ERISA and COBRA: How Federal Law Governs

The Employee Retirement Income Security Act of 1974 (ERISA) is the statutory foundation that makes COBRA continuation coverage a legally enforceable right rather than an employer courtesy. Understanding how ERISA structures COBRA obligations — and how the Internal Revenue Code and Department of Labor regulations extend those obligations — is essential for anyone evaluating compliance exposure, coverage eligibility, or plan administration responsibilities. This page examines the legislative framework, the operational mechanism it creates, the scenarios where that framework is most consequential, and the boundaries that determine which plans and individuals fall inside or outside federal protection.

Definition and Scope

ERISA, enacted as Public Law 99-272 through the Consolidated Omnibus Budget Reconciliation Act of 1985, amended existing ERISA provisions to impose COBRA obligations on group health plans. The continuation coverage rules are codified at 29 U.S.C. §§ 1161–1168 (ERISA Part 6). A parallel set of rules appears in the Internal Revenue Code at 26 U.S.C. §§ 4980B, which governs excise tax penalties for noncompliance, and in the Public Health Service Act at 42 U.S.C. §§ 300bb-1 through 300bb-8, which covers governmental plans.

Scope limitations under ERISA are precise:

Plans maintained by private-sector employers with 20 or more employees on at least 50 percent of typical business days in the preceding calendar year are subject to federal COBRA (DOL, Employee Benefits Security Administration).
Church plans, as defined under ERISA § 3(33), are exempt from federal COBRA.
Governmental plans — those sponsored by federal, state, or local governments — are not subject to ERISA but are covered under the parallel Public Health Service Act provisions.
Small employers below the 20-employee threshold fall outside federal COBRA; those employers may instead be subject to state "mini-COBRA" laws, detailed in the regulatory context for COBRA administration.

ERISA's preemption clause, codified at 29 U.S.C. § 1144, supersedes most state laws that "relate to" employee benefit plans, which means private-sector plan sponsors cannot rely on more permissive state rules to reduce federal COBRA obligations.

How It Works

ERISA creates a three-party structure: the plan sponsor (typically the employer), the plan administrator (which may be the same entity or a designated third party), and the qualified beneficiary. Each party carries distinct statutory obligations triggered by a qualifying event.

The operational sequence under ERISA and its implementing regulations (29 C.F.R. Part 2590) proceeds in the following discrete phases:

Qualifying event occurs — A defined triggering event under 29 U.S.C. § 1163 (e.g., termination of employment, reduction in hours, divorce, loss of dependent status) causes a qualified beneficiary to lose group health coverage.
Employer notifies plan administrator — The employer must notify the plan administrator within 30 days of the qualifying event (29 C.F.R. § 2590.606-2).
Plan administrator issues election notice — Within 14 days of receiving the employer's notice, the administrator must provide the qualified beneficiary with a written election notice meeting DOL content requirements.
Election period opens — Qualified beneficiaries have 60 days from the later of coverage loss or the election notice date to elect continuation coverage (29 U.S.C. § 1165).
Premium payment — After election, the beneficiary has 45 days to submit the initial premium payment, with a 30-day grace period applying to subsequent monthly payments.
Coverage continues for the applicable duration — 18 months, 29 months (with disability extension), or 36 months, depending on qualifying event type and beneficiary classification.

The DOL's Employee Benefits Security Administration (EBSA) holds primary civil enforcement authority under ERISA. The IRS enforces the excise tax under IRC § 4980B, which imposes a penalty of $100 per day per affected beneficiary for each day of a COBRA violation, with an annual cap per family of $200 per day (IRS, Publication 969).

Common Scenarios

Involuntary termination is the most frequent qualifying event under ERISA Part 6. When an employee is terminated for reasons other than gross misconduct, ERISA mandates that the employer notify the plan administrator within 30 days. The gross misconduct exception — which eliminates COBRA entitlement entirely — is not defined in the statute, leaving determination to plan administrators and, ultimately, to federal courts applying common law standards.

Reduction in hours that causes a loss of eligibility under plan terms triggers the same 30-day employer notification requirement, even when the employee remains actively employed. This scenario arises frequently in shift restructuring and part-time transitions.

Divorce or legal separation represents one scenario where ERISA places the notification burden on the employee or dependent rather than the employer. The qualified beneficiary (the spouse) must notify the plan administrator within 60 days of the divorce or legal separation. Failure to provide timely notice extinguishes the COBRA right.

Multi-employer plan situations introduce complexity because the plan itself — rather than any single contributing employer — typically serves as plan administrator, and contribution obligations are governed by collective bargaining agreements operating alongside ERISA.

The COBRA administration home page provides orientation to how these scenarios connect across the full compliance lifecycle.

Decision Boundaries

ERISA's framework contains explicit thresholds that determine whether federal coverage obligations apply at all, and secondary boundaries that determine coverage duration and scope.

Federal COBRA applies vs. does not apply:

Factor	Federal COBRA Applies	Federal COBRA Does Not Apply
Employer type	Private sector	Church; governmental
Employee count	20 or more	Fewer than 20
Plan type	Group health plan	Excepted benefits (e.g., stand-alone dental/vision below threshold)
Coverage loss cause	Qualifying event under § 1163	Voluntary disenrollment without a qualifying event

Duration boundaries under 29 U.S.C. § 1162 turn on the type of qualifying event and the classification of the beneficiary:

An 18-month period applies to employees who lose coverage through termination or reduction in hours.
A 36-month period applies to spouses and dependents whose loss arises from divorce, legal separation, Medicare entitlement of the employee, or loss of dependent child status.
The disability extension adds 11 months (for a total of 29 months) when a qualified beneficiary is determined disabled by the Social Security Administration within the first 60 days of COBRA coverage, provided the beneficiary notifies the plan administrator within 60 days of the SSA determination and before the 18-month period expires (29 U.S.C. § 1162(2)(A)(v)).

Interaction with other federal statutes creates additional decision layers. HIPAA's portability provisions, the ACA's market reform rules incorporated into ERISA via the Affordable Care Act amendments, FMLA's leave-related coverage rules, and Medicare Secondary Payer requirements each impose obligations that can expand, modify, or intersect with baseline ERISA COBRA duties. These interactions are not resolved by ERISA alone — plan administrators must apply the full stack of applicable federal law when evaluating any specific fact pattern.

References

The law belongs to the people. Georgia v. Public.Resource.Org, 590 U.S. (2020)