Can I Invest My 401(k) In Stocks? | Grow Your Retirement Savings

Yes. Most 401(k) plans let you invest in stocks, usually through stock mutual funds, index funds and target-date funds chosen by your employer. You can buy individual stocks only if your plan offers a self-directed brokerage window (or holds company stock). You decide how your money is invested; your employer only decides which options are on the menu.

This guide to investing with 401(k) funds explains what you can buy, how to change your investments, when a brokerage window makes sense, and the 2026 rules that affect how much you can put in.

Is a 401(k) Invested in the Stock Market?

A 401(k) is a tax-advantaged retirement account offered by an employer. The account itself isn’t a stock. It’s a container, and the money inside is invested in whatever options you select from your plan’s menu. If you pick a stock index fund, your 401(k) moves with the stock market. If you leave money in a stable value or money market fund, it barely moves at all.

That’s why two coworkers in the same plan can have completely different results. The difference is almost always their investment choices, not the account. If you’re new to how these accounts work, start with our guide on what a 401(k) is and how it works.

If you never chose any investments, your contributions most likely went into the plan’s default option. Under Department of Labor rules this is a qualified default investment alternative (QDIA), which in most plans is a target-date fund. Check your account to confirm.

Ways to Invest Your 401(k) in Stocks

Here are the stock-related options you’re most likely to see, from the most hands-off to the most hands-on.

Target-Date Funds

A target-date fund is named for the year you expect to retire, such as a 2055 or 2060 fund. It holds mostly stock funds when retirement is far away and gradually shifts toward bond funds as that year approaches. This gradual shift is called the glide path. The fund rebalances for you, so you don’t have to.

These funds are now the most common choice. Vanguard’s How America Saves 2026 preview found that 61% of participants in its plans held a single target-date fund in 2025. If you use one, don’t add a lot of other funds around it; that usually undoes the allocation the fund was built to keep.

Stock Index Funds

An index fund doesn’t try to beat the market. It buys the stocks in an index and aims to match its return, which keeps costs low. Common 401(k) examples include S&P 500, total U.S. stock market, small- and mid-cap, and international index funds.

Low cost matters over decades. According to S&P Dow Jones Indices’ SPIVA U.S. Year-End 2025 scorecard, 79% of actively managed U.S. large-cap funds trailed the S&P 500 in 2025. One year isn’t the whole story, but it’s a useful reminder to compare expense ratios before choosing an active fund.

Actively Managed Stock Funds

Many plans also offer growth, value, large-cap, mid-cap and small-cap funds run by professional managers. They can be reasonable choices, but they usually cost more than index funds. Your plan’s annual fee disclosure lists each fund’s expense ratio and past returns, so you can compare them side by side.

Company Stock

Some employers offer their own shares as an option or pay the match in company stock. This is the most common way people end up holding a single stock in a 401(k). The risk is that your paycheck and your retirement savings then depend on the same company. Many financial planners suggest keeping any single stock, including your employer’s, to a small share of your retirement money.

Bond and Stable Value Funds

These aren’t stock investments, but they matter when you decide how much to put in stocks. Bond funds and stable value funds usually rise and fall less than stock funds and grow more slowly over long periods. Most people’s mix includes more of them as retirement gets closer. See the comparison table further down.

Some plans also offer real estate funds. If you’re interested in that route, read how to invest your 401(k) in real estate.

Can You Buy Individual Stocks in a 401(k)?

Only if your plan has a self-directed brokerage window, or offers company stock. A brokerage window, sometimes called a self-directed brokerage account (SDBA), is a separate brokerage account connected to your 401(k). Through it you can buy investments that aren’t on the regular menu, such as individual stocks, ETFs and thousands of mutual funds. Fidelity’s version, for example, is called BrokerageLink.

Brokerage windows aren’t common. Vanguard reported that 21% of its full-service plan clients offered one in 2023, rising to 38% among plans with 5,000 or more participants, and only about 1% of participants with access actually used it.

How to Find Out if Your Plan Has a Brokerage Window

• Look for “brokerage,” “self-directed,” “SDBA” or a branded name like BrokerageLink in your plan website’s investment menu.
• Read your summary plan description or annual fee disclosure.
• Call the plan’s recordkeeper or ask HR. Only your employer can add a window; you can’t open one on your own.

Common Brokerage Window Rules and Costs

Every plan sets its own terms, so check yours. Typical rules include:

• Transfer limits: Some plans cap how much of your balance can move into the window.
• Restricted trades: Options, short selling, margin and very low-priced stocks are often not allowed.
• Extra costs: There may be an annual window fee, trading commissions or mutual fund transaction fees on top of fund expenses.
• Less oversight: Your employer doesn’t screen what’s available inside the window, so the fund-quality checks on the regular menu don’t apply.

