Excise Tax Penalties Under IRC Section 4980B

IRC Section 4980B establishes the federal excise tax mechanism that penalizes failures to offer or maintain COBRA continuation coverage as required by the Internal Revenue Code. This page covers the statutory penalty structure, how the tax accrues, the scenarios that most commonly trigger liability, and the boundaries that determine whether an excise tax applies. Understanding this penalty framework is essential for plan sponsors and administrators seeking to assess financial exposure from COBRA noncompliance.

Definition and scope

IRC Section 4980B, codified at 26 U.S.C. § 4980B, imposes an excise tax on any "failure to satisfy continuation coverage requirements" under a group health plan. The statute targets violations of the continuation coverage rules set out in IRC §§ 4980B(f), which mirror the COBRA framework established in the Consolidated Omnibus Budget Reconciliation Act of 1985 (Pub. L. 99-272).

The tax is assessed against the employer that maintains the group health plan, not the plan itself or the plan administrator (unless the plan administrator is also the employer). For multiemployer plans, the excise tax falls on the multiemployer plan. The Internal Revenue Service (IRS) has primary enforcement authority over Section 4980B penalties, distinguishing this mechanism from the Department of Labor's civil enforcement authority under ERISA § 502, which is addressed separately on the Regulatory Context for COBRA Administration page.

The base penalty rate is $100 per day for each day a qualified beneficiary is not offered or maintained on continuation coverage in violation of the requirements (26 U.S.C. § 4980B(b)(1)). Where a single failure affects more than one qualified beneficiary from the same family, the $100-per-day rate applies per beneficiary, not per family unit — though a statutory family cap limits the total for unintentional violations to $200 per day per family (26 U.S.C. § 4980B(c)(3)).

A separate minimum penalty of $2,500 applies per qualified beneficiary for each failure when the employer knew, or should have known, of the violation (26 U.S.C. § 4980B(c)(1)). That minimum rises to $15,000 where the failure is more than de minimis and is attributable to reasonable cause rather than willful neglect — and the cap may be removed entirely for willful violations.

How it works

The excise tax accrues automatically from the first day of noncompliance. The mechanism operates as follows:

  1. Triggering event — A qualifying event occurs (such as termination of employment or reduction in hours) that obligates the plan to offer COBRA continuation coverage to affected qualified beneficiaries.
  2. Notice obligation arises — The employer must notify the plan administrator within 30 days; the administrator then has 14 days to deliver the COBRA election notice to qualified beneficiaries (29 C.F.R. § 2590.606-4).
  3. Failure commences — If the required notice is not provided, or coverage is not made available on a timely basis, the $100-per-day clock begins running on the date the failure first occurs.
  4. Audit or self-reporting — Under IRS Form 8928, employers are required to self-report excise taxes for failures related to group health plan requirements, including Section 4980B violations, and remit the applicable tax (IRS Form 8928 instructions).
  5. Correction window — If a failure is discovered and corrected within 30 days after the employer knew or should have known of the failure, and it resulted from reasonable cause rather than willful neglect, the excise tax may be waived under the reasonable cause exception at 26 U.S.C. § 4980B(c)(4).

The IRS may also impose the tax on a per-plan, per-year maximum of $500,000 for unintentional failures (26 U.S.C. § 4980B(c)(3)(C)). This ceiling does not apply to willful violations.

Common scenarios

The most frequent fact patterns that generate Section 4980B excise tax exposure include:

Decision boundaries

The statute creates three distinct tiers of liability based on culpability and correction timing:

Failure Type Per-Day Rate Minimum Penalty Annual Cap
Unintentional, corrected within 30 days of discovery $100/beneficiary Waivable $500,000
Unintentional, not corrected within 30 days $100/beneficiary $2,500/beneficiary $500,000
Willful $100/beneficiary $15,000/beneficiary No statutory cap

Two boundary conditions determine which tier applies:

Reasonable cause vs. willful neglect. Reasonable cause exists when the employer had established administrative procedures and the failure resulted from an isolated lapse beyond reasonable control. Willful neglect is established when the employer was aware of the requirement and either deliberately disregarded it or exhibited reckless indifference. The IRS examines whether written COBRA procedures existed, whether responsible personnel received training, and whether the employer acted promptly upon discovering the error.

De minimis exception. A failure is de minimis if it affects no more than 1% of participants and beneficiaries who had the opportunity to benefit, and the employer acted in good faith (26 U.S.C. § 4980B(d)(2)). Employers with fewer than approximately 100 plan participants can more readily qualify for this exception, though the good-faith and correction requirements still apply.

The Section 4980B excise tax regime operates independently of ERISA civil penalties, and a single compliance failure can trigger liability under both frameworks simultaneously. Employers assessing their overall exposure should consult both the IRS enforcement framework under Section 4980B and the DOL civil enforcement framework described at /regulatory-context-for-cobra-administration.

References

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