You left a job, or lost one
Two doors are open and they close at different speeds. The expensive mistake is taking the one that arrives in the mail without pricing the other.
When employer coverage ends you have two realistic options, and the one that contacts you is the more expensive one. COBRA arrives as a formal notice in the mail. The marketplace does not write to anybody.
What COBRA actually costs
COBRA continues the exact plan you had — same network, same doctors, same deductible progress. What changes is who pays. Your employer was covering most of the premium; now you pay all of it, plus an administrative fee of up to 2%.
The number surprises people because the employer share was never itemized on a pay stub. A plan that cost you a modest amount per month can become several times that overnight, for identical coverage.
Why the marketplace is often cheaper
Losing job-based coverage is a qualifying life event, so it opens a 60-day Special Enrollment Period. And because your income for the rest of the year is probably lower than it was, you may qualify for a premium tax credit you would not have qualified for while employed.
That credit cannot be applied to COBRA. It is available only on a marketplace plan, which is what usually decides the comparison.
Two clocks, and they are not the same clock
COBRA: 60 days from the election notice to elect.
Marketplace: 60 days either side of the coverage
ending.
They start on different dates and they run at the same time.
The marketplace window is the one that closes without warning. Miss it and you generally wait for Open Enrollment — and if you have elected COBRA by then, dropping it voluntarily is not a qualifying event. You would be committed to the expensive option until it runs out on its own.
The retroactive window almost nobody mentions
COBRA election is retroactive. You have 60 days to elect, and if you do, coverage is backdated to the day the old plan ended — with premiums owed for that whole period.
Which means: if you have no expensive medical need during those 60 days, you can decline to pay, shop the marketplace, and still elect COBRA retroactively if something serious happens inside the window. It is an unpaid option on your old plan, and it is one of the few genuinely free things in this system.
This works only inside the election window and only if premiums are brought current. Do not rely on it without confirming your specific dates.
When COBRA is the better answer
It sometimes is, and the reasons are specific:
- You are mid-treatment with doctors who are not in any marketplace network available in your county.
- You have already met a large deductible this year. Starting a new plan resets it to zero.
- Your income for the year will still be high enough that no credit is available — see the cliff.
- The gap is a few weeks and the paperwork is not worth it.
If you are weighing COBRA specifically, our sister site CobraScout covers the election rules, deadlines and costs in detail.
What to do this week
- Find the date your coverage ended or ends. Everything counts from there.
- Read the COBRA notice for the real monthly premium.
- Estimate your income for the rest of the year — probably lower than you think, which probably means a larger credit.
- Price the marketplace plans in your county against that COBRA figure.