Are SEP IRA Contributions Tax Deductible for the Self-Employed?

Yes. For a self-employed person, contributions to a traditional SEP IRA are tax deductible, and they come off your income as an above-the-line adjustment rather than an itemized deduction. That means you claim the standard deduction and still get the SEP write-off. For 2026, the deduction is capped at roughly 20% of your adjusted net self-employment earnings, with a hard ceiling of $72,000.¹

What the Deduction Actually Reduces

The SEP contribution comes off the top of your gross income and lowers your adjusted gross income. Because AGI feeds into phase-outs for other credits and deductions, the effect can extend beyond the contribution itself. The deduction is available whether you file as a sole proprietor, a partner in a partnership, or a member of an LLC taxed as a partnership or sole proprietorship. For retirement plan purposes, the IRS treats each partner or LLC member as an employee of the business, so the contribution you make on your own behalf is deductible to you.²

One thing the deduction does not do: it does not reduce your self-employment tax. Self-employment tax is calculated on your full Schedule C net profit before the SEP contribution enters the picture. The SEP deduction is taken on Schedule 1 of Form 1040, not on Schedule C.³

A boundary worth noting: since 2023, SECURE 2.0 has allowed SEP contributions to be designated as Roth. If you choose that route, you pay tax on the contribution now in exchange for tax-free qualified withdrawals later, and those Roth-designated amounts are not deductible. The rest of this article assumes traditional, pre-tax SEP contributions.⁴

Calculating Your Maximum Deductible Contribution

The employee-side rule for SEP plans is up to 25% of compensation. For a self-employed person, the number is different because your contribution reduces the same net earnings figure the contribution is calculated from. Work it through and the effective rate lands at roughly 20% of your adjusted net earnings.⁵

The calculation runs in four steps:

Start with your net profit from Schedule C.
Subtract the deductible half of your self-employment tax (calculated on Schedule SE). The result is your plan compensation.
Multiply that plan compensation by 20% to get your maximum contribution.
Confirm the result is at or below the 2026 ceiling of $72,000.¹

An example makes it concrete. If your Schedule C net profit is $100,000, subtract the deductible half of self-employment tax (roughly $7,065). That leaves about $92,935 in plan compensation. Twenty percent of that figure is approximately $18,587, which is both your maximum SEP contribution and your maximum deduction for the year.⁵

There is a separate compensation cap that matters at higher income levels. For 2026, only the first $360,000 of compensation counts toward the calculation.¹ For most self-employed contributors the $72,000 dollar ceiling will bind first, but the compensation cap is why the percentage rule alone doesn’t keep climbing indefinitely.

The IRS Deduction Worksheet for Self-Employed in Publication 560 walks through the same steps. Using it avoids the most common mistake: applying the 25% employee rate to your own net income, which produces an over-contribution.⁶

One more limit to know about, because people ask: SEP IRAs do not have age-50 catch-up contributions. Catch-up rules apply to employee elective deferrals, and SEP plans are funded entirely by employer contributions.²

Where to Claim It on Your Tax Return

The SEP deduction goes on Line 16 of Schedule 1 (Form 1040), the line for self-employed SEP, SIMPLE, and qualified plans. The total from Schedule 1 carries to Form 1040 and reduces your AGI.⁷ No separate retirement plan form is required.

The number you enter should match what actually landed in the SEP IRA for that tax year. Employer SEP contributions don’t go on Form 8606; that form is for tracking nondeductible traditional IRA contributions. If your SEP IRA custodian also allowed you to make regular traditional IRA contributions to the same account, those follow separate IRA rules and are reported separately.⁸

When You Have to Contribute By

You have until your tax filing deadline, including extensions, to make a SEP contribution for a given tax year. For most self-employed filers that’s mid-April; with an extension it stretches to mid-October, and the contribution still counts for the prior year’s return.²

The plan itself can also be established after the tax year ends, as long as it’s set up by that same filing deadline (extensions included). If you had a strong 2026 and didn’t open a SEP until March 2027, you can still open and fund one for 2026. That’s a real advantage over a solo 401(k), which generally has to exist by December 31 of the year it covers.

How a SEP Affects Your Separate Traditional IRA Deduction

Participating in a SEP makes you “covered by a workplace retirement plan” for IRS purposes, which triggers income-based phase-outs on the deductibility of a separate traditional IRA contribution. For 2026, a single filer covered by a SEP loses the traditional IRA deduction between $81,000 and $91,000 of AGI. For a married couple filing jointly where the contributing spouse is covered, the phase-out runs from $129,000 to $149,000.⁹

The SEP deduction itself has no AGI phase-out. This rule only affects a second, personal traditional IRA contribution you might have wanted to deduct on top of the SEP.

What Happens If You Contribute Too Much

Over-contributing costs money. A 6% excise tax applies to the excess amount for every year it stays in the account, calculated annually until the excess is withdrawn or absorbed by later contribution room.¹⁰

Catch the mistake before your filing deadline (with extensions), pull out the excess along with any earnings on it, and you can avoid the 6% penalty. Miss that window and you’ll report the penalty on Form 5329 with your return.²¹¹ That penalty is the strongest argument for running the Publication 560 worksheet before you fund the account rather than after.

1
Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs, as Adjusted for Changes in Cost-of-Living
2
Internal Revenue Service. Retirement Plans FAQs Regarding SEPs
3
Internal Revenue Service. 2025 Instructions for Schedule C (Form 1040)
4
Internal Revenue Service. SECURE 2.0 Act Changes Affect How Businesses Complete Forms W-2
5
Internal Revenue Service. Self-Employed Individuals – Calculating Your Own Retirement Plan Contribution and Deduction
6
U.S. Department of Labor. SEP Retirement Plans for Small Businesses
7
Internal Revenue Service. 2025 Schedule 1 (Form 1040)
8
Internal Revenue Service. 2025 Instructions for Form 8606 – Nondeductible IRAs
9
Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
10
Office of the Law Revision Counsel. 26 USC 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts and Annuities
11
Internal Revenue Service. Instructions for Form 5329