Health Insurance Before Medicare: How to Bridge the Gap

If you leave your job or retire before 65, you can bridge the gap to Medicare with COBRA, a plan from the ACA Marketplace, a spouse’s employer plan, retiree coverage from a former employer, or Medicaid if your income qualifies. The right pick depends on how many months you have until Medicare, your income, and whether your doctors are in the plan’s network. The one deadline to remember: you generally have 60 days before and 60 days after losing job-based coverage to enroll in a Marketplace plan.

This guide walks through each option, how to compare them, and how to hand off cleanly to Medicare so you avoid both a lapse in coverage and late penalties. We are an independent Colorado brokerage, so we also cover what is different if you live here.

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TL;DR

• Most people retiring before 65 choose between COBRA, a Marketplace plan, a spouse’s plan, or Medicaid. Which one wins depends on cost, time until Medicare and your doctors.
• Marketplace enrollment after losing job coverage runs from 60 days before through 60 days after your separation date.
• COBRA usually costs the full premium plus a 2% fee, but it can make sense when Medicare is less than 18 months away.
• Do not cancel your bridge plan until you know your Medicare start date, and sign up during your Initial Enrollment Period to avoid penalties.
• A licensed independent broker can compare plans across carriers at no cost to you.

Table of Contents

• Why there is a gap at all
• Your main options before Medicare
• How to compare the options
• Deadlines that protect you from a gap
• Colorado: what to know if you live here
• What about Medigap? A note on the other “gap”
• A simple timeline to follow
• Our perspective
• Getting help with your plan
• FAQ
• Sources

Why there is a gap at all

Medicare generally starts at 65. Social Security retirement benefits can be claimed as early as 62, and many people stop working even sooner. That leaves years in which your employer plan ends and Medicare has not begun. Fidelity’s retirement guidance notes that Medicare begins at 65 rather than when you first claim Social Security, with exceptions such as certain disabilities or medical conditions.

The gap matters because health costs tend to rise with age, and going without coverage for even a few months can mean a single hospital stay that wipes out savings. The good news is that losing job-based coverage opens a window to buy new coverage, and several routes exist.

Your main options before Medicare

COBRA continuation coverage

COBRA lets you keep your employer’s group plan after leaving the job. The trade-off is price. AARP explains that you generally pay the whole premium, including the share your employer used to cover, plus a 2% administrative charge. The same source says COBRA lasts 18 months after leaving a job, and a spouse may sometimes continue the plan for 36 months if the worker goes on Medicare.

Federal COBRA generally applies to employers with 20 or more employees, while state continuation laws may cover people at smaller employers, per AARP. Duration and fees under those state rules differ.

COBRA tends to fit best when:

• You are within about 18 months of Medicare.
• You have already met much of your deductible and out-of-pocket maximum for the year.
• Keeping your current doctors and hospital is a priority.

If COBRA runs out before you turn 65, you will need another plan for the remaining months, so count the months before you decide. Our article on how COBRA interacts with Medicare covers an important trap once you reach 65.

ACA Marketplace plans

HealthCare.gov says people who retire before 65 and lose job-based coverage can buy a Marketplace plan, and depending on household income and size may qualify for premium tax credits, lower out-of-pocket costs, or Medicaid. Marketplace plans must cover preexisting conditions and specified preventive services, including many vaccines, without out-of-pocket costs, according to AARP.

Because tax credits depend on your expected income, early retirees who draw down savings carefully can sometimes land at a level where help is meaningful. Plans bought directly from an insurer outside the Marketplace cannot use those credits, which is why the choice between on and off exchange deserves a closer look. We break it down in on-exchange versus off-exchange coverage.

One timing point: CMS states that Marketplace financial help ends once you become eligible for premium-free Part A, beginning 4 months after eligibility even if you have not enrolled. Plan for that when you near 65.

A spouse or partner’s plan

If your spouse or domestic partner is still working and has employer coverage, joining that plan is often the simplest route. Losing your own coverage is typically a qualifying life event for adding yourself. Compare the premium for adding a dependent, the deductible, and whether your doctors are in network against the other options.

Retiree coverage from a former employer

Some employers offer retiree health benefits. AARP notes that availability depends on the employer. Ask HR before your last day what is offered, what it costs, and what happens when you become eligible for Medicare, since many retiree plans coordinate with Medicare at 65.

Medicaid

If your income drops sharply in retirement, you may qualify for Medicaid. HealthCare.gov says Marketplace applicants can find out whether they qualify for a private plan with savings or for Medicaid in their state. Rules vary by state, so check your own state’s program.

How to compare the options

Verywell Health suggests weighing time until Medicare, premium and subsidy eligibility, out-of-pocket spending so far, and whether you can keep your providers. Here is a practical way to use those factors.

Factor COBRA Marketplace Spouse’s plan Medicaid Typical cost Full premium plus 2% Depends on income and credits Depends on employer’s dependent rates Based on income eligibility Keeps your current network Yes, same plan Depends on plan Depends on plan Depends on state program Length Usually 18 months Renewed yearly While spouse is covered While eligible Best when Medicare is near Medicare is years away Spouse has good coverage Income is low

A few questions to answer before choosing:

1. How many months until Medicare? Short runway favors COBRA. Long runway favors shopping the Marketplace.
2. What is your expected income this year? Premium tax credits are tied to it, so a one-time payout or a big retirement withdrawal can change your result.
3. Which doctors and prescriptions matter most? Check each plan’s network and drug list before you commit.
4. How much have you already paid toward this year’s deductible? COBRA carries that progress forward, while a new plan usually starts you over.

Deadlines that protect you from a gap

The deadlines are short, so put them on your calendar before your last day of work.

