Best Index Funds in India 2026: Nifty 50, Sensex & How to Pick
An index fund is a mutual fund designed to track the performance of a specific market index — such as the Nifty 50, Sensex, Nifty Next 50, or Nifty 500 — at the lowest possible cost. Instead of paying a fund manager to pick stocks, an index fund simply buys all the stocks in its target index in the same proportion as the index.
Which are the best index funds in India? Every Nifty 50 index fund holds the same 50 companies at the same weights, and every Sensex fund the same 30, so the "best" index fund is not a different portfolio — it is the cheapest one that tracks its index most closely. Pick the index first (Nifty 50 or Sensex for the large-cap core), then compare funds on that index by four numbers: the direct-plan expense ratio, the tracking error, the tracking difference and the fund size (AUM).
In India, the most popular index funds track the Nifty 50 (top 50 companies on NSE) and the Sensex (top 30 companies on BSE). These indices include companies like Reliance, HDFC Bank, TCS, ICICI Bank, Infosys, ITC, L&T, Bharti Airtel, Bajaj Finance — giving you instant exposure to India's largest and most profitable businesses through a single SIP. Broader options include the Nifty Next 50 (companies ranked 51-100, the 'aspiring large caps'), Nifty 100, Nifty 200, Nifty 500 (top 500 companies, ~94% of NSE market cap), and Nifty Midcap 150.
The case for index investing in India is increasingly clear: SPIVA India Scorecard (2024) shows that over a 10-year window, approximately 65-80% of actively managed large-cap funds underperform the Nifty 50 / S&P BSE 100 index after fees. Active large-cap funds charge 1-2% annually; index funds charge as little as 0.05-0.20%. That fee difference, compounded over 20-30 years, represents many lakhs in lost wealth. Active midcap and smallcap funds still beat their indices more often (~50-60%) because Indian small-caps are less efficiently priced — index funds dominate large-caps, active funds compete more credibly in midcap and below.
How to pick the best index fund in India: 4 checks
1. Expense ratio (TER), direct plan. Funds on the same index own the same stocks, so cost is the one difference that is certain. Always compare direct plans; the regular plan of the same scheme holds the same portfolio and pays a distributor out of your return.
2. Tracking error. This is how far the fund's daily return wanders from the index. SEBI caps it at 2% a year for equity index funds and ETFs and requires every fund house and AMFI to publish it daily, so lower is better and you can check it free on the AMC or AMFI website.
3. Tracking difference. This is the actual return gap against the index after costs, published monthly for 1, 3, 5 and 10 years and since launch. It is the closest thing to the real cost you paid, so prefer the fund with the smallest gap over the longest period.
4. Fund size (AUM). Larger funds tend to track more tightly because inflows and redemptions are a smaller share of the portfolio. Use it as a tie-breaker between funds whose cost and tracking are close, not as the first filter.
Read these numbers on the fund house's factsheet or AMFI on the day you invest; they change, which is why this guide teaches the rule rather than crowning one fund. Source: SEBI Master Circular for Mutual Funds (as on 20 March 2026), clause 4.5.4, read 7 October 2026.
Best Nifty 50 index funds in India (2026)
Richify does not republish a fund-by-fund expense-ratio table: TERs change, and SEBI already requires every AMC and AMFI to publish TER and tracking error daily. Compare the current direct-plan TER, tracking error and tracking difference on each AMC factsheet or the AMFI website on the day you invest.
Every Nifty 50 index fund holds the same 50 stocks, so the only things that separate them are the expense ratio (TER), tracking error (how closely the fund mirrors the index — SEBI caps it at 2% a year and requires every AMC to disclose it daily) and AUM (larger funds tend to track more tightly and are more liquid). The rule of thumb: pick the lowest TER with at least ₹500 crore in AUM.
