Leaving a job before age 65 opens a coverage gap that catches many workers off guard: the employer health plan usually ends, but Medicare has not started. A federal law known as COBRA lets a departing worker keep that same job-based plan for a stretch of time, which can be a lifeline for someone with ongoing treatment or a favorite doctor. The catch is the price. Once the employer stops chipping in, the full cost of the plan lands on the former employee, and the monthly bill can be several times what the paycheck deduction used to be.
What COBRA Actually Continues
COBRA, short for the Consolidated Omnibus Budget Reconciliation Act, requires many group health plans to offer temporary continuation of the exact coverage a worker already had. According to the U.S. Department of Labor, this continuation generally lasts up to 18 months after a qualifying event such as leaving a job or having hours cut below the plan’s threshold. The plan stays identical, meaning the same network, the same deductible, and the same prescription coverage carry over without a break.
Certain situations stretch the window further. When a second qualifying event occurs during the initial period, or when a beneficiary is disabled, coverage can extend to 29 or even 36 months. For a 63-year-old who retires early, 18 months of COBRA can bridge nearly the entire distance to Medicare eligibility at 65, which is one reason the option is so valuable to older workers despite the cost.
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Why the Premium Comes as a Shock
While employed, most workers see only their share of the premium taken out of a paycheck, often a small fraction of the true cost. Under COBRA, the former employee pays the entire premium: the old employee share, plus the amount the employer used to contribute, plus an administrative charge. The Labor Department notes that a plan may bill up to 102 percent of the total cost of the coverage, with that extra two percent covering administration.
In practice, that can turn a $150 monthly deduction into a bill of $700 or more for an individual, and well over $1,500 for family coverage, since employers typically fund the larger portion of a group premium. For a beneficiary who continues coverage during the disability extension, the plan is allowed to charge up to 150 percent of the cost during those additional months. The Department of Labor’s COBRA questions and answers spell out these premium limits and the events that trigger eligibility.
Deadlines That Cannot Be Missed
COBRA runs on a strict clock. After a qualifying event, the plan administrator must send an election notice, and the worker generally has 60 days to decide whether to continue coverage. Choosing COBRA is retroactive to the date coverage would have otherwise ended, so no gap opens up, but the first premium payment is also due within a set window. Missing either deadline can forfeit the right to continue the plan entirely.
Because coverage is retroactive, some people wait to see whether they need care before electing, then enroll within the 60-day window if a medical bill arrives. That strategy carries real risk, since a serious illness during an unelected period could leave large charges uncovered if paperwork or payment slips past the deadline. Anyone weighing it should track the exact dates on the election notice closely.
Comparing the Alternatives
The full-freight price of COBRA makes it worth checking against other options before signing up. Losing job-based coverage is a qualifying life event that opens a special enrollment period on the Affordable Care Act marketplace, where a plan with income-based subsidies may cost far less than continued group coverage. A spouse’s employer plan can also be an entry point during its own special enrollment window.
COBRA still wins in specific cases: when a worker is mid-treatment and wants to keep the same doctors and network, when the deductible has already been met for the year, or when no comparable marketplace plan covers the same specialists. Timing can also tilt the decision, since electing COBRA and later switching to a marketplace plan outside of open enrollment is not always possible, so a worker who guesses wrong may be locked into the more expensive option until the next enrollment period. The right move depends on the numbers and the health situation, but the decision should be made with the real premium in hand, not the paycheck figure that no longer applies once the employer’s contribution stops. For an early retiree counting on savings to last decades, the difference between a subsidized marketplace plan and full-price COBRA can amount to thousands of dollars a year.
The Medicare Enrollment Trap
One detail catches early retirees who lean on COBRA to reach age 65: the coverage does not shield a person from a Medicare late-enrollment penalty. Medicare does not count COBRA as coverage based on current employment, so the eight-month special enrollment period for Part B starts when a person stops working, not when the COBRA plan finally runs out, according to Medicare. A retiree who assumes COBRA can stand in for Medicare until the plan ends can slip past that window without noticing.
The cost of that mistake is permanent. Someone who delays Part B and does not qualify for a special enrollment period owes a late penalty of 10 percent of the premium for each full 12-month period the enrollment was postponed, added to the standard Part B premium of $202.90 a month in 2026 and paid for as long as the person stays on Medicare. Because Medicare generally becomes the primary payer at 65, COBRA can also pay less than expected during any overlap. For most people bridging to Medicare, the safer course is to sign up for Part B at 65 and treat COBRA as a supplement rather than a substitute.
This article was researched and drafted with the assistance of AI and reviewed by The Financial Wire editorial team.
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Warren Cohen is a finance writer based in Phoenix, Arizona, covering personal finance topics including credit, banking, and beginner investing. He earned his degree in business administration from Arizona State University and began his career working in consumer finance, where he gained direct experience with lending and credit systems. He now writes for personal finance websites and fintech platforms, focusing on clear, practical content that helps readers make informed financial decisions.
