Compound interest calculator
Enter a starting sum, a regular contribution, an annual rate and a number of years. The calculator shows the final balance and how much of it is contributions and how much is growth.
Result, hypothetical illustration
The figures below are arithmetic output from the rate you entered. They are not a projection, forecast, or representation of any return the Institute or any student has achieved or will achieve.
- Future value
- $694,709
- Total interest
- $504,709
- Multiplier
- 3.7×
- Time-weighted return
- 265.64%
Composition
Where the balance comes from.
Contributions total $190,000 across 30 years. The remainder is produced by compounding.
Illustrative only. Rates are assumptions, not forecasts. Nothing here is financial advice.
Contributions
Interest
Balance
Growth over time
The balance, year by year.
Each column is the balance at the end of a year. The gold portion is the money paid in; the blue portion is the growth produced by compounding at the rate entered.
Year
Table
The figures in full.
Year-end contributions, interest and balance for every year of the period entered. Figures are rounded to the nearest dollar.
Illustrative only. Rates are assumptions, not forecasts. Nothing here is financial advice.
| Year | Contributions | Interest | Balance |
|---|---|---|---|
| 1 | $16,000 | $955 | $16,955 |
| 2 | $22,000 | $2,413 | $24,413 |
| 3 | $28,000 | $4,411 | $32,411 |
| 4 | $34,000 | $6,986 | $40,986 |
| 5 | $40,000 | $10,182 | $50,182 |
| 6 | $46,000 | $14,042 | $60,042 |
| 7 | $52,000 | $18,614 | $70,614 |
| 8 | $58,000 | $23,952 | $81,952 |
| 9 | $64,000 | $30,108 | $94,108 |
| 10 | $70,000 | $37,144 | $107,144 |
| 11 | $76,000 | $45,122 | $121,122 |
| 12 | $82,000 | $54,110 | $136,110 |
| 13 | $88,000 | $64,182 | $152,182 |
| 14 | $94,000 | $75,416 | $169,416 |
| 15 | $100,000 | $87,895 | $187,895 |
| 16 | $106,000 | $101,710 | $207,710 |
| 17 | $112,000 | $116,958 | $228,958 |
| 18 | $118,000 | $133,742 | $251,742 |
| 19 | $124,000 | $152,173 | $276,173 |
| 20 | $130,000 | $172,370 | $302,370 |
| 21 | $136,000 | $194,461 | $330,461 |
| 22 | $142,000 | $218,582 | $360,582 |
| 23 | $148,000 | $244,881 | $392,881 |
| 24 | $154,000 | $273,515 | $427,515 |
| 25 | $160,000 | $304,653 | $464,653 |
| 26 | $166,000 | $338,475 | $504,475 |
| 27 | $172,000 | $375,176 | $547,176 |
| 28 | $178,000 | $414,964 | $592,964 |
| 29 | $184,000 | $458,062 | $642,062 |
| 30 | $190,000 | $504,709 | $694,709 |