How to use the SIP calculator
- Enter the monthly investment.
- Enter the expected return per year and the period in years.
- Optionally enter a yearly step-up. Leave it at 0 for a flat SIP.
- Choose a currency. Rupees are grouped in lakhs and crores.
- Read the expected value, amount invested and estimated returns, then the year-by-year table. Download CSV saves it.
The formula
For a flat SIP: FV = P × ((1 + i)^n − 1) ÷ i × (1 + i)
- P is the monthly amount, i is the annual return ÷ 12 ÷ 100 and n is the number of months.
- The final × (1 + i) assumes each instalment is invested at the start of the month, the common way Indian SIP calculators work.
With a step-up, the tool runs the months one at a time. The instalment is P in year one, P × (1 + s) in year two, and so on, where s is the step-up percentage.
Worked example
5,000 a month for 10 years at an expected 12% a year.
- i = 12 ÷ 12 ÷ 100 = 0.01 and n = 120.
- (1.01)^120 = 3.3004, so the growth factor is (3.3004 − 1) ÷ 0.01 × 1.01 = 232.34.
- FV = 5,000 × 232.34 = 11,61,695.
- Invested: 6,00,000. Estimated returns: 5,61,695, a multiple of 1.94 times.
Now add a 10% step-up. You invest 9,56,245 in total and the estimate rises to about 16,87,163. Raising your SIP a little each year, as pay rises, makes a bigger difference than most people expect.
Things to keep in mind
- Real returns bounce around. A fund averaging 12% may have a few bad years in a row.
- Longer periods matter most. The same SIP over 20 years grows to roughly 50 lakh at 12%.
- Inflation reduces what the final amount can buy.
- This is an estimate only, not financial advice.
Related tools
If your savings are a lump sum, try the compound interest calculator. Borrowing instead? The EMI calculator shows the monthly cost. For quick ratios, use the percentage calculator. Your numbers never leave your browser.