Employer Coverage and COBRA

Employer-sponsored health insurance is the most common source of coverage for working-age adults in the United States. Understanding how workplace coverage works — how benefits are structured, when you can enroll, and what happens if you lose your job — is essential knowledge for anyone employed in the US. The federal law known as COBRA also provides important continuation rights when employment-based coverage ends.

How employer health plans work

When an employer offers health insurance, it typically negotiates a group plan with one or more insurers and pays a portion of the monthly premium on behalf of employees. Employees pay the remaining share through payroll deductions, pre-tax in most cases.

Employers generally offer one or more plan types — HMO, PPO, HDHP, or others — each with different premium levels, network restrictions, deductibles, and copays. Employees select from the available options during an annual open enrollment period, which typically occurs in the fall for coverage starting in January. Outside open enrollment, changes are permitted only if you experience a qualifying life event, such as getting married, having a child, or your spouse losing their own coverage.

The Affordable Care Act requires that employer plans cover the same essential health benefits as Marketplace plans — including preventive care, maternity care, mental health services, and prescription drugs — though large employer plans have some flexibility in how they deliver these benefits.

Adding dependents and managing changes

Most employer plans allow you to add dependents — a spouse, domestic partner (depending on the plan), and children — during open enrollment or within a defined window after a qualifying life event such as a birth or marriage. You can add a newborn or adopted child even outside open enrollment; there is typically a defined number of days from the qualifying event to make this change.

Dependent children can generally remain on a parent’s employer plan until age 26, regardless of whether they are students, married, or living at home. This ACA provision applies to all plans that cover dependents.

When your circumstances change — income changes, a new job, your spouse gains coverage — it may be worth reviewing whether the current plan still makes sense compared to other options. HR departments and benefits administrators can explain what changes are allowed mid-year and what documentation is needed.

What COBRA continuation coverage is

COBRA — the Consolidated Omnibus Budget Reconciliation Act — is a federal law that requires most employer group health plans to allow employees and their dependents to continue the same plan for a period after certain qualifying events that would otherwise end their coverage.

Qualifying events for employees include voluntary or involuntary job loss (except termination for gross misconduct) and reduction in hours below the minimum threshold for coverage. Qualifying events for dependents include divorce or legal separation from the covered employee, the employee becoming eligible for Medicare, a dependent child reaching the age limit for the plan, and the death of the covered employee.

COBRA is available for plans sponsored by employers with 20 or more employees. Some states have “mini-COBRA” laws that extend similar rights to employees of smaller employers — check your state’s labor agency for details.

COBRA costs and how to elect it

Under COBRA, you can keep the exact same group health plan you had as an active employee — same network, same benefits, same formulary. The key change is cost: as an active employee, your employer paid a portion of the premium. Under COBRA, you pay the full amount — the employee share plus the employer share plus a small administrative fee. This can be a substantial monthly cost.

You have a defined window after your qualifying event to elect COBRA continuation coverage — the exact timeframe is set by federal rule and your plan administrator must notify you of it in writing. You do not have to elect COBRA immediately; you can wait and decide, but your coverage will be retroactive to the date of the qualifying event if you elect within the allowed window.

Marketplace as a COBRA alternative

Losing job-based coverage is a qualifying life event that opens a special enrollment period in the Health Insurance Marketplace. This means you have a window to enroll in a Marketplace plan as an alternative to COBRA.

For many people, Marketplace plans are significantly less expensive than COBRA because income-eligible enrollees receive Advanced Premium Tax Credits (APTC) and possibly Cost-Sharing Reductions (CSR). Compare the total cost — premium plus expected out-of-pocket costs for care — for both COBRA and available Marketplace plans before deciding.

If you elect COBRA now and change your mind, you can drop COBRA and enroll in a Marketplace plan during the annual open enrollment period. You may also be able to switch to a Marketplace plan if you exhaust your COBRA benefits.