Should You Pick Individual Stocks in Your 401(k)?

A brokerage window gives you more choice, but more choice brings more ways to go wrong. The main risks are concentration (a few stocks can fall sharply and not recover), overtrading, and paying higher fees. Vanguard’s own commentary on brokerage windows points to these same concerns.

A common middle ground is to keep your core retirement money in diversified funds and use the window, if at all, for a small portion you’re comfortable managing yourself. If you want to pick stocks and your plan has no window, you can do it in a separate brokerage account or an IRA instead.

How to Invest Your 401(k) in Stocks: Step by Step

1. Log in to your plan account. Use your recordkeeper’s website or app (for example Fidelity, Vanguard, Empower or Principal) and open the investments or portfolio section.
2. Review the fund menu. Note each fund’s type, expense ratio and what it holds. Look for a target-date fund for your retirement year and low-cost index funds.
3. Choose your approach. Pick one target-date fund, or build a mix of stock and bond funds that matches your time horizon and comfort with risk.
4. Change your future contributions. This setting (often called “future elections”) controls where new paycheck contributions go.
5. Move your existing balance. This is a separate step, often called an “exchange,” “transfer” or “rebalance.” Many people change future contributions and forget to move the money already in the account.
6. Confirm and save. Check the confirmation screen or email. Trades usually go through at the fund’s next closing price.
7. Review once or twice a year. Rebalance if your mix has drifted far from your target, and after big life changes. Checking daily tends to lead to reactive decisions.

Some plans limit frequent trading in and out of the same fund, so read your plan’s trading rules before making many changes.

How Much of Your 401(k) Should Be in Stocks?

There’s no single right percentage. It depends mainly on how many years you have until you’ll need the money and how much short-term loss you can live with without selling in a panic.

• Longer time horizon: People decades from retirement usually hold a large share in stocks, because they have time to recover from downturns.
• Nearing retirement: People within about 10 years of retiring usually move some money into bonds and stable value to reduce the risk of a big drop right before withdrawals begin.
• Rule of thumb: Some investors start from “110 minus your age” as a stock percentage. It’s a starting point, not a recommendation.

For context, 79% of contribution dollars in Vanguard-administered plans went into equities in 2025, largely because so many participants use target-date funds. Your target-date fund’s fact sheet shows its current stock-bond mix, which is a useful benchmark for your age.

Stocks vs. Bonds in a 401(k)

Most portfolios use both. Stocks do the heavy lifting early on; bonds cushion the portfolio as you get closer to spending the money.

Benefits and Risks of Investing Your 401(k) in Stocks

Benefits

• Long-term growth: Stocks have historically outpaced bonds and cash over long periods, which helps savings keep up with inflation.
• Tax-free trading inside the account: Selling one fund to buy another doesn’t create a capital gains bill, and dividends reinvest without yearly tax.
• Compounding: Reinvested earnings produce their own earnings over time.
• Your match gets invested too: Employer contributions grow alongside yours.

Risks

• Market drops: Stock funds can lose a large share of their value in a bad year, and recovery isn’t guaranteed on any schedule.
• Timing risk near retirement: A big decline just before you start withdrawals can hurt more than one early in your career.
• Concentration: Heavy holdings in company stock or a few individual stocks increase the chance of a large, lasting loss.
• Fees: Higher-cost funds and brokerage window charges reduce returns every year.

How Your Employer Match Is Invested

In most plans, the employer match is invested using the same elections you set for your own contributions, unless you choose a different allocation for it. A few plans pay the match in company stock.

Pay attention to vesting. Your own contributions are always yours, but employer contributions may vest over several years. If you leave before you’re fully vested, you can lose the unvested part of the match. The vested amount, including its investment growth, stays yours when you change jobs, and you can leave it in the plan, roll it to a new employer’s plan or roll it into an IRA.

2026 401(k) Contribution Limits

Source: IRS, IR-2025-111, November 13, 2025.

New for 2026: if your FICA wages from your employer were more than $150,000 in 2025, any catch-up contributions you make in 2026 must go in as Roth (after-tax) contributions. Your plan will explain how it handles this. To learn how plans handle hitting the cap, read do 401(k) contributions automatically stop at the limit?

What About Crypto and Private Equity in a 401(k)?

