Best Index Funds for Beginners: 6 Broad, Cheap Funds Compared
Quick answer
The best index funds for beginners are broad, cheap and boring: an S&P 500 fund, a total US market fund or a total world fund charging under 0.10% a year with little or no minimum investment. FXAIX, SPYM, VOO, VTI, FZROX and VT all qualify, and the account you hold them in usually matters more than the ticker.
Six beginner-friendly index funds compared (figures verified July 2026)
| Fund (ticker) | Category | Type | Expense ratio | Minimum investment |
|---|---|---|---|---|
| Fidelity 500 Index Fund (FXAIX) | S&P 500 | Mutual fund | 0.015% | None |
| SPDR Portfolio S&P 500 ETF (SPYM, formerly SPLG) | S&P 500 | ETF | 0.02% | One share, or fractional at most brokerages |
| Vanguard S&P 500 ETF (VOO) | S&P 500 | ETF | 0.03% | One share, or fractional at most brokerages |
| Vanguard Total Stock Market ETF (VTI) | Total US market (about 3,500 stocks) | ETF | 0.03% | One share, or fractional at most brokerages |
| Fidelity ZERO Total Market Index Fund (FZROX) | Total US market | Mutual fund | 0.00% | None (Fidelity accounts only) |
| Vanguard Total World Stock ETF (VT) | Total world (about 10,000 stocks, US and international) | ETF | 0.06% | One share, or fractional at most brokerages |
Most pages on the best index funds for beginners dress up a simple truth in a ranking format: once a fund is broad and costs next to nothing, there is no meaningful "best" left to find. The six funds in the table above are an editorial shortlist built on three criteria (expense ratio, breadth of holdings, minimum investment), not a league table with a winner. Any of them is a perfectly reasonable core holding, and this page will not pretend otherwise. All figures were verified against fund provider data in July 2026.
The real choice is between three categories, not six tickers. An S&P 500 fund (FXAIX, SPYM, VOO) holds the roughly 500 largest US companies; the full first-principles picture, including the concentration caveat, is in our S&P 500 index fund guide. A total US market fund (VTI, FZROX) adds the small and mid-cap tail, about 3,500 stocks in VTI's case, though the two categories overlap so heavily that VTI vs VOO finds only one real difference. A total world fund (VT) goes furthest: about 10,000 stocks across the US and international markets in one ticker, for which you pay 0.06% instead of 0.03%. Wider net, slightly higher fee, and no need to ever decide how much international exposure to hold.
On the criteria themselves. Expense ratio first, because it is the one number that predicts nothing about markets and everything about your costs: the spread across this table runs from 0.00% to 0.06%, a maximum of $6 a year per $10,000. Breadth second, because a beginner fund should make diversification automatic rather than a project. Minimums third, and they have almost vanished: FXAIX and FZROX take any amount, and fractional shares at most brokerages do the same job for the ETFs. FZROX's 0.00% fee deserves its one asterisk: the ZERO funds are exclusive to Fidelity accounts, so switching brokerages later means selling the fund, which can trigger capital gains tax in a taxable account. A free fund with a lock-in is cheap, not costless.
The part the fund rankings skip: the account matters more than the ticker. A 401(k) with an employer match, an IRA, and a taxable brokerage account will produce very different after-tax outcomes from the identical fund, and no expense ratio difference in this table comes close to the value of a matched 401(k) contribution. Get the account right, pick any fund above, automate the contribution, then stop looking at it. The wrapper mechanics are covered in index funds vs mutual funds vs ETFs, the income side in VOO's dividend yield, and if the SPY ads have you wondering why anyone pays 0.0945% for the same index, VOO vs SPY has the answer. More US explainers live at our US articles hub, and the compounding calculators at the US tools hub will show you what a monthly contribution does over 30 years. This page is general information, not personal investment advice: index funds are stock funds, and their value can fall as well as rise.
Frequently asked questions
What is the best index fund for a beginner?
Any broad, cheap fund from a major provider: an S&P 500 fund like FXAIX or VOO, a total US market fund like VTI or FZROX, or a total world fund like VT. All six funds in the table charge 0.06% a year or less, which is $6 or less per $10,000 invested. The differences between them are small next to the difference between investing and not investing.
Are index funds good for beginners?
They are widely regarded as the sensible starting point, and the SEC's own investor education material notes their low costs and built-in diversification. One fund purchase buys hundreds or thousands of companies with no stock-picking required. They are still stock funds, though: broad US indexes have historically fallen 30% to 50% in bad bear markets, so the money needs a long time horizon.
How much money do I need to start investing in index funds?
Effectively nothing. FXAIX and FZROX have no minimum investment, and most major US brokerages offer fractional ETF shares, so $10 buys a $10 slice of VOO, VTI or VT. The old $1,000-plus mutual fund minimums are mostly gone at the beginner end of the market. What matters is the recurring contribution, not the opening balance.
Should a beginner buy an ETF or a mutual fund index fund?
Either. A mutual fund takes exact dollar amounts and fills once a day at the closing price, which suits automated monthly investing. An ETF trades all day like a stock and moves between brokerages more easily. The portfolios inside can be identical. The one trap: FZROX and the other Fidelity ZERO funds can only be held at Fidelity, so moving brokerages later means selling.
What are the best performing index funds of the last 10 years?
US large-cap funds lead the trailing tables: the S&P 500 returned about 14.8% a year for the ten years to December 2025, per Fidelity's data, so S&P 500 and total US market funds top most 10-year rankings. That is a backward-looking fact, not a forecast. Picking funds by trailing returns is how investors end up buying the last decade's winner. Past performance does not guarantee future results.
Is it better to buy index funds in a 401(k) or an IRA?
The usual ordering is 401(k) up to any employer match first, because the match is an instant return no fund can offer, then an IRA for its wider fund menu, then back to the 401(k) or a taxable account. The same index fund behaves very differently after tax depending on the account around it. This is general information, not personal advice; contribution limits and tax treatment depend on your circumstances.
Sources
- Investor.gov (SEC) - Index funds: investor education page
- Stock Analysis - FZROX fund data, 0.00% expense ratio (checked July 2026)
- Stock Analysis - VT fund data, 0.06% expense ratio and holdings count (checked 6 July 2026)
- State Street - SPDR Portfolio S&P 500 ETF (SPYM) fund page (checked 6 July 2026)
- Fidelity - What is the S&P 500 average return?
General information, not financial advice. Tax rules and figures can change; check the current position on irs.gov or ssa.gov before acting.