As a freelancer with no employer plan, which solo 401(k) provider offers the easiest setup and lowest fees for index-fund investing?

For a freelancer who wants easy setup + essentially zero ongoing fees + broad index-fund investing, my pick is Fidelity Investments.

My ranking

Why Fidelity wins: its Self-Employed 401(k) has no account fees or minimums, and Fidelity says you can open it for an owner-only business (plus spouse). It supports both traditional and Roth contributions.

For the investments themselves, Fidelity is particularly attractive. Its ZERO funds—including FZROX (Total Market) and FZILX (International)—have 0% expense ratios and no investment minimums.

So a very simple portfolio could be:

• FZROX — U.S. total stock market
• FZILX — international stocks
• A low-cost bond index fund if you want a bond allocation

Fidelity also charges $0 for online U.S. stock and ETF trades.

When I'd choose E*TRADE instead

E*TRADE is a strong alternative if participant loans matter to you. It also has $0-fee index funds, including total-market and international funds.

One important caveat

The cheapest provider isn't necessarily the best Solo 401(k) if you need advanced features such as after-tax contributions/mega-backdoor Roth, specialized plan provisions, or certain loan features. The free brokerage plans can be more limited than custom Solo 401(k) plans.

Bottom line: If you're simply a self-employed freelancer thinking, “I want to open a Solo 401(k), contribute as much as I'm eligible for, and buy broad index funds without paying an administrator every year,” I'd start with Fidelity.

If you tell me whether you're a sole proprietor/1099, single-member LLC, or S-corp, I can also show you exactly how much you can contribute in 2026 and whether Roth or traditional contributions make more sense.

For index-fund investing as a freelancer, the big mainstream discount brokerages—Fidelity and E*TRADE (by Morgan Stanley)—stand out as the top choices. They both charge $0 setup fees, $0 annual maintenance fees , and $0 commissions on online stock and ETF trades.

Because Vanguard exited the Solo 401(k) space, Fidelity and E*TRADE have effectively become the default standard. The "easiest" choice depends on a couple of specific account features you might need.

Top Free Solo 401(k) Providers Compared

• Fidelity Investments (Fidelity Solo 401(k))
  • Best For: Overall ease of use and long-term holding.
  • Fees: $0 account fees, $0 trade commissions for online US stocks/ETFs.
  • Index Funds: Perfect for buying Fidelity’s zero-fee index funds (like FZROX) or low-cost iShares/Fidelity ETFs with no transaction costs.
  • The Catch: Fidelity’s standard prototype Solo 401(k) does not allow participant loans [1.1.2 style limitation applies to standard basic brokerages] or voluntary after-tax contributions (Mega Backdoor Roth).
• E*TRADE (E*TRADE Solo 401(k))
  • Best For: Account flexibility and built-in loan options.
  • Fees: $0 setup, $0 annual fees, and $0 online stock/ETF commissions.
  • Index Funds: Excellent access to a broad selection of low-cost ETFs and mutual funds.
  • The Catch: Like Fidelity, their basic free plan doesn't support the "Mega Backdoor Roth" (voluntary after-tax sub-accounts), but unlike Fidelity, E*TRADE does allow participant loans (up to 50% of your balance or $50,000).
• Charles Schwab (Charles Schwab Solo 401(k))
  • Best For: Low-fee traditional/Roth broker investing.
  • Fees: $0 setup and annual fees.
  • The Catch: Schwab offers a great platform, but their standard plan doesn't allow participant loans either, and the paperwork can occasionally feel slightly more rigid than Fidelity’s streamlined interface.

Which one should you pick?

• Go with Fidelity if you want the absolute cleanest, most streamlined digital setup and plan to strictly buy-and-hold low-cost index funds or Fidelity’s zero-fee funds without needing to borrow from your account.
• Go with E*TRADE if there is any chance you might want the safety net of being able to take a participant loan from your retirement account down the road.

