📈 Compound Interest
$5,000 at 9% for 15 Years
Investing $5,000 at 9% annual compound interest for 15 years grows to $18,212. That's $13,212 earned in interest on top of your original $5,000.
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 15 years
$18,212
Amount invested$5,000
Interest earned$13,212
Interest multiplier3.64×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $5,450 | +$450 |
| Yr 2 | $5,941 | +$491 |
| Yr 3 | $6,475 | +$535 |
| Yr 4 | $7,058 | +$583 |
| Yr 5 | $7,693 | +$635 |
| Yr 6 | $8,386 | +$692 |
| Yr 7 | $9,140 | +$755 |
| Yr 8 | $9,963 | +$823 |
| Yr 9 | $10,859 | +$897 |
| Yr 10 | $11,837 | +$977 |
| Yr 11 | $12,902 | +$1,065 |
| Yr 12 | $14,063 | +$1,161 |
| Yr 13 | $15,329 | +$1,266 |
| Yr 14 | $16,709 | +$1,380 |
| Yr 15 | $18,212 | +$1,504 |
Final balance after 15 years
$18,212
Invested
$5,000
Interest earned
$13,212
Multiplier
3.64×
How $5,000 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 15 years, that compounds to a 3.64× multiplier.
In year 1, $5,000 earns $450 in interest. By year 15, the annual interest has grown to $1,504 — 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 | $5,450 | +$450 | $450 | 1.09× |
| Year 2 | $5,941 | +$491 | $941 | 1.19× |
| Year 3 | $6,475 | +$535 | $1,475 | 1.30× |
| Year 4 | $7,058 | +$583 | $2,058 | 1.41× |
| Year 5 | $7,693 | +$635 | $2,693 | 1.54× |
| Year 6 | $8,386 | +$692 | $3,386 | 1.68× |
| Year 7 | $9,140 | +$755 | $4,140 | 1.83× |
| Year 8 | $9,963 | +$823 | $4,963 | 1.99× |
| Year 9 | $10,859 | +$897 | $5,859 | 2.17× |
| Year 10 | $11,837 | +$977 | $6,837 | 2.37× |
| Year 11 | $12,902 | +$1,065 | $7,902 | 2.58× |
| Year 12 | $14,063 | +$1,161 | $9,063 | 2.81× |
| Year 13 | $15,329 | +$1,266 | $10,329 | 3.07× |
| Year 14 | $16,709 | +$1,380 | $11,709 | 3.34× |
| Year 15 | $18,212 | +$1,504 | $13,212 | 3.64× |
Growth chart
Balance growth over 15 years
Principal
Interest earned
Frequently asked questions
Explore other scenarios
$5,000 for 15 years — other rates
$5,000 at 9% — other time horizons
Related calculators
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 15 years
$18,212
Amount invested$5,000
Interest earned$13,212
Interest multiplier3.64×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $5,450 | +$450 |
| Yr 2 | $5,941 | +$491 |
| Yr 3 | $6,475 | +$535 |
| Yr 4 | $7,058 | +$583 |
| Yr 5 | $7,693 | +$635 |
| Yr 6 | $8,386 | +$692 |
| Yr 7 | $9,140 | +$755 |
| Yr 8 | $9,963 | +$823 |
| Yr 9 | $10,859 | +$897 |
| Yr 10 | $11,837 | +$977 |
| Yr 11 | $12,902 | +$1,065 |
| Yr 12 | $14,063 | +$1,161 |
| Yr 13 | $15,329 | +$1,266 |
| Yr 14 | $16,709 | +$1,380 |
| Yr 15 | $18,212 | +$1,504 |