4.2 SECURE 2.0 Long-Term Part-Time (LTPT) Rules (500 Hours / 2-Year Standard)

4.2 SECURE 2.0 Long-Term Part-Time (LTPT) Rules (500 Hours / 2-Year Standard)

[!NOTE] Core Regulatory Standard: For nearly five decades following the passage of ERISA in 1974, qualified retirement plans were legally permitted to exclude part-time employees indefinitely, provided they never worked 1,000 hours in a 12-month computation period. The Setting Every Community Up for Retirement Enhancement Act of 2019 (SECURE Act) and the SECURE 2.0 Act of 2022 fundamentally revolutionized this landscape by enacting mandatory participation rules for Long-Term Part-Time (LTPT) Employees. Under IRC §401(k)(2)(D)(ii) and SECURE 2.0 §125, employers maintaining 401(k) and ERISA 403(b) plans must permit employees who complete 2 consecutive 12-month computation periods with at least 500 hours of service (and attain age 21) to make elective salary deferrals.

The LTPT mandate represents one of the most substantial operational overhauls in modern retirement plan administration. TPAs, recordkeepers, and plan administrators must maintain distinct dual-track service records: one tracking the traditional 1,000-hour standard for employer contributions and statutory coverage, and another tracking the 500-hour standard for elective deferral eligibility and vesting.

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Legislative Evolution: SECURE Act of 2019 vs. SECURE 2.0 §125

Understanding the precise effective dates and statutory transition from the original SECURE Act of 2019 to SECURE 2.0 is essential for ASPPA QKA exam candidates:

                                    Evolution of the LTPT Mandate
   SECURE Act of 2019 (§112)                                        SECURE 2.0 Act of 2022 (§125)
┌────────────────────────────────────────┐                       ┌────────────────────────────────────────┐
│ • Standard: 3 Consecutive Years        │                       │ • Standard: 2 Consecutive Years        │
│ • Service Threshold: 500+ Hours/Year   │      Accelerated      │ • Service Threshold: 500+ Hours/Year   │
│ • Age Condition: Attainment of Age 21  │──────────────────────>│ • Age Condition: Attainment of Age 21  │
│ • Applicable Plans: 401(k) Only        │       by Congress     │ • Applicable Plans: 401(k) & 403(b)    │
│ • Effective: Plan Years > Dec 31, 2023 │                       │ • Effective: Plan Years > Dec 31, 2024 │
│   (First cohort entered Jan 1, 2024)   │                       │   (First 2-year cohort enters Jan 2025)│
└────────────────────────────────────────┘                       └────────────────────────────────────────┘

1. The Original SECURE Act of 2019 Framework

Under Section 112 of the original SECURE Act (enacted December 2019):

• A 401(k) plan was required to admit an employee to make elective deferrals if they completed 3 consecutive 12-month periods during each of which they were credited with at least 500 hours of service, and reached age 21 by the close of the third period.
• Effective Date: Plan years beginning after December 31, 2023 (January 1, 2024 for calendar-year plans).
• The 2021 Service Lookback: The statute mandated that 12-month computation periods beginning before January 1, 2021, were disregarded. Therefore, the earliest qualifying 3-year computation periods were 2021, 2022, and 2023, resulting in the first-ever cohort of LTPT participants entering plans on January 1, 2024.

2. The SECURE 2.0 Act of 2022 Acceleration (§125)

Recognizing that a 3-year waiting period still excluded many permanent part-time workers, Congress enacted Section 125 of SECURE 2.0 (enacted December 2022):

• Reduction to 2 Years: Congress shortened the eligibility standard from 3 consecutive years to 2 consecutive 12-month computation periods with at least 500 hours of service.
• Effective Date: Effective for plan years beginning after December 31, 2024 (i.e., January 1, 2025 for calendar-year plans).
• Temporary 2024 Rule: For the 2024 plan year, the 3-year standard remained in effect. Beginning with the 2025 plan year, the 2-year standard permanently governs!

3. Expansion to ERISA-Covered 403(b) Plans

Under SECURE 2.0 §125, Congress extended the LTPT rules to ERISA-covered 403(b) plans (under new IRC §403(b)(12)(D)):

• Effective for plan years beginning after December 31, 2024.
• 403(b) Service Lookback Date: For 403(b) plans, service in 12-month periods beginning before January 1, 2023, is disregarded for eligibility purposes. Therefore, the first cohort of LTPT employees entering ERISA 403(b) plans under the 2-year standard will enter on January 1, 2025 (tracking 2023 and 2024 service).

