Best Index Funds for Beginners in 2025: Low-Cost ETFs and Mutual Funds
# Best Index Funds for Beginners in 2025: Low-Cost ETFs and Mutual Funds
Index funds are one of the most reliable tools for a new investor. Instead of trying to pick winning stocks or time the market, an index fund buys a representative slice of a market index, such as the S&P 500 or the entire U.S. stock market. Because the fund's manager only has to track the index rather than beat it, fees stay very low and you instantly own hundreds or thousands of companies. This article covers the best index funds for beginners, what makes them beginner-friendly, and how to build a low-maintenance portfolio.
What Makes an Index Fund a Good Beginner Investment?
Not every index fund is equally easy to own when you're starting out. Look for these five features:
- Low expense ratio. The expense ratio is the annual fee charged by the fund. Many index funds charge just 0.03% to 0.05%, meaning you pay $0.30 to $0.50 per $1,000 invested each year. Actively managed mutual funds often charge ten times more.
- Broad diversification. A total stock market fund or S&P 500 fund holds hundreds or thousands of securities, so one failing company won't sink your portfolio.
- Low minimum investment. Some mutual funds require $1,000 or more to start, but many today have $0 or $1 minimums. ETFs can be bought for the price of one share, and major brokers also allow fractional shares.
- Large fund provider. Vanguard, Fidelity, Schwab, and BlackRock have decades of indexing experience, deep resources, and low costs. You want a fund company that will be around for the long term.
- Accurate tracking. A good index fund closely matches the performance of its benchmark. Checking a fund's historical tracking error is a quick way to spot potential issues.
A useful rule for beginners: a difference of 0.02% in fees matters far less than whether you invest consistently. The real advantage of index funds is that they remove the need to guess which stocks or active managers will outperform.
Four Broad-Market Index Funds You Can Build a Portfolio Around
The best index funds for beginners are broad, cheap, and easy to buy. Here are four standout options, each with a slightly different structure:
- Fidelity ZERO Total Market Index Fund (FZROX). This fund has a 0% expense ratio and no minimum investment. It tracks the Fidelity U.S. Total Investable Market Index, giving you exposure to thousands of U.S. stocks. The catch: it is only available at Fidelity, and you cannot transfer it to another brokerage if you move.
- Vanguard S&P 500 ETF (VOO). VOO charges a rock-bottom 0.03% expense ratio and tracks the S&P 500, meaning you own 500 of the largest U.S. public companies. It is one of the most popular ETFs in the world and trades on major exchanges. With a share price around $500 in early 2025, many brokers now allow buying fractional shares.
- iShares Core S&P 500 ETF (IVV). IVV is essentially the same as VOO—it tracks the S&P 500 with a 0.03% expense ratio—but it is issued by BlackRock. Choosing between VOO and IVV often comes down to your brokerage and personal preference. Both have excellent liquidity and long track records.
- Schwab Total Stock Market Index Fund (SWTSX). This mutual fund has a $1 minimum and a 0.03% expense ratio. It tracks the Dow Jones U.S. Total Stock Market Index and includes a wide range of U.S. stocks. If you already have a Schwab account, it is a simple, automatic-investing-friendly choice.
Any one of these is an excellent core holding. In fact, data from S&P Dow Jones Indices' SPIVA report repeatedly shows that a majority of actively managed U.S. large-cap funds fail to beat the S&P 500 over 10-year periods. A low-cost S&P 500 or total market index fund historically outperforms most active managers after fees—before you consider the added time and stress.
Two Diversifiers Every Beginner Should Know
After you have a U.S. stock core, adding international stocks and bonds can reduce your portfolio's overall risk. Two funds are especially popular with beginners:
- Vanguard Total International Stock ETF (VXUS). VXUS charges a 0.05% expense ratio and holds roughly 8,000 stocks in developed and emerging markets outside the U.S. International stocks do not always move in step with U.S. stocks, so they can smooth your returns over time.
- Vanguard Total Bond Market ETF (BND). BND charges 0.03% and holds thousands of U.S. investment-grade bonds. Bonds tend to be less volatile than stocks and often rise when stocks fall, making them a useful ballast for your portfolio. Younger investors may want a smaller bond allocation, but even 10% to 20% can help.
- Target-date funds as an all-in-one shortcut. If you want maximum simplicity, a target-date fund like the Vanguard Target Retirement 2065 Fund (VLXVX) charges just 0.08% and invests in a diversified mix of four Vanguard index funds. The fund automatically becomes more conservative as your target date approaches. You never have to rebalance.
