Mutual funds let you own pieces of many companies with a small amount of money, but not all funds work the same way or cost the same to start

A mutual fund pools money from many investors to buy stocks, bonds, or other investments. Instead of picking individual companies yourself, a fund manager does it for you. The appeal for lower-income savers is that you can start with $50 or $100 instead of needing thousands to buy individual stocks.

The catch is that funds charge fees, and those fees eat into your returns over time. Some funds also have minimum investments that lock you out entirely. Before you hand over money, you need to understand what you're paying for and whether a fund's strategy matches what you're trying to do with your money.

Key Takeaways

  • Index funds and target-date funds typically charge the lowest fees and require the smallest starting investments for lower-income savers.
  • Expense ratios — the annual percentage you pay to own a fund — can range from 0.03% to over 1%, and that difference compounds over decades.
  • Many brokerages now offer zero-minimum mutual funds or let you start with $1, eliminating the barrier of high initial deposits.
  • Your timeline matters: if you need the money in five years, a stock-heavy fund is riskier than a bond-heavy one, regardless of fees.
  • Employer retirement plans like 401(k)s often offer mutual funds with no minimum investment, making them a practical starting point.

Understanding expense ratios and why they matter to your money

Every mutual fund charges a fee called an expense ratio, expressed as a percentage of what you invest. A fund charging 0.10% takes $10 per year from every $10,000 you own. A fund charging 1.00% takes $100 from that same $10,000. Over 30 years, that difference adds up to thousands of dollars in lost growth.

Lower-income savers should focus on funds with expense ratios below 0.20%. Index funds — which simply track a market index like the S&P 500 rather than trying to beat it — typically charge 0.03% to 0.10%. Actively managed funds, where a manager picks stocks trying to outperform the market, often charge 0.50% to 1.50% or higher. The irony is that most actively managed funds do not beat their index fund counterparts over long periods, so you are paying more for results that are often worse.

Check the expense ratio before you invest. It is listed in the fund's prospectus and on most brokerage websites. If you are comparing two funds with similar goals, pick the one with the lower expense ratio.

Minimum investments: where the real barrier sits

Historically, mutual funds required $1,000 to $3,000 to open an account, which kept lower-income savers out entirely. That has changed. Many brokerages now offer mutual funds with no minimum investment or a $1 minimum. Vanguard, Fidelity, and Schwab all have options that let you start small.

If you have access to an employer 401(k) or similar retirement plan, there is usually no minimum investment at all — you contribute whatever amount you choose from your paycheck. That is often the easiest entry point for lower-income workers, especially if your employer matches contributions. A 3% match is assistance programs and should be your first priority before investing elsewhere.

If you do not have an employer plan, open an account at a major brokerage and look for their no-minimum or low-minimum funds. The fund itself may have a minimum, but the brokerage account does not.

Index funds versus target-date funds for hands-off investing

Index funds track a specific market index — the S&P 500, the total stock market, or bond indexes. They are simple, cheap, and require almost no decision-making after you buy in. If you want broad exposure to the stock market and do not want to think about rebalancing, an S&P 500 index fund is a solid choice.

Target-date funds automatically shift from stocks to bonds as you approach retirement. A target-date 2055 fund is heavy on stocks now and gradually becomes more conservative over the next 30 years. This is useful if you want one fund that handles the strategy for you. Target-date funds typically charge slightly higher expense ratios than index funds — often 0.10% to 0.20% — but the convenience may be worth it if you are unlikely to rebalance on your own.

For a lower-income saver with a long timeline and limited time to manage investments, a target-date fund or a simple index fund in a Roth IRA is often the best choice. Both are passive, meaning they do not require you to pick individual stocks or time the market.

Tax-advantaged accounts make a bigger difference than fund choice

Where you hold a mutual fund matters as much as which fund you choose. A Roth IRA lets your money grow tax-free and you pay no taxes on withdrawals in retirement. A traditional IRA lets you deduct contributions from your taxes now and pay taxes on withdrawals later. A regular taxable brokerage account gives you no tax break at all.

For lower-income savers, a Roth IRA is usually the better choice because your tax rate is likely low now and higher in retirement. You can contribute up to $7,000 per year (as of 2024, though this changes). If you do not have that much to invest, contribute what you can — there is no minimum.

An employer 401(k) is even better if available, because contributions come straight from your paycheck before taxes and many employers match a percentage. Max out the match first, then open a Roth IRA with additional savings.

Avoiding common traps: loads, sales commissions, and complexity

Some mutual funds charge a load, which is a sales commission paid to the broker who sells it to you. A front-end load of 5% means $50 of every $1,000 you invest goes to the broker, not into the fund. Avoid loaded funds entirely. There is no reason to pay a commission when no-load funds with identical strategies exist.

Funds sold through financial advisors often carry loads or higher expense ratios. If you are working with an advisor, ask explicitly whether the funds they recommend are loaded and what the expense ratio is. A fee-only advisor (who charges you directly rather than taking commissions) is more likely to recommend low-cost funds.

Avoid funds with complex strategies, sector bets, or names that sound like they are trying to time the market. "Emerging markets growth" or "technology sector" funds are bets that a specific part of the market will outperform. For a lower-income saver building a foundation, broad index funds are simpler and cheaper.

Building a simple portfolio on a tight budget

You do not need many funds. A lower-income saver with a long timeline can build a solid portfolio with two or three funds: a U.S. stock index fund, an international stock index fund, and a bond index fund. Allocate based on your timeline — if you will not need the money for 20+ years, 80% stocks and 20% bonds is reasonable. If you need it in 10 years, flip that to 60% stocks and 40% bonds.

If you want even simpler, buy a single target-date fund that matches your expected retirement year. It handles the allocation for you and rebalances automatically. The expense ratio will be slightly higher, but the simplicity and lower chance of making emotional decisions may be worth it.

Start with whatever amount you can afford — $50, $100, or $500. Consistency matters more than size. Investing $100 per month for 30 years beats investing $5,000 once, because of compound growth and because you are buying more shares when prices are low and fewer when prices are high.

Frequently Asked Questions

Can I start investing in a mutual fund with less than $100?

Yes. Many brokerages now allow $1 minimum investments or no minimum at all. Employer retirement plans typically have no minimum — you contribute whatever you choose. If you have access to a 401(k), that is often the easiest place to start, especially if your employer matches contributions.

What is the difference between a mutual fund and an ETF?

ETFs (exchange-traded funds) work similarly to mutual funds but trade like stocks throughout the day, while mutual funds trade once per day after the market closes. For a lower-income saver, the differences are small. Both can have low expense ratios, and both can be held in IRAs. ETFs sometimes have lower minimums, but mutual funds are fine if that is what your brokerage offers.

Should I pick a fund based on past performance?

No. Past performance does not predict future results, and funds that outperformed in one period often underperform in the next. Focus on expense ratio, strategy, and whether the fund matches your timeline instead. A boring fund with a 0.05% expense ratio will likely beat a flashy fund charging 1.00%, even if the flashy fund performed well recently.

What happens if the fund manager leaves or the fund closes?

If a manager leaves, the fund continues operating under new management — your money stays invested. If a fund closes, the brokerage automatically moves your shares to a similar fund at no cost to you. Neither event should cause you to panic or sell.

Is it better to invest a lump sum or add money gradually?

Mathematically, lump-sum investing has historically outperformed dollar-cost averaging (adding gradually) over long periods. But psychologically, adding money gradually feels safer and is easier to stick with on a tight budget. For a lower-income saver, the consistency of adding $50 or $100 monthly matters more than the timing. Do what you will actually follow through on.