The best index fund for a beginner is the one you can actually open, afford, and hold without confusion — low fees, no minimums, and broad diversification.
The best index fund for a beginner isn't necessarily the one with the highest return last year. It's the one you can actually open, afford, and hold without confusion. That means low or zero expense ratios, no minimum investment, and broad diversification that doesn't require constant decisions.
Here are the six best index funds for new investors in 2026 — sorted by where you invest, not by marketing hype.
Before the picks: here's the filter.
Low expense ratio. This is the annual fee the fund charges, automatically deducted from returns. For index funds, there's no reason to pay more than 0.05% per year. The best options charge less than half that.
No investment minimum (or a low one). Some funds require $3,000 to open. Others require $0. If you're starting out, the $0 option lets you begin with whatever you have.
Broad diversification. A single fund that holds 500+ companies gives you instant exposure across sectors and market caps. You don't need to pick industries or balance a portfolio on day one.
Available at your brokerage. A fund that charges a transaction fee at your brokerage erases any expense ratio advantage. Buy at the home brokerage whenever possible.
FZROX — Fidelity ZERO Total Market Index Fund
FZROX is the most cost-efficient index fund in existence. Literally zero fees. For Fidelity investors who plan to stay at Fidelity, it's the default recommendation.
The one caveat: FZROX tracks Fidelity's proprietary total market index — not a public index like the CRSP US Total Market. That means it can't be transferred to another brokerage in-kind. If you ever move accounts, you'd need to sell first, which is a taxable event. It's a non-issue if you're planning to stay at Fidelity; it's worth knowing if you're not sure.
FXAIX — Fidelity 500 Index Fund
FXAIX tracks the actual S&P 500, which makes it more portable than FZROX and arguably the better default for investors who might not stay at Fidelity forever. The 0.015% fee is $1.50 per year on $10,000 invested — effectively free.
SWPPX — Schwab S&P 500 Index Fund
SWPPX has been around since 1997 — one of the oldest S&P 500 index funds available. At Schwab, it's free to buy and sell. Anywhere else, it may carry a transaction fee. If you're a Schwab customer, this is the natural starting point.
SWTSX — Schwab Total Stock Market Index Fund
SWTSX holds everything SWPPX holds, plus thousands of additional mid-cap and small-cap companies. If you want the broadest possible U.S. exposure in a single fund, SWTSX is a slightly better diversifier. The returns are nearly identical to SWPPX over long periods.
VTSAX — Vanguard Total Stock Market Index Fund
VTSAX is the gold standard for total U.S. market exposure. Vanguard invented low-cost index investing in the 1970s, and VTSAX is the product of that legacy. The $3,000 minimum is the only barrier — if you have it, this is an excellent core holding.
For investors without $3,000 yet, Vanguard's ETF version (VTI) has no minimum and trades at the price of one share (~$250–$280 depending on market).
VFIAX — Vanguard 500 Index Fund Admiral Shares
VFIAX is the mutual fund that sparked the index investing revolution. Same structure as VTSAX but focused on the S&P 500 specifically. The $3,000 minimum applies here too.
New investors frequently ask which is better: a fund that tracks the S&P 500 (500 large companies) or a total market fund (3,500+ companies including small and mid caps).
The honest answer: it barely matters.
Over the past 20 years, total market and S&P 500 funds have delivered returns within 0.2–0.5 percentage points of each other annually. The S&P 500 has a profitability filter (companies must show positive earnings to qualify). Total market funds don't — they hold every publicly traded U.S. company.
For a beginner, either is an excellent starting point. You can always adjust later. The bigger decisions — how much you invest, whether you actually start, and whether you hold through a downturn — dwarf this choice entirely.
| Fund | Minimum |
|---|---|
| FZROX (Fidelity) | $0 |
| FXAIX (Fidelity) | $0 |
| SWPPX (Schwab) | $0 |
| SWTSX (Schwab) | $0 |
| VTSAX (Vanguard) | $3,000 |
| VFIAX (Vanguard) | $3,000 |
If you have less than $3,000, start with FZROX or FXAIX at Fidelity, or SWPPX at Schwab. You can always transfer to Vanguard later if you prefer their platform.
If you don't have a brokerage account yet: Fidelity and Schwab both have no-minimum accounts and are widely regarded as the best platforms for beginning investors. Either is a strong choice.
Set up automatic contributions. The single most important thing you can do. Invest a fixed amount on a set schedule — monthly, biweekly, whatever matches your paycheck — and automate it. This is dollar-cost averaging in practice. It removes the temptation to time the market.
Don't check it constantly. Watching daily moves does nothing except create anxiety. Set a quarterly review reminder and otherwise leave it alone.
Don't sell when it drops. It will drop. Every S&P 500 fund fell 30%+ in 2022. It recovered. Every index fund dropped sharply in March 2020. It recovered and hit new highs within months. The investors who lost money were the ones who sold.
Understand what you own. If your fund tracks the S&P 500, read our S&P 500 guide so you understand the 500 companies you now part-own. If you're in a total market fund, you own a tiny slice of the entire U.S. economy.
| Your Brokerage | Best Starting Fund |
|---|---|
| Fidelity | FZROX (0% fee, total market) or FXAIX (0.015%, S&P 500) |
| Schwab | SWPPX (0.02%, S&P 500) or SWTSX (0.03%, total market) |
| Vanguard (with $3K) | VTSAX (0.04%, total market) or VFIAX (0.04%, S&P 500) |
| Other / undecided | FXAIX at Fidelity — best fee, no minimum, tracks S&P 500 |
All six of these funds are excellent. The difference between them in 30-year outcomes is smaller than the difference between investing and not investing.
Pick one. Automate a monthly contribution. Don't touch it.
For a deeper comparison of specific funds, use our comparison tool to see expense ratios, returns, and holdings side by side.
What is the best index fund to start with as a beginner?
FZROX (Fidelity) and FXAIX (Fidelity) are the easiest starting points — no minimum, near-zero fees, and available to anyone. SWPPX (Schwab) is equally strong if you prefer Schwab's platform. The right answer depends on which brokerage you use.
How much should I invest to start?
As much as you can consistently commit to on a recurring basis. Starting with $100/month in FXAIX is better than waiting until you have $10,000 for a lump-sum investment. The habit matters more than the initial amount.
Is it safe to put all my money in one index fund?
Broad market index funds like VTSAX or FXAIX hold hundreds or thousands of companies, so they're already diversified internally. Putting all of your investment portfolio in one total market fund is a reasonable strategy — it's what many serious long-term investors do. You'd still want cash savings and appropriate bonds as you approach retirement.
What's the difference between an index fund and a mutual fund?
All index funds are a type of mutual fund — they're just passively managed (tracking an index) rather than actively managed (a manager picking stocks). See our What Is an Index Fund? guide for the full breakdown.
When is the best time to start investing in index funds?
The research is clear: as early as possible. Every year of delay costs you. A 25-year-old who invests $200/month until 65 ends up with roughly twice as much as a 35-year-old who starts the same habit. The "best time" to start is now.
Data from CompareMutualFunds.com fund database, updated via Yahoo Finance. Past performance does not guarantee future results. This article is for educational purposes only and is not investment advice.
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