The IRS provided guidance addressing long-term, part-time employee eligibility rules under Code Sec. 403(b)(12)(D), which apply to certain 403(b) plans beginning in 2025. The IRS also announced a delayed applicability date for related final regulations under Code Sec. 401(k).

Application of Code Sec. 403(b)(12)

The IRS provided guidance in the form of questions and answers on the requirement that 403(b) plans allow certain long-term, part-time employee to participate. The IRS clarified that the long-term, part-time employee eligibility rules only apply to 403(b) plans that are subject to title I of ERISA. Thus, a governmental plan under ERISA §3(32) is not subject to the long-term, part-time employee eligibility rules because it is not subject to title I pursuant to ERISA §4(b). The guidance also provides that 403(b) plans can continue to exclude student employees regardless of whether the individual qualifies under long-term, part-time employee eligibility rules.

Future Guidance

The guidance for 403(b) plans applies for plan years beginning after December 31, 2024. The IRS anticipates issuing proposed regulations applicable to 403(b) plans that are generally similar to regulations applicable to 401(k) plans.

Applicability Date for 401(k) Regulations

The IRS also addressed the applicability date of rules for 401(k) plans. Final regulations related to long-term, part-time employee eligibility rules will apply no earlier than to plan years beginning on or after January 1, 2026, the IRS said.