What Should You Do if You Miss Open Enrollment for Health Care?

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What happens if you miss open enrollment varies by state, with some state governments imposing penalties for individuals who fail to maintain coverage. That said, there may be ways to obtain health insurance outside of open enrollment, such as qualifying for a special enrollment period, shopping for short-term coverage, joining someone else’s plan or enrolling in a public health care program.

Read below to learn the most important open enrollment dates you should commit to memory and what options you may have if you missed open enrollment at work.

Key Takeaways

  • Generally, you must purchase health insurance during open enrollment, which lasts from Nov. 1 to Jan. 15 on the Health Insurance Marketplace and may have slightly different dates if you have employer-sponsored coverage.
  • Some states fine residents who do not maintain health insurance.
  • All Marketplace plans and some employer-paid private health insurance plans automatically renew themselves, so you may not have to worry about losing coverage due to missing the open enrollment deadline if you’re already insured.
  • You can sign up for coverage at any point during the year if you qualify for a special enrollment period due to a major life event or become eligible for Medicaid or CHIP.
  • Supplemental and short-term health insurance plans may also have year-round enrollment opportunities, but they typically don’t meet the ACA’s minimum essential coverage requirements.

When Is Open Enrollment?

Open enrollment is a limited window of time when you can sign up for a new health plan or change your existing coverage. It runs from Nov. 1 to Jan. 15 on the federal Health Insurance Marketplace — your coverage will take effect at the beginning of the new year if you enroll by Dec. 15, while it will start on Feb. 1 if you enroll afterward.[1] Some states operate their own health insurance exchanges and may have slightly different open enrollment dates as a result.

When is open enrollment

If you receive health insurance coverage through your employer, your open enrollment period won’t necessarily correspond with the Marketplace’s annual open enrollment period — though many employers do also set open enrollment for some time in the fall.[2] Be sure to contact your company’s human resources (HR) department for clarification on when you can sign up for a work-based health plan.

Keep in mind that job-based coverage may have a shorter open enrollment period than the Marketplace, as most employers opt to keep enrollment open for only two to four weeks.[2]

There are also open enrollment deadlines you need to be aware of if you are eligible for government-sponsored coverage through Medicare. For example, open enrollment for Original Medicare lasts from Oct. 15 to Dec. 7 each year. Meanwhile, Medicare Advantage open enrollment occurs annually from Jan. 1 to March 31.[3]

What Happens if You Miss Open Enrollment?

There isn’t explicitly a penalty for missing open enrollment, but some states will issue a fine if you fail to maintain health insurance that complies with the requirements of the Affordable Care Act (ACA). See the table below for information about the states that impose penalties for not having health insurance.

State/District

Penalty

California[4]

$900 per adult and $450 per child, or 2.5% of the amount of your gross income that exceeds your filing threshold requirements based on your tax filing status and number of dependents, whichever is higher

District of Columbia[5]

$695 per adult and $347.50 per child, or 2.5% of your household income, whichever is higher

Massachusetts[6]

$25 to $187 per month, depending on your household income relative to the federal poverty level (FPL)

New Jersey[7]

$695 to $21,420, depending on factors like your household income and number of dependents

Rhode Island[8]

$695 per adult and $347.50 per child, or 2.5% of your household income, whichever is higher

That said, missing open enrollment should only be a problem if you need to update your coverage or don’t already have a health plan. If you are currently covered by a Marketplace health insurance plan and don’t take action during open enrollment, then you will simply be automatically reenrolled in the same plan or a similar plan for next year.[9]

How Do You Get Coverage if You Miss Open Enrollment?

You can update your health coverage or buy a new plan at any point during the year if you qualify for a special enrollment period (SEP). SEPs are generally triggered by major life events that significantly alter your health insurance needs. Examples of common qualifying life events include getting married, having a child, moving to a new state or losing coverage due to the death of a family member.

qualifying life events that can make you eligible for a special enrollment period infographic

You may also be able to buy coverage from a private insurance company outside of open enrollment. However, these off-Marketplace plans may not meet the ACA’s minimum essential coverage requirements. In addition, you can’t use income-based tax credits to lower the premiums for an off-Marketplace plan like you can for a Marketplace plan.[10]

What Happens if You Miss Open Enrollment at Work?

Missing open enrollment for your employer-sponsored group health insurance will generally leave you unable to add coverage or adjust your existing plan — and you may even be stuck with your current coverage. Unlike Marketplace plans, which you can cancel at any time, employer-sponsored plans only allow you to drop coverage outside of open enrollment or a special enrollment period if you pay your premiums on a post-tax basis.[11][12]

Job-based health plans may automatically renew like Marketplace plans, but you should check with your HR department to confirm whether you risk losing coverage if you don’t take action during open enrollment.[13] Keep in mind that starting a new job and becoming eligible for employer-provided coverage triggers an SEP.

As a result, missing your work-based health plan’s open enrollment window may only be an issue if you declined to enroll when you first started the job.

