We have all heard the familiar mantra: “SIPs are safe. Just stay invested.”

But what if I told you that even a disciplined SIP investor could end up earning lower returns than a bank FD over a 3-year period?

That is the uncomfortable reality many investors do not fully understand when they begin investing in equities.

The SIP itself is not the magic. The magic is created by the holding period.

And this is exactly where most investors struggle.

I often get enquiries from customers, especially during market corrections, asking whether they should continue their SIPs. Many genuinely worry whether they could lose a significant part of their invested amount.

To be fair, when markets remain volatile for months and portfolio values keep fluctuating, these fears feel completely real.

But the bigger question investors should ask is not whether SIPs work.

The real question is:
How long should an SIP run for it to work effectively?

A 20-Year Rolling Return Analysis

To understand this better, let us look at a comprehensive 20-year rolling return analysis across Nifty 100, Nifty Midcap 150, and Nifty Smallcap 250.

The findings reveal a pattern that every investor should understand before starting an SIP.

Let us first look at different 3-year SIP return periods and compare them with a fixed deposit benchmark of ~7% per annum for the period 2009–2026.

• Analysis on large-caps (Nifty 100) shows that SIP returns fell below FD interest rates 17% of the time. Remember, large caps are generally considered the safer bet within equities.
• For medium-sized companies represented by the Nifty Midcap 150, the data shows that SIP returns fell below FD interest rates 24% of the time.
• Considered as the aggressive segment, the Nifty Smallcap 250 data shows that SIP returns fell below FD rates 29% of the time.

Pause and think about that for a moment.

If you ran a 3-year SIP in a small-cap fund, 1 in 3 investors, depending on when they started, would have been better off with a simple bank FD.

That is not bad luck. That is structural risk embedded in short holding periods.

And many investors do not understand investing in equities. They assume SIPs automatically reduce all risk. In reality, SIPs reduce timing risk. They do not eliminate volatility.

The Volatility Nobody Understands Enough

Now let us look at the volatility data.

The 20-year analysis period (2009 to 2026), which includes events like the 2008 Global Financial Crisis and the 2020 pandemic shock, shows just how unpredictable shorter-term SIP outcomes can be.

For 3-year SIPs, the return range (minimum to maximum XIRR) tells a powerful story.

• Nifty 100 returns ranged from a low of -22.7% to a high of 29.5%. That is a spread of approximately 52 percentage points.
• For Nifty Midcap 150, as expected, the spread widened significantly. Returns ranged from -33.6% to +40.8%, taking the unpredictability to nearly 74 percentage points.
• Nifty Smallcap 250 was even more aggressive. Returns swung from a low of -37.8% to a high of 46%, creating a spread of almost 84 percentage points.

The risk spectrum clearly widens as you move lower down the market-cap curve.

And that leads to an important insight:

Volatility is not just about temporary highs and lows.
It is about the wide range of possible outcomes investors must emotionally survive.

Imagine starting a small-cap SIP during a euphoric market phase expecting quick wealth creation, only to see disappointing returns for the next three years despite investing consistently.

Most investors do not exit because SIPs mathematically failed. They exit because emotionally, the journey became harder than expected.

What This Means for You as an Investor

As a capital markets professional, I have seen investors repeatedly make the same mistake. They treat equity SIPs like fixed deposits and expect predictable returns over short periods.

Equity has never worked that way. And it probably never will.

Here is a simple framework I personally use while thinking about SIP allocation:

• 3-year horizon? Stick to debt instruments like FD or Debt Mutual Funds. Avoid equities entirely.
• 3-to-5-year horizon? You can cautiously participate in equities through selected Hybrid funds.
• Above 5-to-6 years horizon? This is where the real potential of equity mutual funds lies. This is where meaningful wealth creation happens by allocating a suitable combination to large, mid, and small caps. But only if you are mentally prepared to go through volatility and phases of prolonged underperformance.

For all practical purposes, a disciplined 10-year SIP investor across any of these indices has historically earned very good returns.

The data reveals one uncomfortable truth that Equity SIP success depends far more on holding period than just the fund category.

And when the data itself shows this so clearly, does it really make sense to use pure equity funds for short-term goals?

Think carefully, because the probability of disappointment becomes quite high.

The Behaviour Gap

The AMFI Annual Report 2025 highlights an interesting paradox.

Investor behaviour is improving, yet about 81% of direct SIP assets and 67% of regular SIP assets are still held for less than 5 years.

This reflects something important.

Investors intellectually understand long-term investing but emotionally exit at the worst possible time (during corrections), when the market is actually working in their favour.

Ironically, the phase where SIPs feel the most uncomfortable is often the phase where future long-term returns quietly improve.

The corrective phase since September 2024 is a live example. Returns on 3-year SIPs have visibly declined across segments.

But for a 10 or 15-year SIP investor, this phase is simply a noise that needs to be ignored.

Also note that investors who have stayed invested for over 10 years are still seeing lower double-digit returns despite the recent correction.

The Important Lesson

SIPs are among the most powerful wealth-building tools available to investors, but only when the mutual fund schemes are matched with the right investment horizon.

If your horizon is a decade or more, the historical data strongly supports continuing your SIPs without second thoughts.

Because in investing, time in the market (not timing the market) still remains the single most durable edge available to every investor.

Source: Business Line portfolio analysis of 20-year rolling SIP returns on Nifty 100, Nifty Midcap 150, and Nifty Smallcap 250 Total Return Indices (March 2009 – February 2026).