Whether you should keep your employer health insurance when you retire depends on three things: whether the employer still subsidizes a meaningful share of the premium, whether you’re already 65 (and therefore on Medicare as your primary coverage), and whether you have a spouse or dependents who need the plan. For retirees paying full freight for a retiree plan that only wraps around Medicare, dropping it for Medicare plus a supplement usually costs less. For retirees whose former employer picks up a real portion of the premium, or who retire before 65 and need to bridge to Medicare eligibility, keeping it often wins.
Fewer than one in four large employers still offer retiree health benefits at all, so for many people the question is less “should I keep it?” and more “what replaces it?”
Start With Your Age at Retirement
If you retire at 65 or later, Medicare becomes your primary coverage the moment you enroll, and any employer retiree plan pays second. Medicare pays first on a hospital bill, and the retiree plan picks up some or all of what Medicare doesn’t. That coordination is automatic, but it fundamentally changes what you’re paying for: the retiree premium buys you supplemental coverage, not primary coverage.
If you retire before 65, the calculation flips. You have no Medicare yet, and the employer plan may be the cheapest and broadest coverage available to you until you hit eligibility. Bridging that gap through the Health Insurance Marketplace or COBRA is possible, but expensive enough that a subsidized retiree plan often beats both.
Read the Summary Plan Description Before You Decide
No federal law requires a private employer to offer retiree health insurance, and nothing stops one from cutting or eliminating benefits it already provides unless it made a binding promise not to.1U.S. Department of Labor. Can the Retiree Health Benefits Provided by Your Employer Be Cut? The document that controls everything is the Summary Plan Description, which your employer’s benefits office must provide for free.2U.S. Department of Labor. Plan Information Look for language like “the company reserves the right to modify, revoke, suspend, terminate, or change the program at any time.” If that clause is in there, the employer can change your benefits after you retire regardless of what a recruiter once told you.
Focus on three things in the SPD: what you’ll pay in premiums and out-of-pocket costs, how the plan coordinates with Medicare once you’re 65, and whether the employer has reserved the right to change the deal later. Some employers still offer generous retiree plans with subsidized premiums and the same provider networks active employees use. Others shift retirees onto a separate plan with higher deductibles, narrower networks, and full-cost premiums. A growing number simply hand retirees a fixed monthly stipend to buy coverage on the open market.
Running the Cost Comparison
Add up the annual cost of your employer retiree plan: premiums, deductibles, copays, and out-of-pocket maximum. Then compare that to the alternative. For a retiree 65 or older, the alternative is Original Medicare (Part B at $202.90 per month in 2026, plus a Medigap plan and a Part D drug plan) or a Medicare Advantage plan.3Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles Part A is free for most people who paid Medicare taxes for at least ten years.4HHS.gov. Who Is Eligible for Medicare
For a retiree under 65, the alternative is a marketplace plan (with premium tax credits if your retirement income qualifies) or COBRA. Losing job-based coverage opens a 60-day Special Enrollment Period on the marketplace, and many early retirees find their income drops enough to qualify for substantial subsidies they never received while working.5HealthCare.gov. Health Care Coverage for Retirees
Higher-Income Retirees Pay More for Medicare
If your income is above $109,000 single or $218,000 joint, factor in IRMAA, the Income-Related Monthly Adjustment Amount that raises your Medicare Part B and Part D premiums.3Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles Medicare bases the surcharge on your tax return from two years prior, so 2026 premiums reflect 2024 income. At the top bracket, the Part B premium reaches $689.90 per month, and Part D adds up to $91.00 on top of your plan’s regular premium. This catches many retirees off guard in their first year or two on Medicare, because their last working year’s income was higher than their retirement income. You can file an appeal with Social Security using a life-changing event (retirement itself qualifies) to have the surcharge recalculated based on current income.
Traps That Can Wreck the Math
The Part B Late Enrollment Penalty
Most employer retiree plans require you to enroll in both Medicare Part A and Part B as soon as you’re eligible. Skip Part B thinking you’ll save the $202.90 monthly premium, and the retiree plan can reduce or deny your benefits, leaving you with the primary bills Medicare would have paid. The penalty for delaying Part B is 10% added to your monthly premium for every full 12-month period you were eligible but didn’t enroll, and it lasts as long as you have coverage.6Medicare. Avoid Late Enrollment Penalties The penalty resets only if you qualify for a Special Enrollment Period tied to coverage through current employment. Retiree coverage doesn’t count. COBRA doesn’t count either.7Medicare. When Does Medicare Coverage Start
Creditable Drug Coverage
Your employer must tell you every year whether the retiree plan’s prescription drug benefit is “creditable,” meaning it covers at least as much as a standard Medicare Part D plan.8Centers for Medicare & Medicaid Services. Model Notice Letters If it’s creditable, you can safely skip Part D as long as the employer plan lasts. If it’s not, you need a standalone Part D plan during your Initial Enrollment Period, or you’ll pay 1% of the national base beneficiary premium ($38.99 in 2026) for every month you went uncovered, permanently.6Medicare. Avoid Late Enrollment Penalties Read the notice when it arrives. If your employer hasn’t sent one, ask in writing.