On March 30, 2026, the U.S. Department of Labor proposed a rule that would make it easier for plans to include alternative assets such as private equity, private credit and cryptocurrency. It sets out factors plan fiduciaries would weigh, including fees, liquidity, valuation and complexity. As of this update it’s a proposal, and your plan isn’t required to add these options. Check with your plan before assuming they’re available.

Should You Invest Through Your 401(k) or Buy Stocks on Your Own?

For many people, it’s both, in order. A common sequence is:

1. Contribute at least enough to your 401(k) to get the full employer match.
2. Consider an IRA for more investment choice. Compare the two in our Roth IRA vs. 401(k) guide.
3. Use a regular taxable brokerage account for individual stocks or money you may need before retirement.

A 401(k) offers tax advantages and possibly a match; a taxable brokerage account offers full flexibility and easier access, but no tax break on contributions. Keeping an emergency fund comes first; see why an emergency fund can matter more than your retirement account.

Common Mistakes to Avoid

• Leaving money in cash by accident. Check that contributions actually went into the funds you picked.
• Selling after a market drop. Selling turns a temporary decline into a permanent loss. Decide your mix in advance and stick to it unless your situation changes.
• Stacking a target-date fund with other funds. This makes your allocation hard to control.
• Ignoring fees. Compare expense ratios on your fee disclosure.
• Owning too much company stock. Diversify your retirement savings away from your employer.
• Cashing out when changing jobs. Early withdrawals are usually taxed and, before age 59½, often hit with a 10% penalty. See how to withdraw money from a 401(k) before retirement for the rules.

Frequently Asked Questions

Can I invest in stocks with my 401(k)?

Yes. Nearly every 401(k) plan offers stock investments, usually through stock mutual funds, index funds and target-date funds. You pick the funds and how much goes into each from your plan’s menu.

Can you buy individual stocks with a 401(k)?

Only if your plan offers a self-directed brokerage window or company stock. A brokerage window lets you buy individual stocks and ETFs outside the regular menu. Only your employer can add one, and it may come with extra fees and trading restrictions.

What is a 401(k) brokerage window?

It’s a brokerage account linked to your 401(k) that lets you invest in securities beyond the plan’s standard fund list, such as individual stocks, ETFs and outside mutual funds. The money keeps its 401(k) tax treatment.

Can I trade stocks in my 401(k) without paying taxes?

Yes. Buying and selling within a 401(k) doesn’t create capital gains tax. With a traditional 401(k), you pay income tax when you withdraw. Qualified Roth 401(k) withdrawals are tax-free.

What percentage of my 401(k) should be in stocks?

It depends on your time until retirement and your tolerance for losses. People decades away often hold mostly stocks and shift toward bonds as retirement nears. A target-date fund for your retirement year shows one professionally set mix you can compare against.

What is the safest investment in a 401(k)?

Stable value funds and money market funds usually have the least price movement, but they also grow the slowest and may not keep up with inflation over decades. “Safest” in the short term isn’t the same as best for long-term retirement savings.

Is my 401(k) tied to the stock market?

Only to the extent you hold stock funds. Your balance rises and falls with the market based on how much of your money is in stocks versus bonds or stable value.

How often can I change my 401(k) investments?

Most plans let you change allocations online at any time, but some limit frequent trades in the same fund. Many investors review their mix once or twice a year.

The Bottom Line

You can invest your 401(k) in stocks, and most people do so through low-cost index funds or a single target-date fund. Individual stocks are possible only through a brokerage window, which few plans offer and fewer participants use. Pick a mix that fits your timeline, keep fees low, capture your full match, and review your choices once or twice a year.

Want to see how you’re doing? Compare your savings with our guide on how much you should have in your 401(k) at 30.

Sources

• IRS, “401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500,” IR-2025-111, November 13, 2025. irs.gov
• Vanguard, How America Saves 2026 (25th edition) and preview, 2025 data, published 2026. vanguard.com
• Vanguard, “Determining the suitability of a brokerage option in a 401(k) plan,” April 2025. vanguard.com (PDF)
• S&P Dow Jones Indices, SPIVA U.S. Scorecard Year-End 2025. spglobal.com
• U.S. Department of Labor, proposed rule on alternative investments in 401(k) plans, March 30, 2026. dol.gov
• Fidelity, “Understanding new Roth 401(k) catch-up rules.” fidelity.com
• SEC / Investor.gov, “Beginners’ Guide to Asset Allocation, Diversification, and Rebalancing.” investor.gov

This article is for general education only and isn’t personalized investment, tax or legal advice. Plan rules vary; check your plan documents or speak with a qualified financial professional before making changes.