📈 Compound Interest
$10,000 at 5% for 20 Years
Investing $10,000 at 5% annual compound interest for 20 years grows to $26,533. That's $16,533 earned in interest on top of your original $10,000.
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 20 years
$26,533
Amount invested$10,000
Interest earned$16,533
Interest multiplier2.65×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $10,500 | +$500 |
| Yr 2 | $11,025 | +$525 |
| Yr 3 | $11,576 | +$551 |
| Yr 4 | $12,155 | +$579 |
| Yr 5 | $12,763 | +$608 |
| Yr 6 | $13,401 | +$638 |
| Yr 7 | $14,071 | +$670 |
| Yr 8 | $14,775 | +$704 |
| Yr 9 | $15,513 | +$739 |
| Yr 10 | $16,289 | +$776 |
| Yr 11 | $17,103 | +$814 |
| Yr 12 | $17,959 | +$855 |
| Yr 13 | $18,856 | +$898 |
| Yr 14 | $19,799 | +$943 |
| Yr 15 | $20,789 | +$990 |
| Yr 16 | $21,829 | +$1,039 |
| Yr 17 | $22,920 | +$1,091 |
| Yr 18 | $24,066 | +$1,146 |
| Yr 19 | $25,270 | +$1,203 |
| Yr 20 | $26,533 | +$1,263 |
Final balance after 20 years
$26,533
Invested
$10,000
Interest earned
$16,533
Multiplier
2.65×
How $10,000 grows at 5%
Compound interest earns returns on your returns — not just your original investment. At 5% per year, your money doubles every 14.4 years (the Rule of 72). Over 20 years, that compounds to a 2.65× multiplier.
In year 1, $10,000 earns $500 in interest. By year 20, the annual interest has grown to $1,263 — 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 | $10,500 | +$500 | $500 | 1.05× |
| Year 2 | $11,025 | +$525 | $1,025 | 1.10× |
| Year 3 | $11,576 | +$551 | $1,576 | 1.16× |
| Year 4 | $12,155 | +$579 | $2,155 | 1.22× |
| Year 5 | $12,763 | +$608 | $2,763 | 1.28× |
| Year 6 | $13,401 | +$638 | $3,401 | 1.34× |
| Year 7 | $14,071 | +$670 | $4,071 | 1.41× |
| Year 8 | $14,775 | +$704 | $4,775 | 1.48× |
| Year 9 | $15,513 | +$739 | $5,513 | 1.55× |
| Year 10 | $16,289 | +$776 | $6,289 | 1.63× |
| Year 11 | $17,103 | +$814 | $7,103 | 1.71× |
| Year 12 | $17,959 | +$855 | $7,959 | 1.80× |
| Year 13 | $18,856 | +$898 | $8,856 | 1.89× |
| Year 14 | $19,799 | +$943 | $9,799 | 1.98× |
| Year 15 | $20,789 | +$990 | $10,789 | 2.08× |
| Year 16 | $21,829 | +$1,039 | $11,829 | 2.18× |
| Year 17 | $22,920 | +$1,091 | $12,920 | 2.29× |
| Year 18 | $24,066 | +$1,146 | $14,066 | 2.41× |
| Year 19 | $25,270 | +$1,203 | $15,270 | 2.53× |
| Year 20 | $26,533 | +$1,263 | $16,533 | 2.65× |
Growth chart
Balance growth over 20 years
Principal
Interest earned
Frequently asked questions
Explore other scenarios
$10,000 for 20 years — other rates
$10,000 at 5% — other time horizons
Related calculators
Compound Interest Calculator
Australia 2026
$
%
$
Total value after 20 years
$26,533
Amount invested$10,000
Interest earned$16,533
Interest multiplier2.65×
Year-by-year growth
| Year | Balance | Interest |
|---|---|---|
| Yr 1 | $10,500 | +$500 |
| Yr 2 | $11,025 | +$525 |
| Yr 3 | $11,576 | +$551 |
| Yr 4 | $12,155 | +$579 |
| Yr 5 | $12,763 | +$608 |
| Yr 6 | $13,401 | +$638 |
| Yr 7 | $14,071 | +$670 |
| Yr 8 | $14,775 | +$704 |
| Yr 9 | $15,513 | +$739 |
| Yr 10 | $16,289 | +$776 |
| Yr 11 | $17,103 | +$814 |
| Yr 12 | $17,959 | +$855 |
| Yr 13 | $18,856 | +$898 |
| Yr 14 | $19,799 | +$943 |
| Yr 15 | $20,789 | +$990 |
| Yr 16 | $21,829 | +$1,039 |
| Yr 17 | $22,920 | +$1,091 |
| Yr 18 | $24,066 | +$1,146 |
| Yr 19 | $25,270 | +$1,203 |
| Yr 20 | $26,533 | +$1,263 |