See the compounding, not just the final number
Invested amount vs gains, broken out clearly
Slider-based inputs
Drag to adjust monthly amount, return rate, and period — see the result update instantly as you experiment with different scenarios.
Invested vs gains split
See exactly how much of your maturity value is your own money versus compounded growth, shown as two separate figures.
Private by design
Your investment figures stay in your browser and are never sent to, logged by, or stored on a server.
Why small, regular amounts add up more than people expect
SIP's appeal isn't really about picking the "right" fund — it's about the mechanical effect of investing a fixed amount every month regardless of market conditions, which does two things simultaneously: it builds a disciplined habit that doesn't rely on trying to time the market, and it compounds, meaning each month's gains themselves start earning further gains over the following months. A ₹5,000 monthly SIP doesn't just add up to ₹5,000 times the number of months — the earlier contributions have had more time to compound, which is exactly why extending the investment period, even without increasing the monthly amount, has such an outsized effect on the final maturity value.
This is also why financial planners consistently emphasize starting early over waiting to invest a larger amount later — a smaller SIP started years earlier can outgrow a larger SIP started later, purely because of how many more compounding periods the earlier contributions get. Delaying a SIP by five or ten years to "start bigger" often costs more in lost compounding time than it gains in contribution size.
How the SIP maturity value is actually calculated
This calculator uses the standard SIP future value formula: FV = P × [((1+r)^n − 1) / r] × (1+r), where P is the monthly investment, r is the monthly return rate (annual rate divided by 12, then by 100), and n is the total number of months invested. Each monthly installment is treated as a separate deposit that compounds from the month it's made — so the first month's ₹5,000 has far more months to grow than the final month's ₹5,000, even though both contributions are the same size.
Total invested is simply the monthly amount multiplied by the number of months — a fixed, guaranteed number with no assumptions involved. Total gains is the difference between the estimated maturity value and that total invested figure, and it's entirely dependent on the return rate assumption, which is the one genuinely uncertain input in the whole calculation. This is why the tool shows invested and gains separately rather than just a single maturity number — invested capital is certain, gains are an estimate based on the rate you choose.
It's worth stress-testing your plan against a few different return assumptions rather than relying on a single optimistic number — running the calculator once at a conservative rate and once at a more ambitious rate gives a realistic range for what a goal might actually require, rather than anchoring on a single potentially unrealistic figure.
When people use a SIP calculator
A few common situations
🎯 Goal-based investing
Work backward from a target amount (a home down payment, a child's education) to a required monthly SIP.
📊 Comparing investment periods
See how extending a SIP from 10 to 15 years changes the maturity value, holding the monthly amount fixed.
💰 Retirement planning
Estimate how a long-term monthly SIP could grow toward a retirement corpus.
📈 Comparing return-rate scenarios
Run conservative, moderate, and optimistic return assumptions side by side to understand the range of outcomes.
🧮 Sanity-checking a fund's projection
Cross-check a maturity figure quoted by an advisor or app against an independent calculation.
🎓 Understanding compounding
See concretely how gains compound over a long investment period rather than growing linearly.
💵 Step-up SIP planning
Estimate a baseline maturity value before layering in annual increases to your monthly contribution.
🏦 Comparing SIP vs lump sum
Understand roughly how a monthly SIP's growth compares to investing the same total amount as a lump sum.
Step-up SIP: increasing your contribution over time
Many investors start a SIP at an amount that fits their current budget and increase it as their income grows — a strategy often called a "step-up" or "top-up" SIP. This calculator estimates a maturity value assuming a constant monthly amount for the full duration, which gives you a solid baseline figure. If you plan to increase your contribution annually (a common approach is stepping up by 10% each year in line with salary increments), your actual maturity value would be higher than this baseline estimate, since later contributions would be larger than the amount modeled here.
Using this calculator's baseline as a conservative floor, and treating any step-up as additional upside, is a reasonable way to plan without needing a more complex calculator that models variable contributions explicitly.
How the SIP amount changes the outcome
Illustrative example — a few different investment periods, holding the monthly amount and return rate steady
| Duration | Total invested | Estimated maturity value |
|---|---|---|
| 5 years | ₹3,00,000 | ≈ ₹4,12,000 |
| 10 years | ₹6,00,000 | ≈ ₹11,61,000 |
| 15 years | ₹9,00,000 | ≈ ₹25,23,000 |
| 20 years | ₹12,00,000 | ≈ ₹49,96,000 |
Notice how the gap between invested amount and maturity value widens dramatically the longer the SIP runs — this is compounding at work, and it's exactly why starting early matters more than the exact monthly amount for long-term goals. These figures are illustrative estimates based on a constant assumed return; actual mutual fund returns vary year to year, and a real portfolio would rarely produce a perfectly smooth curve like the one implied by this table.
