What is the SIP Calculator?
A SIP (Systematic Investment Plan) Calculator helps you estimate the future value of your mutual fund investments made at regular intervals — typically monthly. You enter your monthly investment amount, expected annual return rate, and investment duration, and the calculator shows you how much your corpus will grow to. For Indians building long-term wealth, this tool bridges the gap between a monthly savings habit and a retirement or goal corpus number.
India's mutual fund industry, regulated by SEBI, has seen SIP contributions cross ₹26,000 crore per month as of early 2026, reflecting a massive shift toward market-linked savings. Unlike fixed deposits or recurring deposits, SIPs in equity mutual funds have historically delivered 10–14% annualised returns over 10+ year horizons, significantly outpacing inflation. With the Nifty 50 TRI delivering roughly 13% CAGR over the last two decades, SIPs remain one of the most accessible wealth-building tools for salaried Indians.
Whether you are saving for a child's education, a home down payment, or retirement under the NPS framework, understanding exactly how your SIP compounds over time empowers you to set realistic targets. This calculator removes guesswork and helps you answer the most important question: am I saving enough, and for long enough?
How does it work?
The SIP calculator uses the future value of a recurring annuity formula: M = P × [(1 + r)^n – 1] / r × (1 + r), where M is the maturity amount, P is the monthly SIP instalment, r is the monthly rate of return (annual rate divided by 12), and n is the total number of instalments (years × 12). The final multiplication by (1 + r) accounts for the fact that SIP instalments are invested at the beginning of each period, making it an annuity-due rather than an ordinary annuity.
Each input carries real weight. The monthly investment (P) is straightforward — the fixed amount you commit each month. The expected annual return (r) is the trickiest input: equity large-cap funds average 11–13% over long horizons, balanced advantage funds around 10–11%, and debt funds 6–8%. You should use conservative estimates (10–11% for equity) rather than recent high-return years to avoid overestimating your corpus. The time horizon (n in years) is the most powerful lever due to compounding — doubling your duration can more than quadruple your corpus.
Note that the calculator shows pre-tax, nominal returns. In India, long-term capital gains (LTCG) on equity mutual fund units held over 12 months are taxed at 12.5% on gains exceeding ₹1.25 lakh per financial year (as per the Finance Act 2024, applicable from FY 2024-25 onwards). For debt funds purchased after April 1, 2023, gains are taxed at your income tax slab rate with no indexation benefit. Factor in these tax implications when planning your actual post-tax corpus.
Worked example
Consider Priya, 29, a software engineer in Pune earning ₹14 LPA. She wants to build a retirement corpus by age 55 — a 26-year horizon. She decides to start a SIP of ₹15,000 per month in a diversified equity index fund, expecting a conservative 11% annual return. Plugging into the formula: r = 11%/12 = 0.9167%, n = 26 × 12 = 312 months. Her estimated maturity corpus works out to approximately ₹2.1 crore. Her total investment over 26 years is ₹15,000 × 312 = ₹46.8 lakh — meaning compounding generates over ₹1.63 crore in wealth on top of her own contributions.
Now suppose Priya delays by just five years and starts at 34 with the same ₹15,000/month for 21 years. Her corpus drops to roughly ₹1.2 crore — nearly ₹90 lakh less, despite investing only ₹9 lakh less in principal. This is the compounding penalty of delay. If she also increases her SIP by 10% each year using a step-up SIP (investing ₹15,000 in year 1, ₹16,500 in year 2, and so on), her 26-year corpus at 29 swells to over ₹3.8 crore — illustrating why starting early and increasing contributions with salary hikes is the single most impactful strategy for Indian salaried investors.
When to use this calculator
- 1Planning retirement savings to estimate how much monthly SIP is needed to build a target corpus by age 58–60, especially if you are not covered by a pension scheme and rely only on EPF and personal investments.
- 2Setting a goal-based SIP amount for a child's higher education fund — for example, calculating how much to invest monthly over 15 years to accumulate ₹50 lakh for college fees in 2040.
- 3Deciding between a lump sum investment and a staggered SIP, particularly after receiving an annual bonus or ESOP proceeds, to understand the opportunity cost of each approach.
- 4Reviewing whether your current SIP amount is on track during annual financial planning — especially useful after an increment when you want to calculate the impact of stepping up your SIP by ₹2,000–₹5,000 per month.
- 5Comparing returns across different mutual fund categories (equity vs. hybrid vs. debt) by changing the expected return rate, helping you choose the right fund type for your specific goal timeline.
