Finance
Compound Interest
Calculate investment growth with compound interest over time.
Investment Details
Final Balance
$300,851
$130,000
Total Contributions
$170,851
Interest Earned
131%
Return on Investment
Year-by-Year Growth
| Year | With Contributions | Without Contributions |
|---|---|---|
| 0 | $10,000 | $10,000 |
| 1 | $16,919 | $10,723 |
| 2 | $24,339 | $11,498 |
| 3 | $32,294 | $12,329 |
| 4 | $40,825 | $13,221 |
| 5 | $49,973 | $14,176 |
| 6 | $59,782 | $15,201 |
| 7 | $70,299 | $16,300 |
| 8 | $81,578 | $17,478 |
| 9 | $93,671 | $18,742 |
| 10 | $106,639 | $20,097 |
| 11 | $120,544 | $21,549 |
| 12 | $135,455 | $23,107 |
| 13 | $151,443 | $24,778 |
| 14 | $168,587 | $26,569 |
| 15 | $186,971 | $28,489 |
| 16 | $206,683 | $30,549 |
| 17 | $227,820 | $32,757 |
| 18 | $250,486 | $35,125 |
| 19 | $274,790 | $37,665 |
| 20 | $300,851 | $40,387 |
How it works
Compound interest is often called the eighth wonder of the world because of its powerful ability to grow wealth over time. Unlike simple interest, compound interest is calculated on both the initial principal and the accumulated interest from previous periods. This calculator helps you visualize how your money can grow with regular contributions and compound frequency.
The key factors in compound growth are the initial investment, regular contributions, interest rate, compound frequency, and time horizon. Daily compounding slightly outperforms monthly, which slightly outperforms yearly, though the difference diminishes with lower interest rates. The real power of compound interest shows over long time horizons, where small differences in returns create massive differences in final balances.
The line chart shows two trajectories: one with monthly contributions and one without. This visual comparison demonstrates the dramatic impact of consistent investing, even with modest amounts. The year-by-year breakdown table provides detailed numbers for each year, helping you plan specific financial goals.