The two dates
Open Enrollment runs from November 1 to January 15. Inside that window there is a second date that matters more than people realise: December 15. Enroll by then and coverage generally begins January 1. Enroll after it and coverage usually begins February 1, which means January is a month you are paying for nothing and covered for nothing. Most of the panic we field in late January is somebody who assumed the whole window landed them a January start.
What to have in front of you
You will move much faster with: dates of birth and Social Security numbers for everyone on the application, last year's tax return or a realistic estimate of this year's household income, the names of the doctors you want to keep, and the names and doses of any prescriptions. If anyone in the household has other coverage available through a job, bring what that plan costs them, because it affects whether a premium tax credit is allowed.
Check one: who is actually on the application
Household for Marketplace purposes means the people you claim on the same tax return, which is not always the people living in the house. A grown child who files their own return is their own household. A partner you are not married to is usually separate. Getting this wrong changes the income calculation and therefore the credit, so it is worth two minutes of thought before you start.
Check two: the income estimate
You are estimating the coming year, not reporting the last one. If you know a contract ends in March or a second job starts in February, that belongs in the number. Estimate honestly rather than optimistically. Advance credit that turns out to be too large gets reconciled at tax time, and that is a genuinely unpleasant surprise.
Check three: Silver before Bronze
If your income lands roughly between 100% and 250% of the federal poverty level, Silver plans carry cost-sharing reductions that lower your deductible, copays and out-of-pocket maximum. No other tier does. Every year we meet somebody who picked Bronze to save fifteen dollars a month and gave up a deductible reduction worth thousands.
Check four: the network, by name
Look your doctors up in the plan's directory by name, not by clinic. Most Florida Marketplace plans are HMOs, so out-of-network care is generally not covered outside an emergency. Do the same for your prescriptions: a drug can be covered but sit on a tier that makes it expensive.
Check five: do not let it auto-renew unexamined
A plan that renews itself is not the same plan. Carriers change networks, add and drop counties, and reprice. The benchmark Silver plan that sets your credit changes too, so an identical plan can cost you more next year through no change of your own. Fifteen minutes in November is the cheapest fifteen minutes of the year.
If none of this applies to you
If your income is low enough that a credit does not reach you, or if there are children in the household, check Medicaid and Florida KidCare first. Those have their own rules and, for children, no Open Enrollment window at all. That is a call worth making in any month.