(Note: If you ever need advanced features like alternative asset investing—such as real estate—or a "Mega Backdoor Roth," free brokerages won't cut it, and you'd have to pay a specialized third-party provider like My Solo 401k Financial or Rocket Dollar. For basic index fund investing, stick to Fidelity or E TRADE.)*

To help narrow down the exact fit, tell me:

• Do you anticipate needing the ability to take a loan from your 401(k) in an emergency?
• Are you looking to contribute Roth dollars, Traditional pre-tax dollars , or both?

For a freelancer looking for a straightforward, zero-fee setup to invest in low-cost index funds, the top traditional brokerage firms stand out. Since Vanguard exited the individual/solo 401(k) space (transferring accounts to Ascensus), the clear frontrunners for "easiest setup + lowest fees" are Fidelity, E*TRADE , and Charles Schwab.

The best options on the market for index-fund-focused solo 401(k)s break down as follows:

• 1. Fidelity Investments
  • Setup & Ease: Widely ranked as the best overall provider. The application process for a Fidelity Solo 401(k) is handled entirely online with digital paperwork, though you will need your EIN (Employer Identification Number) for your freelance business.
  • Fees: $0 annual account maintenance fees and $0 commission for online U.S. stock and ETF trades.
  • Index Investing Perks: Excellent access to low-cost iShares/Fidelity ETFs, or you can utilize Fidelity's zero-expense-ratio index mutual funds (like FZROX). It also permits plan loans if you ever need short-term liquidity.
• 1. E*TRADE
  • Setup & Ease: Very strong runner-up with an intuitive digital application. E*TRADE is frequently praised by self-employed individuals for having robust account features and smooth ongoing administration.
  • Fees: $0 setup fees, $0 annual maintenance fees, and $0 commissions on online stock and ETF trades.
  • Index Investing Perks: Great screening tools and a massive library of commission-free mutual funds and ETFs. It also allows 401(k) loans.
• 1. Charles Schwab
  • Setup & Ease: Highly reputable for low-cost investing, though their physical paperwork submission or processing can occasionally feel a step less streamlined than Fidelity's fully digital onboarding.
  • Fees: $0 platform or maintenance fees and $0 online equity/ETF commissions.
  • Index Investing Perks: Terrific access to Schwab’s proprietary ultra-low-cost index mutual funds and broad ETFs.

Why Avoid "Self-Directed" Boutique Solo 401(k) Providers?

If you just want to buy standard index funds (like an S&P 500 or total market index), avoid specialized boutique Solo 401(k) providers (which charge $500 to $1,500+ in setup and annual administrative fees). Those specialized custodian-heavy plans are meant for freelancers who want to buy alternative assets like physical real estate, crypto, or private equity inside a checkbook-control LLC. For basic index fund investing, a free brokerage account at Fidelity or E*TRADE is vastly cheaper and simpler.

To help narrow down the best fit, tell me:

• Do you already have an EIN for your freelance business?
• Do you prefer mutual funds or ETFs for your index investing?

If your priorities are (1) easiest setup, (2) lowest ongoing fees, and (3) straightforward index-fund investing, my pick is Fidelity’s Self-Employed 401(k).

Best overall: Fidelity

• $0 account fees and no investment minimum.
• Supports both traditional and Roth 401(k) contributions.
• You can invest in Fidelity's extremely inexpensive index funds, including FZROX (0% expense ratio) and FZILX (0%), with no investment minimums.
• Fidelity's standard index funds are also exceptionally cheap: for example, FSKAX is currently 0.015%.
• For 2026, Fidelity says the self-employed 401(k) permits up to $72,000 in combined employee/employer contributions before catch-up contributions.

Why I'd choose it: You don't need a third-party administrator just to get a basic solo 401(k) invested in low-cost index funds. The combination of no plan fee, no minimum, easy online access, and Fidelity's unusually cheap index funds is hard to beat.

Runner-up: E*TRADE

E*TRADE is also attractive, particularly because it offers traditional and Roth Individual 401(k)s and a broad selection of mutual funds, ETFs and stocks. us.etrade.com It now has several 0%-expense-ratio index funds, including total-market and international funds.

