Compound Interest Calculator
See how your account grows over time.
Inputs
Annual return
%
Expected average yearly return. The long-term S&P 500 has been ~8–10%.Time horizon
How long the money stays invested.
Result
Final balance$63,828.84
Total contributed$25,000.00
Interest earned$38,828.84
Growth over time
| Year | Contributed | Balance | Interest |
|---|---|---|---|
| 1 | $2,200.00 | $2,327.99 | +$127.99 |
| 2 | $3,400.00 | $3,766.21 | +$366.21 |
| 3 | $4,600.00 | $5,323.79 | +$723.79 |
| 4 | $5,800.00 | $7,010.66 | +$1,210.66 |
| 5 | $7,000.00 | $8,837.53 | +$1,837.53 |
| 6 | $8,200.00 | $10,816.03 | +$2,616.03 |
| 7 | $9,400.00 | $12,958.75 | +$3,558.75 |
| 8 | $10,600.00 | $15,279.32 | +$4,679.32 |
| 9 | $11,800.00 | $17,792.48 | +$5,992.48 |
| 10 | $13,000.00 | $20,514.24 | +$7,514.24 |
| 11 | $14,200.00 | $23,461.91 | +$9,261.91 |
| 12 | $15,400.00 | $26,654.23 | +$11,254.23 |
| 13 | $16,600.00 | $30,111.51 | +$13,511.51 |
| 14 | $17,800.00 | $33,855.74 | +$16,055.74 |
| 15 | $19,000.00 | $37,910.74 | +$18,910.74 |
| 16 | $20,200.00 | $42,302.31 | +$22,102.31 |
| 17 | $21,400.00 | $47,058.37 | +$25,658.37 |
| 18 | $22,600.00 | $52,209.19 | +$29,609.19 |
| 19 | $23,800.00 | $57,787.52 | +$33,987.52 |
| 20 | $25,000.00 | $63,828.84 | +$38,828.84 |
Educational tool. Always confirm calculations independently before risking real capital. Prices shown reflect the latest update from our market feeds and may lag the live market. Model long-term account growth from an initial deposit, optional monthly contributions and a fixed annual return compounded monthly.