S&P 500 Index Funds: The Simple Way to Put Money to Work

1What an S&P 500 Index Fund Actually Is

It is a basket fund that copies the S&P 500 index. When the index goes up or down, the fund follows it, minus a small yearly fee.

The S&P 500 tracks about 500 of the biggest public companies in the US, weighted by size, so names like Apple, Microsoft and Nvidia make up a large share. An index fund does not try to beat the market. It just holds what the index holds. That keeps costs low and removes the need to pick stocks. Over long periods the S&P 500 has gone up on average, but it has also dropped 30% or more in bad years, so the money you put in should be money you can leave alone for years.

2The Main S&P 500 Funds Side by Side

VOO, IVV and SPY are ETFs you can buy at almost any broker. FXAIX is a Fidelity mutual fund. All four hold the same 500 companies.

The real differences are cost and how you buy them. Expense ratios below are as of November 2026, so check the fund page before you buy, since fees can change.

1. VOO (Vanguard S&P 500 ETF): 0.03% a year, so $3 per $10,000 invested
2. IVV (iShares Core S&P 500 ETF): 0.03% a year
3. SPY (SPDR S&P 500 ETF Trust): about 0.0945% a year, the oldest and most traded, popular with active traders
4. FXAIX (Fidelity 500 Index Fund): 0.015% a year, mutual fund, no minimum at Fidelity

3Best Index Funds to Buy for the Long Term

For long term investors the cheapest broad fund they will actually hold through bad years is usually the best one.

Beyond the S&P 500, many long term investors look at total market funds like VTI or FSKAX, which add thousands of smaller US companies, and international funds like VXUS for companies outside the US. A simple mix of a US fund and an international fund is a common starting point. The biggest long term factors are low fees, time in the market and not selling in a panic. Picking the perfect fund matters much less than sticking with a plan.

4How to Start With a Small Amount

Most brokers now sell fractional shares, so you can start with $5 or $10 and set up automatic buys.

Open a brokerage account or IRA, pick one broad fund, and schedule an automatic purchase each payday. Automating it means you are not deciding every month whether now is a good time. This is the same idea behind everything we teach at The No Job Lifestyle: set up money that works for you in the background, so you only spend about 5 minutes a day checking in instead of watching charts.

5Where This Fits in The No Job Lifestyle Plan

Index funds are a slow and steady base. Many people pair them with other passive income ideas while they build toward leaving their job.

An index fund grows over decades, not weeks. If your goal is to replace a paycheck sooner, it helps to look at other streams too, such as digital products, faceless content or letting AI trade for you with a small slice of money you can afford to risk. Our free guide walks through these options for beginners. Investing and trading can lose money. This page is general education, not personal financial advice.