I'd still give Fidelity the edge for a freelancer who wants a set-it-and-forget-it index portfolio.

Schwab

Schwab's index ETFs are excellent—several broad-market ETFs have expense ratios around 0.03%. www.schwab.com But if you're specifically looking for the simplest solo-401(k) + index-fund combination, Fidelity's 0%-expense-ratio mutual funds give it an advantage.

My ranking

Bottom line: For a one-person freelance business, I'd open the Fidelity Self-Employed 401(k) and use a simple three-fund-style portfolio (U.S. total market + international + bonds), unless you have a specific reason to favor another provider.

One important caveat: “easiest” can depend on whether you need Roth contributions, participant loans, or special plan features. Also, once your solo 401(k) gets large enough, IRS reporting requirements can kick in. If you tell me roughly how much you expect to contribute per year and whether you want Roth, I can compare Fidelity vs. E*TRADE vs. Schwab specifically for your situation. 

For a freelancer seeking zero account fees, $0 trade commissions , and a streamlined setup strictly for standard index-fund investing (stocks, bonds, and ETFs), the clear frontrunners are Fidelity Investments and Charles Schwab.

(Note: Vanguard—historically a major player—exited the individual 401(k) market by transitioning its accounts to Ascensus, making traditional brokerage houses a smoother and cheaper choice.)

Here is how the top traditional providers stack up for index-fund investors:

• Fidelity Investments (Top Pick for Overall Ease & Value)
  • Setup & Fees: $0 setup fee, $0 annual maintenance fee, and $0 online commissions for U.S. stocks and ETFs.
  • Index Funds: Excellent access to ultra-low-cost index funds, including their signature zero-expense-ratio funds (like FZROX) or standard broad-market index funds like the Fidelity 500 Index Fund (FXAIX) with an expense ratio of just 0.015%.
  • Why it’s easy: The application process can be done entirely online with minimal paperwork, and customer service reps familiar with self-employed accounts can walk you through the EIN/Participant setup if needed.
• Charles Schwab (Best Alternative for Low-Cost Choices)
  • Setup & Fees: $0 setup fee, $0 annual maintenance fee, and $0 commissions on online stock and ETF trades.
  • Index Funds: Terrific selection of low-cost Schwab index mutual funds and ETFs (such as SWPPX for the S&P 500) with expense ratios matching the industry lows.
  • Why it’s easy: Schwab's platform is clean, and like Fidelity, they don't nickel-and-diming you with hidden administrative costs.
• E*TRADE (Runner-up for Feature Flexibility)
  • Setup & Fees: $0 setup and annual fees, with $0 commissions on standard stocks and ETFs.
  • Index Funds: Great platform, though their interface leans slightly more toward active trading. E*TRADE also supports incoming participant loan features and Roth Solo 401(k) options seamlessly if you want those features down the road.

What to Avoid

Avoid "boutique" Solo 401(k) providers (which charge setup fees of $300 - $600 plus annual maintenance fees) unless you plan to buy alternative assets like physical real estate, tax liens, or private equity via a Checkbook LLC. If your goal is purely low-cost index-fund investing through standard broad-market ETFs or mutual funds, a free brokerage account via Fidelity Investments or Charles Schwab is all you need.

To help narrow down the choice, do you plan to make Roth contributions (after-tax dollars growing tax-free) in addition to Traditional pre-tax contributions , or do you need the ability to take participant loans from your account?

For a freelancer who wants a Solo 401(k) mainly for low-cost, buy-and-hold index funds, my pick is Fidelity Investments.

My ranking

Fidelity's Self-Employed 401(k) has no account fees or investment minimums, and Fidelity explicitly supports both traditional and Roth contributions. Fidelity Fidelity Its online U.S. stock and ETF trades are $0, and it offers its own ZERO expense-ratio index funds.

