Retirement Accounts for the Self-Employed: SEP-IRA vs Solo 401k vs Roth
Written by Morgan Reed, Founder of My1099Calculator
Last updated: 7/2026 · Reviewed for accuracy against current IRS guidelines
Most freelancers assume they lost something valuable when they left a W2 job: the employer 401k. In reality, the self-employed have access to retirement accounts that can shelter far more money from taxes than almost any corporate plan offers. The catch is nobody hands you a benefits packet explaining it. This guide breaks down your three real options and how to combine them.
Why Freelancers Actually Have the Better Deal
A typical W2 employee is capped at contributing $23,500 to a 401k in 2026, plus whatever their employer matches. A self-employed person, by contrast, can act as both employee and employer inside their own retirement plan. That dual role is what unlocks dramatically higher contribution ceilings. A freelancer earning a solid income can often shelter two to three times what an equivalent salaried employee can, all while lowering this year's tax bill in the process.
Solo 401k: The Power Player
A Solo 401k (also called an individual 401k) is built for business owners with no employees other than a spouse. It lets you contribute in two capacities:
- As the "employee": up to $23,500 in 2026, or $31,000 if you are 50 or older.
- As the "employer": an additional profit-sharing contribution of up to 25% of net self-employment earnings.
- Combined cap: $70,000 for 2026 ($77,500 with catch-up).
The Solo 401k shines for freelancers with moderate to high income who want to maximize contributions without needing enormous net profit, because the employee portion is a flat dollar figure available regardless of how big your profit is. It does require a bit more paperwork to establish, and once your account balance exceeds $250,000 you must file a short annual Form 5500-EZ.
SEP-IRA: The Simplicity Champion
A SEP-IRA lets you contribute up to 25% of net self-employment earnings, capped at $70,000 for 2026. Unlike the Solo 401k, there is no separate "employee" contribution — it's a single employer-style contribution based purely on a percentage of profit. That makes the math simpler but the ceiling lower for freelancers with smaller net profit, since you don't get the flat employee-contribution boost.
The tradeoff is setup speed and zero ongoing filing. You can open a SEP-IRA online in fifteen minutes at any major brokerage, and there is never a Form 5500 to file, no matter the balance. For freelancers who want maximum simplicity, SEP-IRA remains the default choice.
Traditional and Roth IRA: The Supporting Player
A Traditional or Roth IRA has a much smaller 2026 limit of $7,000 ($8,000 if 50+), but it plays a useful supporting role alongside a SEP-IRA or Solo 401k. Traditional IRA contributions may be tax-deductible depending on income and whether you're covered by another retirement plan. Roth IRA contributions are never deductible, but qualified withdrawals in retirement are entirely tax-free — and Roth IRAs phase out at higher incomes (roughly $161,000 for single filers in 2026, $240,000 for married filing jointly).
Because the contribution ceiling is so much lower than a SEP-IRA or Solo 401k, most freelancers use an IRA as an add-on once their primary plan is funded, not as their main retirement vehicle.
Side-by-Side Comparison
| Feature | Solo 401k | SEP-IRA | Roth/Traditional IRA |
|---|---|---|---|
| 2026 limit | Up to $70,000 | Up to $70,000 (25% of profit) | $7,000 |
| Deadline to open | Dec 31 of tax year | Filing deadline + extensions | Filing deadline |
| Complexity | Moderate | Very low | Very low |
| Best for | Maximizing at lower income | Simplicity, high profit | Supplementing a main plan |
Worked Example: $90,000 Net Profit
Comparing the ceilings
A freelancer with $90,000 net profit could contribute roughly $18,000 under a SEP-IRA (about 20% effective rate after self-employment tax adjustments), but as much as $41,500 under a Solo 401k — the $23,500 flat employee contribution plus roughly $18,000 in employer profit-sharing. Adding a $7,000 Roth IRA on top could push total shelter above $48,000 in the same year.
The Tax Savings Math
Every pre-tax dollar contributed reduces your taxable income immediately. In the 24% federal bracket, a $20,000 Solo 401k or SEP-IRA contribution saves roughly $4,800 in federal tax alone, plus state tax savings and no change to the self-employment tax portion. That is real cash staying in your pocket this April, not just a future retirement number.
Roth vs Pre-Tax: A Decision Framework
Choose pre-tax (Traditional/SEP/Solo 401k) in high-income years when you want to lower this year's tax bill the most. Choose Roth in lower-income years, or when you expect your tax rate to rise in retirement, since Roth withdrawals are tax-free later. Freelancers with volatile income often use both: pre-tax contributions in strong years, Roth contributions in slower years.
How to Open Each Account
A SEP-IRA or Roth/Traditional IRA can be opened online in about fifteen minutes at Fidelity, Vanguard, or Schwab with no fees. A Solo 401k takes a bit longer — typically a day or two — since the brokerage must generate a plan document before you can fund the account. Start the Solo 401k paperwork early in the year if you want the option available by December.
Combining Accounts: The Solo 401k Plus Roth IRA Strategy
A popular approach for growing freelance businesses is maxing the Solo 401k for its larger pre-tax shelter, then adding a Roth IRA contribution on top for tax-free growth diversification. This gives you both a large current-year deduction and a pool of money that will never be taxed again, hedging against uncertainty about future tax rates.
Sources: IRS Publication 560 (Retirement Plans for Small Business)