📈 Compound Interest
$5,000 at 4% for 20 Years
Investing $5,000 at 4% annual compound interest for 20 years grows to $10,956. That's $5,956 earned in interest on top of your original $5,000.
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 20 years
$10,956
Amount invested$5,000
Interest earned$5,956
Interest multiplier2.19×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $5,200 | +$200 |
| Yr 2 | $5,408 | +$208 |
| Yr 3 | $5,624 | +$216 |
| Yr 4 | $5,849 | +$225 |
| Yr 5 | $6,083 | +$234 |
| Yr 6 | $6,327 | +$243 |
| Yr 7 | $6,580 | +$253 |
| Yr 8 | $6,843 | +$263 |
| Yr 9 | $7,117 | +$274 |
| Yr 10 | $7,401 | +$285 |
| Yr 11 | $7,697 | +$296 |
| Yr 12 | $8,005 | +$308 |
| Yr 13 | $8,325 | +$320 |
| Yr 14 | $8,658 | +$333 |
| Yr 15 | $9,005 | +$346 |
| Yr 16 | $9,365 | +$360 |
| Yr 17 | $9,740 | +$375 |
| Yr 18 | $10,129 | +$390 |
| Yr 19 | $10,534 | +$405 |
| Yr 20 | $10,956 | +$421 |
Final balance after 20 years
$10,956
Invested
$5,000
Interest earned
$5,956
Multiplier
2.19×
How $5,000 grows at 4%
Compound interest earns returns on your returns — not just your original investment. At 4% per year, your money doubles every 18 years (the Rule of 72). Over 20 years, that compounds to a 2.19× multiplier.
In year 1, $5,000 earns $200 in interest. By year 20, the annual interest has grown to $421 — 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 | $5,200 | +$200 | $200 | 1.04× |
| Year 2 | $5,408 | +$208 | $408 | 1.08× |
| Year 3 | $5,624 | +$216 | $624 | 1.12× |
| Year 4 | $5,849 | +$225 | $849 | 1.17× |
| Year 5 | $6,083 | +$234 | $1,083 | 1.22× |
| Year 6 | $6,327 | +$243 | $1,327 | 1.27× |
| Year 7 | $6,580 | +$253 | $1,580 | 1.32× |
| Year 8 | $6,843 | +$263 | $1,843 | 1.37× |
| Year 9 | $7,117 | +$274 | $2,117 | 1.42× |
| Year 10 | $7,401 | +$285 | $2,401 | 1.48× |
| Year 11 | $7,697 | +$296 | $2,697 | 1.54× |
| Year 12 | $8,005 | +$308 | $3,005 | 1.60× |
| Year 13 | $8,325 | +$320 | $3,325 | 1.67× |
| Year 14 | $8,658 | +$333 | $3,658 | 1.73× |
| Year 15 | $9,005 | +$346 | $4,005 | 1.80× |
| Year 16 | $9,365 | +$360 | $4,365 | 1.87× |
| Year 17 | $9,740 | +$375 | $4,740 | 1.95× |
| Year 18 | $10,129 | +$390 | $5,129 | 2.03× |
| Year 19 | $10,534 | +$405 | $5,534 | 2.11× |
| Year 20 | $10,956 | +$421 | $5,956 | 2.19× |
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 4% — other time horizons
Related calculators
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 20 years
$10,956
Amount invested$5,000
Interest earned$5,956
Interest multiplier2.19×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $5,200 | +$200 |
| Yr 2 | $5,408 | +$208 |
| Yr 3 | $5,624 | +$216 |
| Yr 4 | $5,849 | +$225 |
| Yr 5 | $6,083 | +$234 |
| Yr 6 | $6,327 | +$243 |
| Yr 7 | $6,580 | +$253 |
| Yr 8 | $6,843 | +$263 |
| Yr 9 | $7,117 | +$274 |
| Yr 10 | $7,401 | +$285 |
| Yr 11 | $7,697 | +$296 |
| Yr 12 | $8,005 | +$308 |
| Yr 13 | $8,325 | +$320 |
| Yr 14 | $8,658 | +$333 |
| Yr 15 | $9,005 | +$346 |
| Yr 16 | $9,365 | +$360 |
| Yr 17 | $9,740 | +$375 |
| Yr 18 | $10,129 | +$390 |
| Yr 19 | $10,534 | +$405 |
| Yr 20 | $10,956 | +$421 |