Updated August 2026 with current deadlines and documentation rules.

Open Enrollment is not your only chance at health coverage. When life changes in specific ways, you get a Special Enrollment Period, or SEP: a window to enroll in or change a Marketplace plan outside the normal season. Missing that window usually means waiting until the next Open Enrollment, so the clock matters more than almost anything else here.

Here is how SEPs actually work in South Carolina, and where people lose them.

What opens a Special Enrollment Period?

A qualifying life event. The common ones:

  • Losing other coverage. Job loss, a cut in hours, aging off a parent’s plan at 26, or the end of Medicaid eligibility.
  • Household changes. Marriage, divorce, a new baby, adoption, or a death in the household.
  • Moving. A permanent move to a new coverage area, which includes moving into South Carolina from another state.
  • Citizenship or immigration status changes.
  • Leaving incarceration.
  • Income changes that alter your eligibility for help paying for coverage.

How long is the window?

Usually 60 days from the event. That is the number to hold onto.

Loss of coverage works a little differently and a little better: the window generally runs from 60 days before the loss through 60 days after. If you know your job coverage ends October 31, you can line up a replacement in September rather than scrambling in November with a gap in between. Almost nobody uses the early half of that window, and it is the half that prevents a lapse.

The three ways people lose an SEP they qualified for

Waiting past 60 days. The window is firm. A qualifying event you report on day 70 is a qualifying event you no longer get to use.

Assuming a voluntary change counts. Losing coverage has to be involuntary. Quitting a plan you could have kept, or losing it for nonpayment, generally does not open a window. Getting laid off does.

Misreading COBRA. Losing job coverage opens a window whether or not COBRA is offered to you. But once you elect COBRA, you generally have to exhaust it or wait for Open Enrollment. Running out of COBRA is a qualifying event; deciding partway through that it is too expensive usually is not. Decide before you elect, not after.

What you will need to prove it

Plan on documentation. The Marketplace commonly asks for a termination letter or a loss-of-coverage notice, a marriage certificate, a birth certificate, or proof of a new address. Coverage can be conditionally approved while verification is pending, and it can be pulled if the documents never arrive.

Pull the paperwork together before you apply. It is the difference between coverage that starts on time and coverage that stalls.

What it will cost

You may qualify for a premium tax credit through the Marketplace during an SEP the same as during Open Enrollment. Whether you do depends on your household size, your income, and whether you are offered coverage elsewhere, so it is not something anyone can promise you over the phone before looking.

One thing worth knowing before you estimate: for 2026 and 2027 coverage, the 400 percent of federal poverty level line is a hard cutoff again, and the caps on repaying excess credit are gone. If a job change is what opened your SEP, your income for the year is probably changing too, which makes the estimate worth a real conversation. Our guide to how the credits and repayment rules interact at tax time covers that in detail.

If you do not qualify right now

Then your next chance is Open Enrollment, which for 2027 coverage runs November 1 through December 15, 2026, with coverage starting January 1. Our Open Enrollment guide walks through what to compare.

If you are turning 65 or already on Medicare, none of the above applies to you. Medicare runs on its own calendar, and when to enroll in Medicare covers those windows.

Frequently asked questions

How long do I have to use a Special Enrollment Period? Usually 60 days from the qualifying event. For a loss of coverage you generally get a window that runs from 60 days before the loss to 60 days after, which is why it pays to call as soon as you know coverage is ending rather than after it does.

Does quitting my job or dropping my plan count? Losing job coverage counts. Voluntarily dropping a plan you could have kept generally does not, and neither does losing coverage because you stopped paying the premium. The distinction is whether the loss was involuntary.

Does COBRA affect my Special Enrollment Period? Yes, and this trips people up. Losing job coverage opens a window whether or not COBRA is offered, but once you elect COBRA you generally have to exhaust it or wait for Open Enrollment. Running out of COBRA is itself a qualifying event; choosing to drop it early usually is not.

Will I need to prove the life event? Expect to. The Marketplace commonly asks for documentation such as a termination letter, a loss-of-coverage notice, a marriage certificate, or proof of a new address. Gathering it up front keeps your coverage from stalling while the paperwork catches up.

Think something in your life just opened a window? Call or text 803-848-0089, or start on our health insurance page. Tell us what changed and when, and we will tell you straight whether you have an option right now or what the next window is.