13.1 Small Employer Retirement Solutions: SEPs, SIMPLEs & PEPs

Small Employer Retirement Solutions: SEPs, SIMPLEs & PEPs

Quick Answer: Small employers lacking the administrative infrastructure for complex traditional 401(k) plans utilize specialized statutory vehicles: SEP-IRAs (IRC §408(k)) provide high discretionary employer contributions (up to 25% of pay or $72,000 for 2026) with strict 3-of-5 year eligibility; SIMPLE IRAs (IRC §408(p)) allow employee salary deferrals ($17,000 limit in 2026) with mandatory 3% match or 2% nonelective employer funding for firms with ≤100 workers, subject to a 25% early withdrawal penalty in years 1–2; Solo 401(k)s allow owner-only firms to reach the $72,000 cap; and Pooled Employer Plans (PEPs) allow unrelated small employers to pool into a single large-scale plan run by a certified Pooled Plan Provider (PPP) without joint liability under the repealed "bad apple" doctrine.

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1. Simplified Employee Pension (SEP-IRA) Plans (IRC §408(k))

A Simplified Employee Pension (SEP-IRA) is an employer-sponsored retirement arrangement authorized under Internal Revenue Code §408(k). Under a SEP, an employer establishes traditional (or, post-SECURE 2.0, designated Roth) Individual Retirement Accounts (IRAs) for eligible employees and makes direct, tax-deductible employer contributions into those individual accounts.

┌────────────────────────────────────────────────────────────────────────┐
│                     SEP-IRA CORE STATUTORY ARCHITECTURE                │
├──────────────────────────┬─────────────────────────────────────────────┤
│ Plan Adoption Document   │ IRS Form 5305-SEP (Model) or Prototype SEP  │
├──────────────────────────┼─────────────────────────────────────────────┤
│ Eligible Sponsoring      │ Any business entity: Sole Proprietorships,  │
│ Employers                │ Partnerships, LLCs, S-Corps, C-Corps, Non-P │
├──────────────────────────┼─────────────────────────────────────────────┤
│ Employee Deferrals       │ PROHIBITED (Employer contributions only;    │
│                          │ legacy SAR-SEPs grandfathered pre-1997)     │
├──────────────────────────┼─────────────────────────────────────────────┤
│ Vesting Schedule         │ 100% IMMEDIATE statutory vesting on all     │
│                          │ contributed dollars                         │
├──────────────────────────┼─────────────────────────────────────────────┤
│ Annual Deduction Limit   │ IRC §404(h): 25% of aggregate eligible comp │
├──────────────────────────┼─────────────────────────────────────────────┤
│ Individual Addition Cap  │ IRC §415(c): Lesser of 25% comp or $72,000  │
│                          │ (2026 statutory ceiling)                    │
└──────────────────────────┴─────────────────────────────────────────────┘

Statutory Eligibility & Participation Mandates (IRC §408(k)(2))

Unlike qualified 401(k) plans which permit a standard 1-year of service / 1,000-hour requirement, SEP plans are governed by distinct statutory eligibility criteria. An employer maintaining a SEP must contribute on behalf of every employee who satisfies all three of the following statutory benchmarks:

1. Age Requirement: Has attained age 21.
2. Service Requirement: Has performed service for the employer in at least 3 of the immediately preceding 5 calendar years (any service during a calendar year, even 1 hour, counts as a year of service).
3. Compensation Threshold: Has received at least $800 in compensation (indexed for inflation; $750 for 2025, $800 for 2026) from the employer for the determination year.

Permissible Exclusions: An employer may exclude only: (a) employees covered under a collective bargaining agreement where retirement benefits were the subject of good-faith bargaining, and (b) non-resident alien employees with no U.S.-source earned income.

Contribution Limits and Allocation Rules

• Discretionary Employer Funding: The employer has complete flexibility to decide each year whether to contribute and how much to contribute (from 0% up to 25% of eligible payroll). However, contributions must be made pursuant to a written allocation formula that provides a uniform percentage of compensation across all eligible employees.
• Individual §415(c) Limit: The maximum allocation to any individual employee's SEP-IRA for 2026 is the lesser of 25% of compensation or $72,000 (subject to the IRC §401(a)(17) annual compensation cap of $350,000 for 2025 / $360,000 for 2026).
• Self-Employed Earned Income Calculation: For sole proprietors and partners, "compensation" is defined as net self-employment earnings minus the deduction for one-half of self-employment tax, minus the retirement contribution itself. This mathematical circularity reduces the nominal 25% contribution rate to an effective maximum contribution rate of 20% of adjusted net earnings: $\text{Effective Rate} = \frac{\text{Plan Rate}}{1 + \text{Plan Rate}} = \frac{0.25}{1 + 0.25} = 0.20 \; (20\%)$
• Social Security Integration (Permitted Disparity): Under IRC §408(k)(3)(D), an employer using a non-model prototype SEP plan may integrate contributions with Social Security (permitted disparity) to allocate higher contributions on compensation above the Social Security Taxable Wage Base ($176,100 for 2025 / $184,500 for 2026), subject to the 5.7% maximum disparity spread. Note: IRS Form 5305-SEP does not permit Social Security integration.

