Kalkulator SIP

Plan your SIP or monthly investment

This free SIP calculator shows what a monthly investment could grow into over time, splitting the result into the money you contributed and the estimated returns on top. Enter your monthly amount, an expected annual return and a time horizon, and the future value updates instantly — no sign-up, no spreadsheet, no page reload.

Whether you call it a Systematic Investment Plan into a mutual fund or dollar-cost averaging into an index fund, the maths is identical, and this tool handles both. It defaults to US dollars and lets you switch to the rupee, euro, pound, yen and more, so it works equally well for a mutual-fund SIP or a monthly 401(k) or IRA contribution.

How the SIP calculator works

Each monthly instalment is invested and then compounds for the months that remain until the end of the term, so the final value is the sum of every contribution plus its growth. The standard formula is FV = P × [((1 + i)ⁿ − 1) / i] × (1 + i), where P is the monthly amount, i is the monthly rate (your annual rate divided by 12) and n is the number of months.

To stay accurate with a step-up, the calculator simulates the investment month by month rather than relying on the closed-form formula alone. The growth chart then plots your cumulative invested amount against your estimated gains year by year, and the breakdown table lists the value at the end of every year.

Step-up SIP: invest more as you earn more

A step-up SIP raises your contribution by a set percentage each year — a natural fit if your income grows. Because the bigger later contributions still have years to compound, even a 5–10% annual step-up can add a large amount to your final corpus compared with a flat SIP. Add a step-up percentage above and watch the projected value and the chart respond.

Most SIP calculators on platforms like Groww or ET Money include a step-up option too, but their tools are designed to funnel you into their app's fund selection. Here the calculation stands alone — useful if you're comparing across multiple platforms or planning before you've picked a fund.

SIP vs lumpsum

The tool also compares your SIP against a lumpsum of the same total money invested upfront. For an equal amount and return, the lumpsum usually finishes ahead, because every unit of money compounds for the full term instead of trickling in over the years. A SIP, however, only needs a small amount each month and spreads your entry across many market prices, which removes the risk of investing everything at a single unlucky moment. Most investors use a SIP for regular savings and deploy a lumpsum when they receive a windfall.

Choosing an expected return

Your result is only as good as the return you assume. Diversified equity has historically delivered roughly 10–12% a year over long periods, but no return is guaranteed and individual years can be deeply negative. Model a conservative figure, and use the year-by-year table to sense-check how sensitive your goal is to a couple of percentage points. The projection is a smooth line; real portfolios rise and fall along the way.

Reach a target with Goal mode

Know how much you want but not how much to invest? Switch to Goal mode, enter your target — say ₹1 crore or $1 million — along with your return and number of years, and the calculator solves for the exact monthly SIP required. It is the fastest way to turn a savings goal into a concrete monthly habit, and to see how a longer horizon dramatically lowers the monthly amount you need.

Every calculation — future value, total invested, estimated gains, the growth chart and the breakdown table — runs entirely in your browser. Your figures are never uploaded or stored on a server.

The SIP formula explained — with a worked rupee example

The future value of a SIP is computed using the annuity-due formula: FV = P × [(1 + r)ⁿ − 1] / r × (1 + r), where P is the fixed monthly instalment, r is the monthly interest rate (annual rate ÷ 12, expressed as a decimal), and n is the total number of monthly instalments. The trailing × (1 + r) term accounts for the fact that each instalment is invested at the beginning of the month, giving it one extra month of compounding compared with a standard end-of-period annuity.

To make this concrete: suppose you invest ₹10,000 per month for 15 years at an assumed annual return of 12%. Here r = 0.12 / 12 = 0.01, and n = 15 × 12 = 180. Plugging in: FV = 10,000 × [(1.01)¹⁸⁰ − 1] / 0.01 × 1.01. (1.01)¹⁸⁰ ≈ 5.9958, so the bracket becomes (5.9958 − 1) / 0.01 = 499.58, and multiplied by 1.01 and then ₹10,000, the result is roughly ₹50.46 lakh. Your own money contributed is ₹10,000 × 180 = ₹18 lakh, meaning an estimated ₹32.46 lakh — nearly 64% of the corpus — is pure compounding, not savings.

For step-up SIPs the closed-form formula no longer applies directly, because P changes every year. The calculator therefore simulates each month individually, increasing P at each annual anniversary by the step-up percentage, and sums the month-by-month future values. The result is arithmetically equivalent to applying the formula in twelve-month segments with a revised P each year, but the simulation approach is easier to audit and extend.

Compounding and rupee-cost averaging — why time beats timing

Rupee-cost averaging (or dollar-cost averaging outside India) is the automatic benefit of investing a fixed amount at regular intervals regardless of market conditions. When the Net Asset Value (NAV) of a fund falls, your fixed instalment buys more units; when NAV rises, it buys fewer. Over a full market cycle this averaging lowers your effective cost per unit below the simple average NAV, because more units are accumulated during the cheaper periods. It is not a guarantee of profit, but it systematically removes the pressure — and the cognitive cost — of timing every entry.

The deeper force at work is compound growth. In the ₹10,000-a-month example above, the estimated ₹32 lakh in growth is itself generating returns on its returns: early gains compound for the remaining years of the term, and that acceleration steepens dramatically the longer you stay invested. Consider two investors who both put in ₹10,000 a month at 12% — one for 20 years and one for 25 years. The 20-year corpus reaches roughly ₹99.9 lakh (almost ₹1 crore); the 25-year corpus reaches roughly ₹1.89 crore. An extra five years of contributions of just ₹6 lakh produces an additional ₹89 lakh of estimated wealth — a ratio that illustrates why compounding is often called the eighth wonder of the world.