HSA Contributions Stop at Medicare Enrollment
If you’ve been building a Health Savings Account through a high-deductible plan, enrolling in any part of Medicare ends your ability to contribute. There’s a further trap: when you sign up for Part A after 65, Medicare backdates coverage up to six months. Contributions during that lookback period become excess contributions subject to a 6% excise tax. Stop HSA contributions at least six months before you plan to enroll in Medicare. Money already in the account stays yours to spend tax-free on qualified medical expenses. And note that starting Social Security at 65 or later triggers automatic Part A enrollment, which ends HSA eligibility whether you meant to sign up or not.
Your One Guaranteed Medigap Window
If you keep employer coverage now and plan to switch to Medicare with a Medigap policy later, know what you’re giving up. You get one guaranteed-issue window to buy any Medigap plan sold in your area: six months starting the month you turn 65 and are enrolled in Part B.9Medicare. Get Ready to Buy During that window, insurers can’t deny coverage, charge more for pre-existing conditions, or make you wait. Once it closes, most insurers can use medical underwriting to raise your premium or reject you outright. A few states add annual protections around your birthday, but the federal window is the only one you can count on everywhere.
COBRA as a Bridge, Not a Destination
Retirement counts as a qualifying event for COBRA, so you’re entitled to continue your employer’s group plan for up to 18 months after your last day.10U.S. Department of Labor. FAQs on COBRA Continuation Health Coverage for Workers You’ll pay up to 102% of the full premium, meaning both your old share and the share your employer was covering.11eCFR. 26 CFR 54.4980B-8 – Paying for COBRA Continuation Coverage For many people that runs $700 to $1,500 a month or more. You have 60 days from the election notice to decide.12U.S. Department of Labor. COBRA Continuation Coverage
COBRA works well as a short bridge, particularly if you’re a few months from 65 or want to preserve your current network briefly. It works poorly as a long-term plan, because it costs the same as active-employee coverage without the employer subsidy and doesn’t protect your Medicare enrollment window. If you turn 65 while on COBRA, your Special Enrollment Period is based on when your employment actually ended, not when COBRA runs out. Miss that window and you’ll owe the permanent Part B penalty. Sign up for Medicare during your Initial Enrollment Period: the seven months starting three months before the month you turn 65. COBRA applies only to employers with 20 or more employees; some states have “mini-COBRA” laws that extend similar rights at smaller employers, with coverage periods varying by state.
If a Spouse or Dependents Are on the Plan
Many employer retiree plans still cover a spouse and dependent children, but the terms usually change at retirement. Employer subsidies shrink or disappear, and premiums that felt manageable while you were working can jump sharply. Dependent children can remain on most plans until 26 under federal rules; beyond that they lose eligibility unless a disability exception applies.
If your spouse is younger than 65 and not yet eligible for Medicare, the retiree plan may be their best option, especially where marketplace plans in your area are expensive or have narrow networks. Check the SPD for what happens if you die first. Some plans let a surviving spouse continue coverage (often at higher cost, because the subsidy tied to your service record no longer applies), and others terminate coverage entirely. A surviving spouse who loses retiree coverage can elect COBRA for up to 36 months (double the retiree’s 18-month window) or use a 60-day Special Enrollment Period on the marketplace.10U.S. Department of Labor. FAQs on COBRA Continuation Health Coverage for Workers
Deadlines to Hit Either Way
Employers offering retiree health benefits typically give you 30 to 60 days before your retirement date to elect or decline coverage. Many plans allow only a one-time election; miss the deadline and you may lose access permanently. Some plans allow re-enrollment during annual open enrollment periods, but that’s far from universal, so confirm it in writing before you decline.
If you keep the employer plan, finish the enrollment paperwork on time and confirm whether the plan requires proof of Medicare enrollment. If you drop it, enroll in Medicare Parts A and B during your Initial Enrollment Period, pick up a Part D plan (unless your employer confirms drug coverage is creditable), and shop Medigap during your six-month guaranteed-issue window. The penalties for delayed Medicare enrollment are permanent, and most employer retiree plans won’t let you back in once you’ve declined.