Plans Subject to vs. Exempt from the LTPT Mandate

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Service Tracking Mechanics: Eligibility vs. Vesting

Administering LTPT compliance requires tracking two entirely separate service timelines: one for eligibility to defer, and one for vesting in any employer contributions.

1. Eligibility Computation Periods (ECPs)

• Initial Period: Must begin on the employee's Employment Commencement Date (ECD) and span 12 consecutive months.
• Subsequent Periods: Can either continue on floating ECD anniversaries or shift to the plan year that begins during the initial period, exactly like traditional eligibility tracking under DOL Reg. §2530.202-2(b).
• Hour Threshold: At least 500 hours of service (actual hours or regulatory equivalencies).
• Consecutive Requirement: The computation periods must be consecutive. If an employee works 550 hours in Year 1, 420 hours in Year 2, and 600 hours in Year 3, the consecutive chain is broken! Year 2 is not a qualifying year, and the 2-year clock restarts in Year 3.

                  Consecutive Service Evaluation for LTPT Eligibility
Year 1 (2023):  [======= 620 Hours (Pass >= 500h) =======]  --> Streak = 1
Year 2 (2024):  [=== 410 Hours (FAIL < 500h) ===]           --> Streak Broken! Resets to 0
Year 3 (2025):  [======= 710 Hours (Pass >= 500h) =======]  --> Streak = 1
Year 4 (2026):  [======= 580 Hours (Pass >= 500h) =======]  --> Streak = 2 -> ELIGIBLE!

2. The Statutory Exclusion of Pre-2021 Service for Eligibility

Under IRC §401(k)(2)(D)(ii), 12-month computation periods beginning before January 1, 2021, are statutorily excluded when determining an employee's eligibility under the LTPT rules.

• Even if an employee worked 600 hours per year from 2015 through 2020, every single hour prior to 2021 is ignored for LTPT eligibility.

3. Vesting Service Rules and the 500-Hour Standard

When an employee enters a plan as an LTPT participant, standard qualified plan vesting rules undergo a statutory transformation:

• Under IRC §401(k)(15)(B)(iii), an LTPT participant must be credited with one Year of Vesting Service for each 12-month computation period during which they complete at least 500 hours of service (rather than the customary 1,000 hours).
• This 500-hour vesting standard applies across all computation periods during which the employee has 500+ hours, even if the employer does not make contributions in those years.

4. The Pre-2021 Vesting Controversy and the SECURE 2.0 Technical Correction

When the original SECURE Act of 2019 was enacted, it explicitly excluded pre-2021 service for eligibility, but the statutory text failed to include parallel language excluding pre-2021 service for vesting. This legislative drafting error triggered widespread industry panic that employers would be forced to review decades of historical payroll records to credit 500-hour vesting years back to an employee's date of hire!

[!IMPORTANT] The SECURE 2.0 Technical Correction: Section 125(b) of SECURE 2.0 corrected this drafting defect by amending the Internal Revenue Code to clarify that 12-month computation periods beginning before January 1, 2021, are EXCLUDED for BOTH eligibility AND vesting purposes in 401(k) plans (and pre-2023 service is excluded for 403(b) plans). Employers are not required to track or credit pre-2021 500-hour periods for vesting.

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Scope of Benefits: Elective Deferrals Only

A critical design element of the LTPT mandate is that it guarantees access to employee salary deferrals only. Congress specifically insulated employers from the financial burden of funding mandatory retirement contributions for part-time workers.

1. No Employer Contribution Obligation

Under IRC §401(k)(15)(B)(i), an employer is NOT required to provide any of the following to LTPT participants:

• Employer Matching Contributions: Even if the plan provides a dollar-for-dollar match to full-time participants, the employer is not legally obligated to match LTPT deferrals.
• Discretionary Profit-Sharing Allocations: The employer may exclude LTPT participants from non-elective profit-sharing pools.
• Safe Harbor Contributions: An employer operating a Safe Harbor 401(k) plan is NOT required to make the mandatory 3% nonelective contribution or safe harbor match on behalf of LTPT participants!