Starting five years earlier also means buying through an extra full market cycle, typically including a correction that allows rupee-cost averaging to load up on units at lower prices — reinforcing both effects simultaneously. The single most impactful variable in any long-term SIP is not the return assumption but the number of years invested, which is entirely within an investor's control.

SIP vs lump sum — when each approach wins

In a purely mathematical comparison with identical capital and returns, a lump-sum investment outperforms a SIP over the same period, because every rupee is invested on day one and compounds for the full term rather than trickling in over months. For example, a one-time ₹12 lakh invested for 10 years at 12% grows to roughly ₹37.2 lakh, whereas ₹10,000 per month (also ₹12 lakh total) over the same period produces roughly ₹23.2 lakh. The lump sum has a meaningful lead purely because of the time advantage.

In practice, however, volatile and falling markets change the calculus entirely. Studies of the NIFTY 50 and SENSEX across rolling 10-year windows consistently show that SIP strategies outperform lump-sum deployment in periods that include significant market corrections — because SIP investors accumulate more units at lower prices during drawdowns, while the lump-sum investor is fully exposed from the peak. Data from the Association of Mutual Funds in India (AMFI) shows that the majority of diversified equity SIPs held for 10 or more years have delivered positive inflation-beating returns even when started at market peaks.

There is also a behavioral finance advantage to SIPs that pure numbers cannot capture. A lump-sum investor must decide when to deploy a large amount, a decision notorious for triggering loss aversion, recency bias and paralysis. An automated SIP removes the decision entirely: the NACH (National Automated Clearing House) mandate debits the account on the chosen date every month regardless of market sentiment. Research consistently shows that investors who automate contributions end up with better outcomes than those who try to time entries — not because automation is smarter, but because it eliminates the emotional decisions that erode returns. The practical rule is simple: deploy a lump sum when you genuinely have it and markets are not at an obvious extreme; use a SIP for monthly surplus income or whenever timing uncertainty is high.

Step-up SIPs, ELSS, and tax-efficient investing

A step-up SIP (also called a top-up SIP) increases the monthly instalment by a fixed percentage every year, typically 10–15%, to keep pace with income growth. The compounding impact of this escalation is dramatic. Take two investors starting at ₹5,000 per month for 20 years at 12%: the flat SIP investor accumulates roughly ₹49.9 lakh, having put in ₹12 lakh of capital. The investor who increases contributions by 10% each year starts at the same ₹5,000 but ends at ₹30,628 per month in year 20, and the corpus reaches approximately ₹1.27 crore — more than 2.5 times the flat SIP result — while total contributions are around ₹34.4 lakh. The difference is not from a higher return rate but purely from the compounding of larger instalments in later years.

ELSS (Equity Linked Savings Scheme) mutual funds are a particularly tax-efficient vehicle for SIP investing in India. Contributions to ELSS up to ₹1.5 lakh per financial year qualify for a deduction under Section 80C of the Income Tax Act, reducing taxable income in the year of investment. ELSS funds carry a mandatory three-year lock-in per instalment — the shortest lock-in of any 80C instrument — and are invested predominantly in equities, making them suitable for long-term wealth creation alongside tax saving. Because each monthly SIP instalment has its own three-year lock-in date, running an ELSS SIP for several years results in a staggered series of unlocking dates rather than a single exit point, giving investors flexibility.

Beyond ELSS, other mechanics matter when running a real SIP: NAV is declared daily and the applicable NAV for a SIP instalment is the NAV of the date on which cleared funds reach the fund house (typically T+1 after the debit date). Statistical analysis across NSE data shows that the final corpus is virtually identical regardless of whether the SIP date is the 1st, 5th, 10th or 15th of the month — the difference over a 10-year horizon is less than 0.5%, so investors should not delay starting a SIP while searching for the optimal date. Exit loads — typically 1% if redeemed within one year of each instalment — apply to most equity funds and should be factored in if you anticipate partial withdrawals in the early years.

Inflation-adjusted returns — what your corpus is really worth

A nominal return of 12% per year sounds impressive, but it does not tell you how much purchasing power your corpus will carry in the future. If consumer price inflation runs at 4% annually — close to the Reserve Bank of India's medium-term target — the real return on a 12% nominal investment is approximately (1.12 / 1.04) − 1 ≈ 7.7% per year. Over 20 years the difference between nominal and real corpus value is substantial: a nominal ₹99.9 lakh corpus built on a ₹10,000 monthly SIP at 12% has a real (inflation-adjusted) value of roughly ₹45–47 lakh in today's rupees, not ₹1 crore.

To compute your inflation-adjusted target corpus, apply the same logic in reverse: if you need ₹50 lakh in today's money 20 years from now, and inflation is 4%, the nominal amount you must accumulate is ₹50 lakh × (1.04)²⁰ ≈ ₹1.10 crore. You can then use Goal mode to find the monthly SIP that reaches that higher nominal figure. Alternatively, simply subtract the inflation rate from your expected nominal return — using 8% instead of 12% in the calculator — to work entirely in real terms and interpret the result as today's purchasing power.

The distinction between nominal and real returns becomes especially important for retirement planning, where the corpus built today must fund spending 20–30 years in the future. A seemingly large projected number at a 12% nominal return can still fall short of genuine needs if inflation erodes purchasing power faster than anticipated. Conservative financial planning therefore uses a real return assumption of 6–8% for equity-heavy portfolios in India, reserves a portion in inflation-linked instruments, and revisits the plan every few years as actual inflation and return data accumulates.