Comparing your options after leaving a job

Feature	Active employee plan	COBRA continuation	Marketplace plan
Who it covers	Active employees and eligible dependents	Former employees and covered dependents after a qualifying event	Anyone during open enrollment or with a qualifying life event
Premium cost	Employer pays a portion; employee pays rest pre-tax through payroll	You pay 100% of the full premium plus up to 2% administrative fee	Full premium; APTC reduces cost for eligible income levels
Coverage continuity	Ongoing while employed	Exact same plan — same network, formulary, and benefits	New plan; network and formulary may differ from prior coverage
Duration	While employed and meeting eligibility	Up to 18 months for job loss or hour reduction; up to 36 months for other events	Renews annually; no time limit
Subsidy available	No government subsidy; pre-tax contributions reduce taxable income	No government subsidy	APTC and CSR if income qualifies
Enrollment window	Annual open enrollment plus qualifying life events	60-day election window after qualifying event; coverage is retroactive if elected	Annual open enrollment plus qualifying life events

What this looks like in practice

Imagine Thomas, who has worked at a marketing firm for four years and has been enrolled in the company PPO plan. His share of the monthly premium is $195; his employer pays the remaining $550. In August, he is laid off.

Thomas receives a COBRA election notice. He has 60 days to decide. Under COBRA, he can keep the exact same PPO — same doctors, same formulary, same deductible — but he will now pay the full combined premium of $745 plus a 2% administrative fee, totaling roughly $760 per month.

Thomas also opens a Marketplace special enrollment period triggered by his loss of coverage. Because his income for the remainder of the year will be substantially lower, he qualifies for a significant Advanced Premium Tax Credit. A comparable Silver plan in his area has a net monthly premium of approximately $130 after the APTC is applied. The Marketplace plan’s deductible is slightly higher than his old employer plan, but the $630-per-month premium difference makes it the better financial choice for a healthy stretch.

Thomas enrolls in the Marketplace Silver plan. If he secures new employment with benefits before the plan year ends, his employer coverage will be a qualifying event that he can use to make another plan change. He notes that had he been midway through expensive ongoing treatment, he might have chosen COBRA instead to preserve continuity with his existing specialist team.

Step by step: what to do when you lose employer coverage

1. Confirm the exact last date your employer coverage is active — this is typically your last day of employment or the last day of the employment month, depending on your plan’s terms.
2. Review the COBRA election notice your plan administrator is required to mail you. Federal rules set the timeframe for sending this notice. Read it carefully for the election deadline and premium amount.
3. Open the Health Insurance Marketplace — healthcare.gov or your state platform — and browse plans using the special enrollment period triggered by your loss of coverage.
4. Compare COBRA and Marketplace options side by side: monthly premiums, deductibles, out-of-pocket maximums, and whether your current doctors and pharmacy are in-network for each option.
5. If you are midway through an active course of treatment or referral chain, confirm those providers are included in any Marketplace plan’s network before dropping COBRA.
6. Make your decision within the COBRA election window. If you elect COBRA, your coverage is retroactive to the date your prior coverage ended, so there is no gap in coverage even if you wait until near the deadline to decide.
7. If you choose a Marketplace plan instead, confirm your coverage effective date, pay your first premium on time, and set up any prescription transfer to an in-network pharmacy.
8. Check whether your income drop makes you eligible for Medicaid — apply through healthcare.gov at any time; Medicaid has no enrollment period.

Documents and terms you’ll see

When navigating employer coverage and COBRA, you will encounter the following terms in your HR benefits paperwork, enrollment systems, and COBRA election notices:

• COBRA — the federal law requiring most employer group health plans to offer continuation coverage for a defined period after a qualifying event
• Open enrollment — the annual window when employees can enroll in or change their employer health plan; changes outside this window require a qualifying life event
• Qualifying life event — a change in circumstances — job loss, marriage, birth of a child — that allows mid-year plan changes under employer or Marketplace rules
• Special enrollment period — the Marketplace enrollment window that opens after a qualifying life event; typically 60 days from the event
• FSA — Flexible Spending Account; a pre-tax employer benefit for medical expenses; funds are generally forfeited if unused by year-end and the account does not transfer when you leave
• HSA — Health Savings Account; a portable tax-advantaged account available with High-Deductible Health Plans; funds roll over indefinitely and travel with you between employers
• Out-of-pocket maximum — the annual cap on your covered cost-sharing; once reached the plan pays 100% of in-network covered services
• Premium — the monthly cost of coverage; under COBRA you pay both the employee and employer share plus an administrative fee