Beyond the Nifty 50: Next 50, Nifty 500 & international
For exposure past the top 50: Nifty Next 50 options include the UTI, Motilal Oswal and ICICI Prudential Nifty Next 50 Index Funds. Broader still, the Motilal Oswal Nifty 500 Index Fund and HDFC Nifty 500 Index Fund track 500 stocks across large, mid and small caps. For global diversification within LRS limits, Indian investors use the Motilal Oswal Nasdaq 100 Fund of Fund, ICICI Prudential US Bluechip Equity Fund (active US exposure) or the Mirae Asset NYSE FANG+ ETF FoF.
How to start a Nifty 50 SIP (step by step)
Start in seven steps: (1) Choose a direct-plan platform (Groww, Zerodha Coin, Kuvera, MFCentral, ETMoney, Paytm Money — all free, all direct plans). (2) Complete KYC (PAN + Aadhaar + bank — usually 10 minutes online). (3) Select 'UTI Nifty 50 Index Fund — Direct Growth' (or any equivalent from the table above). (4) Set the SIP amount (minimum ₹100-500 on most platforms). (5) Pick a SIP date (1st, 5th, 10th, 15th — first working day if it falls on a weekend). (6) Set up an e-mandate (NACH) for auto-debit. (7) Done — the SIP runs every month until you cancel it. For a step-up SIP, also set the annual increase percentage (5-10% is typical).
Historical Nifty 50 returns
Long-run Nifty 50 returns have been strong but volatile. The figures below are point-to-point price-return CAGRs — add roughly 1-2% for dividends reinvested (the Total Returns Index):
| Holding period | Approx CAGR (price return) |
|---|---|
| 5 years | ~14% |
| 10 years | ~12-14% |
| 15 years | ~11-13% |
| 20 years | ~13-15% |
Index fund vs ETF — which to choose
Index funds are bought via the AMC website or mutual-fund apps without a demat account and support true automated SIP through an e-mandate. ETFs trade on the NSE/BSE through a demat account at live prices and carry lower expense ratios but require manual buying each month. For most SIP investors, index funds win on convenience; for lump-sum investors or those already trading, ETFs win on cost. The expense-ratio gap (~0.15-0.20%) is meaningful over 20-30 years (~5-10% of the final corpus), so both routes involve a real trade-off.
Tax on equity index funds (FY 2026-27)
Equity index funds are taxed identically to all other equity mutual funds: LTCG at 12.5% on gains above ₹1.25 lakh per FY (holding > 12 months) and STCG at 20% on gains held < 12 months (STT-paid trades only). Use the ₹1.25 lakh exemption for tax harvesting — book up to ₹1.25 lakh of equity LTCG every FY and rebuy the same fund to step up your cost base tax-free. International index funds (Nasdaq 100, S&P 500 FoFs) are not equity-oriented for Indian tax, but from 1 April 2026 they are no longer slab-taxed either (only funds investing >65% in debt are): held over 24 months, gains are LTCG at 12.5% without indexation — with no ₹1.25 lakh exemption and a longer holding period than domestic Nifty 50 funds.
Common index fund myths
Four myths worth dispelling: (1) 'Index funds give only average returns' — false; they match the index, which beats 70%+ of active funds, so 'average' is the winning strategy. (2) 'I need to time the market for index funds' — false; a SIP through bull and bear markets statistically beats timing attempts. (3) 'Active funds beat the Nifty because India is inefficient' — partially true for small/midcap, demonstrably false for large-cap over 10+ years per SPIVA. (4) 'Direct plans are risky' — false; a direct plan is the SAME fund without distributor commission, and always beats the regular plan by the difference in TER.
For most Indian investors building wealth long-term: a single low-cost direct-plan Nifty 50 index fund (UTI, HDFC and most large AMCs offer one — check the current TER on the AMC factsheet or AMFI) covers 65-75% of NSE market cap and matches what most active large-cap funds fail to deliver. Add a Nifty Next 50 fund for the 'aspiring large caps' tier, and optionally a Nasdaq 100 FoF for global tech exposure. Three funds, ₹500-2000 SIPs each, step up 10% yearly. Richify's AI agents help you compare expense ratios, tracking errors, and historical returns across the major Nifty 50 / Sensex / Next 50 / Nifty 500 / international options and surface the lowest-cost, highest-AUM choice for your goals.
