SIP calculator with inflation, tax and step-up
What will my SIP be worth, really?
₹12 L invested, ₹11.23 L of gains
Invested, value and the range of outcomes
Shaded band: the middle 80% of 100 simulated market paths.
How this is calculated
Rules checked against their sources on 29 September 2026. Tax year FY2026-27.
What a SIP calculator usually hides
A systematic investment plan is simply a fixed amount invested every month. The arithmetic is not the hard part: at 12% a year, ₹10,000 a month becomes about ₹23 lakh in ten years, of which ₹12 lakh is what you put in. What the popular calculators leave out is what that ₹23 lakh will buy and what you keep after tax.
Inflation. Ten years of 6% inflation shrinks ₹23 lakh to about ₹13 lakh in today's money. That is still more than the ₹12 lakh invested, but far from double. A retirement or education goal is set in today's rupees, so the value in today's rupees is the one to compare it against.
Tax. Equity-fund gains held over a year are taxed at 12.5% above an annual exemption of ₹1.25 lakh; units bought in the final twelve months are short-term and taxed at 20%. Debt-fund units bought after April 2023 are taxed at your slab, like a fixed deposit. This calculator works out each instalment's holding period separately and shows the tax as if you redeemed everything at the end.
Variance. Twelve percent is an average, not a promise. Indian equity has delivered that over long stretches with individual years anywhere from −50% to +75%. The band on this page runs 100 simulated market sequences with the same average and the volatility the retirement planner uses, so you see the one-in-ten bad outcome next to the one-in-ten good one.
Step-up: the lever that matters most
Raising the instalment as your income rises does more than a higher return. ₹10,000 a month stepped up 10% a year for 15 years puts in ₹38 lakh and grows to about ₹78 lakh at 12%, against ₹50 lakh for the flat SIP. Most fund platforms let you set a step-up once; the calculator shows the instalment in the final year so you can check it stays realistic.
Equity or debt
Use the equity setting for index, flexi-cap and other equity funds with a horizon of seven years or more, and the debt setting (with your slab) for shorter goals. This page does not compare funds or recommend any; it shows what each type of return, after tax and inflation, would mean for your goal.
How this fits a retirement plan
A SIP is one contribution line into one account. A full plan puts it next to your EPF, the step-up in your salary, the goals along the way and the tax you will pay in retirement, and tells you whether the total is enough. The retirement calculator on this site does that for five numbers; a saved plan does it for everything.
Questions people ask
- Is the return applied monthly or yearly?
- Monthly, at the yearly rate divided by twelve, with the instalment invested at the start of the month. That is the convention on every large Indian platform, so the nominal value here matches theirs. A fund's reported CAGR compounds yearly, which would give a slightly lower figure.
- Why is the value in today's money so much lower?
- Because prices rise. At 6% inflation a rupee ten years from now buys what 56 paise buy today. A goal such as college fees is a today's-money number, so the inflation-adjusted value is the honest comparison.
- How is the tax worked out?
- Each month's instalment is held for a different length of time. For equity funds, units held over twelve months are long-term: gains above ₹1.25 lakh in the year are taxed at 12.5%; the last year's units are short-term at 20%. Debt-fund gains on units bought after April 2023 are taxed at your slab. Cess of 4% is added. Redeeming over several years would use the exemption more than once.
- What is the band?
- One hundred simulated market paths with the same expected return but realistic year-to-year swings. The low end is the value one in ten paths fails to reach; the high end is what one in ten exceeds. It is a reminder that the average is not a floor, not a forecast of either extreme.
- Should I choose a higher return to see a bigger number?
- You can, but the number is only as good as the assumption. Long-run Indian equity returns after costs have been in the 11% to 13% range; the retirement planner on this site uses a more cautious figure with a haircut. A plan built on 15% that delivers 11% leaves a large gap late, when there is no time to fix it.
Want the whole picture?
A free Eazyretire plan puts this number next to your income, savings and spending and tells you whether your money lasts to the age you plan for, and what to change if it will not.