Index funds and ETFs both track a benchmark like the Nifty 50. Yet investors often treat them as interchangeable when they're not. The differences are subtle but meaningful, especially for Indian investors.
How they work
An index fund is a regular mutual fund. You buy and sell at the end-of-day NAV, and the fund house handles everything. An ETF trades on the stock exchange like a share — you need a demat account, place orders during market hours, and pay brokerage.
Cost comparison
ETFs typically have lower expense ratios (0.03%–0.10%) vs index funds (0.10%–0.20%). But ETFs have hidden costs: brokerage per transaction, bid-ask spreads (the gap between buy and sell price), and potential tracking error from low liquidity. For small monthly SIPs, index fund costs often work out lower in practice.
Liquidity matters
Liquidity is the silent killer of Indian ETFs. Many Nifty ETFs trade only a few lakhs per day. Low volume means wider bid-ask spreads, which means you might buy at a 0.3%–0.5% premium to NAV. This erases the expense ratio advantage. Stick to ETFs with daily volumes above 5 crore.
SIP convenience
Index funds support automatic SIPs through any platform — Groww, Kuvera, Zerodha Coin. ETF SIPs require you to place manual orders or use a broker's basket order feature, which is clunkier. For the discipline of automatic monthly investing, index funds win on convenience.
When to pick an ETF
ETFs shine for lumpsum investors who want intraday control, or for sophisticated investors running tactical allocation strategies. If you're a buy-and-hold SIP investor, an index fund is the simpler, friction-free choice.
The verdict
For most Indian retail investors doing monthly SIPs, index funds are the practical choice. For lump sums above 5 lakh where you want precision pricing, look at high-volume ETFs. Use our explore page to filter by fund type.