How to Enroll in Marketplace Health Insurance

Open Enrollment is the stretch of the year when most people can start or change a Marketplace plan, and the deadline for coverage beginning January 1 lands a full month before the window shuts. The other surprise is that the application may not run through healthcare.gov at all.

Put the Open Enrollment dates on the calendar

The healthcare.gov page on dates and deadlines states, as of September 2026, that Open Enrollment for 2027 coverage starts November 1. It gives December 15 as the last day to enroll in or change plans for coverage to start January 1, and January 15 as the end of Open Enrollment. Coverage starts January 1 for those who enroll by December 15 and pay the first premium, and February 1 for those who enroll December 16 through January 15.

Check whether the state runs its own Marketplace

The healthcare.gov page on the Marketplace in your state says how you apply depends on whether your state has its own Marketplace, and offers a state picker. As of September 2026 it also notes that from November 1, Oregon residents use a separate state site for 2027 coverage.

Create an account and gather what the application asks for

The get ready to apply page links a checklist listing what to have ready: everyone in the household, including people not applying; home and mailing addresses; a Social Security number for each person; how taxes will be filed; employer and income details; a best estimate of household income for the year applied for; and current coverage information.

Submit the application and compare what it returns

The healthcare.gov quick guide describes creating an account with name, address, and email, then submitting the application for eligibility results showing any premium tax credit or lower cost sharing. The income page says savings are based on expected income for the year you want coverage, not last year's, and that the application goes to the state agency where someone looks likely to qualify for Medicaid or the Children's Health Insurance Program. The guide then says to compare the plans and prices available in your area and enroll in one. The checklist states that HealthCare.gov is the official place to get Marketplace insurance.

Pay the first premium to start the coverage

The healthcare.gov page on completing enrollment states that coverage will not start until the first premium is paid, and that premiums go directly to the insurance company rather than the Marketplace. It describes paying from the Marketplace account by choosing the option to pay the first monthly premium, which hands off to the insurer.

Use a Special Enrollment Period after the window closes

The healthcare.gov page on coverage outside Open Enrollment lists qualifying events including marriage, a birth or adoption, a move, and loss of job-based, Medicaid, or student coverage. The eligibility page gives usually up to 60 days following the event to enroll, and says missing that window means waiting for the next Open Enrollment Period.

For free help with the application. The healthcare.gov page on how to apply says free, non-biased personal help is available, and Find Local Help searches by ZIP code for an agent, broker, or assister nearby.

Sources. Dates and deadlines, the Marketplace in your state, application checklist, complete your enrollment.