The best solo 401(k) provider for most self-employed people in 2026 is Fidelity, mainly because it charges no account or setup fees and still offers a Roth option. If you want to hold crypto, real estate, or private deals inside the plan, a specialist administrator like Carry or Rocket Dollar fits better.
By Alexander Reed · Reviewed for accuracy by the Finance Fundamentals editorial team
This article is educational, not personalized financial or tax advice. It’s written for a U.S. audience and reflects rules and provider terms available at the time of writing. Contribution limits and account terms change; confirm current IRS figures and provider fine print directly before you act, and talk to a CPA about your specific self-employment tax situation.
What Are You Actually Asking When You Ask for the “Best” One?
“Best solo 401(k) provider” isn’t really one question. It’s three questions wearing a trench coat.
Do you mean cheapest? Do you mean the one with the most investment choices? Or do you mean the one that won’t punish you with paperwork if you also want to buy a rental property inside the account? Each answer points somewhere different.
A freelance consultant with $60,000 in net self-employment income and a taste for index funds needs almost nothing beyond a free brokerage account. A former tech employee running a six-figure consultancy who wants to hold Bitcoin or a piece of a friend’s startup needs a specialist plan administrator, and will pay for that flexibility.
This guide sorts six real providers into both camps, tells you what each one actually costs, and walks through a worked example so you’re not guessing at the arithmetic.
A Quick Glossary Before the Jargon Piles Up
A few terms show up constantly in solo 401(k) shopping. Here’s what they mean, in plain terms.
- Elective deferral — the “employee” side of your contribution, capped by the IRS each year.
- Employer contribution — the “profit-sharing” side, based on your net self-employment earnings.
- Plan document — the legal paperwork that defines what your specific plan allows, including whether Roth, loans, or after-tax contributions are available.
- Mega backdoor Roth — a strategy of making after-tax contributions beyond the normal deferral limit, then converting them to Roth.
- Checkbook control — the ability to write checks or wire funds directly from the plan’s own bank account, common with self-directed providers.
How We Scored These Providers
Every option below was scored against the same five factors, in this order of weight.
Scoring criteria (heaviest weight first)
- Account and trading fees, including hidden ones like mutual fund transaction charges.
- Roth availability, since most self-employed savers want the option even if they don’t use it immediately.
- Investment breadth: index funds only, or also individual stocks, crypto, real estate, private deals?
- Administrative burden: how much paperwork you personally have to manage each year.
- Extra features, like participant loans or mega backdoor Roth support.
No provider wins on all five. That’s the point of a comparison, not a flaw in it.
The 2026 Solo 401(k) Contribution Ceiling, in Real Numbers
Before comparing providers, know what you’re actually allowed to put in. The IRS raised the elective deferral limit to $24,500 for 2026, up from $23,500 in 2025 (IRS, IR-2025-111, Nov. 13, 2025).
| Contribution piece | 2026 limit |
|---|---|
| Employee elective deferral | $24,500 |
| Catch-up, ages 50-59 and 64+ | $8,000 |
| Catch-up, ages 60-63 | $11,250 |
| Total ceiling, under 50 | $72,000 |
| Total ceiling, 50-59 and 64+ | $80,000 |
| Total ceiling, ages 60-63 | $83,250 |
Those combined totals include both your employee deferral and your employer (profit-sharing) contribution, since as a self-employed person you’re writing checks to yourself in both roles (IRS, Nov. 2025; Fidelity, “Solo 401(k) contribution limits 2025 and 2026,” fidelity.com, 2026; IRA Financial, “Solo 401(k) Contribution Limits for 2025 & 2026,” irafinancial.com, 2026).
2026 Solo 401(k) Ceiling by Age Group
| 2025 ceiling (under 50) | $70,000 | |
| 2026, under 50 | $72,000 | |
| 2026, ages 50-59 & 64+ | $80,000 | |
| 2026, ages 60-63 | $83,250 |
Source: IRS, IR-2025-111 (Nov. 13, 2025); Fidelity and IRA Financial, 2026, for combined totals. Red dashed bar is the 2025 baseline for comparison.
Solo 401(k) Providers Compared at a Glance
Here’s how the six providers stack up before you read the details on each one.
| Provider | Annual cost | Roth | Loans | Alt. assets |
|---|---|---|---|---|
| Fidelity | $0 | Yes | No | No |
| Schwab | $0 | Yes | No | No |
| E*TRADE | $0 | Yes | Yes | No |
| Carry | ~$299 | Yes | Yes | Yes |
| Rocket Dollar | ~$480+ | Yes | Yes | Yes |
| My Solo 401k Financial | ~$125/yr | Yes | Varies | Yes |
Figures per each provider’s own site and Carry’s 2026 provider comparison (carry.com); confirm current pricing directly before opening an account.
