Step-Up SIP Calculator. Raise your SIP, grow your corpus.

A step-up SIP, also called a top-up SIP, raises your monthly contribution by a fixed percentage every year instead of holding it flat for the entire tenure. The logic mirrors real life: your salary rises over time, so your investing should keep pace rather than staying frozen at whatever you could afford on day one. A flat SIP quietly shrinks as a share of your income and loses ground to inflation. Stepping the amount up each year keeps your saving rate roughly constant against your take-home pay, and because more money goes in during the early and middle years, the final corpus ends up materially larger than a flat plan that started at the same figure.

Two engines work together in a step-up SIP. First, each instalment earns compound returns for however many months remain until maturity, exactly like an ordinary SIP. Second, the contribution itself grows geometrically: a 10% annual step-up multiplies your monthly amount by 1.10 every year, so ₹10,000 becomes ₹11,000, then ₹12,100, and so on. The powerful part is that the raises you make in the early years get the longest runway to compound. That is why the gap between a step-up and a flat SIP widens faster than the extra rupees you contribute, because the early increases spend the most time in the market working for you.

For most salaried investors, 5% to 10% a year is the realistic band, because it roughly tracks typical annual salary hikes and inflation. Set the step-up close to your expected raise and each year’s higher SIP stays about the same slice of your take-home pay, so it never feels like a squeeze. A 10% step-up suits steady corporate increments; 5% is safer if your income growth is modest or uneven. Very high step-ups like 15% or 20% build bigger corpuses on paper, but only if you can genuinely sustain the rising outflow for the full tenure. Pick a rate you can commit to and actually keep, since a step-up only works if you follow through.

Both work; they suit different people. A fixed percentage step-up (say 10% a year) scales with your growing base, so the rupee increase gets larger over time and the SIP keeps pace with a compounding salary. A fixed rupee step-up (for example ₹1,000 more each year) is simpler to picture and budget, but as a share of a rising income it shrinks, so its effect fades in later years. Percentage step-ups generally build a larger corpus over long horizons because the increases themselves compound. If you value predictability, a fixed rupee top-up is fine; if you are optimising the final number, the percentage approach usually wins. This calculator uses a fixed annual percentage.

Step-up SIPs shine on long-horizon goals like retirement, a child’s higher education, or a home down payment, where there is enough time for the early raises to compound hard. Over 20 to 30 years, a modest annual step-up can lift the final corpus well beyond a flat SIP without ever demanding an unaffordable amount in any single year, because the increases arrive alongside your rising income. For short goals of three to five years, the benefit is smaller and market risk matters more, so favour lower-volatility funds. Whatever the horizon, pre-commit the step-up so it happens automatically, and remember that mutual fund returns are not guaranteed and can vary year to year.