Compound Interest Calculator
Estimate how a starting balance, monthly contributions, and reinvested growth can compound over time.
Projection inputs
Ending balance
$691,150
Contributions
$190,000
Estimated growth
$501,150
Year-by-year projection
| Year | Contributions | Projected balance |
|---|---|---|
| 1 | $16,000 | $16,919 |
| 2 | $22,000 | $24,339 |
| 3 | $28,000 | $32,294 |
| 4 | $34,000 | $40,825 |
| 5 | $40,000 | $49,973 |
| 6 | $46,000 | $59,782 |
| 7 | $52,000 | $70,299 |
| 8 | $58,000 | $81,578 |
| 9 | $64,000 | $93,671 |
| 10 | $70,000 | $106,639 |
| 11 | $76,000 | $120,544 |
| 12 | $82,000 | $135,455 |
| 13 | $88,000 | $151,443 |
| 14 | $94,000 | $168,587 |
| 15 | $100,000 | $186,971 |
| 16 | $106,000 | $206,683 |
| 17 | $112,000 | $227,820 |
| 18 | $118,000 | $250,486 |
| 19 | $124,000 | $274,790 |
| 20 | $130,000 | $300,851 |
| 21 | $136,000 | $328,796 |
| 22 | $142,000 | $358,760 |
| 23 | $148,000 | $390,892 |
| 24 | $154,000 | $425,345 |
| 25 | $160,000 | $462,290 |
| 26 | $166,000 | $501,905 |
| 27 | $172,000 | $544,384 |
| 28 | $178,000 | $589,934 |
| 29 | $184,000 | $638,777 |
| 30 | $190,000 | $691,150 |
Compound interest questions
What is compound interest?
Compound interest is growth on both your original money and the earnings that have already been added to it.
Does this calculator include taxes or fees?
No. It estimates growth before taxes, fees, inflation, and market volatility.
What annual return should I use?
Use a conservative long-term assumption that fits the asset mix you are modeling. The default 7% is only an example.