If you’ve ever tried to research investing and ended up more confused than when you started — you’re not alone. Between stock tips, cryptocurrency debates, and financial influencers all shouting different advice, it can feel impossible to know what actually makes sense for a regular family.
Here’s the good news: for most families, the answer is remarkably simple. It’s called an index fund, and it’s probably the most powerful, low-effort investment tool available to everyday people. No expertise required.
What Is an Index Fund, Actually?
An index fund is a type of investment that tracks a market index — basically a pre-set list of stocks.
The most well-known index is the S&P 500, which tracks the 500 largest publicly traded companies in the United States. When you buy an S&P 500 index fund, you’re automatically buying a tiny slice of all 500 companies — Apple, Microsoft, Amazon, and 497 others — in one simple purchase.
Another common index is the Total Stock Market, which includes thousands of US companies of all sizes. There are also international indexes, bond indexes, and more.
The key point: you’re not betting on one company. You’re betting that the broad market — and the economy as a whole — will grow over time. Historically, it has.
Why Index Funds Are Perfect for Busy Parents
Active investing — picking individual stocks, timing the market, researching companies — takes time and expertise. Most parents have neither to spare. Index funds sidestep all of that.
Here’s what makes them such a good fit for families:
- They’re low cost. Traditional actively managed funds pay professional stock pickers to try to beat the market. Those managers charge fees — often 0.5% to 1.5% per year. Index funds just follow a list. Fees are typically 0.03–0.20%. That difference compounds into thousands of dollars over decades.
- They’re already diversified. When you own one S&P 500 index fund, you own a piece of 500 companies across dozens of industries. If one company tanks, it barely moves your overall portfolio. That built-in diversification is hard to replicate by hand.
- They require almost no maintenance. You don’t need to watch the news, track earnings reports, or rebalance constantly. Set up automatic contributions, choose a fund, and check in once or twice a year.
- They perform well. This is the part that surprises people: most professional fund managers, despite their expertise and full-time focus, fail to consistently beat the index. Over a 20-year period, roughly 80–90% of actively managed funds underperform their index. So doing less — just buying the index — often produces better results.
How to Pick an Index Fund
You don’t need to agonize over this. For most families, any of the following are excellent choices:
For a broad US market exposure:
- Vanguard Total Stock Market Index Fund (VTSAX / VTI)
- Fidelity ZERO Total Market Index Fund (FZROX — no expense ratio at all)
- Schwab Total Stock Market Index (SWTSX)
For S&P 500 specifically:
- Vanguard S&P 500 ETF (VOO)
- Fidelity 500 Index Fund (FXAIX)
- Schwab S&P 500 Index Fund (SWPPX)
The differences between these are minor. What matters more is picking one and actually starting. Don’t let choice paralysis delay you by months or years.
One thing to look for: expense ratio. This is the annual fee expressed as a percentage. Aim for under 0.20%. The funds listed above are all well under that.
How to Get Started With a Small Amount
You don’t need thousands of dollars to begin. Many brokerages now allow you to start with $1. Here’s a simple path:
- Open a brokerage account. Fidelity and Schwab are both excellent for beginners — no account minimums, no trading fees, and good educational resources. If you’re investing for retirement, open a Roth IRA first (see our guide to how to start investing as a family for the full breakdown on account types).
- Fund your account. Link your bank account and transfer in whatever you can start with — even $50 or $100.
- Buy your chosen index fund. Search for the ticker symbol (like VTI or FXAIX), choose the dollar amount, and buy. That’s it.
- Set up automatic contributions. Even $25 or $50 a month added consistently will build up significantly over time. Automate it so it happens without effort.
What About When the Market Drops?
It will. That’s guaranteed. The market goes down sometimes — occasionally by a lot. The S&P 500 has dropped 30%, 40%, even 50% during major crises. Every time, it has recovered and gone on to new highs.
The mistake most investors make is selling when the market drops. They lock in their losses and then miss the recovery. The investors who do nothing — or better yet, keep buying at the lower prices — come out ahead.
This is easier said than done when you’re watching your balance fall. But index fund investing only works if you stay in it for the long haul. The strategy assumes you won’t need this money for 10, 20, or 30 years.
If you’re investing money you’ll need in the next 2–3 years, index funds probably aren’t the right vehicle — keep that in a high-yield savings account instead.
A Simple Starting Plan for a Family
Here’s what a simple, effective family investing plan might look like:
- Open a Roth IRA, contribute up to the annual limit if possible
- Open a custodial account for each child (more on that in a separate post)
- Invest everything in one low-cost total market or S&P 500 index fund
- Set up automatic monthly contributions — even $50 to start
- Review once a year, rebalance if needed, otherwise leave it alone
That’s genuinely it. You don’t need more complexity than this.
For more ideas on building income you can put toward investing, check out our guide to passive income ideas for families. And if you want a structured way to save more, our family savings challenge is a great starting point.
The Best Investment Decision You Can Make
Index funds aren’t exciting. They don’t make for good dinner party conversation. But for families who want to grow wealth steadily, with minimal effort and minimal fees, they are hard to beat.
Start simple. Start small. Start now. Future you will look back and be very glad you did.