Mutual Fund Calculator
Project the future value of a lump-sum mutual fund investment with compound growth, and see year-by-year wealth accumulation.
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How to use this calculator
FV = future value, P = principal (lump sum), r = annual return rate, n = investment period in years.
- 1
Enter the lump sum amount you plan to invest.
- 2
Enter the annual return rate you want to test.
- 3
Enter the investment period in years.
- 4
The calculator shows your projected future value, total wealth gained, and a year-by-year snapshot.
Frequently asked questions
What formula does this tool use?
This tool uses FV = P × (1 + r)^n, where P is the lump sum, r is the annual return as a decimal and n is the number of years. Growth is credited once a year, the same rate applies every year, and all gains stay invested.
Does it work with part years?
Yes. The exponent can be fractional, so $20,000 at 8% for 2.5 years gives $24,243.17. The year-by-year line then shows each whole year plus a final entry for the part-year end point.
What does the year-by-year line show?
For periods of six entries or fewer it lists every year. For longer periods it shows years 1 to 5 and the final year, so the default 10-year plan lists Year 1 to Year 5 and then Year 10, with $88,117.08 at the end of year 5.
What happens with a 0% return or a 0-year period?
At 0% the future value equals the lump sum and wealth gained is $0.00. With a period of 0 years the future value is again the lump sum and the year-by-year line reads n/a. An explicit 0 is used as 0; it is not swapped for a default.
Can the return be negative?
Yes. A lump sum of $20,000 at −3% for 4 years falls to $17,705.86, wealth gained is −$2,294.14 and Total Return is −11.47%. A zero lump sum shows n/a for Total Return because a percentage of nothing is undefined.
How should fees be handled?
The tool has no field for an expense ratio, exit load or platform charge. If you want to see the effect of a charge, enter a rate that is already lower by that amount and compare the two runs. Nothing is deducted automatically.
What does Total Return measure?
Total Return is wealth gained divided by the lump sum, times 100, over the whole period. It is not an annual figure. The default plan shows 210.58% over 10 years, which is a different quantity from the 12% yearly rate that produced it.
What is not covered?
There are no monthly contributions (see the SIP calculator for that), no taxes, no distributions paid out, no price volatility and no inflation adjustment. The result is arithmetic on the three inputs only.
Lump-sum mutual fund projection: one amount, one rate, one period
The single formula behind the result
A lump sum is multiplied by (1 + r) once for each year it stays invested. Because there are no later deposits, nothing else enters the calculation: the future value depends on the amount, the yearly rate and the length of time. The tool then subtracts the lump sum to get wealth gained and divides by it to give a total return over the whole period.
Worked example: the built-in 50,000 plan
The figures built into this tool are a $50,000 lump sum, a 12% yearly rate and 10 years. Running them returns a future value of $155,292.41, wealth gained of $105,292.41 and a total return of 210.58%. The year-by-year line shows $56,000.00 after year 1 and $88,117.08 after year 5, which means the second five years add far more than the first five. None of these figures is a forecast or advice; each simply illustrates the inputs.
One amount across five different rates
The table keeps $20,000 and 10 years fixed and varies only the rate, from 0% to 10%. Each row is the tool’s own output for that rate, so you can see how the wealth gained column responds as the rate rises in equal steps.
| Annual rate | Future value | Wealth gained | Total return |
|---|---|---|---|
| 0% | $20,000.00 | $0.00 | 0.00% |
| 4% | $29,604.89 | $9,604.89 | 48.02% |
| 6% | $35,816.95 | $15,816.95 | 79.08% |
| 8% | $43,178.50 | $23,178.50 | 115.89% |
| 10% | $51,874.85 | $31,874.85 | 159.37% |
A longer horizon and a falling value
Time matters as much as rate. Put $25,000 in at 7% and leave it for 15 years and the future value is $68,975.79, a total return of 175.90%. The same arithmetic runs in reverse when the rate is negative: $20,000 at −3% for 4 years ends at $17,705.86, a loss of $2,294.14 or −11.47%. The tool applies the rate mechanically, so it will not warn you that a negative value is unrealistic or likely.
What the tool does not do
Expense ratios, exit loads, taxes, dividends paid out and price swings are not modelled. Contributions after day one are not allowed either, so a monthly investing plan belongs in the SIP calculator. Use this page when you want to compare one fixed amount under several rates or periods, and read each answer as arithmetic on the inputs you typed.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →