SEP IRA vs. Traditional IRA: Shared Rules and Key Differences

A SEP IRA and a Traditional IRA are, at the account level, the same thing: federal tax law defines a Simplified Employee Pension as a Traditional IRA that meets extra requirements for employer contributions.1Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts – Section: (k) Simplified Employee Pension Defined That shared foundation means withdrawals, required distributions, prohibited investments, rollovers, and inheritance follow nearly identical rules. The real differences show up in three places: how much can go in, when it has to go in, and how the account is protected from creditors.

The Shared Legal Foundation

The tax code does not create a separate vehicle for a SEP. It layers employer-contribution rules on top of an ordinary Traditional IRA held by the employee. Your SEP IRA at any custodian sits in the same trust structure and is reported on the same tax forms as any other Traditional IRA.

Employers usually establish a SEP using IRS Form 5305-SEP, a model agreement that fixes the contribution formula and eligibility rules. Filing the unmodified form also satisfies federal reporting duties under ERISA, and employees must receive a copy when they first become eligible.2eCFR. 29 CFR 2520.104-48 – Alternative Method of Compliance for Model Simplified Employee Pensions The employer decides how much to contribute each year, but the account belongs entirely to the employee. Federal law forbids the employer from conditioning contributions on the money staying put and from restricting withdrawals in any way.3Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts – Section: (k)(4) Withdrawals Must Be Permitted Once the deposit clears, the money is yours to invest, transfer, or withdraw under Traditional IRA rules.

Contribution Limits in 2026

The gap in contribution limits is enormous, and it’s the main reason business owners set up a SEP. For 2026, an employer can contribute the lesser of 25% of compensation or $72,000 to a SEP IRA.4Internal Revenue Service. SEP Contribution Limits (Including Grandfathered SARSEPs) A Traditional IRA allows $7,500 in annual contributions, plus a $1,100 catch-up if you’re 50 or older.5Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500

Only the employer funds a SEP. Employees cannot add salary deferrals. You can hold a SEP IRA and a separate Traditional IRA and contribute to each within its own limit, though as explained below, participating in a SEP usually cuts into the deduction for the Traditional IRA contribution.

If You’re Self-Employed

Self-employed contributors are both employer and employee, and the math is circular. You cannot simply take 25% of Schedule C profit. You reduce net self-employment earnings by half of the self-employment tax deduction, then apply a reduced contribution rate. At a 25% plan rate, the effective rate on net earnings works out to roughly 20% after the self-employment tax adjustment.6Internal Revenue Service. Calculating Your Own Retirement Plan Contribution and Deduction The IRS publishes worksheets and a rate table. Getting the calculation wrong is a common SEP mistake and can trigger a 6% excess-contribution penalty each year the extra amount stays in the account.

Funding Deadlines Are Not the Same

A SEP can be established and funded as late as the due date of the business tax return, including extensions.7Internal Revenue Service. Retirement Plans FAQs Regarding SEPs Extend the business return six months, and both plan setup and contributions can wait until October. That flexibility lets business owners size the contribution after seeing their final numbers.

Traditional IRA contributions are tighter. The deadline is your personal tax return filing due date without extensions, which typically means April 15 of the following year.8Internal Revenue Service. Traditional and Roth IRAs Filing an extension on your personal return does not buy extra time to fund a Traditional IRA.

If a business misses the SEP contribution deadline because it did not extend, those contributions cannot be deducted on the current year’s return; they may instead be deducted the following year.7Internal Revenue Service. Retirement Plans FAQs Regarding SEPs

Employee Eligibility and Nondiscrimination

A business with employees cannot pick and choose who benefits from a SEP. Federal law sets minimum eligibility standards. An employer can be more generous but not more restrictive. An employee must be included if they meet all three conditions:

  • At least 21 years old
  • Worked for the employer in at least three of the past five years
  • Earned at least $800 from the employer during the year (the 2026 threshold, adjusted for inflation)9Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs

Employers can exclude union workers whose retirement benefits were collectively bargained and nonresident aliens with no U.S. compensation.10Internal Revenue Service. Simplified Employee Pension Plan (SEP)

The rule that surprises owners most is nondiscrimination. Employer SEP contributions must bear a uniform relationship to each eligible employee’s compensation, so an owner generally cannot fund a higher percentage for themselves than for rank-and-file staff.11Internal Revenue Service. Chapter 15 – Simplified Employee Pensions (SEPs) Contribute 15% of your own pay, and every eligible employee gets 15% of theirs. A Traditional IRA has no such requirement because there’s no employer involved.

