yr 13 | $30,658 | +$2,531 |
| Yr 14 | $33,417 | +$2,759 |
| Yr 15 | $36,425 | +$3,008 |
| Yr 16 | $39,703 | +$3,278 |
| Yr 17 | $43,276 | +$3,573 |
| Yr 18 | $47,171 | +$3,895 |
| Yr 19 | $51,417 | +$4,245 |
| Yr 20 | $56,044 | +$4,627 |