SIP vs lump sum investing
A SIP spreads investment across many smaller monthly purchases, which naturally averages the purchase price of fund units across market highs and lows — a concept called rupee-cost averaging. This tends to smooth out the impact of market volatility compared to investing the entire amount at once, since you're not betting the full sum on a single entry point. A lump sum investment, by contrast, is fully exposed to the market from day one, which can outperform a SIP in a rising market but carries more downside risk if invested right before a downturn, since there's no averaging effect to soften a poorly timed entry.
For most individual investors without a large sum available upfront, or those who prefer not to time the market, SIP is the more practical and psychologically easier approach — it builds a consistent investing habit and removes the pressure of deciding "when" to invest a large amount. Neither approach is universally superior; the right choice depends on how much capital is available at once, risk tolerance, and investment horizon. Some investors also combine both — investing a lump sum when available while continuing a regular SIP for ongoing savings — rather than treating the two as mutually exclusive strategies.
Understanding the risk behind the return assumption
Every SIP calculation depends entirely on the return rate you enter, and that rate is an assumption, not a promise — mutual fund returns are market-linked, meaning they fluctuate year to year and can occasionally be negative, even though long-term averages have historically trended positive for well-diversified equity funds. A calculator showing a specific maturity value at a specific rate can create a false sense of precision if the rate itself turns out to be optimistic; treating the output as one plausible scenario among several, rather than a guaranteed outcome, is the more realistic way to use this tool.
Different fund categories also carry different typical return ranges and risk levels — equity funds have historically offered higher long-term returns with more short-term volatility, while debt funds offer steadier but generally lower returns. The rate you choose to model should roughly match the type of fund you actually intend to invest in, not an average across all mutual fund categories, since mixing up the two produces a maturity estimate that doesn't match your actual investment plan.
Quick recap
A SIP's maturity value comes from two very different kinds of numbers — total invested, which is fixed and certain, and total gains, which is an estimate entirely dependent on the return rate you assume. Neither this calculator nor any SIP promises the return rate you enter; treat the maturity figure as a planning estimate, and lean toward a conservative return assumption rather than an optimistic one when the plan matters — a genuine financial goal like a home or retirement.
📖 How to use the SIP calculator
Frequently asked questions
What is SIP?
SIP stands for Systematic Investment Plan — a way to invest a fixed amount regularly, typically monthly, into mutual funds rather than investing a lump sum all at once.
Are SIP returns guaranteed?
No. SIP returns are market-linked and not guaranteed. This calculator gives an estimate based on the return rate you enter, not a promised outcome, and actual fund performance can vary significantly from any single assumption.
Why does SIP use monthly compounding in the calculation?
Because each monthly contribution is treated as a separate investment that compounds from the month it's invested, the calculation applies the annual return rate divided into monthly compounding periods, matching how mutual fund NAV growth is generally modeled.
Is a higher expected return rate realistic to assume?
Historical long-term equity mutual fund returns in India have often ranged 10-15% annually, but past performance doesn't guarantee future returns — use a conservative estimate for planning purposes.
Is this tool free?
Yes, completely free with no signup required.
What's the difference between SIP and lump sum investing?
SIP invests a fixed amount at regular intervals, averaging your purchase price across market ups and downs, while lump sum invests the full amount at once, fully exposed to the market from day one.
Can I stop or change my SIP amount later?
Yes, most mutual fund SIPs allow you to pause, stop, or modify the monthly amount, though this calculator assumes a constant contribution for the full duration entered.
Does this calculator account for taxes on SIP gains?
No, this tool estimates gross maturity value before any applicable capital gains tax, which varies based on holding period and fund type — consult a tax advisor for post-tax figures.
What return rate should I use for planning?
There's no universally correct answer since returns are market-linked and not guaranteed — many planners use a conservative estimate below long-term historical averages to avoid overestimating a goal's feasibility.
Should I choose SIP or a step-up SIP?
A step-up SIP, where the monthly amount increases annually (often in line with salary growth), typically results in a higher maturity value than a constant SIP of the same starting amount — this calculator estimates the constant-amount baseline, which you can treat as a conservative floor.