Accounts and taxes

COBRA vs. the Marketplace After Losing Your Job

Two 60-day clocks start when job coverage ends. How COBRA and marketplace coverage each work, and the arithmetic to run before you pick.

Current as of August 31, 2026 Accounts and taxes

When job-based coverage ends, two separate 60-day clocks start. One is your COBRA election window. The other is your marketplace special enrollment period. They run at the same time, they end on different dates, and missing both usually means waiting for the next open enrollment. This guide explains how each option works mechanically and gives you the arithmetic to run. It does not tell you which to pick, because the answer depends entirely on your numbers.

What COBRA actually is

COBRA is not a different insurance product. It is your exact employer plan, continued, with you paying the whole bill.

Same plan, same network, same deductible. Nothing about the coverage changes except who pays for it.
You pay up to 102% of the full premium. That is the employer share plus your old share plus a 2% administrative fee. If your employer was paying $650 a month and you were paying $150, the full cost is $800 and your COBRA premium can be up to $816.
It typically lasts 18 months after a job loss or reduction in hours. Certain other qualifying events allow up to 36 months.
You get at least 60 days to elect, counted from the later of the date you lose coverage or the date your election notice is provided.
After you elect, you get at least 45 days to make the first payment. The plan cannot demand payment at the moment of election.

The sticker shock is the point to understand. Most people have never seen the full premium because the employer share was invisible. Check your last pay stub or ask HR for the total cost before you assume anything.

The retroactive quirk

COBRA coverage, once elected and paid for, runs backward to the day your old coverage ended. There is no gap.

This has a practical consequence: the 60-day election window works like a look-back period. You can wait, uninsured on paper, and see what happens. If nothing happens, you let the window close. If something expensive happens on day 40, you can still elect COBRA and the claim is covered, because coverage is retroactive to day one.

The catch is symmetrical: premiums are retroactive too. Electing on day 40 means paying for all the weeks you were waiting. This is a real feature of how COBRA works, not a loophole, but it only helps if you keep careful track of the deadline and can produce a large premium payment on short notice.

What the marketplace offers

Losing job-based coverage triggers a special enrollment period on HealthCare.gov or your state marketplace. You have 60 days from the loss of coverage to enroll, and you can also apply before your coverage ends so the new plan starts without a gap.

Two things matter here:

Premium tax credits. Marketplace premiums can be reduced by a tax credit based on your estimated household income for the year. If you just lost a job, your income estimate may be much lower than last year’s W-2 suggests, which can change the math substantially. The credit is advanced monthly based on your estimate and reconciled on your tax return, so estimate honestly.
A COBRA offer you decline does not block the credit. Being eligible for COBRA and enrolling in COBRA are different things. If you never enroll, you can take a marketplace plan with a premium tax credit if your income otherwise qualifies.

The trap: dropping COBRA mid-stream

If you elect COBRA and later decide to quit it voluntarily, that decision does not trigger a new special enrollment period. You generally wait until the next marketplace open enrollment, or until your COBRA runs out on its own, whichever comes first. COBRA expiring at the end of its 18 or 36 months does trigger a special enrollment period. Quitting early because the premium hurts does not.

So the decision is stickier than it looks. Electing COBRA in September and hoping to switch to a cheaper marketplace plan in October does not work. Electing in September and switching during open enrollment for a January 1 start does.

Deductible progress: carries on COBRA, resets on a new plan

Because COBRA is the same plan, everything you have already paid toward your deductible and out-of-pocket maximum stays credited. A new marketplace plan starts you at zero, whatever the calendar says.

This is often the deciding variable late in the year. Losing coverage in October with a met deductible is a very different problem from losing coverage in February with nothing met.

The arithmetic to run

Work the numbers for the rest of the calendar year, then for a full year if your situation will last that long. Here is the structure, with example figures.

Suppose you lose coverage August 31. Your COBRA premium is $816 a month. You have met $1,800 of a $2,000 deductible, and you expect roughly $2,500 in billed care before January.

	COBRA	Marketplace plan
Monthly premium	$816	$520 sticker, $230 after estimated credit
Premiums, Sep-Dec	$3,264	$920
Deductible status	$200 left	$3,500, starts at zero
Expected cost sharing, Sep-Dec	$200 + coinsurance on the rest	Most of the $2,500 out of pocket
Worst case, Sep-Dec	Premiums + remaining out-of-pocket max	Premiums + full new out-of-pocket max

Fill in your own plan’s numbers and let the totals speak. Run the expected case and the worst case for each option - the worst case is premiums plus the out-of-pocket maximum, and our out-of-pocket calculator does that math for you. In this example, COBRA’s premium disadvantage shrinks because the deductible is nearly met. In February, with nothing met, the same comparison often points the other way. Neither result is a recommendation. It is arithmetic.

Two non-price checks before you decide:

Network. The marketplace plan’s network is not your old plan’s network. Confirm your current doctors and hospital are in-network under any plan you are pricing.
Drugs. Check each plan’s formulary for anything you fill regularly, at the tier it actually sits on.

Deadlines, in one place

Clock	Length	Starts
COBRA election	At least 60 days	Later of coverage loss or election notice
First COBRA payment	At least 45 days	Date you elect
Marketplace special enrollment	60 days	Date coverage is lost (you can also apply before)

Write the actual dates down the day you get your election notice. If both windows close with nothing elected, you are generally waiting for open enrollment unless another qualifying event occurs. Terms you do not recognize in your notice are in the glossary.

Sources

Figures and rules on this page are current as of August 31, 2026. Dollar limits and deadlines change - check the linked source before you rely on a number.

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