Common mistakes to avoid
- ✕Stopping or pausing SIPs during market downturns — this is the most expensive mistake. Market corrections are precisely when SIPs buy more units at lower NAVs, improving long-term average cost (rupee cost averaging). Investors who paused SIPs in March 2020 missed one of the sharpest recoveries in Indian market history.
- ✕Using recent 3-year or 5-year returns (which may include a strong bull run) as the expected return in the calculator instead of long-term 15–20 year CAGR figures, leading to grossly overestimated corpus projections and under-saving.
- ✕Ignoring inflation when setting a goal corpus — ₹1 crore today will be worth far less in 20 years at 6% inflation (roughly ₹30–35 lakh in today's purchasing power). Always calculate a real-return-adjusted target before deciding your SIP amount.
- ✕Investing in too many SIPs across 8–10 funds for diversification, when 2–3 well-chosen funds across large-cap, flexi-cap, and one international or mid-cap fund provide adequate diversification without overlapping portfolios and tracking complexity.
- ✕Neglecting to increase SIP amount annually in line with income growth — a flat ₹5,000 SIP started in 2015 and never revised has significantly lower real value due to inflation, whereas a 10% annual step-up would more than double the final corpus over a 20-year period.
Frequently asked questions
- Is SIP return taxable in India and how much tax will I pay on my mutual fund SIP gains?
- Yes, SIP returns are taxable in India. For equity mutual funds (including equity-oriented hybrid funds), each SIP instalment is treated as a separate investment. Units held for more than 12 months qualify for Long-Term Capital Gains (LTCG) tax at 12.5% on gains exceeding ₹1.25 lakh in a financial year, with no indexation benefit (applicable from FY 2024-25 per Finance Act 2024). Gains on units sold within 12 months attract Short-Term Capital Gains (STCG) tax at 20%. For debt mutual funds purchased on or after April 1, 2023, all gains — regardless of holding period — are taxed at your applicable income tax slab rate.
- What is a realistic expected return rate to use in a SIP calculator for Indian mutual funds?
- For long-term financial planning (10+ years), use 10–12% for diversified equity/large-cap funds, 11–13% for flexi-cap or mid-cap funds, and 6–7.5% for debt funds. Avoid using the last 1–3 year returns of any fund as your estimate — recent bull markets can show 20%+ returns that are not sustainable. SEBI mandates that mutual fund advertisements use benchmark-relative performance, not projected returns, precisely to prevent over-optimistic assumptions. A conservative 10–11% for equity is appropriate for goal planning.
- What is the minimum SIP amount and can I start a SIP with ₹500 per month?
- Yes, many SEBI-registered mutual funds in India allow SIPs starting at ₹100–₹500 per month. AMFI (Association of Mutual Funds in India) data shows that the average SIP ticket size in 2025 is around ₹2,300 per month. You can start small and use the step-up SIP feature offered by most fund houses to increase your investment amount annually — typically 5–10% per year — aligned with salary increments. Platforms like MF Central, Zerodha Coin, Groww, and direct fund house websites all support small-ticket SIPs with paperless KYC via Aadhaar-based eKYC.
- Should I invest in SIP or PPF or NPS for long-term savings in India?
- All three serve different purposes. PPF offers guaranteed 7.1% (current rate, revised quarterly by the government), full EEE tax exemption (exempt at investment, accumulation, and withdrawal), and sovereign backing — ideal for the risk-free debt portion of your portfolio. NPS (National Pension System) offers an additional ₹50,000 deduction under Section 80CCD(1B) over and above the ₹1.5 lakh 80C limit, with equity allocation up to 75% under Tier I. SIPs in equity mutual funds offer the highest long-term return potential but come with market risk and capital gains tax. A balanced strategy for a salaried Indian might be: maximize NPS for the extra tax deduction, keep ₹1.5 lakh/year in PPF for guaranteed debt exposure, and use SIPs for any additional long-term equity allocation.
- What happens to my SIP if the mutual fund NAV falls sharply — will I lose all my money?
- A falling NAV is not a loss unless you redeem your units. In fact, NAV drops during market corrections are beneficial for SIP investors because the same monthly amount buys more units at lower prices — this is called rupee cost averaging. Mutual funds in India are regulated by SEBI, and no investor has ever lost 100% of their SIP investment in a diversified equity mutual fund over a 7+ year horizon, based on historical data. Your investment is held in your own demat/folio account and is not subject to the mutual fund company's solvency risk. Only concentrated sectoral funds or poorly managed schemes can significantly underperform — which is why diversified index funds or large-cap funds are recommended for first-time SIP investors.