2. Preservation of Safe Harbor Status

Under IRS Notice 2020-68 and proposed Treasury regulations (REG-104194-23), an employer maintaining a safe harbor 401(k) plan under IRC §401(k)(12) or §401(k)(13) (QACA) does not jeopardize its safe harbor exemption from ADP/ACP testing by excluding LTPT employees from employer safe harbor contributions.

3. Voluntary Contributions Trigger the 500-Hour Vesting Rule

An employer is legally permitted to be more generous than the statute. If an employer voluntarily elects in its plan document to provide matching or profit-sharing contributions to LTPT participants, those contributions must be vested using the 500-hour Year of Vesting Service standard.

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Statutory Testing Exclusions: The Quadruple Relief Shield

If employers were forced to include part-time employees—who historically save at lower rates—in annual nondiscrimination testing, thousands of plans would fail ADP/ACP testing or lose qualified status. To prevent this outcome, Congress established a quadruple statutory testing shield:

+-------------------------------------------------------------------------------+
|           The Quadruple Testing Relief Shield for LTPT Employees             |
+-------------------------------------------------------------------------------+
|  1. Minimum Coverage Relief:   May elect to exclude LTPTs from IRC §410(b)    |
|  2. ADP Testing Relief:        May elect to exclude LTPTs from §401(k)(3)     |
|  3. ACP Testing Relief:        May elect to exclude LTPTs from §401(m)(2)     |
|  4. Top-Heavy Relief:          Exempt from IRC §416 Top-Heavy Minimums        |
+-------------------------------------------------------------------------------+
|  *Result: LTPTs can defer without jeopardizing plan compliance or costs*     |
+-------------------------------------------------------------------------------+

1. Minimum Coverage Testing Relief (IRC §410(b)(12)): The plan sponsor may elect to exclude all LTPT employees from the denominator and numerator of IRC §410(b) coverage testing.
2. ADP Testing Relief (IRC §401(k)(3)(F)): The employer may elect to exclude all LTPT participants from the Actual Deferral Percentage (ADP) test. The zero or low deferral rates of part-time employees will not drag down the NHCE deferral average or restrict HCE contributions.
3. ACP Testing Relief (IRC §401(m)(12)): If matching contributions or after-tax contributions are provided, LTPT employees can be excluded from the Actual Contribution Percentage (ACP) test.
4. Top-Heavy Relief (IRC §416(i)(4)): If a plan is top-heavy (more than 60% of aggregate account balances belong to Key Employees), the employer is NOT required to make the mandatory 3% top-heavy minimum contribution to LTPT participants. Furthermore, LTPT participants are excluded from determining whether the plan is top-heavy.

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Worked Eligibility Case Studies Across the Transition Years

To master LTPT mechanics for the ASPPA QKA exam, let us examine three detailed multi-year operational case studies under a calendar-year 401(k) plan with semi-annual entry dates (January 1 and July 1):

Case Study 1: The 2024 Pioneer Cohort (3-Year Rule)

Employee: Angela (Age 28)

• Hired: January 15, 2021.
• 2021 Hours: 650 hours (≥ 500h — Qualifying Year 1)
• 2022 Hours: 720 hours (≥ 500h — Qualifying Year 2)
• 2023 Hours: 580 hours (≥ 500h — Qualifying Year 3)
• Evaluation: As of December 31, 2023, Angela completed 3 consecutive 12-month periods with at least 500 hours under the original SECURE Act standard. Pre-2021 hours were not needed.
• Entry Timing: Angela entered the plan on January 1, 2024, as an LTPT participant eligible to make elective deferrals.

Case Study 2: The 2025 Accelerated Cohort (2-Year SECURE 2.0 Rule)

Employee: Brian (Age 24)

• Hired: March 1, 2022.
• 2022 Hours: 480 hours (< 500h — Fails threshold)
• 2023 Hours: 620 hours (≥ 500h — Qualifying Year 1)
• 2024 Hours: 590 hours (≥ 500h — Qualifying Year 2)
• Evaluation:
  • Under the 3-year rule in effect in 2024, Brian had only completed 1 qualifying year by December 31, 2023, so he was not eligible in 2024.
  • On January 1, 2025, SECURE 2.0 §125 takes effect, reducing the standard to 2 consecutive years.
  • Looking back from December 31, 2024, Brian completed 2 consecutive qualifying years (2023 and 2024 with 500+ hours).
• Entry Timing: Brian enters the plan on January 1, 2025, under the new 2-year standard!

