About the Step-Up SIP Calculator
A step-up SIP (also called a top-up SIP) is a monthly investment plan where the instalment increases once a year — usually by a fixed percentage such as 10%, or by a fixed amount. This step-up SIP calculator projects the maturity value of such a plan, the total you will have invested, the returns earned and how much larger the corpus is than a SIP that never increases.
It suits salaried investors who expect their income to grow and want their investing to keep pace. Raising the SIP in line with pay rises is one of the simplest ways to reach a large goal without starting with a big monthly amount, and the comparison figure shows exactly what that discipline is worth.
The calculator assumes a constant annual return compounded monthly, instalments invested at the start of each month and the increase applied at the start of each new year of the plan. Market returns are not guaranteed, so treat the result as a planning estimate.
With the default inputs, the estimated maturity value is $4,341,924.72. Change any value above to recalculate instantly.
How to use the step-up sip calculator
- 1Enter the monthly SIP you will start with.
- 2Choose whether it rises by a percentage or a fixed amount each year, and enter the increase.
- 3Enter the expected annual return and the number of years.
- 4Compare the step-up maturity value with the flat SIP value to see the benefit.
- 5Use the yearly table to see what you will need to invest each month in later years.
Formula and method
The calculator simulates the plan month by month. In year k the monthly instalment is either the starting SIP grown by the step-up percentage (k − 1) times, or the starting SIP plus the fixed increase added (k − 1) times. Each month the instalment is added at the start of the month and the whole balance grows by the monthly rate i, which is the annual return ÷ 12.
A flat SIP of the starting amount is simulated alongside it with the same return, so the difference between the two balances shows the value of stepping up. Fees, taxes and exit loads are ignored, so use a return assumption that is already net of the fund’s expense ratio.
- P
- Starting monthly SIP
- s
- Annual step-up percentage (as a decimal)
- A
- Fixed annual increase in the monthly SIP
- i
- Monthly return (annual return ÷ 12 ÷ 100)
Worked examples
5,000 a month, +10% a year, 12% for 15 years
Starting at 5,000 and raising it 10% every year, the SIP reaches about 18,987 a month in year 15. You invest about 1.91 million in total and end with roughly 4.34 million — about 1.82 million more than a flat 5,000 SIP would produce.
10,000 a month, +5% a year, 11% for 20 years
A modest 5% annual top-up lifts the monthly SIP to about 25,270 by year 20. The corpus grows to roughly 12.18 million versus 8.74 million with a flat SIP.
$300 a month plus $50 each year at 9% for 10 years
Adding $50 to the monthly amount each year takes it from $300 to $750 by year 10. Total contributions are $63,000 and the plan grows to about $95,242, compared with $58,490 for a flat $300 SIP.
Frequently asked questions
What is a step-up SIP?+
A step-up or top-up SIP is a systematic investment plan in which the monthly instalment increases automatically once a year, either by a percentage (for example 10%) or by a fixed amount. Many fund houses let you set this up when you register the SIP.
What step-up percentage should I choose?+
A common approach is to match your expected annual salary increase, often 5%–10%. Even a 5% step-up makes a large difference over 15–20 years because the larger instalments also compound.
Is step-up SIP better than a normal SIP?+
For the same starting amount it always builds a bigger corpus because you invest more money over time. The real benefit is behavioural: it lets you start small and grow your investing as your income grows.
When is the step-up applied?+
This calculator applies the increase at the start of each new plan year, so months 1–12 use the starting amount, months 13–24 the first increase, and so on. That matches how most fund houses implement annual top-ups.
Results are estimates for educational purposes and are not financial advice. Rates, fees and terms vary — confirm with your lender or a licensed advisor before making decisions.