Why I'd choose Fidelity

If your investment strategy is something like total U.S. stock market + international + bonds, Fidelity is unusually hard to beat:

• $0 Solo 401(k) account fees
• $0 minimum to open
• $0 online ETF trades
• Access to broad, low-cost index ETFs and mutual funds
• Fidelity's ZERO index funds have 0% expense ratios
• Traditional and Roth Solo 401(k) contributions are supported.

For comparison, Schwab also has $0 online ETF commissions and thousands of commission-free ETFs, so its investment costs are similarly competitive.

One important caveat: "lowest fees" isn't quite the same as "best Solo 401(k)." Fidelity's standard plan has fewer advanced features than some custom Solo 401(k) arrangements—for example, participant loans and certain after-tax contribution strategies can require a different plan design. If you don't need those features, I wouldn't pay extra for a custom administrator.

Bottom line: For a typical one-person freelance business seeking easy setup + $0 plan fees + low-cost index investing, I'd open the Fidelity Self-Employed 401(k).

If you tell me roughly how much you expect to contribute per year and whether you're a sole proprietor/LLC or S-corp, I can also compare Fidelity vs. Schwab vs. E*TRADE specifically for your situation, including the 2026 contribution mechanics.

For a freelancer focused strictly on index-fund investing (ETFs or broad-market mutual funds) who wants a $0 setup fee and $0 ongoing maintenance , the top traditional brokerages tie for first place.

The best free, low-fee providers for index-fund investing break down as follows:

• Fidelity Investments : Widely considered the best overall for user experience and digital onboarding . It features $0 setup, $0 annual fees, and $0 online trades for U.S. stocks and ETFs. It offers access to thousands of no-transaction-fee mutual funds. (Note: Fidelity's Solo 401(k) does not permit plan loans).
• Charles Schwab : Excellent for low-cost investing with $0 account opening, $0 maintenance fees, and $0 trades on stocks, ETFs, and Schwab mutual funds. Setup is robust, though historically a bit more paper-heavy than Fidelity's digital workflow. (Note: Schwab's plan also does not support participant loans).
• E*TRADE : A strong alternative if you specifically want the ability to take a loan from your Solo 401(k). E*TRADE charges $0 setup or ongoing maintenance fees and provides robust, commission-free ETF and stock trading.

Why Avoid "Paid" Custom/Self-Directed Providers?

Boutique or specialized Solo 401(k) providers (like checkbook-control LLC packagers) often charge $500 to $1,500 upfront plus annual maintenance fees. You only need those if you plan to invest in alternative assets like real estate, crypto, or private equity. For plain-vanilla index funds and ETFs, free major brokerages are vastly superior.

If you can let me know whether you might need a loan feature from your account or prefer a specific platform like Fidelity or Schwab , I can help you outline the exact steps to initiate the setup.

For a freelancer who wants simple setup, $0 ongoing account fees, and low-cost index-fund investing, my pick is Fidelity’s Self-Employed 401(k).

My ranking

Why Fidelity wins: its self-employed 401(k) has no account fees or minimum to open, and Fidelity offers $0 online ETF trades plus a particularly strong selection of low-cost index funds—including its ZERO index funds with no expense ratio.

Schwab is essentially tied on cost. Its Individual 401(k) also has $0 opening and maintenance fees and $0 minimums, with broad access to ETFs and mutual funds. The main reason I'd choose Fidelity is the combination of straightforward setup and its exceptionally good index-fund lineup.

What I'd do in your shoes

If you're a sole proprietor/1099 freelancer with no employees other than possibly a spouse, I'd open a Fidelity solo 401(k), then use a simple three-fund-style allocation such as:

• U.S. total stock market index
• International total stock market index
• U.S. bond index (if you want bonds)

You don't need to pay a specialized solo-401(k) company hundreds of dollars a year just to get diversified index-fund exposure. Fidelity, Schwab, and E*TRADE all offer $0-cost standard plans.

