SIP or Systematic Investment Plan is one of the most popular ways to invest in mutual funds in India. Instead of investing a large lump sum, SIP lets you invest a fixed amount every month - as little as ₹500. Over time, thanks to the power of compounding and rupee cost averaging, even small monthly investments can grow into significant wealth. But how exactly are SIP returns calculated? And how do you know how much your investment will be worth at the end?
What is SIP and How Does It Work?
In a SIP, you invest a fixed amount every month into a mutual fund scheme. The fund buys units at the current NAV (Net Asset Value) on your investment date. When markets are high you get fewer units, when markets are low you get more units. Over time this averages out your purchase cost - a concept called rupee cost averaging. Combined with compounding, this makes SIP one of the most reliable wealth-building strategies for retail investors.
The SIP Returns Formula
SIP returns are calculated using the future value of an annuity formula: M = P × ({[1 + r]^n – 1} / r) × (1 + r). Where M is the maturity value, P is the monthly investment amount, r is the monthly interest rate (annual rate divided by 12 divided by 100), and n is the total number of months. This formula assumes a constant rate of return which is used for estimation purposes.
Example SIP Calculation
Let's say you invest ₹5,000 per month for 10 years at an expected return of 12% per annum. Using the formula: Monthly rate r = 12/12/100 = 0.01. Number of months n = 10 × 12 = 120. Maturity value M = 5000 × ({[1.01]^120 – 1} / 0.01) × 1.01 = approximately ₹11,61,695. Your total investment over 10 years = ₹5,000 × 120 = ₹6,00,000. Your estimated returns = ₹11,61,695 − ₹6,00,000 = ₹5,61,695. This means compounding nearly doubled your investment.
The longer you stay invested in a SIP, the more powerful compounding becomes. Starting 5 years earlier can make a difference of lakhs in your final corpus.
Factors That Affect Your SIP Returns
- Monthly investment amount - more invested means more compounding base
- Expected rate of return - equity mutual funds historically return 10–14% annually over long periods
- Investment tenure - longer tenure dramatically increases final corpus due to compounding
- Compounding frequency - most SIP calculators assume monthly compounding
- Step-up percentage - increasing your SIP amount annually accelerates growth significantly
How to Use EveryTool's SIP Calculator
- Open the SIP Calculator on EveryTool
- Enter your monthly investment amount in ₹
- Set your expected annual return rate (use 10–12% for equity funds as a conservative estimate)
- Set your investment tenure in years
- Your maturity amount, total invested, and estimated returns appear instantly
- View the year-by-year breakdown to see how your corpus grows over time
SIP calculator results are estimates based on a constant assumed rate of return. Actual mutual fund returns vary based on market conditions and are not guaranteed.