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2. Savings Incentive Match Plans for Employees (SIMPLE IRAs) (IRC §408(p))

The SIMPLE IRA (Savings Incentive Match Plan for Employees) is a salary-reduction retirement arrangement codified under IRC §408(p) designed specifically for small businesses that cannot afford the high testing and compliance overhead of a traditional 401(k) plan.

┌────────────────────────────────────────────────────────────────────────┐
│                     SIMPLE IRA STATUTORY FRAMEWORK                     │
├──────────────────────────┬─────────────────────────────────────────────┤
│ Employer Size Ceiling    │ ≤ 100 employees who earned ≥ $5,000 in the  │
│                          │ preceding calendar year                     │
├──────────────────────────┼─────────────────────────────────────────────┤
│ 2-Year Grace Period      │ If employer exceeds 100 employees, plan may │
│                          │ continue for 2 calendar years post-growth   │
├──────────────────────────┼─────────────────────────────────────────────┤
│ Exclusive Plan Mandate   │ Employer CANNOT maintain ANY other active   │
│                          │ qualified plan, 403(b), or SEP during year  │
├──────────────────────────┼─────────────────────────────────────────────┤
│ Employee Eligibility     │ Earned ≥ $5,000 in ANY 2 preceding years   │
│                          │ AND reasonably expected to earn ≥ $5,000    │
├──────────────────────────┼─────────────────────────────────────────────┤
│ 2026 Deferral Limit      │ $16,500 (standard) + $3,500 catch-up (50+) │
│                          │ SECURE 2.0 bump: $18,150 + $3,850 catch-up  │
├──────────────────────────┼─────────────────────────────────────────────┤
│ Vesting                  │ 100% IMMEDIATE on all employee & employer $ │
└──────────────────────────┴─────────────────────────────────────────────┘

Mandatory Employer Contribution Formulas

An employer maintaining a SIMPLE IRA must fund one of two mandatory employer contribution formulas every single year:

┌────────────────────────────────────────────────────────────────────────┐
│                MANDATORY SIMPLE IRA EMPLOYER CONTRIBUTIONS             │
├──────────────────────────────────┬─────────────────────────────────────┤
│ Option A: Matching Contribution  │ Option B: Non-Elective Contribution │
├──────────────────────────────────┼─────────────────────────────────────┤
│ • Dollar-for-dollar match up to  │ • Flat 2.0% of compensation funded  │
│   3.0% of employee compensation. │   for EVERY eligible employee who   │
│ • Reduced Match Exception: Plan  │   earned $5,000+, regardless of     │
│   sponsor may reduce match to no │   whether they make salary deferrals│
│   lower than 1.0% in no more than│ • Subject to IRC §401(a)(17) annual │
│   2 out of any 5 consecutive yrs │   compensation ceiling ($350,000/   │
│   (requires 60-day notice).      │   $360,000 for 2026). Max = $7,200. │
│ • Comp limit under §401(a)(17)   │ • Cannot be reduced in lean years.  │
│   does NOT cap the match base!   │                                     │
└──────────────────────────────────┴─────────────────────────────────────┘

Critical Distinction: Under Option A (Matching), the IRC §401(a)(17) compensation limit does not apply for computing matching dollars. For example, if an executive earns $400,000 and defers $16,500, a 3% match yields $12,000 (3% of $400,000). Under Option B (Nonelective), compensation is capped by §401(a)(17), limiting a 2% contribution to 2% of $360,000 = $7,200.

The 2-Year 25% Early Withdrawal Penalty (IRC §72(t)(6))

To ensure assets deposited in SIMPLE IRAs remain committed to retirement savings, Congress enacted a severe early distribution penalty under IRC §72(t)(6):

• If a participant takes a premature distribution from a SIMPLE IRA within the first 2 years of initial plan participation (measured from the date employer contributions are first deposited into the participant's account), the standard 10% early withdrawal tax penalty is increased to 25%.
• Rollover Restrictions: During this initial 2-year window, SIMPLE IRA balances can only be rolled over into another SIMPLE IRA. Any rollover into a Traditional IRA or qualified 401(k) plan within the 2-year window is treated as an impermissible distribution, triggering ordinary income tax and the 25% penalty.