One important wrinkle: the provider's fee isn't the same thing as the investment's expense ratio. A $0-fee 401(k) can still contain expensive funds, so I'd specifically select broad index ETFs/mutual funds with very low expense ratios.

Also, in 2026 the employee contribution limit is $24,500, with an additional employer contribution based on your self-employment compensation; the overall annual additions limit is generally $72,000 before applicable catch-ups.

Bottom line: Fidelity is the easiest default choice for a freelancer who wants a low-maintenance, low-cost solo 401(k) and plans to buy broad index funds. Schwab would be my second choice.

If you tell me roughly how much freelance profit you expect ($50k, $100k, $200k, etc.) and whether you're a sole proprietor or S-corp, I can also show you exactly how much you could contribute in 2026 and which Fidelity index funds I'd use.

For a freelancer with no employees other than possibly a spouse, my pick today is Fidelity’s Self-Employed 401(k). It combines very low ongoing costs with what is probably the easiest setup among the major low-cost brokerages.

My ranking

Why Fidelity wins: Fidelity explicitly offers online account opening, including the plan application and adoption agreement, whereas Schwab's current process requires completing and returning an account application plus adoption agreement.

Fidelity also charges no account fees or minimums for its Self-Employed 401(k), and online U.S. stock/ETF trades are $0. www.fidelity.comwww.fidelity.com Its index-fund lineup is particularly attractive: Fidelity has several ZERO funds with 0% expense ratios, including total-market-style and international index options.

E*TRADE is a close second. Its Individual 401(k) supports both traditional and Roth contributions, and offers $0 stock/ETF/mutual-fund trades. It also now has its own no-fee index funds.

I wouldn't choose Vanguard purely for low fees anymore. Its Individual 401(k) charges $20 per Vanguard mutual fund in each account, although the fee is waived if you have at least $50,000 in qualifying Vanguard assets.

What I'd do

If your goal is simply "open a Solo 401(k), contribute as much as I'm allowed, and buy broad index funds", I'd use Fidelity and keep the portfolio simple—for example, a total-U.S.-stock index fund plus an international index fund, with bonds added according to your risk tolerance.

One important caveat: provider fees aren't the whole story. If you want features such as participant loans, mega-backdoor Roth contributions, Roth employer contributions, or more sophisticated plan administration, the "best" provider can change.

For 2026, Fidelity says its Self-Employed 401(k) allows combined employee/employer contributions of up to $72,000, subject to the applicable rules and your business income.

Bottom line: Fidelity is the best combination of easiest setup + $0 account fees + excellent index-fund choices for a typical one-person freelance business.

For a freelancer looking for the easiest setup and lowest fees for index-fund investing, Fidelity Investments and Charles Schwab stand out as the top choices, both offering $0 setup fees, $0 annual maintenance fees, and $0 commission on online stock, ETF, and index-fund trades. Both brokerages allow you to invest as both employer and employee up to the maximum contribution limits (which reach $72,000 for the 2026 tax year, excluding catch-up contributions).

Top Low-Fee Providers at a Glance

Comparing Fidelity and Charles Schwab

• Fidelity Self-Employed 401(k): Highly rated for overall ease of use, it features zero recurring plan fees and streamlined digital forms. It gives you access to Fidelity’s proprietary low-cost index funds and thousands of no-transaction-fee third-party mutual funds.
• Charles Schwab Individual 401(k): Excellent for strict fee-conscious index investors. Schwab charges no account opening or maintenance fees and offers commission-free online trading for stocks, ETFs, and thousands of no-load mutual funds.

Important Setup Considerations

• EIN Requirement: You must have an Employer Identification Number (EIN) for your freelance business before applying, as a social security number alone is insufficient for a Solo 401(k).
• Form 5500-EZ: Keep in mind that once your total Solo 401(k) plan assets exceed $250,000 , you are legally required to file IRS Form 5500-EZ annually, regardless of which free provider you choose.

If you can share your approximate annual freelance net income or whether you prefer Roth versus traditional pre-tax contributions , I can help you figure out your precise maximum contribution limits for the year.