Boneyard Tools

SIP Calculator

The SIP calculator estimates what a fixed monthly investment could grow to over time. Enter the amount, an expected annual return and how many years you plan to invest, and it projects the future value alongside the total you contributed and the estimated gains. A year-by-year table shows how compounding builds the balance so you can plan a systematic investment plan with realistic numbers.

How to use the SIP calculator

  1. Pick your currency in the top-right menu (this changes the display, not the math).
  2. Set your monthly investment with the slider or type an amount in the box.
  3. Set the expected annual return as a percentage.
  4. Set the time period in years.
  5. Read the Invested, Est. gains and Future value cards, then check the year-by-year table.

Examples

10,000 per month at 12% for 10 years

monthly 10000, return 12%, years 10
Invested 1,200,000; gains 1,123,391; future value 2,323,391

5,000 per month at 10% for 15 years

monthly 5000, return 10%, years 15
Invested 900,000; gains 1,189,621; future value 2,089,621

500 per month at 8% for 5 years

monthly 500, return 8%, years 5
Invested 30,000; gains 6,983; future value 36,983

Frequently asked questions

How is the SIP future value calculated?

Each monthly contribution is added to the running balance and then grown by one month at the expected monthly rate, which is the annual rate divided by 12. Repeating that for every month of the term and summing the results gives the projected future value.

Does it assume start-of-month or end-of-month contributions?

Start of month. The model treats each installment as invested at the beginning of the month, so it earns growth for that whole month. This is known as an annuity due and matches how most real SIPs debit and invest early in the cycle.

Are these returns guaranteed?

No. The expected return is an assumption you enter, not a promise. Real market returns rise and fall, so the future value is an illustration to help you plan, not a forecast of what any specific fund will deliver.

Does it account for inflation, taxes or fund fees?

No. The figure is a nominal projection before inflation, capital gains tax and the fund's expense ratio. To gauge real purchasing power, mentally discount the result by your expected inflation rate.

What return rate should I use?

Use a realistic long-term assumption for your fund type. Many people model diversified equity SIPs around 10 to 12 percent for illustration, and lower for debt or hybrid funds. When in doubt, run a conservative and an optimistic scenario.

What does the year-by-year table show?

For each year it lists the cumulative amount you have invested and the projected value of the portfolio at that point. The gap between the two columns is your running gain, which widens as compounding takes hold.

Is monthly compounding used?

Yes. The annual return is divided by 12 and applied each month, so returns compound monthly. That matches the monthly rhythm of the contributions.

Does this model a step-up SIP?

No. It assumes the same fixed contribution every month. A step-up SIP raises the amount each year, which grows the final value further, so treat this as the flat-contribution baseline.

Is my data private?

Yes. All calculations run in your browser and nothing you enter is uploaded, so your figures stay on your device.

Learn more

  • What is a SIP?

    A plain-language explainer of systematic investment plans: how they work, why cost averaging and compounding help, and how they compare to lump sums.

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