SIP Calculator — Calculate SIP Returns & Future Value Online | AliGreat.com

Free SIP Calculator for India — see your monthly SIP’s projected corpus, invested amount and estimated returns instantly, with the full formula explained.

 

 

A Systematic Investment Plan, or SIP, has become the default way most working Indians build long-term wealth through mutual funds. Instead of trying to time the market with a large one-time investment, you commit to putting in a fixed amount every month — ₹500, ₹5,000, ₹50,000, whatever fits your budget — and let compounding do its slow, steady work over years. The question every SIP investor eventually asks is simple but not easy to answer in your head: what will this actually be worth in 10, 15 or 20 years? That is exactly what the SIP Calculator on AliGreat.com works out for you, instantly and for free.

What does the SIP Calculator do?

Enter three numbers — your monthly investment amount, the annual return rate you expect, and the number of years you plan to stay invested — and the calculator instantly shows you three results:

• Estimated future corpus — what your investment is projected to be worth at the end of the period
• Total amount invested — the sum of all your monthly instalments, with no growth applied
• Estimated gains — the difference between the two, which represents what compounding has done for you

All three numbers update live as you move any slider, so you can experiment freely with different amounts, rates, and time periods without re-entering anything.

The formula behind it

SIP maths is built on the future value of a series of monthly investments, sometimes called an annuity-due calculation because each instalment is assumed to be invested at the start of the month:

M = P × {[(1 + r)ⁿ − 1] / r} × (1 + r)

Here:

• M is the maturity value (your final corpus)
• P is your fixed monthly SIP amount
• r is the monthly rate of return, calculated as your annual rate divided by 12 and then by 100
• n is the total number of monthly instalments (years × 12)

This formula is more involved than a simple compound interest calculation because every monthly instalment compounds for a different length of time. Your very first instalment sits invested for the entire duration and compounds the most; your very last instalment barely has time to grow at all. The formula accounts for every single instalment’s individual compounding period and sums them all together.

A worked example

Suppose you invest ₹10,000 every month for 15 years, expecting a 12% annual return.

• Monthly rate, r = 12 ÷ 12 ÷ 100 = 0.01
• Number of months, n = 15 × 12 = 180
• Total invested = ₹10,000 × 180 = ₹18,00,000

Plugging into the formula gives a projected maturity value of roughly ₹50,45,760 — meaning your gains alone, purely from compounding, come to around ₹32,45,760, almost double what you actually put in. This is the essential magic of a long-tenure SIP: over 15 years, your gains can end up larger than your total contributions.

Now compare that to the same ₹10,000 monthly SIP for just 5 years at the same 12% return: total invested is ₹6,00,000, but the maturity value comes to roughly ₹8,24,000 — gains of only about ₹2,24,000. The tenure difference between 5 and 15 years doesn’t just triple the corpus; it makes compounding do proportionally far more of the work, which is the single biggest lever in SIP investing.

Why the “expected return” assumption matters so much

A SIP calculator is only as reliable as the rate you feed into it, and this is the single biggest source of unrealistic expectations among first-time investors. Equity mutual funds in India have historically delivered somewhere in the range of 10–14% annually over long holding periods, but that figure is an average across years that included both 30%+ gains and sharp double-digit losses — it is not a guaranteed yearly number, and no fund can promise it.

A more disciplined approach is to run your numbers three times: once at a conservative 10%, once at a moderate 12%, and once at an optimistic 14%. Looking at the spread between these three outcomes gives you a realistic range rather than a single number you might anchor on too confidently. Debt-oriented mutual funds and hybrid funds typically deliver lower but steadier returns, often in the 7–9% range, and should be modelled with correspondingly lower rate assumptions.

SIP vs lumpsum — a quick comparison

A SIP is as much a behavioural tool as it is an investment strategy. By committing to invest the same amount every month regardless of what the market is doing, you automatically buy more units when prices are low and fewer when prices are high — a phenomenon often called rupee-cost averaging. More importantly, it removes the temptation to “wait for the right time,” which for most investors simply never arrives, or arrives after the opportunity has passed.

If you already have a large sum sitting idle — a bonus, a matured FD, an inheritance — a lumpsum investment is often the mathematically better choice, since markets historically rise more years than they fall, and delaying that money’s entry into the market by spreading it out via SIP can leave gains on the table. AliGreat.com’s Lumpsum Calculator is built specifically for that scenario. In practice, most investors use both: SIP for money that arrives every month from a salary, and lumpsum for money that’s already sitting idle.

The power of stepping up your SIP

One detail this basic calculator doesn’t automatically apply, but that’s worth manually testing, is a “step-up” SIP — increasing your monthly contribution every year in line with your salary growth. Even a modest 10% annual step-up can meaningfully increase your final corpus compared to a flat monthly amount held constant for 15–20 years, since the later, larger instalments still get several years to compound. Try running the calculator at your current SIP amount, and then again at what you expect that amount to grow to in 5 years, to get a feel for the difference a step-up strategy can make.

Common mistakes SIP investors make

1. Stopping the SIP during a market downturn. This is precisely the wrong time to stop, since lower prices mean each instalment buys more units — pausing during a fall locks in the very outcome a SIP is designed to avoid.
2. Choosing too short a tenure for equity exposure. Equity SIPs need time to smooth out volatility; a 2–3 year SIP in an equity fund carries meaningfully more risk of a disappointing outcome than a 10–15 year one.
3. Ignoring the expense ratio and fund selection. The rate you enter in this calculator is an assumption for planning purposes — the actual return your money earns will depend heavily on which specific fund you choose and its costs.
4. Forgetting taxation on withdrawal. Long-term capital gains on equity mutual funds are taxed once withdrawn, above a specified exemption limit — a detail worth factoring in when planning your final target corpus, since your post-tax amount will be somewhat lower than the raw calculator output.

Who should use this calculator

Anyone planning a long-term financial goal through mutual fund SIPs — retirement, a child’s higher education, a house down payment, or simply general wealth building — will find this calculator useful before committing to a monthly amount. It’s equally useful in reverse: if you already know your target corpus (say, ₹1 crore in 20 years), you can adjust the monthly amount slider until the projected corpus matches your goal, effectively working backward to find the SIP amount you need to commit to.

Frequently asked questions

Is the SIP calculator’s result guaranteed? No. The result is a projection based on the return rate you enter, which is an assumption, not a promise. Actual mutual fund returns vary with market performance.

What’s a realistic SIP return to assume for equity funds in India? Most financial planners suggest using a range of 10–12% for long-term equity SIP planning, rather than anchoring on a single optimistic figure.

Does this calculator account for expense ratio or exit load? No — it calculates pure future value based on your inputs. Expense ratios and exit loads are fund-specific and will slightly reduce your actual real-world return compared to the calculator’s projection.

Can I use this for a SIP in gold or debt funds, not just equity? Yes — the formula is universal. Simply enter the expected return rate appropriate for that asset class (typically lower and steadier for debt, more volatile for equity and gold).

Try it now

Open the SIP Calculator on AliGreat.com, adjust the sliders to match your own numbers, and watch your projected wealth build in real time — free, instant, and with every formula shown so the final number is never a mystery.