Most people start a SIP and never change the amount. But incomes rise, often by 8 to 12% a year. A step-up SIP (also called a top-up SIP) raises your monthly investment by a fixed percentage every year, so your savings grow with your salary. The effect over long periods is far bigger than most people expect.
The numbers: ₹10,000 a month for 20 years
Assuming a 12% annual return, compounded monthly:
| SIP type | Total invested | Value after 20 years |
|---|---|---|
| Flat ₹10,000 a month | ₹24.0 lakh | ₹1.00 crore |
| Step-up 5% a year | ₹39.7 lakh | ₹1.37 crore |
| Step-up 10% a year | ₹68.7 lakh | ₹1.99 crore |
A 10% step-up roughly doubles the final corpus. To build the same ₹1.99 crore with a flat SIP, you would need to invest about ₹19,900 a month from day one, nearly twice the starting amount.
Over longer periods, the gap widens
| Period | Flat ₹10,000 | 10% step-up |
|---|---|---|
| 15 years | ₹50.5 lakh | ₹86.8 lakh |
| 20 years | ₹1.00 crore | ₹1.99 crore |
| 25 years | ₹1.90 crore | ₹4.28 crore |
Be honest about what this involves
- You invest much more. Part of the bigger corpus is simply the bigger total you put in: ₹68.7 lakh instead of ₹24 lakh. A 10% step-up takes the monthly SIP from ₹10,000 in year 1 to about ₹61,000 in year 20.
- Returns are not guaranteed. The 12% figure is an assumption for illustration. At 10%, the same 20-year step-up SIP grows to about ₹1.62 crore and the flat SIP to about ₹77 lakh. Real returns will vary year to year.
- Inflation still matters. ₹2 crore twenty years from now will buy far less than ₹2 crore today. Plan your goal in future rupees.
- Pick a step-up you can sustain. If your income doesn’t rise every year, choose 5% or step up by a fixed rupee amount instead.
How to set it up
- Most fund houses and investment platforms offer a “top-up” or “step-up” option when you register a SIP. Choose a percentage or a fixed amount and how often it applies.
- For an existing SIP without the option, set a yearly reminder after your increment and raise it manually, or start a second SIP for the increase.
- Check that your bank mandate limit is high enough for future step-ups, or the SIP may fail.
- Link the SIP to a goal, such as retirement or a child’s education, and review the fund choice once a year.
A simple rule: every time your salary goes up, let your SIP go up first. You won’t miss money you never got used to spending.
Disclaimer: All figures are hypothetical illustrations at assumed rates of return, before tax and expenses. They are not a forecast or a promise of future performance; actual returns may be higher or lower, and may be negative. Mutual fund investments are subject to market risks; read all scheme-related documents carefully. This is general education, not investment advice. Consult a SEBI-registered investment adviser before investing. Mungekar Wealth accepts no liability for any loss arising from reliance on this article.
