What Is a SEP IRA? Contribution Limits, Rules, and Who Should Use One

If you are self-employed or run a small business, you have access to retirement accounts that offer contribution limits far beyond what a standard IRA allows. The SEP IRA -- Simplified Employee Pension Individual Retirement Account -- is one of the most straightforward of these, requiring almost no administrative overhead while allowing contributions up to $70,000 for 2026. For a freelancer, contractor, or sole proprietor who wants to shelter a meaningful portion of income from taxes, it is often the fastest path to a large pre-tax retirement contribution.

But the SEP IRA has a significant catch if you have employees, and it is not always the best choice compared to a Solo 401(k). This guide covers how it works, the 2026 limits, who qualifies, and when a different account type makes more sense.

How a SEP IRA Works

A SEP IRA is an employer-funded retirement plan -- meaning contributions come from the business, not from the employee's paycheck. For a sole proprietor or single-member LLC with no employees, "employer" and "employee" are the same person, which simplifies things considerably. You open the account at any major brokerage (Fidelity, Vanguard, Schwab, etc.), make a contribution before your tax filing deadline (including extensions), deduct the full contribution from business income, and invest the funds however you choose within the account.

Contributions grow tax-deferred, exactly like a traditional IRA or traditional 401(k). Withdrawals in retirement are taxed as ordinary income. There are no Roth SEP IRA contributions -- all SEP IRA money goes in pre-tax.

2026 SEP IRA Contribution Limits

The 25% of compensation rule sounds simple, but for self-employed individuals it is slightly more complex. Because you must deduct half your self-employment tax from net earnings before calculating the contribution, the effective maximum contribution rate is approximately 20% of net self-employment income (not 25%). For example, if your net self-employment income is $200,000, your maximum SEP IRA contribution is roughly $40,000, not $50,000.

Use our Retirement Calculator to model how consistently contributing $30,000–$70,000 per year compounds over 10, 20, or 30 years toward a target retirement number.

The Employee Catch: Mandatory Equal Contributions

Here is the provision that changes the calculus for business owners with staff: if you have eligible employees, you must contribute the same percentage of compensation to their SEP IRAs as you contribute to your own. If you contribute 20% of your compensation, you must contribute 20% of each eligible employee's compensation to their accounts as well.

An eligible employee is anyone who is at least 21 years old, has worked for you in at least 3 of the last 5 years, and earned at least $750 in compensation (2026 threshold). You can use more restrictive eligibility requirements, but not more lenient ones.

This means a sole proprietor with no employees can contribute aggressively to a SEP IRA with zero administrative burden. A business owner with even a few employees who earns significantly more than they pay staff faces a meaningful cost multiplication. A Solo 401(k) -- available only to businesses with no employees other than a spouse -- avoids this entirely.

SEP IRA vs. Solo 401(k): Which Is Better?

At high income levels (above roughly $200,000 net self-employment income), the two accounts produce nearly identical maximum contributions and the SEP IRA's simplicity wins. At lower income levels -- say $80,000 of net self-employment income -- a Solo 401(k) allows a significantly larger contribution because the $23,500 employee deferral is available regardless of profit percentage, while the SEP IRA is capped at roughly $16,000 (20% of $80,000).

Setting Up a SEP IRA

The setup process is genuinely simple -- simpler than any other employer-sponsored plan:

1. Choose a provider. Any major brokerage -- Fidelity, Vanguard, Schwab, or a specialized self-directed IRA provider -- offers SEP IRAs. The IRS Form 5305-SEP serves as the plan document and is available directly from the IRS; most brokerages have their own equivalent prototype document.
2. Open the account. Takes 15–30 minutes online. You will need your EIN (Employer Identification Number) or Social Security number if operating as a sole proprietor without an EIN.
3. Calculate your contribution. Your tax professional can confirm the exact deductible amount based on your net self-employment income for the year.
4. Fund before the deadline. Contributions can be made up until your tax return filing deadline, including extensions. This means you can open and fund a SEP IRA as late as October 15th for the prior tax year if you filed an extension -- giving you significant flexibility.
5. Invest the funds. Select your investments -- low-cost index funds are the standard recommendation for most investors. The money does not grow on its own just because it is in the account.

SEP IRA Withdrawal Rules

SEP IRA withdrawals follow the same rules as traditional IRAs:

• Age 59½: Withdrawals are penalty-free and taxed as ordinary income.
• Before 59½: Subject to a 10% early withdrawal penalty plus ordinary income tax, with the same exceptions as a traditional IRA (first home purchase up to $10,000, disability, substantially equal periodic payments, etc.).
• Required Minimum Distributions (RMDs): Begin at age 73, same as traditional IRAs and 401(k)s.

There is no option to take loans from a SEP IRA, unlike a Solo 401(k) which allows loans up to $50,000. If liquidity is a concern, this is another point in favor of the Solo 401(k) for eligible business owners.