SIP Calculator with Inflation – Mutual Fund Returns India 2026

How SIP grows over time: compounding and accurate SIP growth projection

A Systematic Investment Plan (SIP) grows because of compounding. You invest a fixed amount every month; each installment is deployed in the market and earns returns. Earlier installments stay invested longer, so they compound more. Over time, the future value is much higher than the simple sum of what you put in — that difference is your wealth gain. This calculator uses the standard future-value-of-annuity formula with a compound monthly rate — giving you an accurate, inflation-adjusted projection for long-term planning. The year-wise chart helps you see exactly how wealth builds over time.

Why inflation adjustment matters for long-term SIP planning

Inflation reduces the purchasing power of money. A large corpus in 20 years will buy less than the same amount today. This calculator shows both the nominal future value and the inflation-adjusted value — that is, what your corpus would be worth in today’s rupees. For long-term planning, the inflation-adjusted number is what you should use to judge whether you are on track. We use the formula: inflation-adjusted value = Future Value ÷ (1 + inflation)^years, so you can plug in your expected inflation (e.g. 6%) and see the real value of your wealth.

How to increase your SIP amount over time (Step-Up SIP)

A flat monthly SIP is a great start, but your income typically grows 8–15% a year — keeping your SIP fixed means you are investing a shrinking share of your salary over time. The solution is a step-up SIP (also called top-up SIP): you increase your SIP by a fixed percentage or amount each year, usually in line with your salary increment. Most platforms let you configure this in the SIP setup flow.

The compounding impact is significant. A flat ₹10,000/month SIP at 12% over 20 years grows to approximately ₹92 lakh. Adding just a 10% annual step-up roughly doubles the final corpus to around ₹2.2 crore — from the same starting SIP amount, simply by increasing the investment as income grows. To plan your allocation by age alongside your step-up strategy, see our SIP planning by age guide. Projections shown are illustrative; actual returns vary.

Using this calculator for index fund SIPs

This calculator works for any mutual fund SIP — including index funds. To project an index fund SIP, enter 10–12% CAGR (approximate Nifty 50 historical return before costs). Because index funds have lower expense ratios (0.1–0.2%) compared to active funds (0.5–1.5%), consider entering a CAGR of 0.5–1% lower than the headline index return to get a realistic net-of-cost projection. Use the inflation input to see how much of that growth is real purchasing power vs nominal. Index fund returns are not guaranteed; use these projections as a planning tool only.

Tax on SIP returns in India: what to know

This calculator shows your pre-tax corpus. Understanding the tax impact helps you plan more accurately:

• Equity SIP (held > 12 months): Long Term Capital Gains (LTCG) taxed at 10% on gains above ₹1 lakh per year.
• Equity SIP (held < 12 months): Short Term Capital Gains (STCG) taxed at 15%.
• Debt mutual fund SIP: Gains taxed at your income slab rate (indexation benefit removed from April 2023 for new debt fund investments).
• ELSS (Equity Linked Savings Scheme): 3-year lock-in; qualifies for ₹1.5L deduction under Section 80C under the old tax regime only.

For combined HRA, 80C, and SIP tax planning, see our HRA & salary savings calculator. Consult a SEBI-registered advisor or CA before making investment or tax decisions.

Use cases: beginners and salaried professionals

For beginners: Start with ₹2,000–₹5,000/month, choose 10–15 years and 10–12% expected return. The chart shows how regular investing compounds into a meaningful corpus. Increase your SIP amount as your income grows — even small annual step-ups significantly impact the final corpus.

For salaried professionals: Use ₹25,000–₹50,000+/month with a 15–20 year horizon at 12% CAGR to project retirement wealth. Align your SIP with ELSS (for 80C tax saving under Old Regime) or index funds, and use the inflation-adjusted value to judge if your corpus will sustain your lifestyle post-retirement.

Frequently asked questions

How does SIP grow over time?

SIP grows through compound returns. Each monthly installment is invested and compounds over time. The formula is FV = P × [((1 + r_m)^n - 1) / r_m] × (1 + r_m), where r_m = (1 + annual_rate)^(1/12) − 1.

How much should I invest monthly in SIP?

Invest at least 10–20% of your monthly in-hand salary. At ₹50,000 in-hand, that is ₹5,000–₹10,000/month. At 12% CAGR over 20 years, ₹10,000/month grows to approximately ₹92 lakh.

What is the formula for SIP future value?

FV = P × [((1 + r_m)^n - 1) / r_m] × (1 + r_m), where r_m = (1 + r)^(1/12) − 1, r is annual return as decimal, n is total months. Using r/12 overstates corpus by ~8% over 20 years.

Why is inflation adjustment important in SIP planning?

Inflation erodes purchasing power. Inflation-adjusted value = Future Value ÷ (1 + inflation)^years. At 6% inflation over 20 years, ₹92L nominal becomes approximately ₹28.7L in today's rupees.

What is a SIP calculator with inflation adjustment?

A SIP calculator with inflation adjustment shows you two values: the nominal future corpus (total money accumulated) and the inflation-adjusted corpus — what that money will actually be worth in today's rupees after accounting for rising prices. For long-term goals like retirement, the inflation-adjusted figure is the one that matters most for planning.

How does tax affect SIP returns in India?

Equity mutual fund SIP gains held for more than 12 months are taxed as Long Term Capital Gains (LTCG) at 10% on gains above ₹1 lakh per year. Short-term gains (held under 12 months) attract 15% STCG tax. Debt mutual fund gains are taxed at your income tax slab rate. ELSS funds qualify for ₹1.5L deduction under Section 80C under the old tax regime. This calculator shows pre-tax corpus; consult a SEBI-registered advisor or CA for personalised post-tax planning.

How do I increase my SIP amount every year?

Use a step-up SIP (also called top-up SIP): instruct your platform to automatically increase your SIP by a fixed percentage or amount each year. A 10% annual step-up on a ₹10,000/month SIP means you invest ₹11,000 in year 2, ₹12,100 in year 3, and so on. Over 20 years this step-up approach can grow your corpus significantly compared to a flat SIP. Most platforms (Groww, Upstox, Zerodha) support step-up SIPs in the standard setup flow. Projections are illustrative; actual returns are not guaranteed.

Can I use this calculator for index fund SIPs?

Yes. Enter 10–12% CAGR to approximate Nifty 50 index fund historical returns. Index funds have lower expense ratios (0.1–0.2%) compared to active funds (0.5–1.5%), so your actual net-of-cost return will be slightly lower than the raw CAGR. Adjust your CAGR input downward to account for the expense ratio if you want a more conservative projection.

What is the best mutual fund SIP calculator for India 2026?

The best mutual fund SIP calculator for India uses the correct compound monthly rate formula (not the simplified r/12 approximation), includes an inflation adjustment field so you can see real purchasing power, and shows year-wise wealth accumulation. This calculator meets all three criteria and is updated for 2026 Indian market and tax context. Results are projections, not guaranteed returns.