Solo 401(k) vs SEP IRA for Freelancers in 2026: Which Saves You More?

If you freelance full-time and have not opened a retirement account yet, you are leaving thousands of dollars on the table every single year. The two most popular options — the Solo 401(k) and the SEP IRA — both let self-employed workers shelter significant income from taxes. But they work very differently, and choosing the wrong one could cost you tens of thousands in lost contributions over a decade.

This guide breaks down the 2026 numbers, compares real providers and their fees, and gives you a clear framework for picking the right plan based on your actual income.

TL;DR: If you earn under $150,000 per year, the Solo 401(k) almost always lets you contribute more. If you earn above $280,000 and want the simplest possible setup, the SEP IRA catches up. For most freelancers in the middle, the Solo 401(k) wins on flexibility, Roth access, and total contribution capacity.

2026 Contribution Limits at a Glance

The IRS raised limits again for 2026. Here is what each plan allows:

Feature	Solo 401(k)	SEP IRA
Max contribution (under 50)	$72,000	$72,000
Max contribution (age 50-59, 64+)	$80,000	$72,000
Enhanced catch-up (age 60-63)	$83,250	Not available
Employee deferral	$24,500	Not available
Employer profit-sharing	Up to 25% of compensation	Up to 25% of compensation
Roth contributions	Yes (employee portion)	Yes (provider-dependent)
Loan provision	Yes (plan-dependent)	No
Required filing	Form 5500-EZ if assets exceed $250K	None

The headline numbers look identical at $72,000, but the mechanics underneath are completely different.

Why the Solo 401(k) Lets Most Freelancers Save More

This is the single most important thing to understand: with a SEP IRA, your entire contribution is limited to 25% of your net self-employment income (effectively about 20% after the self-employment tax deduction). That means you need to earn roughly $280,000 in net profit to hit the $72,000 ceiling.

With a Solo 401(k), you get two contribution buckets. The first $24,500 comes from the employee deferral — you can contribute this amount regardless of your profit-sharing percentage. Then you add up to 20% of net self-employment income on top as the employer contribution.

Here is how that plays out at different income levels:

Net Self-Employment Income	SEP IRA Max Contribution	Solo 401(k) Max Contribution	Difference
$60,000	$12,000	$36,500	+$24,500
$80,000	$16,000	$40,500	+$24,500
$100,000	$20,000	$44,500	+$24,500
$150,000	$30,000	$54,500	+$24,500
$200,000	$40,000	$64,500	+$24,500
$280,000+	$72,000	$72,000	$0

At $80,000 in net income — a very common range for established freelancers — the Solo 401(k) lets you shelter an additional $24,500 per year. In a 24% tax bracket, that is $5,880 in tax savings annually, or nearly $60,000 over ten years before accounting for investment growth.

The Roth Advantage

The Solo 401(k) allows you to designate your $24,500 employee deferral as a Roth contribution. You pay taxes now, but all future growth and qualified withdrawals are completely tax-free. SEP IRAs have technically allowed Roth contributions since SECURE 2.0 passed, but most providers have been slow to implement it. As of early 2026, availability remains limited and provider-dependent.

If you expect your income to grow significantly over your career — common among freelancers building their client base — Roth contributions now can save you substantially in retirement.

Provider Comparison: Fees and Features

You do not need to pay a financial advisor to open either plan. Here are the major providers and what they charge:

Solo 401(k) Providers

Provider	Setup Fee	Annual Fee	Roth Option	Investments Available
Fidelity	$0	$0	No	Stocks, ETFs, mutual funds, bonds
Charles Schwab	$0	$0	No	Stocks, ETFs, 4,000+ no-load mutual funds
Ascensus (formerly Vanguard)	$0	$20/fund (waived at $50K+)	Yes	Vanguard mutual funds only
*ETRADE (Morgan Stanley)**	$0	$0	Yes	Stocks, ETFs, mutual funds, bonds
My Solo 401k Financial	$99	$0	Yes	Self-directed (any brokerage)
Carry	$0 setup	$149/year	Yes	Self-directed, crypto eligible

Key takeaway: If you want Roth contributions (and you probably should), your free options narrow. E*TRADE offers Roth at no annual cost. If you want Vanguard funds specifically, Ascensus works but limits you to mutual funds only — no ETFs.

