📈 Compound Interest
$5,000 at 10% for 20 Years
Investing $5,000 at 10% annual compound interest for 20 years grows to $33,637. That's $28,637 earned in interest on top of your original $5,000.
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 20 years
$33,637
Amount invested$5,000
Interest earned$28,637
Interest multiplier6.73×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $5,500 | +$500 |
| Yr 2 | $6,050 | +$550 |
| Yr 3 | $6,655 | +$605 |
| Yr 4 | $7,321 | +$666 |
| Yr 5 | $8,053 | +$732 |
| Yr 6 | $8,858 | +$805 |
| Yr 7 | $9,744 | +$886 |
| Yr 8 | $10,718 | +$974 |
| Yr 9 | $11,790 | +$1,072 |
| Yr 10 | $12,969 | +$1,179 |
| Yr 11 | $14,266 | +$1,297 |
| Yr 12 | $15,692 | +$1,427 |
| Yr 13 | $17,261 | +$1,569 |
| Yr 14 | $18,987 | +$1,726 |
| Yr 15 | $20,886 | +$1,899 |
| Yr 16 | $22,975 | +$2,089 |
| Yr 17 | $25,272 | +$2,297 |
| Yr 18 | $27,800 | +$2,527 |
| Yr 19 | $30,580 | +$2,780 |
| Yr 20 | $33,637 | +$3,058 |
Final balance after 20 years
$33,637
Invested
$5,000
Interest earned
$28,637
Multiplier
6.73×
How $5,000 grows at 10%
Compound interest earns returns on your returns — not just your original investment. At 10% per year, your money doubles every 7.2 years (the Rule of 72). Over 20 years, that compounds to a 6.73× multiplier.
In year 1, $5,000 earns $500 in interest. By year 20, the annual interest has grown to $3,058 — 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 | $5,500 | +$500 | $500 | 1.10× |
| Year 2 | $6,050 | +$550 | $1,050 | 1.21× |
| Year 3 | $6,655 | +$605 | $1,655 | 1.33× |
| Year 4 | $7,321 | +$666 | $2,321 | 1.46× |
| Year 5 | $8,053 | +$732 | $3,053 | 1.61× |
| Year 6 | $8,858 | +$805 | $3,858 | 1.77× |
| Year 7 | $9,744 | +$886 | $4,744 | 1.95× |
| Year 8 | $10,718 | +$974 | $5,718 | 2.14× |
| Year 9 | $11,790 | +$1,072 | $6,790 | 2.36× |
| Year 10 | $12,969 | +$1,179 | $7,969 | 2.59× |
| Year 11 | $14,266 | +$1,297 | $9,266 | 2.85× |
| Year 12 | $15,692 | +$1,427 | $10,692 | 3.14× |
| Year 13 | $17,261 | +$1,569 | $12,261 | 3.45× |
| Year 14 | $18,987 | +$1,726 | $13,987 | 3.80× |
| Year 15 | $20,886 | +$1,899 | $15,886 | 4.18× |
| Year 16 | $22,975 | +$2,089 | $17,975 | 4.59× |
| Year 17 | $25,272 | +$2,297 | $20,272 | 5.05× |
| Year 18 | $27,800 | +$2,527 | $22,800 | 5.56× |
| Year 19 | $30,580 | +$2,780 | $25,580 | 6.12× |
| Year 20 | $33,637 | +$3,058 | $28,637 | 6.73× |
Growth chart
Balance growth over 20 years
Principal
Interest earned
Frequently asked questions
Explore other scenarios
$5,000 for 20 years — other rates
$5,000 at 10% — other time horizons
Related calculators
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 20 years
$33,637
Amount invested$5,000
Interest earned$28,637
Interest multiplier6.73×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $5,500 | +$500 |
| Yr 2 | $6,050 | +$550 |
| Yr 3 | $6,655 | +$605 |
| Yr 4 | $7,321 | +$666 |
| Yr 5 | $8,053 | +$732 |
| Yr 6 | $8,858 | +$805 |
| Yr 7 | $9,744 | +$886 |
| Yr 8 | $10,718 | +$974 |
| Yr 9 | $11,790 | +$1,072 |
| Yr 10 | $12,969 | +$1,179 |
| Yr 11 | $14,266 | +$1,297 |
| Yr 12 | $15,692 | +$1,427 |
| Yr 13 | $17,261 | +$1,569 |
| Yr 14 | $18,987 | +$1,726 |
| Yr 15 | $20,886 | +$1,899 |
| Yr 16 | $22,975 | +$2,089 |
| Yr 17 | $25,272 | +$2,297 |
| Yr 18 | $27,800 | +$2,527 |
| Yr 19 | $30,580 | +$2,780 |
| Yr 20 | $33,637 | +$3,058 |