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Involuntary loss of coverage is a qualifying event that triggers a special enrollment period. If you lose your plan, you’ll have a chance to enroll in a new plan, either on or off the exchange in your state.

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What are the deadlines for the ACA’s open enrollment period?

The annual open enrollment for ACA-compliant health insurance runs from November 1 to January 15 in most states.

What is the deadline to enroll in 2024 ACA-compliant health insurance coverage in the individual market?

Open enrollment for 2024 health coverage begins in nearly every state on November 1, 2023. (Some exceptions: It starts on October 15 in Idaho, and in recent years New York has delayed the start until November 16. In previous years, California residents have been able to renew their existing coverage starting on October 1, although new enrollments and plan change opportunities don’t begin until November 1 in California.) In most states, open enrollment for 2024 coverage will end on January 15, 2024, but there are some exceptions, described below.

And in most states, December 15 is the deadline to get a plan that takes effect January 1; enrollments completed in the latter half of December and the first half of January will generally take effect February 1 instead. But there are some exceptions to this:

Open enrollment used to end on December 15 in most states, but the Biden administration added a one-month extension that took effect for the 2022 plan year and will continue to be used from now on (December 15 is still the deadline to get a January 1 effective date). This applies to the 32 states that use for 2024. The other 18 states and DC are free to follow that same schedule — most do — or set their own schedule.

What are the Obamacare open enrollment deadlines for state-run exchanges?

The states that run their own exchanges can set their own enrollment deadline, as long as it’s not earlier than December 15. For 2024 coverage, 19 fully state-run exchanges have the option to set their own open enrollment schedules. This includes Virginia, which is debuting a new state-run exchange platform in the fall of 2024.

Most of these state-run exchanges choose to follow the same November 1 – January 15 schedule that uses. But some opted for different schedules. Here are the open enrollment windows that the state-run exchanges are using for 2024 coverage. (Dates that vary from the schedule are shown in bold font, in some cases, deadlines are from prior year data until updated information is available):

Who can enroll in ACA-compliant health plans year-round?

Year-round enrollment is available for some populations and for some types of health coverage. This includes:

And CMS has finalized a new rule that allows subsidy-eligible applicants with income up to 150% of the poverty level to enroll year-round, as long as the American Rescue Plan’s subsidy enhancements remain in effect. The Inflation Reduction Act has extended the subsidy enhancement through 2025, so the low-income special enrollment period will also continue through 2025. This special enrollment period is optional for state-run exchanges, although most of them offer it and some of them extend it to higher income levels due to the availability of additional state-funded subsidies that result in premium-free benchmark plans even at incomes above 150% of the poverty level.

Does Obamacare open enrollment continue through January 15 in all states?

HHS had previously defined open enrollment as the window from November 1 to December 15, but state-run exchanges had the option to offer special enrollment periods before or after that window, in order to effectively extend open enrollment.

For coverage effective in 2022 and future years, HHS has changed the enrollment window for It’s now November 1 through January 15. But instead of requiring state-run exchanges to use an enrollment window at least that long, HHS has given them the option of keeping an earlier deadline, as long as it’s not before December 15. This is why Idaho is allowed to continue to have a mid-December enrollment deadline. But all of the rest of the state-run exchanges have opted to extend their enrollment deadlines to January 15 or later.

Fully state-run exchanges are the only ones with the ability to extend open enrollment on their own (in the other states, the decision has to come from CMS, since the extension has to be issued via Most of them had chosen to offer enrollment windows that extended past December 15 in the years when that was the end of the enrollment window on But now that HHS has extended the deadline to January 15, many of the state-run exchanges are using that date rather than issuing additional extensions.

Outside of ACA’s open enrollment window, enrollment is only available with a qualifying event

After open enrollment ends, people can normally only purchase coverage if they have a special enrollment period triggered by a qualifying event such as:

Regardless of whether you purchase insurance through the exchange or off-exchange, the annual open enrollment window applies, and special enrollment periods are necessary in order to enroll at any other time of the year.

Open enrollment schedule has varied over time

Although open enrollment is now set at November 1 – January 15 in most states, it has varied quite a bit over the years. In the federally-run marketplaces, the following enrollment windows have been used (with some last-minute extensions, and with somewhat different schedules used by the state-run marketplaces):

  • 2014 coverage: October 1, 2013 through March 31, 2014
  • 2015 coverage: November 15, 2014 through February 15, 2015
  • 2016 coverage: November 1, 2015 through January 31, 2016
  • 2017 coverage: November 1, 2016 through January 31, 2017
  • 2018 coverage: November 1, 2017 through December 15, 2017
  • 2019 coverage: November 1, 2018 through December 15, 2018
  • 2020 coverage: November 1, 2019 through December 15, 2019
  • 2021 coverage: November 1, 2020 through December 15, 2020
  • 2022 coverage: November 1, 2021 through January 15, 2022
  • 2023 coverage: November 1, 2022 through January 15, 2023
  • 2024 coverage: November 1, 2023 through January 15, 2024

Louise Norris is an individual health insurance broker who has been writing about health insurance and health reform since 2006. She has written dozens of opinions and educational pieces about the Affordable Care Act for Her state health insurance marketplace updates are regularly cited by media who cover health reform and by other health insurance experts.

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