Step-up SIPs and what ₹100 a day becomes

A ₹100-a-day SIP is a brilliant start and a poor finish. Your income will rise, and if the SIP does not rise with it, you are quietly investing a smaller and smaller share of what you earn. A step-up SIP fixes that once, so you never have to remember.

What a step-up SIP is

A step-up SIP (some apps call it a top-up SIP) is a SIP with an automatic raise. You choose the increase, as a percentage or a fixed rupee amount, and the interval, usually once a year. The app then raises the instalment on schedule, and your mandate limit is set high enough to cover the future amounts.

• A 10% annual step-up on ₹3,000 a month becomes ₹3,300 in year 2, ₹3,630 in year 3, and so on.
• You can also step up a daily SIP: ₹100 a day becomes ₹110, then ₹121, which still feels like nothing.
• You can change or remove the step-up at any time. It is a convenience, not a commitment.

The idea is simple: match the SIP to your salary growth, so that investing stays the same share of your income rather than the same rupee figure.

What the step-up does to the final number

Here is ₹3,000 a month for 20 years, flat, against the same SIP with a 10% annual step-up. Both at an assumed 12% a year, for illustration only.

The step-up roughly doubles the result. Note where the extra came from: the investor put in far more over the years, and that larger money then compounded. A step-up is not free money. It is a way of making sure you actually invest more as you earn more, instead of letting the surplus drift into spending.

A 10% step-up roughly tracks a typical salary increment. If your raises are smaller, choose 5%. If you get a big jump, raise it manually that year.

What ₹100 a day becomes

People ask this constantly, so here it is, flat, with no step-up, at two assumed rates. These are illustrations. Equity returns vary year to year and can be negative for stretches; a long-run figure is an average, not a schedule.

Look at the thirty-year row. The money invested is ₹10.80 lakh. Everything above that is compounding, and most of it arrived in the last ten years. That is why starting early matters more than starting big, and why a step-up on top of this would push the final figure well beyond a crore in the illustration.

Setting it up sensibly

1. Start with an amount you will not miss, even if it is ₹100 a day.
2. Switch on a step-up of 5% to 10% a year from day one, so the first raise is automatic.
3. When your salary jumps, raise the base instalment the same week, before the new money finds other uses.
4. Review once a year. Check that the mandate limit still covers the stepped-up amount.