Can I Drop Employer Health Insurance for Medicare?

Updated: April 1, 2026

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Key Takeaways
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Dropping employer health insurance for Medicare is allowed; employer size determines which plan pays your claims first.

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Medicare Part B costs $202.90 per month in 2026, up from $185.00 in 2025, per CMS.

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You have eight months after employer coverage ends to enroll in Part B penalty-free, per SSA.

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The Part B late enrollment penalty is 10% per year and permanent, according to Medicare.gov.

Can You Drop Employer Health Insurance to Switch to Medicare?

You can drop employer health insurance for Medicare at any time once you're eligible. No federal law requires you to keep your employer plan, though signing up for Medicare while covered by a private employer plan follows different rules depending on whether your employer has 20 or more employees.

At employers with 20 or more employees, the employer plan pays claims first while you're actively working, and Medicare pays second. At employers with fewer than 20 employees, Medicare pays first even while you're employed.   

Your next step hinges on three options: drop employer coverage now, wait until retirement, or run both plans at once. Costs and deadlines differ across all three. Medicare's coordination rules with employer health insurance determine your out-of-pocket exposure and dictate when you can enroll without a penalty.

How Employer Size Changes Your Medicare Decision

Employer size directly controls which plan pays your medical claims first when you're eligible for Medicare. Employers with 20 or more employees must treat Medicare Part B as the secondary payer while you work, so the employer plan covers claims first and Medicare fills the gap. 

At employers with fewer than 20 employees, Medicare pays primary even while you're actively employed. At a small employer, delaying Part B enrollment leaves Medicare as the primary payer with no plan picking up the balance, which means you absorb 100% of costs Medicare doesn't cover.

Employer Size
Who Pays First
What You Should Do

20 or more employees

Employer plan pays primary; Medicare pays secondary

You can delay Part B while actively working without a penalty; enroll within 8 months of employment or coverage ending, per SSA

Fewer than 20 employees

Medicare pays primary even while you're employed

Enroll in Medicare Part B when first eligible at 65 to avoid paying claims your employer plan won't cover

When Can You Drop Employer Coverage Without a Late Enrollment Penalty?

The special enrollment period for Medicare Part B gives you eight months from the date your active employment ends or your employer coverage ends, whichever comes first, to enroll without a late penalty. This eight-month clock starts at the end of active employment, not on the day you notify Medicare.

Losing employer coverage counts as a qualifying life event that activates this window. Missing it means you must wait for the Medicare General Enrollment Period, which runs January 1 through March 31 each year, with Part B coverage starting July 1.

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COBRA DOESN'T PROTECT YOU FROM THE PART B PENALTY

COBRA continuation coverage does not count as active employer-based coverage for the Part B special enrollment period, according to Medicare.gov. Enrolling in COBRA after leaving your job doesn't extend or replace your eight-month window. 

If you rely on COBRA and miss the eight-month deadline, you'll pay the Part B late enrollment penalty and must wait for the General Enrollment Period to sign up. Contact the Social Security Administration at ssa.gov before your employment ends to confirm your specific deadline.

How Much Does Medicare Cost After You Drop Employer Insurance in 2026?

Once you drop employer insurance, Medicare Part B costs $202.90 per month in 2026, a $17.90 increase from 2025. Most active employees contribute an average of 28% of their employer plan premium, since employers usually cover 70% to 80% of the total group cost, per the Agency for Healthcare Research and Quality (AHRQ), Medical Expenditure Panel Survey-Insurance Component (MEPS-IC), so switching to Medicare changes your premium structure. 

Adding the $38.99 average Part D premium brings the monthly baseline to roughly $242. High earners above $109,000 in modified adjusted gross income (MAGI) for individuals pay higher premiums through income-related monthly adjustment amounts (IRMAA). 

People who choose Medicare Advantage over Original Medicare trade some provider flexibility for lower monthly premiums, with many plans at $0 beyond the Part B cost.

Coverage
2026 Monthly Cost

Medicare Part A

$0 for most people (free with 40 or more work quarters)

Medicare Part B

$202.90 standard premium (higher with IRMAA above $109,000 MAGI for individuals)

Medicare Part D (average)

$38.99 national base beneficiary premium

Medicare Advantage (Part C)

Varies by plan; many plans at $0 beyond Part B premium

Medicare Supplement (Medigap)

Varies by plan letter and insurer

Should You Drop Employer Coverage Now or Wait?

Dropping employer health insurance for Medicare makes financial sense when your employee premium contribution exceeds what Medicare Part B plus a supplemental plan costs, when your employer has fewer than 20 employees so Medicare already pays primary or when you want to simplify coverage after retirement.

Keeping employer coverage makes more sense when your employer covers 70% or more of the total premium and you're still actively employed at a company with 20 or more employees. Retirees under 65 who haven't yet reached Medicare eligibility deal with a separate set of trade-offs, since their employer plan may end before their Medicare window opens.

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    Employer Premium Share

    Active employees at large employers pay on average 28% of the average cost of health insurance for single coverage, since employers absorb roughly 70% to 80% of the total premium, per AHRQ data. If your employer covers 70% or more of a comprehensive plan, delaying Medicare until you leave work preserves that subsidy. Once you retire, Medicare becomes your primary coverage and the employer subsidy ends.