How Do You Get Coverage if You Miss Open Enrollment at Work?

Even if you miss open enrollment at work, your employer should offer you an SEP lasting at least 30 days if you experience a qualifying life event.[14] You could also get a Marketplace plan if open enrollment is ongoing or you are eligible for an SEP. However, your employer won’t contribute to the premium payments for a Marketplace plan like it would for your job-based plan, so you could end up paying more for coverage if you go this route.

Alternatively, you could see whether you are eligible for coverage through your spouse’s employer if their open enrollment period is still in progress. Finally, if your employer doesn’t automatically renew your insurance and you lose coverage due to missing open enrollment, you may be able to get back on your parents’ health insurance if you are under the age of 26.[15]

What Options Are Available if You Missed Open Enrollment?

If you have missed open enrollment, you may want to check whether you or your dependents are eligible for either Medicaid or the Children’s Health Insurance Program (CHIP). These government-funded programs provide subsidized health care coverage for low-income families, and eligible individuals can enroll in them year-round.[1]

Another option is purchasing short-term health insurance to tide you over until the next open enrollment period. However, you should be aware that short-term health plans may not provide the same level of coverage as ACA-compliant major medical insurance plans. Additionally, limited-duration health insurance plans are not available at all in some states, such as California and New Jersey.[16][17]

Finally, you may be able to enroll in one or more supplemental health insurance plans at any time. These types of plans cannot adequately replace major medical insurance, but they can at least provide limited coverage for specific situations. Examples of supplemental plans include critical illness insurance and hospital indemnity insurance.

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FAQs

What should you do if you miss open enrollment at work and still want coverage?

If you miss open enrollment at work and still want coverage, you should consider checking whether you’re eligible for a special enrollment period, applying for Medicaid or CHIP, shopping for a Marketplace or other private health insurance plan or seeing if you can join another person’s plan — such as your spouse or parent.

Why is open enrollment important?

Open enrollment periods help keep the insurance market stable by preventing people from only buying coverage when they are already sick or injured, which would dramatically increase costs for health insurance companies and lead to significantly higher premiums for policyholders.[18]

What happens if you don’t sign up for health care?

Residents of California, the District of Columbia, Massachusetts, New Jersey and Rhode Island must pay a fine if they fail to sign up for health insurance.[4][5][6][7][8] In other states, health insurance is still technically required, but there is no tax penalty for those who go without coverage.[19]

Do you have to apply for open enrollment every year?

You are generally reenrolled automatically during open enrollment if you already have Marketplace health insurance, so you may not need to manually shop for health insurance every year.[9]

Sources

  1. HealthCare.gov. “When Can You Get Health Insurance?” Accessed Oct. 7, 2025.
  2. Paycor. “Open Enrollment: A Complete Guide for Employers.” Accessed Oct. 7, 2025.
  3. Medicare.gov. “Joining a Plan.” Accessed Oct. 7, 2025.
  4. California Franchise Tax Board. “Personal Health Care Mandate.” Accessed Oct. 7, 2025.
  5. District of Columbia Department of Insurance, Securities and Banking. “Do You Know Your Health Insurance Rights?” Accessed Oct. 7, 2025.
  6. Massachusetts Health Connector. “Massachusetts Individual Mandate - State Tax Filing Process.” Accessed Oct. 7, 2025.
  7. New Jersey Department of the Treasury. “NJ Health Insurance Mandate - Shared Responsibility Payment (SRP).” Accessed Oct. 7, 2025.
  8. HealthSource RI. “RI Health Insurance Mandate.” Accessed Oct. 7, 2025.
  9. HealthCare.gov. “Automatic Re-Enrollment Keeps You Covered.” Accessed Oct. 7, 2025.
  10. HealthCare.gov. “Private Plans Outside the Marketplace Outside Open Enrollment.” Accessed Oct. 7, 2025.
  11. HealthCare.gov. “Renew, Change, Update, or Cancel Your Plan.” Accessed Oct. 7, 2025.
  12. PeopleKeep. “How To Get Out of Your Employer’s Group Health Plan Mid-Year.” Accessed Oct. 7, 2025.
  13. Justworks Help Center. “Common Questions: Renewals 2025-2026.” Accessed Oct. 7, 2025.
  14. HealthCare.gov. “Special Enrollment Period (SEP) - Glossary.” Accessed Oct. 7, 2025.
  15. HealthCare.gov. “Health Insurance Coverage for Children and Young Adults Under 26.” Accessed Oct. 7, 2025.
  16. Covered California. “Short-Term Health Insurance for Californians.” Accessed Oct. 7, 2025.
  17. New Jersey Department of Banking and Insurance. “Short-Term, Limited-Duration Insurance,” Page 2. Accessed Oct. 7, 2025.
  18. National Bureau of Economic Research. “Open Enrollment Periods and Plan Choices,” Page 2. Accessed Oct. 7, 2025.
  19. Internal Revenue Service. “Questions and Answers on the Individual Shared Responsibility Provision.” Accessed Oct. 7, 2025.

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