Provider Profiles: What Each One Is Actually Like to Use
Fidelity Self-Employed 401(k)
Best for: Freelancers and small business owners who want a no-fee, no-hassle account with solid fund choices and don’t need loans or alternative assets.
Fidelity charges no account fees, no setup fee, and has no minimum balance requirement. Stock and ETF trades are commission-free, and you can choose traditional or Roth contributions (Fidelity, “Self-Employed 401(k) Overview,” fidelity.com, 2026).
- Zero account and setup fees
- Roth contributions available
- Commission-free stock and ETF trades
- Wide fund lineup, including Fidelity’s own zero-expense-ratio index funds
The catches are real, though minor for most people. There’s no loan provision, and employer contributions sometimes have to go in by mailed check rather than an online transfer, depending on your setup (Carry, “Fidelity Solo 401k Features, Pricing, and Review,” carry.com, updated Feb. 17, 2026). Options trades run $0.65 per contract.
Verdict: For a solo operator who just wants low-cost index funds and a Roth bucket, Fidelity is hard to beat on price alone. If you need a loan feature or crypto exposure, look elsewhere.
Charles Schwab Individual 401(k)
Best for: Schwab loyalists who already bank and invest there and want everything under one login.
Schwab’s Individual 401(k) is also free to open with no annual fee, and it supports Roth contributions. Where Schwab gets interesting is the mega backdoor Roth: Schwab publishes guidance on the strategy, but the standard prototype plan doesn’t always include after-tax contributions by default (Schwab, “Mega Backdoor Roth Strategy,” schwab.com, accessed 2026).
Getting that feature usually means amending the plan document, sometimes with help from a third-party administrator. It’s doable. It’s just not automatic the way Fidelity’s Roth option is.
No participant loans are offered, and the investment menu leans toward Schwab’s own funds and a broad but not exhaustive third-party lineup.
Verdict: Solid and free, but the mega backdoor Roth path takes extra legwork most people underestimate.
E*TRADE Solo 401(k)
Best for: Self-employed savers who might actually need to borrow from their own retirement account someday.
E*TRADE charges no setup or maintenance fees and offers $0 commissions on online stock and ETF trades. What sets it apart is the loan feature: participants can borrow up to 50% of their account balance, capped at $50,000, repaid over five years at roughly the prime rate plus one percentage point (Carry, “E*TRADE Solo 401k Review,” carry.com, updated Feb. 17, 2026).
That loan option matters more than people expect. A self-employed person hit with a slow quarter has a way to access cash without an early-withdrawal penalty, as long as the loan gets repaid on schedule.
No mega backdoor Roth, and no direct access to real estate, crypto, or private equity within the plan.
Verdict: The clearest choice if a loan feature actually matters to your situation. Otherwise it’s a close cousin of Fidelity and Schwab.
Carry
Best for: Self-employed people who want alternative assets and a modern app, and don’t mind paying for it.
Carry is a specialist solo 401(k) administrator built around a digital-first experience. It charges roughly $299 a year (or about $29 a month) and supports Roth contributions, participant loans, and mega backdoor Roth conversions. Its Pro tier adds access to alternative assets, and Carry markets itself as offering integrated brokerage accounts rather than requiring a separate custodian (Carry, “Comparing the Best Solo 401k Plan Providers for 2026,” carry.com, 2026).
This is a real fee, not a rounding error, and it only makes sense if you’re using the features that justify it.
Verdict: Worth it if you want mega backdoor Roth or alternative assets without managing a separate custodian relationship yourself. Paying an annual fee for features you never use is money quietly leaking out of your retirement account.
Rocket Dollar
Best for: Investors who want real estate, crypto, or startup equity inside a retirement account and are comfortable with self-direction.
Rocket Dollar’s solo 401(k) supports Roth contributions and a wide range of alternative assets: rental property, fix-and-flip deals, cryptocurrency, angel investments, hard-money lending, and IRS-approved precious metals (Rocket Dollar, rocketdollar.com, accessed 2026). Participant loans are available up to the same 50%-of-balance or $50,000 cap common across providers.
Per Carry’s 2026 comparison, Rocket Dollar’s setup runs around $600 with a roughly $40 monthly fee, though Rocket Dollar’s own site doesn’t publish exact current pricing, so confirm the number directly before signing anything.
Verdict: A strong pick if alternative assets are the whole point. A poor pick if you just want index funds, since you’d be paying for flexibility you won’t use.
My Solo 401k Financial
Best for: Real estate investors and hands-on savers who want full checkbook control and don’t mind the paperwork.