• Marketplace special enrollment: For lost job-based coverage, HealthCare.gov says the window runs from 60 days before through 60 days after the separation date.
• COBRA election: Your plan administrator sends an election notice after you leave. Read it right away for the exact election and payment deadlines.
• Medicare’s Initial Enrollment Period: Medicare.gov states that most people first qualify at 65, and the period begins 3 months before the month of your 65th birthday and ends 3 months after it.

Medicare.gov also warns that failing to enroll when first eligible can cause a coverage gap and Part B late-enrollment penalties that may last as long as you have Part B. Our guides on late enrollment penalties and Part B enrollment explain how that works in practice.

The CMS Medicare-and-Marketplace guide adds a safeguard: if you have Marketplace coverage, enroll in Medicare during your Initial Enrollment Period and do not end the Marketplace plan until you know your Medicare start date.

Colorado: what to know if you live here

Colorado residents shop for individual plans through the state’s own marketplace, Connect for Health Colorado. Its page on buying outside open enrollment lists losing job-based coverage, losing Medicaid, or a move among the life events that can qualify you for a special enrollment period. Our own overview of which life events qualify for ACA special enrollment goes through the common ones.

Some practical Colorado points we see in conversations with local clients:

• Provider networks can differ a lot between the Denver metro area and mountain or rural counties, so check your specialists and hospital before you pick a plan.
• Small employers may fall under state continuation rules rather than federal COBRA, so ask your former employer which applies.
• If you plan to keep working part-time, your situation may differ again. See our guide on Medicare and working past 65.

And if you turn 65 here, our article on Medicare initial enrollment in Colorado lays out the seven-month window.

What about Medigap? A note on the other “gap”

Some people searching for gap coverage mean Medigap, also called Medicare Supplement. That is coverage you add after you enroll in Medicare to help pay costs Original Medicare leaves behind, such as deductibles and coinsurance. It is a different product from the bridge coverage above, and it starts to matter once you reach 65. Your Medigap open enrollment window is tied to your Part B start date, which we cover in confirming your Part B date. Our page on Medigap plans in Castle Pines and the comparison of Medicare Advantage versus Medigap are good next stops.

A simple timeline to follow

1. 6 to 12 months before you leave work: Ask HR about retiree coverage and COBRA costs. Estimate your income for the year you stop working.
2. 60 days before your last day: The Marketplace window opens. Get quotes so you can compare them with COBRA.
3. Your last day: Confirm the exact date your employer coverage ends.
4. Within 60 days after: Finish enrollment in your chosen plan. Do not let the window close.
5. 3 months before your 65th birthday month: Medicare enrollment opens. Pick Original Medicare with a supplement and drug plan, or a Medicare Advantage plan.
6. Before canceling your bridge plan: Confirm your Medicare start date in writing.

Our perspective

We talk with people every week who assume the hardest part of retiring early is the money. Often the harder part is the paperwork: three deadlines, three sets of rules, and no one telling you which one comes first.

Our view is that the bridge plan and the Medicare plan should be chosen as one decision, not two. The doctors you keep at 62 are often the doctors you want at 65, so it helps to pick a network that carries you forward. Because we are independent and work across multiple carriers, we can compare options side by side instead of steering you toward one company’s plan.

We also stay with you after you enroll. That means help with claims, yearly plan reviews, and a second look every fall, since plans and your health change. Pre-Medicare coverage is rarely set and forget.

Zach

Getting help with your plan

We are a licensed, independent brokerage serving Castle Pines and the rest of Colorado. We can compare individual health plans for your bridge years, then plan your move to Medicare, including Medicare Advantage, Medigap and Part D. Our service to you has no direct cost, since carriers compensate us when you enroll.

Start with our page on individual health insurance in Castle Pines, or see everything we offer on our services page. If you are within a year or two of 65, our Medicare planning team can map your timeline.

FAQ

How do I get health insurance after retirement but before Medicare?

Apply for a Marketplace plan during the special enrollment period after you lose job-based coverage. HealthCare.gov says you can apply from 60 days before through 60 days after your separation date. You can also elect COBRA, join a spouse’s plan, or apply for Medicaid if you qualify.

Is COBRA or the Marketplace cheaper before Medicare?

It depends on your income and the plan. COBRA generally costs the full premium plus a 2% charge, while Marketplace plans may come with premium tax credits based on your income. Get a quote for both and compare the premium, deductible and network.

Can I be denied coverage for a health condition?

Not on the Marketplace. AARP states that ACA Marketplace plans must cover preexisting conditions. This makes the Marketplace a dependable choice if you have ongoing health needs.

What happens if I do not sign up for Medicare at 65?

Medicare.gov warns that missing your first enrollment window can cause a coverage gap and Part B late-enrollment penalties that may last as long as you have Part B. If you have other coverage, check whether it counts before you delay.

Does Marketplace help continue after I turn 65?

No. CMS says financial help ends when you become eligible for premium-free Part A, starting 4 months after eligibility, even if you have not enrolled. Plan your Medicare enrollment before then.

Sources

• Health Care Coverage for Retirees, HealthCare.gov
• Early Retirement Health Insurance, AARP
• Bridging the health care coverage gap, Fidelity
• Health Insurance Options If You Retire Before Age 65, Verywell Health
• Medicare & the Health Insurance Marketplace, CMS
• When can I sign up for Medicare?, Medicare.gov
• When Can I Buy Insurance?, Connect for Health Colorado

Recommended

• What Medicare Doesn’t Cover
• Avoid Recovery Letters: Medicare Coordination for U.S. Seniors, CO Help
• Medicare Prior Authorization: What It Is and How to Get It
• HSA and Medicare: Rules, Penalties and Smart Moves at 65