A step up SIP Calculator can reveal an important feature of long term investing: the starting contribution can matter as much as the rate at which the contribution increases.
In this comparison, both SIP plans continue for 20 years and assume an annual return of 12%, but they begin with different monthly amounts and use different annual step up rates.
In the first scenario, the monthly SIP begins at ₹15,000 and rises by 5% every year. The investment continues for 20 years and the expected annual return is assumed at 12%.
Starting monthly SIP: ₹15,000
Investment period: 20 years
Annual step up: 5%
Assumed annual return: 12%
Total invested amount: ₹59,52,024
Estimated returns: ₹1,46,54,881
Estimated final value: ₹2,06,06,905
Although the annual increase is limited to 5%, this scenario begins with a comparatively larger monthly contribution. A greater amount is therefore invested during the early phase, giving those contributions more time to compound across the 20 year period.
In the second scenario, the monthly SIP begins at ₹10,000 and increases by 10% every year. The investment period and assumed annual return remain unchanged.
Starting monthly SIP: ₹10,000
Investment period: 20 years
Annual step up: 10%
Assumed annual return: 12%
Total invested amount: ₹68,73,432
Estimated returns: ₹1,30,16,104
Estimated final value: ₹1,98,89,536
The faster annual increase eventually takes the monthly contribution above the amount invested under the first scenario. As a result, the total invested amount is higher. However, a considerable part of this larger contribution enters during the later years, leaving less time for compounding.
Based on the figures provided by the Step Up SIP Calculator, Scenario 1 creates the higher estimated final value.
The ₹15,000 SIP with a 5% annual step up reaches an estimated value of ₹2,06,06,905. The ₹10,000 SIP with a 10% annual step up reaches an estimated value of ₹1,98,89,536.
The difference in the final value is ₹7,17,369 in favour of Scenario 1.
This result may initially appear surprising because Scenario 2 has a higher step up rate and a higher total invested amount. Over 20 years, Scenario 2 contributes ₹68,73,432, which is ₹9,21,408 more than Scenario 1. Yet its estimated final value remains lower.
The reason lies mainly in the timing of the contributions.
Read More: Step Up Calculator: How A ₹25,000 SIP Can Build A ₹10 Crore Corpus In 30 Years?
Scenario 1 places more money into the investment during the initial years. Each of those early contributions gets a longer period to earn returns and potentially generate further returns on the accumulated growth.
For example, an amount invested in the first year can remain invested for nearly the entire 20 year period. An additional amount contributed in the eighteenth or nineteenth year has only a limited period to grow before the calculation ends.
Scenario 2 increases the SIP more aggressively, but it starts ₹5,000 lower each month. The 10% annual step up helps close the contribution gap and eventually results in a larger total investment. However, many of those larger contributions occur later in the investment period.
This highlights the difference between contribution size and contribution timing. A larger total investment does not automatically produce a larger final value when a significant portion of that money is invested at a later stage.
The estimated returns further illustrate the impact of timing.
Scenario 1 generates estimated returns of ₹1,46,54,881, while Scenario 2 generates estimated returns of ₹1,30,16,104. The difference in estimated returns is ₹16,38,777.
Scenario 1 therefore produces higher estimated gains even though its total invested amount is lower. The early contribution advantage allows more of the portfolio to remain exposed to the assumed 12% return for a longer period.
Compounding becomes increasingly significant over long durations because growth can accumulate on both the original contributions and the returns generated in previous periods. The effect is not linear. Additional time can make a substantial difference to the eventual value.
The second scenario begins with a lower SIP, but its contribution rises at twice the annual rate of the first scenario.
A 10% annual increase causes the monthly SIP to grow more rapidly during the later years. This explains why Scenario 2 contributes ₹68,73,432 over 20 years, compared with ₹59,52,024 in Scenario 1.
However, the higher total contribution is concentrated more heavily towards the later part of the period. Those later investments still add to the final value, but their growth period is shorter.
The comparison therefore demonstrates that the annual step up percentage should not be viewed separately from the starting SIP amount. Both variables work together, and the investment duration determines how much time each contribution receives.
Under the step up SIP Calculator assumptions, Scenario 1 produces the higher estimated value after 20 years. The ₹15,000 SIP with a 5% annual step up reaches ₹2,06,06,905, compared with ₹1,98,89,536 for the ₹10,000 SIP with a 10% annual step up.
The comparison illustrates how an early contribution advantage can outweigh a faster increase in contributions. Scenario 2 invests more overall, but Scenario 1 earns higher estimated returns because a larger amount remains invested for a longer duration.
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Disclaimer: This blog has been written exclusively for educational purposes. The securities or companies mentioned are only examples and not recommendations. This does not constitute a personal recommendation or investment advice. It does not aim to influence any individual or entity to make investment decisions. Recipients should conduct their own research and assessments to form an independent opinion about investment decisions.
Mutual Fund investments are subject to market risks, read all scheme-related documents carefully.
Published on: Jul 25, 2026, 4:39 PM IST
Team Angel One
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