For a beginner who values simplicity above everything, a single target-date fund can outperform a DIY three-fund portfolio if it keeps you from making emotional mistakes.
Index ETF vs. Index Mutual Fund: Which Should Beginners Choose?
Both ETFs (exchange-traded funds) and mutual funds can work well. The differences are operational:
- Trading flexibility. ETFs trade throughout the day like stocks, while mutual funds trade once at the end of the day at the net asset value.
- Dollar amounts. Mutual funds usually allow you to invest exact dollar amounts each month, which makes automatic investing easy. ETFs require you to buy whole shares, unless your broker supports fractional shares, which most major brokers now do.
- Minimums. Many mutual funds have a $1 minimum, while ETFs are only as expensive as one share. With fractional ETFs, the minimum can be as low as a few dollars.
- Transferability. You can typically hold ETFs at any brokerage, but some proprietary mutual funds like Fidelity's ZERO funds cannot be transferred to another firm.
If you want to set up recurring contributions and forget about it, an index mutual fund is often simpler. If you want lower minimums and the ability to move your money easily, an ETF may be better. Several beginner-friendly brokerages now let you buy fractional ETF shares for as little as $5, so cost is no longer a real barrier.
A Simple Three-Fund Beginner Portfolio Example
Once you open a taxable brokerage account or an IRA, you can build a globally diversified portfolio with just three index funds. This approach is known as the three-fund portfolio:
- 60% U.S. stocks: Use VTI, VOO, IVV, FZROX, or SWTSX.
- 20% International stocks: Use VXUS or a similar international index fund.
- 20% U.S. bonds: Use BND or a low-cost bond index fund.
Let's say you invest $100 per month. That might look like $60 into a U.S. stock fund, $20 into an international stock fund, and $20 into a bond fund. You can automate these contributions through your brokerage. Once a year, rebalance your portfolio by selling a bit of what performed well and buying what lagged to bring percentages back in line.
If you only have enough to start with one fund, choose a total U.S. stock market fund or an S&P 500 fund. You can add international and bonds later as your account grows. The key is to start now, not to find the perfect allocation. This is educational information, not personalized investment advice.
Mistakes to Avoid as a Beginner Index Investor
The biggest threat to your returns will not be your fund choice—it will be your behavior. Avoid these common pitfalls:
- Chasing the previous year's winner. Index funds that track different corners of the market rotate in popularity. Stick to broad funds and avoid sector funds like technology or health care as your core.
- Owning overlapping funds. Buying VOO and VTI, or FZROX and SWTSX, gives you redundant exposure. You only need one U.S. stock index fund.
- Checking your balance every day. Daily price moves are noise. Over a 20-year period, short-term drops matter little, but panic selling can lock in losses.
- Ignoring fees in a brokerage account. While expense ratios are low, watch out for account fees, commissions, or sales loads. Choose a commission-free brokerage and a no-transaction-fee fund.
- Delaying because of analysis paralysis. Any of the funds on this list is a solid choice. The biggest mistake is not investing at all while waiting for the 'perfect' index fund.
Because index funds are low maintenance, the hardest part is staying invested. By automating your contributions, you can build wealth without being glued to financial news.
Bottom Line
The best index funds for beginners are straightforward, low-cost, and broadly diversified. FZROX, VOO, IVV, SWTSX, VXUS, BND, and target-date funds all meet that bar. The real challenge is not selecting a single fund; it is showing up month after month, staying invested through downturns, and letting compounding do the heavy lifting. Choose one broad U.S. stock fund to start, then gradually add international stocks and bonds. Automate your investments, rebalance once a year, and ignore short-term market noise.
Frequently Asked Questions
What is the best index fund for a first-time investor?
A broad U.S. stock market fund like Fidelity ZERO Total Market Index Fund (FZROX) or Vanguard Total Stock Market ETF (VTI) is a great start. Both offer instant diversification, tiny expense ratios, and no need to pick individual stocks.
Are S&P 500 index funds enough for beginners?
An S&P 500 fund like VOO or IVV is an excellent core holding, but adding international and bond index funds can reduce volatility and broaden your diversification. You can start with just an S&P 500 fund and add the others later.
How much money do I need to invest in an index fund?
Many brokers allow fractional ETF shares and mutual funds with $1 minimums. Fidelity's FZROX has no minimum and a 0% expense ratio, so you can start investing with just a few dollars as long as your brokerage has no account minimum.
References