Case Study 3: The Broken Consecutive Streak

Employee: Chloe (Age 32)

• Hired: January 1, 2022.
• 2022 Hours: 750 hours (≥ 500h — Qualifying Year 1)
• 2023 Hours: 380 hours (< 500h — Streak broken! Reset to 0)
• 2024 Hours: 800 hours (≥ 500h — New Qualifying Year 1)
• 2025 Hours: 650 hours (≥ 500h — New Qualifying Year 2)
• Evaluation: Because 2023 hours dropped below 500, Chloe's consecutive chain was broken. Her 2022 service cannot be coupled with 2024. She completes her 2 consecutive years at the end of 2025 (2024 and 2025).
• Entry Timing: Chloe enters the plan on January 1, 2026.

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Transitioning from LTPT to Regular Participant ('Graduation')

What happens when an LTPT participant increases their hours and works 1,000 hours in a 12-month computation period? This administrative conversion is known as 'Graduation':

                       The LTPT Graduation Process (1,000 Hours)
┌─────────────────────────────────────────────────────────────────────────────┐
│  Active LTPT Participant completes 1,000 hours in a computation period.     │
│                                     │                                       │
│                                     ▼                                       │
│  Status shifts to FULL STATUTORY PARTICIPANT on 1st day of next plan year!  │
│                                     │                                       │
│  ┌──────────────────────────────────┴──────────────────────────────────┐    │
│  ▼                                                                     ▼    │
│  [New Mandatory Rights]                                 [Testing Changes]   │
│  • Becomes eligible for Employer Matching              • Exclusions Cease   │
│  • Becomes eligible for Profit-Sharing Allocations     • Included in ADP/ACP│
│  • Eligible for Safe Harbor 3% / Match                 • Counted in Coverage│
│  • Retains permanent 500-hour vesting accrual!         • Subject to TopHeavy│
└─────────────────────────────────────────────────────────────────────────────┘

1. Timing of Conversion

An LTPT participant who completes 1,000 hours during a computation period becomes a regular statutory participant on the first day of the plan year following that computation period.

2. Immediate Employer Contribution Entitlement

Upon graduation, the employee is no longer subject to the LTPT employer contribution exclusion. They are entitled to participate in employer matching contributions, discretionary profit-sharing allocations, and safe harbor nonelective contributions on the exact same terms as any regular participant.

3. Loss of Testing Relief

Graduated participants can no longer be excluded from the employer's nondiscrimination tests. Their deferrals must be included in the plan's ADP test, any matching contributions must be included in the ACP test, they count as benefiting employees for IRC §410(b) coverage, and they must receive 3% top-heavy minimum contributions if the plan is top-heavy.

4. Permanent 500-Hour Vesting Accrual Rule

Under proposed Treasury regulations, once an employee earns vesting service under the LTPT rules, they receive a permanent statutory protection:

Permanent Vesting Protection: Once an individual becomes an LTPT participant, all future years of vesting service continue to be credited at the 500-hour standard, even after the employee graduates to regular participant status, and even if they subsequently drop back below 1,000 hours (provided they work at least 500 hours)!

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Comparison: Regular Statutory Participant vs. LTPT Participant

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Critical Exam Traps & Administrative Gotchas

[!CAUTION] Key Exam Traps on LTPT Rules:

1. Pre-2021 Service Never Counts: An exam question presenting an employee with 10 years of continuous 600-hour service prior to 2021 is testing whether you know the lookback restriction. All pre-2021 service is disregarded for both eligibility and vesting.
2. 2024 vs. 2025 Rule Differences: The 3-year standard applied strictly to the 2024 plan year. Beginning January 1, 2025, the standard permanently shifts to 2 consecutive 12-month periods.
3. 403(b) Expansion Effective 2025: Remember that 403(b) plans were not subject to LTPT in 2024; their mandate begins with the 2025 plan year, tracking service back to January 1, 2023.
4. Safe Harbor Exemption Is Intact: A safe harbor 401(k) plan does not have to provide 3% safe harbor contributions to LTPT employees to maintain its ADP/ACP safe harbor exemption.