SEP IRA Providers

Provider	Setup Fee	Annual Fee	Notes
Fidelity	$0	$0	Broadest investment selection
Charles Schwab	$0	$0	Strong research tools
Vanguard	$0	$20/fund (waived at $50K+)	Low-cost index fund leader
Betterment	$0	0.25% of assets annually	Automated portfolio management

SEP IRAs are simpler across the board. Every major brokerage offers them with zero setup friction. You can typically open one and fund it in under 15 minutes online.

When the SEP IRA Actually Wins

The SEP IRA is not always the worse choice. It wins in several scenarios:

You earn above $280,000. Both plans hit the same $72,000 ceiling, and the SEP IRA requires zero annual filings.

You have employees. A Solo 401(k) is only available to business owners with no full-time employees (a spouse is the exception). If you have hired even one full-time worker, you need a SEP IRA or a full 401(k) plan.

You want zero paperwork. SEP IRAs never require IRS filings. Solo 401(k) plans require Form 5500-EZ once assets exceed $250,000 — not burdensome, but not nothing.

You want to start in 5 minutes. A SEP IRA can be opened and funded the same day with any major brokerage. Solo 401(k) plans may take a few days for plan document setup.

How to Set Up Either Plan: Step by Step

Solo 401(k)

Choose a provider from the table above
Complete the plan adoption agreement (your provider supplies this)
Obtain an EIN from the IRS if you do not already have one (free, instant online)
Open the account and fund it
Deadline: The plan must be established by December 31, 2026, but you can make contributions until your tax filing deadline (April 15, 2027, or October 15 with extension)

SEP IRA

Choose a brokerage
Complete IRS Form 5305-SEP (your provider handles this digitally)
Open and fund the account
Deadline: You can establish and fund a SEP IRA up until your tax filing deadline, including extensions

The SEP IRA deadline flexibility is a genuine advantage. If you realize in March 2027 that you had a great 2026, you can open and fund a SEP retroactively. A Solo 401(k) must have been established by the end of the prior calendar year.

Decision Framework: Pick Your Plan in 60 Seconds

Answer these three questions:

Is your net self-employment income below $280,000? If yes, the Solo 401(k) likely saves you more.
Do you want Roth contributions? If yes, the Solo 401(k) gives you reliable access today.
Do you have full-time employees (not counting a spouse)? If yes, you cannot use a Solo 401(k).

If you answered yes to questions 1 or 2, and no to question 3, open a Solo 401(k). Otherwise, the SEP IRA is your play.

Frequently Asked Questions

Can I have both a Solo 401(k) and a SEP IRA?

Technically yes, but your total contributions across both plans cannot exceed IRS limits. In most cases, running both adds complexity without increasing your total contribution room. Pick one.

What happens if I hire an employee later?

If you add a full-time employee (other than a spouse), you can no longer use a Solo 401(k). You would need to convert to a standard 401(k) plan or switch to a SEP IRA. Plan ahead if you expect to hire within the next year or two.

Can I contribute to a Solo 401(k) and a Roth IRA?

Yes. These are separate contribution limits. In 2026, you can contribute up to $7,000 to a Roth IRA ($8,000 if age 50+) on top of your Solo 401(k) contributions, assuming you meet the income eligibility requirements.

What if I miss the December 31 deadline for a Solo 401(k)?

You cannot establish a Solo 401(k) retroactively. If you missed the deadline, open a SEP IRA before your tax filing deadline and contribute there for the current tax year. Then establish a Solo 401(k) before December 31 of the following year.

Do I need an accountant to manage either plan?

No. Both plans are designed for self-employed individuals to manage independently. However, if your situation involves multiple business entities, high income, or mega-backdoor Roth strategies, a one-time consultation with a tax professional (expect $200 to $500) can pay for itself many times over.

The Bottom Line

For the majority of freelancers earning between $50,000 and $250,000, the Solo 401(k) is the stronger retirement vehicle. The $24,500 employee deferral gives you a fixed contribution floor that does not depend on your profit-sharing math, and Roth access lets you build a tax-free retirement bucket.

Open a Solo 401(k) before December 31, 2026. Fund it consistently. Your future self will thank you — and your current self will appreciate the tax deduction on this year’s return.

If simplicity matters more than maximizing contributions, the SEP IRA remains a solid, zero-hassle alternative. Either way, the worst retirement plan for a freelancer is the one you never open.