SIP Calculator

What this calculator does

This SIP calculator projects how a regular monthly investment can grow over time when returns compound and contributions continue consistently. It is especially useful for long-term accumulation planning, retirement investing, and goal-based investing.

The power of a SIP is usually not the first few months of growth. It is the discipline of recurring contributions combined with a long compounding runway. That makes time horizon and contribution increases just as important as the assumed return.

If you expect to raise your SIP amount every year, the step-up option helps you model a more realistic progression rather than assuming your contribution stays flat forever.

This page is built for users who need a defensible planning answer, not just quick arithmetic. It translates "Monthly SIP amount", "Expected annual return", and "Investment horizon" into "Projected value", "Invested capital", and "Estimated gain" so the trade-off is visible in one place instead of being hidden behind a single number.

How to use the sip calculator

1. Enter your monthly SIP amount, expected annual return, and investment horizon.
2. Add an initial lump sum or annual step-up percentage in Advanced options if those apply to your plan.
3. Compare invested capital and projected value to understand how much of the final number comes from market growth.
4. Start with "Monthly SIP amount", "Expected annual return", and "Investment horizon", then check whether the first output cards already answer your question. After that, add advanced assumptions such as "Starting lump sum" and "Annual SIP step-up" only when they are real enough to change the decision.

Formula and methodology

The calculator simulates the investment monthly using an effective monthly growth rate derived from the annual return assumption.

If a step-up is entered, the monthly SIP amount increases once per year after each completed 12-month block.

This is a planning estimate. Actual market returns are volatile and will not arrive in a straight line.

The model maps "Monthly SIP amount", "Expected annual return", and "Investment horizon" into "Projected value", "Invested capital", and "Estimated gain" using the formulas shown on the page. Keeping those relationships visible makes it easier to separate the core economics from the optional adjustments and to understand which assumption is actually moving the answer.

Worked example and practical context

A 1,000 monthly SIP over 15 years can build meaningful wealth, but the outcome changes quickly when the horizon is extended to 20 or 25 years.

Adding an annual step-up can be more impactful than chasing a slightly higher return assumption because it increases the capital base contributing to future growth.

How to interpret the results

Projected value is the estimated ending portfolio size. Invested capital is the amount you put in directly. Estimated gain is the difference created by market growth.

The value multiple helps you compare scenarios quickly, especially when testing different horizons or step-up rates.

Read "Projected value" first, then use the other summary cards, the chart, and the detailed table to judge contributions, growth, and future purchasing power. In most finance decisions, the best option is the one that stays strong across the full picture, not just the one with the most attractive first number.

Common mistakes to avoid

• Assuming the expected return will arrive evenly every year in live markets.
• Ignoring the role of time horizon and focusing only on monthly contribution size.
• Using an aggressive return assumption to force-fit a target value.

Key terms

SIP

A disciplined plan of investing a fixed amount regularly, usually each month.

Step-up

A periodic increase in the contribution amount, often used to match rising income over time.