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3. SIMPLE 401(k) vs. Solo 401(k) Plans

Maximizing the Solo 401(k) Advantage

A Solo 401(k) allows an owner-employee to maximize tax shelter capacity by contributing in a dual capacity:

1. As Employee: Elective deferral up to $24,500 (or $32,500 if age 50+, or $35,750 if ages 60–63 under SECURE 2.0 super catch-up).
2. As Employer: Discretionary profit-sharing contribution up to 25% of W-2 compensation (or 20% of adjusted net self-employment earnings).
3. Combined §415(c) Limit: Total combined additions cannot exceed $72,000 for 2026 (excluding catch-up deferrals).

Example: An unincorporated consultant with $180,000 in net self-employment earnings (after 1/2 SE tax deduction) can defer $24,500 as an employee, plus contribute $36,000 (20% of $180,000) as an employer, achieving a total tax deduction of $60,500.

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4. Multiple Employer Plans (MEPs) & Pooled Employer Plans (PEPs)

Historically, small businesses faced high per-capita administrative costs and audit fees when establishing standalone 401(k) plans. To solve this structural market failure, Congress modernized multiple employer structures under the Setting Every Community Up for Retirement Enhancement (SECURE) Act of 2019.

┌────────────────────────────────────────────────────────────────────────┐
│                     MEP AND PEP STRUCTURAL SPECTRUM                    │
├──────────────────────────┬─────────────────────────────────────────────┤
│ Plan Structure           │ Defining Characteristics & Regulatory Rules │
├──────────────────────────┼─────────────────────────────────────────────┤
│ 1. Closed MEP            │ Unrelated employers sharing a common nexus, │
│    (Traditional MEP)     │ trade association, or geographic industry   │
│                          │ (e.g., National Auto Dealers Association).  │
├──────────────────────────┼─────────────────────────────────────────────┤
│ 2. Open MEP              │ Multiple unrelated employers with NO common │
│    (Pre-SECURE)          │ nexus; historically treated by DOL as       │
│                          │ separate plans requiring multiple 5500s.    │
├──────────────────────────┼─────────────────────────────────────────────┤
│ 3. Pooled Employer       │ Codified under SECURE Act (ERISA §3(43)):   │
│    Plan (PEP)            │ Unrelated employers join a SINGLE qualified │
│                          │ DC plan operated by a certified PPP.        │
└──────────────────────────┴─────────────────────────────────────────────┘

The Pooled Plan Provider (PPP)

Under ERISA §3(43), a Pooled Plan Provider (PPP) is the central entity establishing and operating a PEP. The PPP must:

• Register with the Department of Labor (DOL Form PR) and the IRS before initiating plan operations.
• Act as the designated Plan Administrator and Named Fiduciary under ERISA §3(16) and §402.
• Ensure all plan assets are held in an exclusive-benefit trust by a qualified trustee (ERISA §403).
• Assume primary responsibility for plan design, investment menu selection, non-discrimination testing, participant disclosures, and filing a single consolidated Form 5500 and single independent financial audit for the entire pooled structure.

Elimination of the "Bad Apple" Rule

Prior to the SECURE Act, multiple employer arrangements were severely hindered by the "Unified Plan Rule" (the "Bad Apple" Rule). Under this doctrine, if a single participating employer failed to satisfy qualification requirements (e.g., failed nondiscrimination testing or missed top-heavy minimum contributions), the entire MEP lost its tax-qualified status, penalizing all innocent participating employers.

• SECURE Act Reform: The statute statutorily eliminates the Bad Apple rule for PEPs and qualified MEPs.
• Spin-Off Remedy: If a participating employer fails to comply with plan terms or provide required testing data, the PPP is authorized to spin off the non-compliant employer's assets and liabilities into a separate standalone plan, preserving the qualified status of the remaining pooled plan.

Residual Fiduciary Obligations of Participating Employers

While joining a PEP offloads day-to-day administrative burdens (Form 5500, participant notices, audit management), participating employers do not achieve complete fiduciary immunity. Under ERISA §404(a), participating employers retain two permanent fiduciary responsibilities:

1. Prudent Selection & Monitoring: The employer remains a fiduciary regarding the initial selection and ongoing monitoring of the Pooled Plan Provider, investment managers, and overall plan fee reasonableness.
2. Timely Contribution Remittance: The employer remains strictly liable for timely remitting employee salary deferrals and employer matching dollars to the pooled trust within statutory DOL deadlines.