Compound Interest Calculator
Project investment growth with compound interest over time. Compare contributions and returns with charts and a year-by-year breakdown.
Assumptions
Contributions are mapped to each compounding period (e.g. quarterly compounding uses three months of contributions per period). This matches the standard end-of-period annuity form with your stated formula.
Future Value
$107,730
Projected balance
Total Invested
$55,000
Principal you put in
Total Interest Earned
$52,730
Growth from compounding
Effective Annual Rate
7.23%
Compounding: Monthly
Investment growth over time
Stacked areas: cumulative invested principal (#10b981) and investment gains (#6366f1).
Annual deposits vs interest
Year-by-year breakdown
| Year | Deposits | Interest | Total Value |
|---|---|---|---|
| 1 | $3,000 | $821 | $13,821 |
| 2 | $3,000 | $1,097 | $17,918 |
| 3 | $3,000 | $1,393 | $22,312 |
| 4 | $3,000 | $1,711 | $27,023 |
| 5 | $3,000 | $2,052 | $32,074 |
| 6 | $3,000 | $2,417 | $37,491 |
| 7 | $3,000 | $2,808 | $43,300 |
| 8 | $3,000 | $3,228 | $49,528 |
| 9 | $3,000 | $3,679 | $56,206 |
| 10 | $3,000 | $4,161 | $63,368 |
| 11 | $3,000 | $4,679 | $71,047 |
| 12 | $3,000 | $5,234 | $79,281 |
| 13 | $3,000 | $5,829 | $88,110 |
| 14 | $3,000 | $6,468 | $97,578 |
| 15 | $3,000 | $7,152 | $107,730 |