Step-Up SIP vs Flat SIP: How Much More Do You Actually Get?

A step-up SIP means you raise your monthly amount by a fixed percentage every year — usually to keep pace with a growing income. A 10% yearly step-up sounds small. Here's what it actually does over 15 years.

Same start, different path

Both start at ₹15,000/month, same fund, same 12% expected return. One stays flat for all 15 years. The other rises by 10% every year:

The step-up path ends with ₹54.57L more in the corpus. That looks like an easy win — but it isn't free.

What the step-up actually asks of you

Growing your SIP 10% every year compounds too — by year 15, the step-up SIP has grown from ₹15,000 a month to ₹56.96K a month, close to 3.8× the amount you started with. In total you'd put in ₹30.19L more of your own money than the flat SIP — the bigger corpus is largely because you invested a lot more, not because the step-up version is a fundamentally better strategy.

A step-up SIP is worth doing when your income is realistically going to grow along with it — it turns "save more as I earn more" into something automatic. It's not a way to get a bigger result from the same money.