What a SIP does—and what it cannot promise

Learn / Money essentials

Connect a regular contribution with the underlying fund, the goal and the risks you can actually carry.

SiP Money editorial · 6 minute read · Educational guide

The useful distinction

₹5,000 each month is ₹60,000 contributed over a year. The account value may be higher or lower. Increasing a contribution is an affordability decision as well as a compounding illustration.

In this guide

Each instalment buys units
The fund's risks remain
Use a calculator to test assumptions
Give the habit a purpose
Write a one-paragraph investment brief

A SIP can help turn investing into a regular habit. It cannot turn an uncertain investment into a guaranteed one. Before deciding an amount or looking at a projected future value, understand the difference between the payment arrangement and the investment it buys.

SIP stands for Systematic Investment Plan. AMFI describes it as a route for investing a fixed amount in a mutual-fund scheme at regular intervals, instead of investing the whole amount at once. The SIP is the contribution method; the underlying scheme is where your money is invested. [1]

Each instalment buys units

Your instalment buys units at the applicable net asset value, subject to the scheme and transaction rules. NAV is the value per unit. When that value is lower, the same amount buys more units; when it is higher, the amount buys fewer.

Here is a simplified illustration, ignoring charges. Investing ₹1,000 at a NAV of ₹100 buys 10 units. A second ₹1,000 at a NAV of ₹80 buys 12.5 units. You now own 22.5 units for a total contribution of ₹2,000, an average cost of approximately ₹88.89 per unit.

Buying more units at the lower price has changed your average cost. It has not secured a profit. If the NAV later falls to ₹70, the holding is worth ₹1,575, below the ₹2,000 contributed. Regular investing can spread entry dates, but the value of what you own still matters.

The fund's risks remain

Two SIPs for the same monthly amount can have different risks because they invest in different schemes. Look at the scheme's objective, holdings, costs and current documents. The Riskometer is a useful risk indicator; SEBI explains that underlying assets, market volatility, credit risk and interest-rate sensitivity can affect a fund's risk. [2]

Ask when you need the money and how you would respond if its value fell before then. A contribution schedule does not make a volatile investment suitable for a near-term bill. Check access conditions and any lock-in or exit-load provisions in the specific scheme documents.

Use a calculator to test assumptions

A SIP calculator combines the contribution amount, duration and an assumed return. Changing the assumption changes the result. SEBI explicitly describes its calculator outputs as illustrations and says that stock-market returns are not fixed or predictable. [3]

Check the calculation conventions too: whether contributions occur at the start or end of each period, how an annual rate becomes a monthly rate, and whether a yearly increase in contributions is included. Costs, taxes and inflation can change the usefulness of the displayed future amount.

For a practical first check, look at total contributions before hypothetical growth. A ₹5,000 monthly contribution for ten years means ₹6,00,000 paid in if all 120 instalments occur. That is the saving commitment your cash flow must support.

Give the habit a purpose

Choose a goal and review whether the contribution fits alongside essential expenses, debt and reserves. Review the plan when income or the goal changes. Avoid treating a future lump sum as a promised monthly income: funding later withdrawals requires a separate look at spending, inflation, investment risk and the capital available at that time.

Sources and further reading

Source check: 11 October 2026. Refer to the period and terms applicable to your decision.

Write a one-paragraph investment brief

State the purpose, date, affordable monthly contribution and access needs. Add what you would do if the fund value fell. Compare the scheme against that brief before comparing past returns.

Try this before your next decision

Write your assumptions beside the numbers. Change one assumption at a time and compare the effect. If the answer depends on a rule, a contract or your own circumstances, check that evidence before acting.

Put the question into numbers →

About this guide

Prepared for SiP Money’s educational publication. Source dates above refer to the original factual check; native reading edition and worked exercise updated 18 October 2026. No named professional review is claimed. Examples are hypothetical, exclude unstated taxes and costs and do not assess personal suitability.

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