Is COBRA Retroactive?

Yes. If you elect COBRA within your 60-day election window, coverage goes back to the day your old plan ended, so there is no gap. The catch: every month back to that date is part of your premium, and the back premium comes due at once.

Reviewed by Prodest Insurance Group, a licensed insurance agency (NPN 19515569) · Updated 23 September 2026 against current federal guidance.

Prefer to talk? Call (888) 918-4516 · Monday to Friday, 10:00 a.m. to 5:30 p.m. Eastern

How the Timing Works

DeadlineHow longWhat it means
Elect COBRA60 days from the later of your coverage ending or receiving your election noticeCoverage reaches back to the day your old plan ended
First payment45 days after you electThe payment covers the months back to that date. If it is not made within 45 days, the plan can end your COBRA
Length of coverage18 months for job loss or reduced hours; up to 36 months for dependents after other eventsThe clock starts when your old plan ended, so the time you spend deciding still counts
Coverage may not be active until the first premium is paid. If that payment is not made within the 45 days, the plan can terminate your COBRA coverage, so the payment deadline matters as much as the election deadline.

What Retroactive Coverage Costs

Under COBRA you pay up to 102 percent of the full premium: the whole cost of the plan plus a 2 percent administrative fee. Retroactive coverage is not free coverage. The months between your old plan ending and your election are billed like any other month.
Your exact cost is listed on the COBRA election notice your plan administrator sends you. See what COBRA typically costs →

If You Need Care Before You Elect

You can still elect COBRA after getting care, as long as you are within your 60 days. Until you elect and make the first payment, though, your coverage may show as inactive. A plan may hold claims, or cancel coverage and then reinstate it back to the day your old plan ended once your payment arrives.
If you need care during this period, ask your plan administrator how it handles claims until you elect and pay.

Waiting to Elect Is Allowed, but It’s a Risk

Some people wait, stay uninsured, and elect only if something happens. That is allowed, but it carries risk, because the full back premium comes due at once. Waiting also does not get you more COBRA. Coverage is retroactive to the day your old plan ended, so the months you spend deciding count against your 18 months.
There is a second timing trap. Losing job-based coverage opens a 60-day Special Enrollment Period on the ACA Marketplace. If you elect COBRA and later drop it because it costs too much, dropping it does not reopen that window. You would generally have to wait for Open Enrollment. Compare your options before you elect, not after.

What to Do Before Your Window Closes

  1. Find two dates: the day your old plan ended and the day your election notice arrived. Your 60 days run from whichever is later.
  2. Check the premium on your election notice. Remember that you will owe every month back to the day your old plan ended.
  3. Compare Marketplace plans while your 60-day Special Enrollment Period is still open. Depending on your income, premium tax credits may make a Marketplace plan cost less.
  4. Decide before either window closes, so you are not left choosing between a large back premium and no coverage.
  5. Speak with a licensed agent if the deadline is close. There is no cost.
What to do when you lose coverage, step by step →

Not sure how much time you have left?

A licensed agent can check your dates and compare your options in a few minutes, at no cost.
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This page is general information, not advice about your specific situation. Your plan documents and the Marketplace determine what applies to you. A licensed agent can review your circumstances with you.

Common Questions

Yes. If you elect within the 60-day window, coverage goes back to the day your old plan ended, so there is no gap.

To the day your old job-based plan ended.

Yes. The months back to the day your old plan ended are part of your premium, and the back premium comes due at once.

60 days from the later of your coverage ending or receiving your election notice.

45 days after you elect.

The plan can terminate your COBRA coverage. Coverage may not be active until the first premium is paid.

You can still elect within your 60 days. Until you elect and pay, the plan may hold claims or show coverage as inactive, then reinstate it back to the day your old plan ended once payment is made.

No. The coverage period counts from the day your old plan ended, so time spent deciding counts against the total.

Read Next

How long does COBRA last? →
How much COBRA actually costs →
Compare COBRA and Marketplace coverage →
What to do when you lose coverage →
Qualifying life events, in full →

Sources

The information on this page is drawn from the following federal sources. Your own plan documents govern your specific situation.

Check your dates before you decide

A licensed agent can confirm how many days you have left, what the back premium would be, and what a Marketplace plan would cost your household. No charge, no obligation.
Get My Options
This page is general information, not advice about your specific situation. Your plan documents and the Marketplace determine what applies to you. A licensed agent can review your circumstances with you.

Prefer to talk? Call (888) 918-4516 · Monday to Friday, 10:00 a.m. to 5:30 p.m. Eastern

This website provides educational information about health insurance and is a solicitation for insurance. It is a non-government website operated by Prodest Insurance Group, a health insurance agency that presents health plans, which may include Affordable Care Act (ACA) plans, private health insurance, short-term medical insurance, or supplemental insurance based on the consumer's selection. Qualified ACA plans must meet or exceed the essential benefit requirements of the Affordable Care Act; non-ACA plans are not required to provide all of the essential benefit requirements contained in the Affordable Care Act. Pre-existing condition provisions, benefit availability, limitations and exclusions vary by plan type and state. You should review all plan details and product brochures before purchase. To qualify for ACA health insurance coverage outside of the open enrollment period, you must meet special enrollment requirements.

*Eligibility for Affordable Care Act (ACA) Advance Premium Tax Credit (APTC) and cost-sharing reductions is based on annual federal income thresholds, household size, and plan availability within the applicable service area. Premium rates, plan availability, and subsidy amounts vary by state and marketplace. Final eligibility and premium obligations are determined by the Health Insurance Marketplace under Internal Revenue Code Section 36B and applicable federal regulations.

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