Monday, August 19 2026
Source/Contribution by : NJ Publications

Pull out your SIP mandate from ten years ago and your salary slip from this month, and lay them side by side. One of those numbers has grown quietly, year after year. The other hasn't moved at all.

Take a professional who started a SIP of Rs. 20,000 a decade ago, on a monthly salary of about Rs. 1,00,000. A fifth of the paycheck, going out automatically every month - a genuine commitment at the time. Salaries in most careers climb somewhere around 10% a year, between increments and the occasional job change, and ten years of that compounding takes the same salary to roughly Rs. 2,50,000. The SIP, meanwhile, still reads Rs. 20,000.

A SIP That Stopped Keeping Up

Nobody sat down and decided to invest less. The bank instruction from ten years ago simply never got revisited, while the number it was once a fifth of kept climbing on its own. Do the arithmetic and the SIP has quietly slipped from 20% of income to around 8%. Had it grown at the same pace as the salary, it would be closer to Rs. 50,000 a month today - not Rs. 20,000.

It isn't only investors who never touch their SIP who fall behind, either. Plenty do revisit it every few years and bump it up - Rs. 20,000 becomes Rs. 25,000, say, and it feels like a real step up. But measured against what the income has actually grown by, a jump of a few thousand rupees is still nowhere close to the Rs.50,000 the numbers call for. The increase happened; it just wasn't sized to the actual growth behind it.

A financial need doesn't really care how the SIP was originally sized. A child's education or a retirement corpus has a cost and a rough date attached to it, set mostly independent of whatever felt reasonable in year one. If the SIP isn't moving while income is, the shortfall between the two builds up steadily, without any single decision along the way that felt like a compromise.

What a Top-Up Actually Does

A SIP Top-Up closes exactly that gap - increasing the instalment by a fixed amount or percentage at set intervals, so the plan keeps pace with what you're actually able to set aside, rather than what you could afford a decade ago.

The Numbers

On a Rs. 10,000 SIP with a Rs. 2,000 annual Top-Up, assuming the 12.62% long-term average AMFI's own guidelines use for equity funds:

Assuming an average return of 12.62% p.a. as per AMFI Best Practice Guidelines Circular No. 109-A/2024-25, dated September 10, 2024. Past performance may or may not be sustained in future and is not a guarantee of future returns.

Two things follow from that, in practice. Financial needs get met sooner, since more of a rising income is actually reaching them each year instead of the fixed sum agreed to long before. And the corpus ends up larger, since each additional instalment gets whatever runway is left to compound. None of it needs a fresh decision each year - the increase sits inside the plan the same way the original SIP did.

Advantages of a SIP Top-Up

• Reach financial needs sooner - a rising instalment shortens the time it takes to hit a fixed target, so the same corpus arrives years earlier than it would on a flat SIP.

• Build a higher corpus - over an identical tenure, the extra instalments plus compounding add up to a meaningfully larger final corpus.

• Stay systematic - the increase is scheduled and automatic, the same disciplined way the original SIP was set up, with no fresh decision required each year.

• Keep pace with rising income - savings grow proportionately as earnings grow, instead of quietly shrinking as a share of what's being earned.

Where This Leaves You

If your income has grown since you started a SIP - and for most people, it has - a fairly simple question follows: has your investment grown with it? Where it hasn't, that's rarely because of anything done wrong, just a plan set once and left alone a little too long. A small increase, added regularly, tends to be enough to close the gap.

Mutual fund investments are subject to market risk. Please read all scheme-related documents carefully before investing. Past performance may or may not be sustained in future and is not a guarantee of future returns. This article is for investor education purposes only and does not constitute investment advice. Please consult your mutual fund distributor before making any investment decision.