Finance tool
Compound Interest Calculator
See how an initial investment and recurring deposits can grow. Compare contribution frequency, compounding frequency, interest earned, and annual balances.
Investment assumptions
Model an initial deposit plus recurring contributions.
Projected future value
$300,851
Effective annual rate: 7.23%
Total contributed
$130,000
Interest earned
$170,851
| Year | Contributed | Interest | Balance |
|---|---|---|---|
| 1 | $16,000 | $919 | $16,919 |
| 2 | $22,000 | $2,339 | $24,339 |
| 3 | $28,000 | $4,294 | $32,294 |
| 4 | $34,000 | $6,825 | $40,825 |
| 5 | $40,000 | $9,973 | $49,973 |
| 10 | $70,000 | $36,639 | $106,639 |
| 15 | $100,000 | $86,971 | $186,971 |
| 20 | $130,000 | $170,851 | $300,851 |
A fuller investment growth model
Compound interest earns returns on both the money contributed and earlier returns. This calculator processes growth monthly while preserving the effective yield of the selected compounding schedule, so quarterly and annual compounding can be compared consistently.
Unlike a basic future-value result, the table separates deposits from investment growth. That distinction helps show whether a target is being reached through saving more, earning a higher return, or allowing more time.
What the estimate does not include
Returns are modeled as steady and do not include market volatility, taxes, fees, inflation, or contribution limits. Use several rates—conservative, expected, and optimistic—rather than treating one projection as guaranteed.
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