How to use this SIP calculator
- Choose SIP, Lump sum, Goal or ELSS 80C at the top of the form.
- Enter the monthly amount, the number of years and the return you expect. Tap a return preset if you want a starting point.
- Add a yearly step-up if you plan to raise your SIP as your income grows, and an inflation rate to see what the money will be worth in today's terms.
- Read the maturity value, the tax estimate and the inflation-adjusted value, then check the chart, the milestones and the year-by-year table.
- Use "Copy a link to these numbers" to save or share the exact inputs.
How SIP maturity is worked out
Each instalment is added at the start of the month and the balance then earns one-twelfth of the yearly return. Take ₹10,000 a month at 12% a year for 10 years. You put in ₹12,00,000 over 120 instalments, and the calculator shows a maturity value of ₹23,23,391, so the returns are ₹11,23,391. The same result comes from the standard formula: maturity = instalment x [((1 + i)^n - 1) / i] x (1 + i), where i is the monthly rate (1%) and n is the number of months (120).
What a yearly step-up does
Raising the SIP by 10% every year turns a ₹10,000 SIP into ₹11,000 in year two, ₹12,100 in year three and so on. On the same 12% return over 10 years that grows to ₹33,74,326 from ₹19,12,491 invested, compared with ₹23,23,391 from ₹12,00,000 for the flat SIP. The extra corpus comes mostly from the larger instalments made in the later, higher-earning years, which is why a step-up is worth matching to your expected pay rises.
Planning for a goal
The Goal tab works backwards. To reach ₹1 crore in 15 years at 12% with no step-up you would need to invest about ₹19,819 a month. If the goal is priced in today's money, switch on "Target is in today's money" and the calculator first raises it by your inflation rate, because a ₹1 crore goal today costs far more in 15 years.
SIP versus lump sum
A one-time ₹5,00,000 investment at 12% for 10 years grows to ₹15,52,924 in this calculator. Investing ₹10,000 a month for the same 10 years puts in ₹12,00,000 in total and reaches ₹23,23,391. The two are not directly comparable, because the SIP contributes far more money over time. Use the Lump sum tab when you have a fixed amount to invest and the SIP tab when you are investing from monthly income.
ELSS and Section 80C
ELSS funds count towards the ₹1.5 lakh yearly limit under Section 80C, but only if you use the old tax regime. A SIP of ₹12,500 a month, or ₹1,50,000 a year, saves ₹46,800 of tax a year for someone in the 30% slab, including 4% cess. Each instalment is locked in for 3 years. Whether the old regime is better for you depends on your other deductions, so compare both in the income tax calculator before choosing.
Tax on mutual fund gains
For the 10-year ₹10,000 SIP above, the gains are ₹11,23,391. With the ₹1.25 lakh exemption and a 12.5% rate plus 4% cess, the estimated tax is about ₹1,29,791. In practice each monthly instalment has its own holding period, and you can spread redemptions across years to use the exemption more than once, so the real figure depends on how and when you sell. The tax settings on this page are editable for that reason, and the rules for equity funds, debt funds and other categories differ and change over time.
What this calculator does not do
It assumes a constant return, so it cannot show the ups and downs of a real fund. It ignores fund expenses beyond whatever is already in your return assumption, exit loads and stamp duty. It treats every instalment as long term for tax purposes. The inflation rate is also constant. Treat the result as a planning estimate, not a forecast or advice. Related tools: EMI calculator, PPF calculator and FD and RD calculator.
