📈 Compound Interest
$1,000 at 7% for 30 Years
Investing $1,000 at 7% annual compound interest for 30 years grows to $7,612. That's $6,612 earned in interest on top of your original $1,000.
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 30 years
$7,612
Amount invested$1,000
Interest earned$6,612
Interest multiplier7.61×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $1,070 | +$70 |
| Yr 2 | $1,145 | +$75 |
| Yr 3 | $1,225 | +$80 |
| Yr 4 | $1,311 | +$86 |
| Yr 5 | $1,403 | +$92 |
| Yr 6 | $1,501 | +$98 |
| Yr 7 | $1,606 | +$105 |
| Yr 8 | $1,718 | +$112 |
| Yr 9 | $1,838 | +$120 |
| Yr 10 | $1,967 | +$129 |
| Yr 11 | $2,105 | +$138 |
| Yr 12 | $2,252 | +$147 |
| Yr 13 | $2,410 | +$158 |
| Yr 14 | $2,579 | +$169 |
| Yr 15 | $2,759 | +$180 |
| Yr 16 | $2,952 | +$193 |
| Yr 17 | $3,159 | +$207 |
| Yr 18 | $3,380 | +$221 |
| Yr 19 | $3,617 | +$237 |
| Yr 20 | $3,870 | +$253 |
| Yr 21 | $4,141 | +$271 |
| Yr 22 | $4,430 | +$290 |
| Yr 23 | $4,741 | +$310 |
| Yr 24 | $5,072 | +$332 |
| Yr 25 | $5,427 | +$355 |
| Yr 26 | $5,807 | +$380 |
| Yr 27 | $6,214 | +$407 |
| Yr 28 | $6,649 | +$435 |
| Yr 29 | $7,114 | +$465 |
| Yr 30 | $7,612 | +$498 |
Final balance after 30 years
$7,612
Invested
$1,000
Interest earned
$6,612
Multiplier
7.61×
How $1,000 grows at 7%
Compound interest earns returns on your returns — not just your original investment. At 7% per year, your money doubles every 10.3 years (the Rule of 72). Over 30 years, that compounds to a 7.61× multiplier.
In year 1, $1,000 earns $70 in interest. By year 30, the annual interest has grown to $498 — 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 | $1,070 | +$70 | $70 | 1.07× |
| Year 2 | $1,145 | +$75 | $145 | 1.14× |
| Year 3 | $1,225 | +$80 | $225 | 1.23× |
| Year 4 | $1,311 | +$86 | $311 | 1.31× |
| Year 5 | $1,403 | +$92 | $403 | 1.40× |
| Year 6 | $1,501 | +$98 | $501 | 1.50× |
| Year 7 | $1,606 | +$105 | $606 | 1.61× |
| Year 8 | $1,718 | +$112 | $718 | 1.72× |
| Year 9 | $1,838 | +$120 | $838 | 1.84× |
| Year 10 | $1,967 | +$129 | $967 | 1.97× |
| Year 11 | $2,105 | +$138 | $1,105 | 2.10× |
| Year 12 | $2,252 | +$147 | $1,252 | 2.25× |
| Year 13 | $2,410 | +$158 | $1,410 | 2.41× |
| Year 14 | $2,579 | +$169 | $1,579 | 2.58× |
| Year 15 | $2,759 | +$180 | $1,759 | 2.76× |
| Year 16 | $2,952 | +$193 | $1,952 | 2.95× |
| Year 17 | $3,159 | +$207 | $2,159 | 3.16× |
| Year 18 | $3,380 | +$221 | $2,380 | 3.38× |
| Year 19 | $3,617 | +$237 | $2,617 | 3.62× |
| Year 20 | $3,870 | +$253 | $2,870 | 3.87× |
| Year 21 | $4,141 | +$271 | $3,141 | 4.14× |
| Year 22 | $4,430 | +$290 | $3,430 | 4.43× |
| Year 23 | $4,741 | +$310 | $3,741 | 4.74× |
| Year 24 | $5,072 | +$332 | $4,072 | 5.07× |
| Year 25 | $5,427 | +$355 | $4,427 | 5.43× |
| Year 26 | $5,807 | +$380 | $4,807 | 5.81× |
| Year 27 | $6,214 | +$407 | $5,214 | 6.21× |
| Year 28 | $6,649 | +$435 | $5,649 | 6.65× |
| Year 29 | $7,114 | +$465 | $6,114 | 7.11× |
| Year 30 | $7,612 | +$498 | $6,612 | 7.61× |
Growth chart
Balance growth over 30 years
Principal
Interest earned
Frequently asked questions
Explore other scenarios
$1,000 for 30 years — other rates
$1,000 at 7% — other time horizons
Related calculators
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 30 years
$7,612
Amount invested$1,000
Interest earned$6,612
Interest multiplier7.61×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $1,070 | +$70 |
| Yr 2 | $1,145 | +$75 |
| Yr 3 | $1,225 | +$80 |
| Yr 4 | $1,311 | +$86 |
| Yr 5 | $1,403 | +$92 |
| Yr 6 | $1,501 | +$98 |
| Yr 7 | $1,606 | +$105 |
| Yr 8 | $1,718 | +$112 |
| Yr 9 | $1,838 | +$120 |
| Yr 10 | $1,967 | +$129 |
| Yr 11 | $2,105 | +$138 |
| Yr 12 | $2,252 | +$147 |
| Yr 13 | $2,410 | +$158 |
| Yr 14 | $2,579 | +$169 |
| Yr 15 | $2,759 | +$180 |
| Yr 16 | $2,952 | +$193 |
| Yr 17 | $3,159 | +$207 |
| Yr 18 | $3,380 | +$221 |
| Yr 19 | $3,617 | +$237 |
| Yr 20 | $3,870 | +$253 |
| Yr 21 | $4,141 | +$271 |
| Yr 22 | $4,430 | +$290 |
| Yr 23 | $4,741 | +$310 |
| Yr 24 | $5,072 | +$332 |
| Yr 25 | $5,427 | +$355 |
| Yr 26 | $5,807 | +$380 |
| Yr 27 | $6,214 | +$407 |
| Yr 28 | $6,649 | +$435 |
| Yr 29 | $7,114 | +$465 |
| Yr 30 | $7,612 | +$498 |