SIP Calculator
Estimate systematic investment plan growth, total invested capital, and long-term compounding with the WealthCalcLab SIP calculator.
Updated April 5, 2026
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.
How to use it
Enter your monthly SIP amount, expected annual return, and investment horizon.
Add an initial lump sum or annual step-up percentage in Advanced options if those apply to your plan.
Compare invested capital and projected value to understand how much of the final number comes from market growth.
Method
Monthly projection = prior value × (1 + monthly return) + SIP amountA simulation approach is used because it handles step-up contributions cleanly and produces clear year-by-year output.
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.
Worked example
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.
Common mistakes
- 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
Quick definitions for the finance terms that matter on this page.
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.
Frequently asked questions
Clear answers on assumptions, interpretation, and the limits of each estimate.
Can I use this SIP calculator without a lump sum?
Yes. The initial investment is optional and can be set to zero if you are starting only with monthly contributions.
Does the step-up happen every month?
No. In this model it happens once per year, which matches how many investors review and increase their SIP.
Is the projected value guaranteed?
No. It is an estimate based on a steady assumed annual return, while real investment performance fluctuates.
Why is the time horizon so important?
Because compounding accelerates later in the journey. Extending the timeline can have a larger impact than many people expect.
Related calculators
Continue your planning with tools that answer the next logical question.
Compound Interest Calculator
Project future value, total contributions, and compounding growth with optional monthly additions and inflation adjustment.
Retirement Calculator
Project retirement savings, estimated retirement income, and the gap between your target lifestyle and projected portfolio.
CAGR Calculator
Calculate compounded annual growth rate between a starting value and an ending value over time.
ROI Calculator
Measure return on investment, net profit, and annualized performance from a starting cost and ending value.
Important disclaimer
Calculator outputs are estimates only and should not be treated as financial, tax, legal, or investment advice.