How SEP Participation Cuts Into a Traditional IRA Deduction

Receiving even one dollar of SEP contributions makes you an “active participant” in an employer plan for that tax year. That label triggers income-based limits on how much of any separate Traditional IRA contribution you can deduct.7Internal Revenue Service. Retirement Plans FAQs Regarding SEPs The 2026 phase-out ranges by filing status:

That last row matters for a common setup: a self-employed spouse runs a SEP, and the other spouse (no employer plan) contributes to a Traditional IRA. The uncovered spouse’s deduction only begins to phase out above $242,000 in joint income, which is far more generous than the range for the covered spouse.

Non-deductible Traditional IRA contributions remain available regardless of income, but losing the upfront deduction changes the math on whether that contribution beats other savings options.

The Rules That Are the Same

Because a SEP is a Traditional IRA, most of what governs the account after money is inside applies identically to both.

Early Withdrawals

Both accounts impose a 10% additional tax on distributions taken before age 59½, on top of regular income tax on the withdrawn amount.12Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions Several exceptions can eliminate the 10% penalty, including unreimbursed medical expenses above 7.5% of adjusted gross income, qualified first-time home purchases up to $10,000, and health insurance premiums during unemployment. A series of substantially equal periodic payments under Section 72(t) is also available for either account type.13Internal Revenue Service. Substantially Equal Periodic Payments

Required Minimum Distributions

Annual withdrawals must begin at age 73 from both accounts.14Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs Under SECURE Act 2.0, the age rises to 75 for individuals who turn 73 after December 31, 2032. Missing an RMD triggers a 25% excise tax on the shortfall, reduced to 10% if corrected within two years. The IRS can waive the penalty entirely for reasonable error if you file Form 5329 with a written explanation.15Internal Revenue Service. Instructions for Form 5329 If you own both SEP and Traditional IRAs, you calculate the total RMD across all of them combined and can take it from any one account or split it however you like.

Prohibited Transactions and Investments

Federal law bars self-dealing between your IRA and “disqualified persons,” which includes you, your spouse, ancestors, lineal descendants, and entities where you or your family hold 50% or more ownership.16Office of the Law Revision Counsel. 26 USC 4975 – Tax on Prohibited Transactions You cannot sell property to your IRA, borrow from it, use it as loan collateral, or buy property from it for personal use. The consequence is severe: if a prohibited transaction occurs, the account stops being an IRA as of January 1 of that year, and the entire fair market value is treated as distributed to you on that date.17Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts – Section: (e)(2) Loss of Exemption Life insurance and most collectibles (art, antiques, gems, stamps, alcohol) are also off-limits, with a narrow exception for gold, silver, platinum, and palladium coins and bullion that meet purity standards.18Internal Revenue Service. Retirement Plan Investments FAQs

Rollovers and Roth Conversions

Moving money between a SEP and a Traditional IRA is straightforward because they are the same account type. A direct trustee-to-trustee transfer in either direction creates no taxable event and faces no frequency limits.19Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions The 60-day rollover method carries the one-per-year limit that aggregates every IRA you own (Traditional, SEP, SIMPLE, and Roth combined); the limit does not apply to trustee-to-trustee transfers or Roth conversions.

Roth conversions work identically from either account. The converted amount is included in your taxable income for the year, and since 2018, Roth conversions cannot be reversed, so the decision is final.20Internal Revenue Service. Retirement Plans FAQs Regarding IRAs

Inherited Accounts

Death rules follow the beneficiary, not the funding source. A surviving spouse who is sole beneficiary can roll the account into their own IRA and treat it as if it had always been theirs, delay distributions, take them over their own life expectancy, or use the 10-year depletion rule.21Internal Revenue Service. Retirement Topics – Beneficiary Most non-spouse designated beneficiaries must empty the account by the end of the 10th year after the owner’s death. Eligible designated beneficiaries (minor children of the deceased, disabled or chronically ill individuals, and those no more than 10 years younger than the deceased) can stretch distributions over their own life expectancy, though a minor child’s 10-year clock starts at the age of majority.

Where the Labels Actually Matter: Bankruptcy Protection

Federal bankruptcy law is one place where the SEP and Traditional labels produce different outcomes despite the shared account structure. Traditional IRA assets from personal contributions are protected only up to an inflation-adjusted cap, currently $1,711,975. SEP IRAs are explicitly excluded from that cap, so accounts funded under a Simplified Employee Pension receive unlimited federal bankruptcy protection.22Office of the Law Revision Counsel. 11 USC 522 – Exemptions

Outside bankruptcy, state laws govern creditor protection and vary significantly. Some states extend unlimited protection to all IRA types; others cap Traditional IRAs while leaving SEP IRAs fully shielded. If creditor exposure is part of your planning, the source of the dollars inside what looks like the same account can matter more than the account label suggests.