What a step-up does to your SIP
A step-up SIP, also called a top-up SIP, increases the installment at a set interval, usually once a year, by a percentage or a fixed amount. This calculator uses a yearly percentage: with a 10% step-up, ₹10,000 a month becomes ₹11,000 in the second year, ₹12,100 in the third, and so on.
| ₹10,000 a month at 12% | 10 years | 15 years | 20 years | 25 years |
|---|---|---|---|---|
| No step-up | ₹22.4 lakh | ₹47.59 lakh | ₹91.99 lakh | ₹1.7 crore |
| 5% a year | ₹26.94 lakh | ₹61.91 lakh | ₹1.28 crore | ₹2.48 crore |
| 10% a year | ₹32.69 lakh | ₹82.75 lakh | ₹1.86 crore | ₹3.94 crore |
| 15% a year | ₹39.99 lakh | ₹1.13 crore | ₹2.86 crore | ₹6.77 crore |
Over 20 years a 10% step-up roughly doubles the result. Over longer periods the gap widens further, because the installment keeps rising: by year 25 a 10% step-up has taken ₹10,000 to about ₹98,500 a month.
You invest more, so compare fairly
| 20 years at 12% | You invest | It grows to | Gain | Last monthly installment |
|---|---|---|---|---|
| No step-up | ₹24 lakh | ₹91.99 lakh | ₹67.99 lakh | ₹10,000 |
| 10% step-up | ₹68.73 lakh | ₹1.86 crore | ₹1.18 crore | ₹61,159 |
Part of the bigger result is simply the extra money you put in. The point of a step-up is that the extra comes from future pay rises, if you get them, rather than from today's budget. If your income doesn't grow, a step-up you can't keep up with is worse than a steady SIP.
Starting SIP for a goal
To reach ₹1 crore in 20 years at 12% a year, you need about ₹10,872 a month with no step-up, or a starting SIP of about ₹5,368 a month with a 10% yearly step-up. Choose SIP for a goal in the calculator to try your own target.
How the calculator works
Each installment goes in at the start of its month and grows at the monthly equivalent of your yearly return. The installment rises by the step-up percentage after every 12 installments. The return is an assumption: real funds go up and down, so read the result as one possible outcome, not a promise. The main SIP calculator explains the formula, choosing a return and inflation in detail.
Setting up a step-up with your fund house
Many fund houses and investment apps offer a top-up, usually a fixed amount or a percentage at half-yearly or yearly intervals. Some allow it only when you register the SIP, and some set a minimum such as 10%, so check the options first. If yours doesn't offer it, you can start a second SIP each year for the increase.