📈 Compound Interest
$1,000 at 9% for 25 Years
Investing $1,000 at 9% annual compound interest for 25 years grows to $8,623. That's $7,623 earned in interest on top of your original $1,000.
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 25 years
$8,623
Amount invested$1,000
Interest earned$7,623
Interest multiplier8.62×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $1,090 | +$90 |
| Yr 2 | $1,188 | +$98 |
| Yr 3 | $1,295 | +$107 |
| Yr 4 | $1,412 | +$117 |
| Yr 5 | $1,539 | +$127 |
| Yr 6 | $1,677 | +$138 |
| Yr 7 | $1,828 | +$151 |
| Yr 8 | $1,993 | +$165 |
| Yr 9 | $2,172 | +$179 |
| Yr 10 | $2,367 | +$195 |
| Yr 11 | $2,580 | +$213 |
| Yr 12 | $2,813 | +$232 |
| Yr 13 | $3,066 | +$253 |
| Yr 14 | $3,342 | +$276 |
| Yr 15 | $3,642 | +$301 |
| Yr 16 | $3,970 | +$328 |
| Yr 17 | $4,328 | +$357 |
| Yr 18 | $4,717 | +$389 |
| Yr 19 | $5,142 | +$425 |
| Yr 20 | $5,604 | +$463 |
| Yr 21 | $6,109 | +$504 |
| Yr 22 | $6,659 | +$550 |
| Yr 23 | $7,258 | +$599 |
| Yr 24 | $7,911 | +$653 |
| Yr 25 | $8,623 | +$712 |
Final balance after 25 years
$8,623
Invested
$1,000
Interest earned
$7,623
Multiplier
8.62×
How $1,000 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 25 years, that compounds to a 8.62× multiplier.
In year 1, $1,000 earns $90 in interest. By year 25, the annual interest has grown to $712 — 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 | $1,090 | +$90 | $90 | 1.09× |
| Year 2 | $1,188 | +$98 | $188 | 1.19× |
| Year 3 | $1,295 | +$107 | $295 | 1.30× |
| Year 4 | $1,412 | +$117 | $412 | 1.41× |
| Year 5 | $1,539 | +$127 | $539 | 1.54× |
| Year 6 | $1,677 | +$138 | $677 | 1.68× |
| Year 7 | $1,828 | +$151 | $828 | 1.83× |
| Year 8 | $1,993 | +$165 | $993 | 1.99× |
| Year 9 | $2,172 | +$179 | $1,172 | 2.17× |
| Year 10 | $2,367 | +$195 | $1,367 | 2.37× |
| Year 11 | $2,580 | +$213 | $1,580 | 2.58× |
| Year 12 | $2,813 | +$232 | $1,813 | 2.81× |
| Year 13 | $3,066 | +$253 | $2,066 | 3.07× |
| Year 14 | $3,342 | +$276 | $2,342 | 3.34× |
| Year 15 | $3,642 | +$301 | $2,642 | 3.64× |
| Year 16 | $3,970 | +$328 | $2,970 | 3.97× |
| Year 17 | $4,328 | +$357 | $3,328 | 4.33× |
| Year 18 | $4,717 | +$389 | $3,717 | 4.72× |
| Year 19 | $5,142 | +$425 | $4,142 | 5.14× |
| Year 20 | $5,604 | +$463 | $4,604 | 5.60× |
| Year 21 | $6,109 | +$504 | $5,109 | 6.11× |
| Year 22 | $6,659 | +$550 | $5,659 | 6.66× |
| Year 23 | $7,258 | +$599 | $6,258 | 7.26× |
| Year 24 | $7,911 | +$653 | $6,911 | 7.91× |
| Year 25 | $8,623 | +$712 | $7,623 | 8.62× |
Growth chart
Balance growth over 25 years
Principal
Interest earned
Frequently asked questions
Explore other scenarios
$1,000 for 25 years — other rates
$1,000 at 9% — other time horizons
Related calculators
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 25 years
$8,623
Amount invested$1,000
Interest earned$7,623
Interest multiplier8.62×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $1,090 | +$90 |
| Yr 2 | $1,188 | +$98 |
| Yr 3 | $1,295 | +$107 |
| Yr 4 | $1,412 | +$117 |
| Yr 5 | $1,539 | +$127 |
| Yr 6 | $1,677 | +$138 |
| Yr 7 | $1,828 | +$151 |
| Yr 8 | $1,993 | +$165 |
| Yr 9 | $2,172 | +$179 |
| Yr 10 | $2,367 | +$195 |
| Yr 11 | $2,580 | +$213 |
| Yr 12 | $2,813 | +$232 |
| Yr 13 | $3,066 | +$253 |
| Yr 14 | $3,342 | +$276 |
| Yr 15 | $3,642 | +$301 |
| Yr 16 | $3,970 | +$328 |
| Yr 17 | $4,328 | +$357 |
| Yr 18 | $4,717 | +$389 |
| Yr 19 | $5,142 | +$425 |
| Yr 20 | $5,604 | +$463 |
| Yr 21 | $6,109 | +$504 |
| Yr 22 | $6,659 | +$550 |
| Yr 23 | $7,258 | +$599 |
| Yr 24 | $7,911 | +$653 |
| Yr 25 | $8,623 | +$712 |