💰 SIP Calculator: Estimate Your Investment Maturity Value
By Shihab Mia · Updated 2026-07-04
This SIP calculator gives an estimate based on a single constant rate of return. Actual mutual fund returns are not guaranteed, vary year to year with the market, and are affected by fees, taxes and inflation. Treat the result as a projection for planning, not as financial advice or a promised outcome.
A SIP calculator estimates what a fixed monthly investment could grow to over time once returns compound. Enter your monthly amount, an expected annual return and the number of years, and the tool instantly shows your total invested, your estimated returns, and the final maturity value. By default it models 5,000 per month at 12 percent for 10 years, which grows a total investment of 600,000 into roughly 1,161,695, of which about 561,695 is estimated returns.
What is the SIP Calculator?
A SIP, or Systematic Investment Plan, is a way of investing a fixed amount at regular intervals (usually monthly) instead of putting in one lump sum. A SIP calculator turns that habit into a number: it projects how a stream of equal monthly contributions could compound into a maturity value by a chosen date. This is the same idea as dollar-cost averaging, where investing steadily through market ups and downs smooths out your average purchase price and removes the pressure of timing the market.
The engine behind this SIP calculator is the future value of an annuity due. Because each monthly instalment is invested at the start of its month, every contribution earns a slightly different amount of growth depending on how long it stays invested. The earliest contributions compound the longest, so they do the heaviest lifting. The calculator sums the grown value of all of those instalments into one figure, then splits the result into the plain money you contributed and the estimated returns the market added on top.
Reading the three outputs together is what makes a SIP calculator useful. Total invested is simply your monthly amount multiplied by the number of months, the real cash that left your account. Maturity value is what those contributions are projected to be worth. The gap between them is the estimated returns, the compounding payoff. Over long horizons that gap widens dramatically, which is why starting a systematic investment plan early and staying consistent tends to matter far more than the exact monthly amount.
The key caveat is the expected return. A SIP calculator assumes one steady annual rate for the whole period, but real mutual fund returns are lumpy: some years are strongly positive, some are negative. The single-rate SIP return calculator is a planning approximation, not a forecast. A sensible way to use it is to run three scenarios, a conservative rate, a middle rate and an optimistic rate, and treat the range as the realistic band of outcomes rather than trusting any single headline figure.
When to use it
- Estimating how much a monthly mutual fund SIP could grow to over 10, 15 or 20 years toward a long-term goal.
- Working backward from a target corpus to find the monthly SIP investment you would need to reach it.
- Comparing how different expected returns, such as 8, 12 and 15 percent, change the maturity value of the same SIP.
- Showing the split between money you invested and estimated returns to see the effect of compounding.
- Planning a step in monthly contribution and checking how many more years are needed to hit a savings goal.
- Deciding on a realistic monthly amount by testing several figures before committing to an auto-debit.
How to use the SIP Calculator
- Enter your monthly investment, the fixed amount you plan to invest each month.
- Enter the expected annual return as a percentage (for example 12 for 12 percent).
- Enter the investment period in whole years.
- Read the total invested, estimated returns and maturity value shown instantly below the inputs.
- Use the Copy result button to save the figures, then adjust the inputs to compare scenarios.
Formula & method
Worked examples
You invest 5,000 every month at an expected 12 percent annual return for 10 years.
- Monthly rate i = 12 / 100 / 12 = 0.01
- Number of months n = 10 x 12 = 120
- Growth factor (1 + i)^n = 1.01^120 = 3.300387
- FV = 5000 x ((3.300387 - 1) / 0.01) x 1.01 = 1,161,695
- Total invested = 5000 x 120 = 600,000
- Estimated returns = 1,161,695 - 600,000 = 561,695
Result: Maturity value approx 1,161,695, of which about 561,695 is estimated returns on 600,000 invested.
You invest 10,000 every month at an expected 10 percent annual return for 15 years.
- Monthly rate i = 10 / 100 / 12 = 0.0083333
- Number of months n = 15 x 12 = 180
- Growth factor (1 + i)^n = 1.0083333^180 = 4.453920
- FV = 10000 x ((4.453920 - 1) / 0.0083333) x 1.0083333 = 4,179,243
- Total invested = 10000 x 180 = 1,800,000
- Estimated returns = 4,179,243 - 1,800,000 = 2,379,243
Result: Maturity value approx 4,179,243, with about 2,379,243 in estimated returns on 1,800,000 invested.