My Solo 401k Financial (mysolo401k.net) is an administration-focused specialist rather than a brokerage. Per Carry’s 2026 comparison, it charges roughly $525 to set up plus about $125 a year, and it supports Roth contributions, mega backdoor Roth, and a broad menu of alternative assets. You typically open a separate bank account for the plan yourself, which gives you direct checkbook control but also more to manage.
This is the most hands-on option of the six. That’s a feature for some people and a burden for others.
Verdict: Built for people who already understand self-directed investing. Not the right starting point for a first-time solo 401(k) owner.
Who Each Provider Is Wrong For
Knowing who a provider is bad for is sometimes more useful than knowing who it’s good for.
| Provider | Wrong for… |
|---|---|
| Fidelity | Anyone who wants a plan loan or direct crypto/real estate exposure. |
| Schwab | Anyone who assumes mega backdoor Roth works out of the box. |
| E*TRADE | Anyone chasing alternative assets or mega backdoor Roth. |
| Carry | Anyone with a small balance who’d just index and never touch the extras. |
| Rocket Dollar | Anyone uncomfortable owning illiquid assets inside a retirement plan. |
| My Solo 401k Financial | First-time plan owners who want a plug-and-play brokerage experience. |
What Opening One Actually Involves
The paperwork is lighter than people expect, but the order of operations matters.
- Confirm you have net self-employment income, whether through a sole proprietorship, an LLC, or a small S-corp.
- Get an EIN for the plan if your provider requires one, separate from any EIN your business already uses.
- Adopt the provider’s plan document and open the brokerage or plan bank account.
- Fund it before your tax filing deadline, including extensions, for it to count for that tax year.
- Set a yearly reminder to recalculate your employer contribution once you know your actual net income.
- If you’re carrying an old 401(k) or traditional IRA from a previous job, ask your new provider whether it accepts incoming rollovers before you open the account.
Most of the free brokerages let you finish steps one through three online in under thirty minutes. The specialist providers usually involve a short onboarding call, since they’re setting up a plan document that’s more customized than an off-the-shelf template.
How to Actually Choose: A Worked Example
Numbers make this easier than opinions do.
Worked example: Dana, freelance UX consultant, age 42
Dana nets $95,000 in self-employment income for 2026 after business expenses. She wants to save aggressively, has no interest in crypto or real estate, and just wants low fees and simple index funds.
Rough employer contribution room (roughly 20% of net self-employment earnings after the self-employment tax adjustment) works out to about $17,700. Add her employee deferral of up to $24,500, and Dana could plausibly contribute somewhere around $42,000 for the year, well under the $72,000 combined ceiling.
Since Dana has no need for loans or alternative assets, a $299 annual fee at a specialist provider buys her nothing she’d use. Fidelity or Schwab, at $0 a year, keeps more of that $42,000 actually invested.
This is usually the wrong call: paying a specialist’s annual fee “just in case” you might want alternative assets someday. If you’re not using the feature within the first year, you’re renting flexibility you don’t need.
Now flip the example. If Dana instead wanted to buy a duplex inside her retirement plan, the calculus reverses completely, and Rocket Dollar or My Solo 401k Financial becomes the only realistic path, fee or not.
Second example: Marcus, independent contractor, age 61
Marcus nets $140,000 in 2026 and falls in the ages-60-63 catch-up window, so his combined ceiling is $83,250 instead of the standard $72,000.
He can defer $24,500 as an employee, add the $11,250 catch-up, and still have room for roughly $47,500 in employer contributions before hitting the cap. Because he’s close to retirement and holds no interest in alternative assets, a free brokerage keeps every dollar of that room working instead of covering someone else’s annual fee.
Mistakes That Cost Solo 401(k) Owners Real Money
A few mistakes show up again and again with self-directed retirement accounts, and they’re rarely about picking the “wrong” brand.
Common red flags to watch for
- Missing the plan-establishment deadline. A solo 401(k) generally has to be opened by your business’s tax filing deadline (including extensions) for the tax year you want it to count for, per IRS guidance.
- Assuming every provider allows Roth by default. Some plan documents need amending first.
- Confusing “no account fee” with “no fees at all.” Trading costs, transaction fees on certain funds, and options contract fees still apply.
- Forgetting the deferral limit is per person, not per plan, if you also participate in a W-2 employer’s 401(k) in the same year.
- Triggering prohibited transaction rules with self-directed real estate, such as personally using a property the plan owns.
That last one is the expensive one. A prohibited transaction can disqualify the entire plan, not just the specific investment.
What Experienced Self-Employed Savers Do Differently
People who’ve run a solo 401(k) for years tend to do a few things that beginners skip.
They separate the plan’s brokerage account from their personal accounts by a wide margin, even when it’s not strictly required, just to keep bookkeeping clean at tax time. They also recalculate their maximum employer contribution every year instead of guessing, since net self-employment income moves and the profit-sharing formula moves with it.
