If you elect COBRA after a layoff and later decide it costs too much, you cannot simply stop paying and buy a Marketplace plan instead. HealthCare.gov is explicit: “Voluntarily dropping COBRA doesn’t count. Choosing to stop paying COBRA premiums on your own doesn’t qualify” for a Special Enrollment Period (HealthCare.gov).
You will likely encounter the COBRA choice as a price comparison. It is really a question about a date.
Not advice: This is educational information drawn from HealthCare.gov, U.S. Department of Labor and IRS guidance. It is not tax, legal, financial or insurance advice, and it does not recommend any health plan. Consult a qualified professional about your own situation.
Why the quote you get in September is the worst one you will see
Marketplace subsidies are not priced off your employment status or your last paycheck. They are priced off a projection: “Marketplace savings are based on your expected household income for the year you want coverage, not last year’s income” (HealthCare.gov).
Read that against a calendar. Someone laid off in September has already earned most of a full year’s salary. The expected 2026 household income they must enter is high, because it mostly already happened. The subsidy calculated against it is correspondingly small.
The same person, entering an honest estimate for 2027 in November, is describing a very different year.
Nothing about their situation changed except which year the form is asking about. That is the whole asymmetry, and it is why the COBRA election form and the Marketplace quote should not be compared on the same afternoon as though they were two prices for the same thing.
The door that only opens one way
Losing job-based coverage opens a 60-day Special Enrollment Period. You can spend it on COBRA or on a Marketplace plan. The trap is what happens if you spend it on COBRA and change your mind in month three.
You cannot undo it by stopping payment. Voluntary termination does not qualify you for anything.
Two events do reopen the Marketplace, and it is worth knowing exactly what they are.
The first is running COBRA out to its end. “When your COBRA coverage ends, you have 60 days to enroll in a Marketplace health plan through a Special Enrollment Period” (HealthCare.gov). After a termination or a cut in hours, COBRA runs for 18 months (U.S. Department of Labor). That is a long time to wait for a door.
The second is Open Enrollment, and it is the one that actually matters here. Between November 1 and January 15 you may switch “regardless of why you’re ending COBRA coverage” (HealthCare.gov). No qualifying event, no explanation. If you want the new plan to start on January 1 rather than February 1, the enrolment has to be done by December 15 (HealthCare.gov).
So the real question is how many months you are bridging
Once you see Open Enrollment as the exit, the September decision stops being “COBRA or Marketplace” and becomes something you can actually price.
A layoff in early September puts roughly four months between you and January 1 coverage. That is four months of COBRA at up to 102% of the plan’s full cost (U.S. Department of Labor). That is the entire premium your employer used to mostly absorb, plus an administrative charge. Set it against four months of a Marketplace plan priced off a 2026 income you have already earned.
Sometimes COBRA wins that four-month race. If you are mid-treatment, or you have already met a large deductible this year, or the specialist you need sits only in the employer network, the bridge is worth buying. Those cases are real. The layoff decision guide covers them alongside the severance and unemployment clocks that start the same day.
What changes is that you are now buying a bridge to a known date, not signing up for eighteen months by default. Price four months, not four years.
The number you enter in November is the one that matters
The 2027 credit schedule is where this gets expensive or cheap, and it is not gradual. The applicable percentage table for 2027 stops at 400 percent of the federal poverty line, and a dollar past that line does not shrink the credit. It removes it. That threshold, and the levers that move a household back under it, are the subject of the 2027 premium tax credit piece.
Two housekeeping points follow from estimating a year in advance.
Update the application when the estimate stops being true. HealthCare.gov asks you to “update your Marketplace application as soon as possible” when income or household members change during the year (HealthCare.gov). A person who finds work in March has a different 2027 than the one they described in November.
And the estimate is settled later, not accepted permanently. Advance credit payments are trued up against your actual income at tax time: “You claim the premium tax credit and reconcile the credit with the amount of your advance credit payments for the year on Form 8962” (IRS). Guessing low on income is not free money; it is a bill in April.
The one date to write down
November 1. Not because you should wait for it, but because it is the date that turns a permanent-feeling decision into a temporary one.
Working backwards from it:
- Before you sign the COBRA election form, count the months between today and January 1. That is the bridge you are actually pricing.
- Get the Marketplace quote anyway, even if the 2026 subsidy looks poor. You need to know what you are declining and for how long.
- Do not stop paying COBRA to force a switch. It does not open the Marketplace and it can leave you uninsured.
- Put November 1 and December 15 in your calendar the day you are laid off. The first is when the door opens; the second is the last day to be covered on January 1.
The severance side of the same 60 days runs on its own clock. The severance runway calculator shows how many months the payout actually funds once tax is out of it, which is the other half of deciding what you can afford to bridge with.
COBRA is not a trap because it is expensive. It is a trap because it is the option that arrives in the post, pre-filled, while the cheaper one requires you to know the calendar.
