Compound Interest Calculator
See how contributions and compounding turn into long-term wealth.
Investment Parameters
$
$
Final Balance
$854,537
Total Contributions
$190,000
Total Interest Earned
$664,537
Year-by-Year Breakdown
| Year | Starting Balance | Contributions | Interest Earned | Ending Balance |
|---|---|---|---|---|
| 1 | $10,000 | $6,000 | $1,055 | $17,055 |
| 2 | $17,055 | $6,000 | $1,641 | $24,695 |
| 3 | $24,695 | $6,000 | $2,275 | $32,970 |
| 4 | $32,970 | $6,000 | $2,961 | $41,932 |
| 5 | $41,932 | $6,000 | $3,705 | $51,637 |
| 6 | $51,637 | $6,000 | $4,511 | $62,148 |
| 7 | $62,148 | $6,000 | $5,383 | $73,531 |
| 8 | $73,531 | $6,000 | $6,328 | $85,859 |
| 9 | $85,859 | $6,000 | $7,351 | $99,210 |
| 10 | $99,210 | $6,000 | $8,459 | $113,669 |
| 11 | $113,669 | $6,000 | $9,659 | $129,329 |
| 12 | $129,329 | $6,000 | $10,959 | $146,288 |
| 13 | $146,288 | $6,000 | $12,367 | $164,655 |
| 14 | $164,655 | $6,000 | $13,891 | $184,546 |
| 15 | $184,546 | $6,000 | $15,542 | $206,088 |
| 16 | $206,088 | $6,000 | $17,330 | $229,419 |
| 17 | $229,419 | $6,000 | $19,267 | $254,685 |
| 18 | $254,685 | $6,000 | $21,364 | $282,049 |
| 19 | $282,049 | $6,000 | $23,635 | $311,684 |
| 20 | $311,684 | $6,000 | $26,095 | $343,778 |
| 21 | $343,778 | $6,000 | $28,758 | $378,537 |
| 22 | $378,537 | $6,000 | $31,643 | $416,180 |
| 23 | $416,180 | $6,000 | $34,768 | $456,948 |
| 24 | $456,948 | $6,000 | $38,151 | $501,099 |
| 25 | $501,099 | $6,000 | $41,816 | $548,915 |
| 26 | $548,915 | $6,000 | $45,785 | $600,700 |
| 27 | $600,700 | $6,000 | $50,083 | $656,782 |
| 28 | $656,782 | $6,000 | $54,738 | $717,520 |
| 29 | $717,520 | $6,000 | $59,779 | $783,299 |
| 30 | $783,299 | $6,000 | $65,238 | $854,537 |
| Total | — | $190,000 | $664,537 | $854,537 |
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Frequently Asked Questions
- We use monthly compounding by default with end-of-period contributions: FV = P(1+r)^n + PMT × ((1+r)^n − 1)/r, where r is the monthly rate and n is the total number of months.