A smaller group splits contributions across two providers entirely: a free brokerage for the bulk of the balance in index funds, and a specialist administrator holding only the alternative-asset slice. It costs more in total fees, but it keeps the cheap money cheap.
Experienced owners also revisit the Roth-versus-traditional split every year, not just once at setup, because their income and tax bracket keep changing. That’s a discipline most first-year owners don’t build in.
Consolidation is another habit that shows up among people who’ve done this a while. Rather than leaving an old employer 401(k) sitting untouched at a former job’s provider, many roll it directly into the solo 401(k) once it’s open, which cuts down on the number of statements to track and simplifies required minimum distribution math decades later. Fidelity, Schwab, and E*TRADE all generally accept these rollovers; the specialist administrators handle them too, but expect an extra form or two.
Key Takeaways
- Fidelity is the strongest default pick for low fees and simplicity, with a genuine Roth option and no minimum balance.
- E*TRADE stands out if a plan loan feature actually matters to your situation.
- Carry, Rocket Dollar, and My Solo 401k Financial charge real annual fees, but they’re the only realistic path to crypto, real estate, or mega backdoor Roth.
- The 2026 combined contribution ceiling is $72,000 under 50, $80,000 for ages 50-59 and 64+, and $83,250 for ages 60-63.
- Match the provider to what you’ll actually use in year one, not what sounds impressive.
Frequently Asked Questions
What’s the best solo 401(k) provider overall?
For most self-employed people who want low fees and simple index investing, Fidelity is the strongest overall pick. If you need alternative assets or a mega backdoor Roth, a specialist provider like Carry or Rocket Dollar fits better, even with the added cost.
How much can I contribute to a solo 401(k) in 2026?
The combined employee-plus-employer ceiling is $72,000 for savers under 50, $80,000 for ages 50-59 and 64+, and $83,250 for ages 60-63, per IRS guidance issued in November 2025.
Can I open a solo 401(k) if I also have a W-2 job with a 401(k)?
Yes, as long as you have self-employment income, but your total elective deferral across both plans is still capped at the single-person limit. Only the employer contribution side is separate for each plan.
Do I need an LLC to open a solo 401(k)?
No. Any self-employed person with net business income, including sole proprietors filing a Schedule C, can generally open one. An LLC isn’t required, though many people set one up for liability reasons unrelated to the retirement account itself.
Is a solo 401(k) better than a SEP IRA?
For most solo business owners, yes, mainly because a solo 401(k) allows the employee deferral on top of the employer contribution, which usually lets you save more at moderate income levels than a SEP IRA alone.
Can I borrow money from my solo 401(k)?
Only if your provider’s plan document allows loans. E*TRADE and several specialist administrators support this; Fidelity and Schwab generally do not.
Can I roll over an old 401(k) or IRA into a solo 401(k)?
Usually, yes. Fidelity, Schwab, and E*TRADE generally accept rollovers from a former employer’s 401(k) or a traditional IRA, and the specialist administrators support this too, though it may take an extra form. Confirm the exact process with your chosen provider before initiating a transfer.
Where to Go From Here
Read your actual plan document before you fund anything, not just the marketing page. That single habit catches most of the surprises in this article before they cost you money.
If you’re deciding between the free brokerages, open the one where you already bank; the account interface will feel less like homework. If you’re weighing a specialist administrator, call them and ask exactly which fees apply to your specific asset plans, in writing.
Pairing a solo 401(k) with a Roth IRA is common once the 401(k) is maxed out, since IRA contribution limits sit completely separate from the 401(k) ceiling.
References
- Internal Revenue Service, “401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500” (IR-2025-111), irs.gov, Nov. 13, 2025.
- Fidelity Investments, “Self-Employed 401(k) Overview,” fidelity.com, accessed 2026.
- Fidelity Investments, “Solo 401(k) contribution limits 2025 and 2026,” fidelity.com, 2026.
- Charles Schwab, “Mega Backdoor Roth Strategy,” schwab.com, accessed 2026.
- Carry, “Fidelity Solo 401k Features, Pricing, and Review (2026 Update),” carry.com, updated Feb. 17, 2026.
- Carry, “E*TRADE Solo 401k Review,” carry.com, updated Feb. 17, 2026.
- Carry, “Comparing the Best Solo 401k Plan Providers for 2026,” carry.com, 2026.
- Rocket Dollar, “Solo 401(k),” rocketdollar.com, accessed 2026.
- My Solo 401k Financial, mysolo401k.net, accessed 2026.
- IRA Financial, “Solo 401(k) Contribution Limits for 2025 & 2026,” irafinancial.com, 2026.
