Explainer 6 min read

What Is a Mutual Fund SIP and How Does It Work?

Complete beginner guide to SIP (Systematic Investment Plan) in mutual funds. How it works, returns, and how to start.

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What Is a Mutual Fund SIP?

A Systematic Investment Plan (SIP) is a method of investing a fixed amount in a mutual fund at regular intervals — typically monthly. It is not an investment product itself; it is the method of investing in mutual funds.

When you set up a SIP, a fixed amount (minimum Rs 500/month in most funds) is automatically debited from your bank account on your chosen date and used to purchase mutual fund units at that day's Net Asset Value (NAV).

How SIP Works — Step by Step

  • You choose a mutual fund and a monthly SIP amount
  • You set a date (typically the 1st-7th of the month)
  • A bank mandate is set up for automatic debit
  • Every month, the SIP date arrives and your bank debit occurs
  • The debited amount buys mutual fund units at that day's NAV
  • You accumulate units over time at different prices
  • Rupee Cost Averaging: The Core Advantage

    When markets are down, your monthly SIP buys more units. When markets are up, it buys fewer. Over time, your average purchase price is lower than the average market price. This is Rupee Cost Averaging.

    Example over 3 months with Rs 10,000 monthly SIP:

    Month 1: NAV Rs 100 → buys 100 units

    Month 2: NAV Rs 80 → buys 125 units

    Month 3: NAV Rs 120 → buys 83.3 units

    Average NAV: Rs 100. Units bought: 308.3. Average cost per unit: Rs 97.3. You paid less on average than the arithmetic average price.

    SIP Returns at Different Rates

    At 12% CAGR (historical equity mutual fund average in India):

    SIP Amount5 Years10 Years20 Years

    |---|---|---|---|

    Rs 5,000/monthRs 4.1LRs 11.6LRs 49.9L
    Rs 10,000/monthRs 8.2LRs 23.2LRs 99.9L
    Rs 25,000/monthRs 20.5LRs 58.0LRs 2.5Cr

    Types of Mutual Funds for SIP

    Equity mutual funds: Invest in stocks. Higher long-term returns (8-15% CAGR historically) with higher volatility. Best for 5+ year goals.

    Debt mutual funds: Invest in bonds. Lower returns (6-8%) but lower risk. Good for 1-3 year goals.

    ELSS (tax saving): Equity funds with Rs 1.5 lakh 80C deduction benefit and 3-year lock-in. Best tax-saving investment for those with higher income.

    How to Start an SIP

  • Complete KYC: PAN card + Aadhaar OTP on any investment platform
  • Choose a platform: Groww, Zerodha Coin, Paytm Money, or directly on AMC websites
  • Select a fund: Nifty 50 index fund is an excellent default for beginners
  • Set amount and date: Minimum Rs 500/month
  • Complete bank mandate: One-time bank mandate setup for auto-debit
  • Total time to first SIP: About 15-30 minutes for first-time KYC, 5 minutes thereafter.

    Frequently asked questions

    Is SIP safe for investment?

    Equity SIPs carry market risk — the value can go up or down. Over long periods (7+ years), equity mutual funds have historically delivered positive returns in India. Debt SIPs have lower risk with lower returns.

    What is the minimum SIP amount?

    Most mutual funds allow SIPs from Rs 500 per month. Some ELSS funds require Rs 500 per month; some specialized funds require higher minimums.

    Can I stop or change my SIP?

    Yes — you can pause, stop, or change the SIP amount anytime through your investment platform. There are no exit loads specifically for stopping SIP (though the fund may have exit loads for early redemption).

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