Maturity of a 5,000 monthly SIP at 12 percent expected return by duration
| Years | Total invested | Maturity value | Estimated returns |
|---|---|---|---|
| 5 years | 300,000 | 412,432 | 112,432 |
| 10 years | 600,000 | 1,161,695 | 561,695 |
| 15 years | 900,000 | 2,522,880 | 1,622,880 |
| 20 years | 1,200,000 | 4,995,740 | 3,795,740 |
| 25 years | 1,500,000 | 9,488,175 | 7,988,175 |
How the expected return changes a 5,000 monthly SIP over 10 years
| Annual return | Total invested | Maturity value | Estimated returns |
|---|---|---|---|
| 8 percent | 600,000 | 920,828 | 320,828 |
| 10 percent | 600,000 | 1,032,760 | 432,760 |
| 12 percent | 600,000 | 1,161,695 | 561,695 |
| 15 percent | 600,000 | 1,393,286 | 793,286 |
Common mistakes to avoid
- Treating the expected return as guaranteed. A SIP calculator uses one fixed rate, but market-linked mutual funds do not deliver the same return every year. Some years are negative. Use the figure as a mid-point estimate and run a lower rate too, so you plan around a range rather than a single number.
- Confusing the annual rate with the monthly rate. The maturity formula uses the monthly rate, the annual return divided by 12, not the full annual percentage. Putting the annual rate straight into the growth term hugely overstates the result. This SIP calculator does the division for you, but check it when working by hand.
- Ignoring inflation and taxes. The maturity value is in future money. Inflation reduces what it will actually buy, and gains may be taxed on redemption. A corpus that looks large in 20 years is worth less in today's terms, so compare it against an inflation-adjusted goal.
- Forgetting to step up contributions. The calculator assumes the same monthly amount for the whole period. In reality incomes usually rise, so a flat SIP understates what a step-up plan can build. If you expect to increase your monthly amount, model it in stages rather than one flat figure.
Glossary
- SIP (Systematic Investment Plan)
- A method of investing a fixed amount at regular intervals, usually monthly, into a mutual fund or similar instrument.
- Maturity value
- The projected total worth of all your SIP contributions plus returns at the end of the investment period.
- Total invested
- The plain sum of money you contributed: monthly amount multiplied by the number of months.
- Estimated returns
- The maturity value minus the total invested, the portion added by compounding growth.
- Annuity due
- A series of equal payments made at the start of each period, giving each contribution one extra period of growth.
- Dollar-cost averaging
- Investing a fixed amount on a regular schedule so you buy more units when prices are low and fewer when high, smoothing your average cost.
Frequently asked questions
What is a SIP calculator?
A SIP calculator is a tool that estimates the maturity value of a Systematic Investment Plan. You enter a fixed monthly investment, an expected annual return and a number of years, and it projects your total invested, your estimated returns and the final maturity value using compound growth.
How does the SIP calculator work?
It applies the future value of an annuity due. With a monthly rate i (annual return divided by 12) and n months, the maturity value is P x (((1 + i)^n - 1) / i) x (1 + i), where P is the monthly investment. Total invested is P x n, and estimated returns are the maturity value minus total invested.
Is the SIP return guaranteed?
No. The maturity figure assumes one constant rate of return, but mutual fund returns are market-linked and vary every year, including negative years. The calculator is a planning estimate, not a promise. Run a lower expected return as well to see a conservative outcome.
What is a realistic expected return to use?
It depends on the fund type and your horizon. Equity mutual funds have historically averaged roughly 10 to 12 percent over long periods, though with wide swings, while debt funds are lower. Use a conservative rate for planning and treat higher figures as an optimistic case, not a certainty.
How is a SIP different from a lump sum investment?
A SIP spreads a fixed amount across regular monthly instalments, so you buy at many different prices over time (dollar-cost averaging). A lump sum invests everything at once. A SIP reduces timing risk and suits steady income, while a lump sum can grow more if invested early in a rising market.
Does the SIP calculator account for inflation and taxes?
No. It shows a nominal maturity value in future money and does not subtract inflation, fund fees or taxes on gains. To judge real buying power, compare the result against an inflation-adjusted goal, and remember that taxes on redemption will reduce the amount you actually keep.
Sources
- Dollar-Cost Averaging (DCA) , Investopedia (2024)
- Systematic Investment Plan (SIP) , Investopedia (2024)
- Mutual Funds and ETFs: A Guide for Investors , U.S. Securities and Exchange Commission (Investor.gov) (2023)