You can’t open a traditional 401(k) on your own, but if you have any self-employment income, you can open a solo 401(k), which gives you the same tax advantages and even higher contribution potential. Freelancers, independent contractors, sole proprietors, and small business owners without employees all qualify. If you have no self-employment income at all, a solo 401(k) isn’t available to you, but other tax-advantaged retirement accounts like a traditional or Roth IRA are.
Who Qualifies for a Solo 401(k)
A solo 401(k) is built for people who work for themselves and have no employees other than a spouse. Your business can take any legal form: sole proprietorship, LLC, corporation, or partnership. The key requirements are that you generate income from your own business and that the business is run by you alone or by you and your spouse. A couple running a business together qualifies.
The types of workers who typically fit include freelance writers, graphic designers, rideshare drivers, consultants, real estate agents, Etsy sellers, and anyone else who earns 1099 income or runs a small operation solo. You don’t need to be full-time self-employed. Even a side gig that produces net income can make you eligible, and you can have a solo 401(k) alongside a 401(k) at your day job (though combined contribution limits apply across all plans).
The moment you hire a full-time employee who isn’t your spouse, you no longer qualify for a solo 401(k). At that point, you’d need to convert to a standard employer-sponsored plan or use a different retirement account structure.
How Contributions Work
The solo 401(k) lets you contribute in two roles: as the employee and as the employer. This dual structure is what makes it so powerful for self-employed workers.
As the employee, you can defer up to $24,500 of your earnings in 2026, either pre-tax (reducing your taxable income now) or as Roth contributions (tax-free withdrawals in retirement). If you’re between 50 and 59, or older than 64, you can add a catch-up contribution of $8,000, bringing your employee side to $32,500. If you’re 60 to 63, the catch-up jumps to $11,250, for a total employee contribution of $35,750.
As the employer, you can add a profit-sharing contribution of up to 25% of your net self-employment compensation (that’s your earnings after deducting half of your self-employment tax). This employer piece stacks on top of the employee deferral. The combined maximum for both sides is $72,000 in 2026 if you’re under 50, or higher with catch-up contributions. The IRS caps the compensation used to calculate contributions at $360,000.
To put this in practical terms: if you earn $100,000 from freelancing, your net self-employment compensation after the self-employment tax deduction might be roughly $92,935. You could defer $24,500 as the employee, then add about $23,234 (25% of $92,935) as the employer, for a total around $47,734 sheltered from taxes in a single year. That’s significantly more than an IRA would allow.
How to Set One Up
Opening a solo 401(k) takes a few steps, but the process is simpler than setting up a full employer plan.
First, choose a brokerage or financial institution. Fidelity, Charles Schwab, and E*TRADE all offer solo 401(k) accounts with no setup fees and no annual maintenance fees. You’ll have access to a wide range of mutual funds, ETFs, and individual stocks. Some specialty providers like Rocket Dollar cater to people who want alternative investments (real estate, crypto), but charge significantly more: $600 to set up and $40 per month for their premium tier.
Next, complete the plan adoption paperwork. Your brokerage will provide a plan document that establishes the rules of your 401(k). You’ll need your business’s Employer Identification Number (EIN), which you can get for free from the IRS website in minutes if you don’t already have one. Sole proprietors without employees can sometimes use their Social Security number, but an EIN is better practice.
Once the account is open, you fund it through contributions from your business income. There’s no automatic payroll deduction like with an employer plan, so you’ll need to make transfers yourself, either as lump sums or on a schedule you set. Keep records of each contribution and whether it’s an employee deferral or employer profit-sharing contribution, since they follow different rules.
One administrative note: if your solo 401(k) balance exceeds $250,000 at the end of the plan year, you’re required to file Form 5500-EZ with the IRS annually. Below that threshold, there’s no filing requirement.
Solo 401(k) vs. Other Self-Employed Options
A solo 401(k) isn’t the only retirement account available to self-employed workers, but it typically offers the most flexibility.
A SEP IRA is the simplest alternative. There’s almost no paperwork, and employer contributions can reach up to 25% of compensation, with the same $72,000 cap in 2026. The catch is that a SEP IRA only allows employer contributions. There’s no employee deferral side, which means you’d need to earn roughly $288,000 in net compensation before you could max out a SEP IRA. With a solo 401(k), the employee deferral lets you shelter a much larger share of more modest income. If you earn $50,000, you could potentially contribute over $35,000 to a solo 401(k), while a SEP IRA would cap you at around $12,500.
A SIMPLE IRA allows employee deferrals, but the limit is lower: $17,000 in 2026, with a $3,500 catch-up for those 50 and older. The employer is also required to make matching or non-elective contributions. SIMPLE IRAs are more common in small businesses with a handful of employees, not solo operations.
A traditional or Roth IRA is available to anyone with earned income, regardless of employment status. But the annual contribution limit is far lower (well under $10,000), making it a supplement rather than a primary retirement vehicle for someone with meaningful self-employment income.
For most solo workers, the 401(k) wins on contribution room, Roth flexibility, and the ability to take loans from the account (if your plan document allows it). The tradeoff is slightly more paperwork and the need to file Form 5500-EZ once your balance grows.
What If You Have No Self-Employment Income
If you’re a W-2 employee whose employer doesn’t offer a 401(k), or if you’re between jobs, you can’t open any type of 401(k) on your own. The account is tied to a business, and without one, the IRS won’t allow it.
Your best options in this situation are a traditional IRA or Roth IRA, both of which you can open at any brokerage with no employer involvement. You won’t get the same contribution limits as a 401(k), but you’ll still benefit from tax-advantaged growth. If your employer offers no retirement plan, you can deduct traditional IRA contributions regardless of your income level, which makes them especially valuable.
If you’re earning any side income at all, even a few thousand dollars a year from freelance work or a small business, that’s enough to establish a solo 401(k) and start building retirement savings beyond what an IRA allows.