📈 Compound Interest
$10,000 at 8% for 30 Years
Investing $10,000 at 8% annual compound interest for 30 years grows to $100,627. That's $90,627 earned in interest on top of your original $10,000.
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 30 years
$100,627
Amount invested$10,000
Interest earned$90,627
Interest multiplier10.06×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $10,800 | +$800 |
| Yr 2 | $11,664 | +$864 |
| Yr 3 | $12,597 | +$933 |
| Yr 4 | $13,605 | +$1,008 |
| Yr 5 | $14,693 | +$1,088 |
| Yr 6 | $15,869 | +$1,175 |
| Yr 7 | $17,138 | +$1,269 |
| Yr 8 | $18,509 | +$1,371 |
| Yr 9 | $19,990 | +$1,481 |
| Yr 10 | $21,589 | +$1,599 |
| Yr 11 | $23,316 | +$1,727 |
| Yr 12 | $25,182 | +$1,865 |
| Yr 13 | $27,196 | +$2,015 |
| Yr 14 | $29,372 | +$2,176 |
| Yr 15 | $31,722 | +$2,350 |
| Yr 16 | $34,259 | +$2,538 |
| Yr 17 | $37,000 | +$2,741 |
| Yr 18 | $39,960 | +$2,960 |
| Yr 19 | $43,157 | +$3,197 |
| Yr 20 | $46,610 | +$3,453 |
| Yr 21 | $50,338 | +$3,729 |
| Yr 22 | $54,365 | +$4,027 |
| Yr 23 | $58,715 | +$4,349 |
| Yr 24 | $63,412 | +$4,697 |
| Yr 25 | $68,485 | +$5,073 |
| Yr 26 | $73,964 | +$5,479 |
| Yr 27 | $79,881 | +$5,917 |
| Yr 28 | $86,271 | +$6,390 |
| Yr 29 | $93,173 | +$6,902 |
| Yr 30 | $100,627 | +$7,454 |
Final balance after 30 years
$100,627
Invested
$10,000
Interest earned
$90,627
Multiplier
10.06×
How $10,000 grows at 8%
Compound interest earns returns on your returns — not just your original investment. At 8% per year, your money doubles every 9 years (the Rule of 72). Over 30 years, that compounds to a 10.06× multiplier.
In year 1, $10,000 earns $800 in interest. By year 30, the annual interest has grown to $7,454 — 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 | $10,800 | +$800 | $800 | 1.08× |
| Year 2 | $11,664 | +$864 | $1,664 | 1.17× |
| Year 3 | $12,597 | +$933 | $2,597 | 1.26× |
| Year 4 | $13,605 | +$1,008 | $3,605 | 1.36× |
| Year 5 | $14,693 | +$1,088 | $4,693 | 1.47× |
| Year 6 | $15,869 | +$1,175 | $5,869 | 1.59× |
| Year 7 | $17,138 | +$1,269 | $7,138 | 1.71× |
| Year 8 | $18,509 | +$1,371 | $8,509 | 1.85× |
| Year 9 | $19,990 | +$1,481 | $9,990 | 2.00× |
| Year 10 | $21,589 | +$1,599 | $11,589 | 2.16× |
| Year 11 | $23,316 | +$1,727 | $13,316 | 2.33× |
| Year 12 | $25,182 | +$1,865 | $15,182 | 2.52× |
| Year 13 | $27,196 | +$2,015 | $17,196 | 2.72× |
| Year 14 | $29,372 | +$2,176 | $19,372 | 2.94× |
| Year 15 | $31,722 | +$2,350 | $21,722 | 3.17× |
| Year 16 | $34,259 | +$2,538 | $24,259 | 3.43× |
| Year 17 | $37,000 | +$2,741 | $27,000 | 3.70× |
| Year 18 | $39,960 | +$2,960 | $29,960 | 4.00× |
| Year 19 | $43,157 | +$3,197 | $33,157 | 4.32× |
| Year 20 | $46,610 | +$3,453 | $36,610 | 4.66× |
| Year 21 | $50,338 | +$3,729 | $40,338 | 5.03× |
| Year 22 | $54,365 | +$4,027 | $44,365 | 5.44× |
| Year 23 | $58,715 | +$4,349 | $48,715 | 5.87× |
| Year 24 | $63,412 | +$4,697 | $53,412 | 6.34× |
| Year 25 | $68,485 | +$5,073 | $58,485 | 6.85× |
| Year 26 | $73,964 | +$5,479 | $63,964 | 7.40× |
| Year 27 | $79,881 | +$5,917 | $69,881 | 7.99× |
| Year 28 | $86,271 | +$6,390 | $76,271 | 8.63× |
| Year 29 | $93,173 | +$6,902 | $83,173 | 9.32× |
| Year 30 | $100,627 | +$7,454 | $90,627 | 10.06× |
Growth chart
Balance growth over 30 years
Principal
Interest earned
Frequently asked questions
Explore other scenarios
$10,000 for 30 years — other rates
$10,000 at 8% — other time horizons
Related calculators
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 30 years
$100,627
Amount invested$10,000
Interest earned$90,627
Interest multiplier10.06×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $10,800 | +$800 |
| Yr 2 | $11,664 | +$864 |
| Yr 3 | $12,597 | +$933 |
| Yr 4 | $13,605 | +$1,008 |
| Yr 5 | $14,693 | +$1,088 |
| Yr 6 | $15,869 | +$1,175 |
| Yr 7 | $17,138 | +$1,269 |
| Yr 8 | $18,509 | +$1,371 |
| Yr 9 | $19,990 | +$1,481 |
| Yr 10 | $21,589 | +$1,599 |
| Yr 11 | $23,316 | +$1,727 |
| Yr 12 | $25,182 | +$1,865 |
| Yr 13 | $27,196 | +$2,015 |
| Yr 14 | $29,372 | +$2,176 |
| Yr 15 | $31,722 | +$2,350 |
| Yr 16 | $34,259 | +$2,538 |
| Yr 17 | $37,000 | +$2,741 |
| Yr 18 | $39,960 | +$2,960 |
| Yr 19 | $43,157 | +$3,197 |
| Yr 20 | $46,610 | +$3,453 |
| Yr 21 | $50,338 | +$3,729 |
| Yr 22 | $54,365 | +$4,027 |
| Yr 23 | $58,715 | +$4,349 |
| Yr 24 | $63,412 | +$4,697 |
| Yr 25 | $68,485 | +$5,073 |
| Yr 26 | $73,964 | +$5,479 |
| Yr 27 | $79,881 | +$5,917 |
| Yr 28 | $86,271 | +$6,390 |
| Yr 29 | $93,173 | +$6,902 |
| Yr 30 | $100,627 | +$7,454 |