COBRA Qualifying Events: Complete List with Timelines and Notice Requirements

COBRA administration fails in predictable places. An employee's hours drop below the benefits threshold and nobody treats it as a qualifying event. A divorce is never reported. A termination notice goes out on day 31 instead of day 30. Each of these is a small clerical miss that can carry statutory penalties and — far more expensively — leave the employer holding the bag for claims that should have been the individual's responsibility.

This guide lays out every qualifying event, who becomes eligible because of it, how long coverage runs, and exactly who must notify whom by when.

First: Is Your Plan Even Subject to COBRA?

Federal COBRA applies to group health plans maintained by employers with 20 or more employees on more than 50 percent of typical business days in the previous calendar year. Both full- and part-time employees count, with part-timers counted as a fraction of a full-time employee.

Churches and certain church-related organizations are exempt. Federal government plans are covered by a parallel program rather than COBRA itself.

If you fall below 20 employees, you are not off the hook — most states have "mini-COBRA" continuation laws that apply to smaller employers, with their own durations and notice rules. Those state laws vary considerably and are administered through the insurance carrier rather than the plan.

The Qualifying Events

A qualifying event is an event that, but for COBRA, would cause a loss of coverage under the group health plan. That last part matters: if the event does not actually cause a loss of coverage, it is not a qualifying event.

Events producing 18 months of coverage

These apply to the covered employee and, derivatively, to the covered spouse and dependent children:

The reduction-in-hours event is the one employers miss most often. It has nothing to do with termination. A full-time employee moved to part-time, an employee placed on a leave of absence not otherwise protected, a strike or lockout, a seasonal schedule change — if the hours drop causes a loss of plan eligibility, it is a qualifying event and notice is owed.

Events producing 36 months of coverage

These apply to the spouse and dependent children:

The gross misconduct exception

Termination for gross misconduct is not a qualifying event, and no COBRA rights arise. This exception is narrow, undefined in the statute, and litigated when used. Ordinary performance problems, policy violations, and even most terminations for cause do not meet it. Employers who invoke gross misconduct routinely — or to avoid the administrative burden — invite a claim. Treat it as a rare exception reviewed with counsel, not a checkbox.

Extensions Beyond 18 Months

Two mechanisms extend an 18-month period.

Disability extension — up to 29 months. If a qualified beneficiary is determined by the Social Security Administration to be disabled, and the disability began at any time during the first 60 days of COBRA coverage, the 18-month period may be extended by 11 additional months for all qualified beneficiaries in that family unit. The beneficiary must notify the plan administrator within 60 days of the SSA determination and before the end of the original 18-month period. During the 11-month extension, the plan may charge up to 150 percent of the applicable premium.

Second qualifying event — up to 36 months. If a second qualifying event (death, divorce or legal separation, Medicare entitlement, or loss of dependent status) occurs during an 18-month period, the spouse and dependent children may extend to a total of 36 months from the date of the first qualifying event. Notice must be given within 60 days of the second event.

The Notice Timeline — Who Owes What, and When

This is the operational core of COBRA compliance.

Note the split responsibility. The employer knows about terminations, hour reductions, and deaths — so the employer must notify the plan. The employer generally does not know about a divorce or a child aging off the plan — so the beneficiary must notify. Your plan documents and general notice must clearly explain this to participants, because a beneficiary who was never told cannot be faulted for failing to report.

Most employers who self-administer operate against the 44-day combined clock. Build your process to that number, not to 60.

Election and Payment Deadlines

• Election period: at least 60 days, measured from the later of the date coverage is lost or the date the election notice is provided.
• Initial premium payment: due within 45 days after the date of the COBRA election.
• Subsequent premiums: a grace period of at least 30 days from the due date.
• Retroactivity: coverage is retroactive to the date of the loss of coverage, so there is no gap for a beneficiary who elects at the end of the window and pays within 45 days.

That retroactivity is why the election window creates real exposure. A beneficiary can wait out the full 60 days, incur a significant claim, then elect and pay — and the plan must cover it. This is not a loophole; it is the design.

What You Can Charge

The plan may charge up to 102 percent of the applicable premium — the full cost of coverage plus a 2 percent administrative fee. During an 11-month disability extension, the ceiling rises to 150 percent.

The applicable premium is the total cost of the plan for similarly situated non-COBRA beneficiaries, both employer and employee portions. Getting this calculation wrong in either direction creates problems: undercharging is a fiduciary and cost issue, overcharging is a compliance violation. Our post on calculating COBRA costs walks through the arithmetic, and the Glossary of COBRA Terms  defines applicable premium precisely.

When Coverage Can Be Terminated Early

A plan may cut COBRA coverage short before the maximum period ends when:

1. Premiums are not paid on time (after the applicable grace period)
2. The employer ceases to maintain any group health plan
3. The qualified beneficiary obtains coverage under another group health plan
4. The qualified beneficiary becomes entitled to Medicare after electing COBRA
5. The disability extension applies and the SSA determines the individual is no longer disabled
6. Coverage is terminated for cause on the same basis it would be for an active employee — such as fraud

Early termination requires a written notice of early termination sent as soon as practicable.

The Five Failures That Cost Employers Money

1. Missing the reduction-in-hours event. No termination occurred, so nobody flagged it. Coverage was lost anyway.
2. Blowing the 30/44-day clock. Frequently caused by a delay between the manager's termination decision and the HRIS entry. Trigger COBRA off the benefits-termination date in the system, not off an email.
3. No proof of mailing. COBRA requires a good-faith effort reasonably calculated to reach the beneficiary — first-class mail to the last known address, sent to the spouse separately when the address differs. Keep the mailing log. In litigation, you must prove the notice went out, not that it was received.
4. Failing to send a separate notice to the spouse. A single notice addressed only to the employee can fail the requirement when the spouse is a qualified beneficiary at a known separate address.
5. Calling it gross misconduct. See above.

Working through our COBRA Compliance Checklist [link → /hr-checklist/cobra] surfaces most of these before an auditor does.

Frequently Asked Questions

Is a reduction in hours a COBRA qualifying event?

Yes, if the reduction causes a loss of group health coverage. The employee does not have to be terminated. This includes moves to part-time status, unpaid leaves that are not otherwise protected, and seasonal schedule reductions.

How long does an employer have to notify the plan administrator of a qualifying event?

30 days from the qualifying event for events the employer knows about. If the employer is also the plan administrator, the combined deadline to provide the election notice is 44 days from the qualifying event.

How long do qualified beneficiaries have to elect COBRA?

At least 60 days, measured from the later of the date coverage would be lost or the date the election notice was provided. Coverage elected at the end of that window is retroactive to the date of the loss.

Can we charge more than the premium?

Up to 102 percent of the applicable premium in most cases, and up to 150 percent during an 11-month disability extension.

Does a divorce trigger employer notice obligations?

No — the employee or spouse must notify the plan administrator within 60 days. The employer generally has no way to know. This is why your general notice must clearly explain the beneficiary's reporting duty.

What happens if we simply forget to send a COBRA notice?

Exposure includes statutory penalties per day per qualified beneficiary, excise tax liability, attorneys' fees, and — usually the largest number — responsibility for medical claims the beneficiary would have had covered.

The Bottom Line

COBRA is not conceptually difficult. It is a deadline-driven process that fails when benefits events are not detected quickly and mailing is not documented. Build the trigger off your benefits-termination field, run to the 44-day clock, mail to the spouse separately, and keep the log.

For structured instruction, explore our COBRA Training Courses , review the COBRA FAQs, or browse the full library of HR Compliance Training.