Compound Interest Calculator
Calculate how your savings or investments may grow over time with compound interest, monthly contributions, and different compounding frequencies.
Investment Details
$
$
%
years
Future Value
$145,180.47
Total Contributions
$58,000.00
Total Interest Earned
$87,180.47
If you invest $10,000.00 and contribute $200.00 monthly for 20 years at an annual return of 7%, your estimated future value would be $145,180.47.
Growth Over Time
Year-by-Year Breakdown
| Year | Contributions | Interest | Balance |
|---|---|---|---|
| 1 | $12,400.00 | $815.88 | $13,215.88 |
| 2 | $14,800.00 | $1,864.23 | $16,664.23 |
| 3 | $17,200.00 | $3,161.86 | $20,361.86 |
| 4 | $19,600.00 | $4,726.80 | $24,326.80 |
| 5 | $22,000.00 | $6,578.36 | $28,578.36 |
| 6 | $24,400.00 | $8,737.26 | $33,137.26 |
| 7 | $26,800.00 | $11,225.74 | $38,025.74 |
| 8 | $29,200.00 | $14,067.59 | $43,267.59 |
| 9 | $31,600.00 | $17,288.39 | $48,888.39 |
| 10 | $34,000.00 | $20,915.51 | $54,915.51 |
| 11 | $36,400.00 | $24,978.33 | $61,378.33 |
| 12 | $38,800.00 | $29,508.35 | $68,308.35 |
| 13 | $41,200.00 | $34,539.34 | $75,739.34 |
| 14 | $43,600.00 | $40,107.52 | $83,707.52 |
| 15 | $46,000.00 | $46,251.72 | $92,251.72 |
| 16 | $48,400.00 | $53,013.58 | $101,413.58 |
| 17 | $50,800.00 | $60,437.75 | $111,237.75 |
| 18 | $53,200.00 | $68,572.11 | $121,772.11 |
| 19 | $55,600.00 | $77,468.00 | $133,068.00 |
| 20 | $58,000.00 | $87,180.47 | $145,180.47 |
How Compound Interest Is Calculated
A = P(1 + r/n)nt + PMT × [((1 + r/n)nt − 1) / (r/n)]
A— Future value
P— Principal (initial investment)
r— Annual interest rate (decimal)
n— Compounding frequency per year
t— Number of years
PMT— Monthly contribution
This calculator assumes contributions are made at the end of each period. Results are estimates and do not account for taxes, fees, or inflation.