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    HSA Contribution Eligibility

    Enrolling in any part of Medicare, including Part A, disqualifies you from contributing to a health savings account (HSA). If you're actively contributing to an HSA and want to continue, delaying Medicare enrollment while still covered by a high-deductible employer plan keeps your eligibility intact. Stop contributions at least six months before enrolling in Medicare to avoid tax penalties, since Medicare Part A coverage can be backdated up to six months.

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    Retirement Timeline

    If you plan to retire within the year, staying on employer coverage until your employment ends and then enrolling in Medicare during the 8-month special enrollment period is often the most straightforward path. This avoids paying both a Medicare premium and an employer contribution at the same time. It also preserves any employer-funded life insurance or other benefits tied to your active employment status.

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    Small Employer Coverage After Age 65

    At employers with fewer than 20 employees, Medicare pays primary regardless of whether you keep employer coverage. Dropping the employer plan after age 65 in that situation reduces your cost without reducing your actual coverage, since Medicare was already paying first. Confirm your employer's plan enrollment rules with your HR department before dropping coverage mid-year to avoid any gap in secondary benefits.

How to Drop Employer Health Insurance and Enroll in Medicare

Move from employer coverage to Medicare by following five steps in the right order: confirm your enrollment window, apply for the correct Medicare parts, choose drug coverage, add a supplemental plan if needed and notify your employer. Completing these steps out of sequence can create a coverage gap or trigger a permanent penalty.

  1. 1
    Confirm Your Enrollment Window Before Giving Notice

    Contact the Social Security Administration at ssa.gov or call 1-800-772-1213 to confirm your special enrollment period before you notify your employer. The eight-month clock starts on your last day of active employment or the day your employer coverage ends, whichever comes first. Having this date confirmed in writing protects you if an enrollment dispute arises later.

  2. 2
    Enroll in Medicare Part A and Part B

    Apply for Medicare Part A and Part B through ssa.gov, at your local Social Security office, or by phone. Most people are automatically enrolled in Part A if they receive Social Security benefits. Part B requires a separate application and the Medicare sign-up process follows different timelines depending on whether you already receive Social Security retirement benefits.

  3. 3
    Choose a Part D Plan or Medicare Advantage Plan

    Original Medicare (Parts A and B) doesn't cover most prescription drugs. Enroll in a standalone Part D plan or a Medicare Advantage plan that includes drug coverage within 63 days of your employer coverage ending to avoid the Part D late enrollment penalty. 

    Both options appear on medicare.gov: a licensed broker can help compare drug formularies and monthly costs across carriers.

  4. 4
    Decide Whether to Add a Medicare Supplement Plan

    Original Medicare leaves you responsible for the $1,736 Part A deductible per benefit period and 20% coinsurance on Part B costs with no annual cap, per CMS 2026. A Medicare Supplement plan (Medigap) covers the Part A deductible and Part B coinsurance, the two largest gaps Original Medicare leaves open. Buy Medigap during your six-month open enrollment window, which starts when you're both 65 or older and enrolled in Part B.

    After that window, insurers can use medical underwriting in most states, so compare Medicare Advantage against Medicare Supplement coverage before the window closes.

  5. 5
    Notify Your Employer and Confirm Cancellation

    Submit written notice to your employer's HR or benefits department. Confirm the exact date your employer coverage ends and get written confirmation, since that date is the reference point for your eight-month SEP clock.

    Ask HR whether any dental, vision, or life insurance coverage can continue separately, since dropping the medical plan doesn't automatically cancel those benefits in all plans.

Making the Switch: Bottom Line

You can drop employer health insurance for Medicare once you're eligible. Employer size determines whether Medicare pays primary or secondary while you work. The 2026 Part B premium is $202.90 per month. Act within the eight-month special enrollment period after your coverage ends to avoid a penalty that adds 10% per year, permanently.

Dropping Employer Health Insurance for Medicare: FAQ

These questions cover the most concerns about dropping employer health insurance for Medicare, including enrollment windows, penalties and coverage gaps:

Does dropping employer coverage count as a qualifying life event for Medicare enrollment?

Can I keep dental and vision benefits from my employer after I drop medical coverage?

What happens to my HSA if I enroll in Medicare?

Does my spouse's coverage under my employer plan end when I drop my enrollment?

Can I re-enroll in employer health insurance if I drop it for Medicare?

Does COBRA count as employer coverage for the Medicare Part B SEP?

About Mark Fitzpatrick

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Mark Fitzpatrick, a Licensed Property and Casualty Insurance Producer, is MoneyGeek's resident Personal Finance Expert. He has analyzed the insurance market for over five years, conducting original research for insurance shoppers. His insights have been featured in CNBC, NBC News and Mashable.

Fitzpatrick holds a master’s degree in economics and international relations from Johns Hopkins University and a bachelor’s degree from Boston College. He's also a five-time Jeopardy champion!

He writes about economics and insurance, breaking down complex topics so people know what they're buying.

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