Updated April 2026 · Florida Plan Finder · Licensed Florida Health Insurance Producer

10 Florida ACA Open Enrollment Mistakes to Avoid in 2026

Florida has one of the highest ACA enrollment rates in the country, with over 3.5 million residents enrolled in marketplace plans. But every year, a significant percentage of Florida enrollees make mistakes during Open Enrollment that cost them hundreds or even thousands of dollars — choosing the wrong plan, entering incorrect income, or skipping critical verification steps. Here are the ten most costly mistakes and how to avoid each one.

Mistakes 1–4: Income and Enrollment Errors

1. Wrong income estimate: Overestimating gets you less APTC; underestimating gets you a year-end repayment bill. Use your best projected annual MAGI — not last year's taxes if income has changed significantly. Self-employed? Use net income after business deductions.
2. Relying on auto-renewal: Auto-renewal locks you into a plan that may have changed networks, formulary, or premiums. Always actively compare plans every year — spending 15 minutes can save $1,000+.
3. Missing the December 15 deadline for January 1 coverage: Many Floridians assume they have until January 15. That's the final deadline, but January 15 enrollment starts February 1. If you want January 1 coverage, December 15 is your real deadline.
4. Not updating household information: Got married? Had a child? Divorced? Household changes affect subsidy amounts and CSR eligibility. Update your application even if you're renewing the same plan.

Mistakes 5–7: Plan Selection Errors

5. Choosing the lowest premium without checking deductible: A $0-premium Bronze plan can still expose you to $9,200 in annual costs with any significant health event. Compare total estimated annual cost (premium + expected cost-sharing), not just premium.
6. Not checking your medications in the formulary: Plan formularies change annually. A medication that was Tier 1 last year might be Tier 4 this year. Check every prescription drug in the new plan's formulary before re-enrolling.
7. Ignoring CSR eligibility: If your income is 100%–250% FPL, you qualify for CSR Silver plans with dramatically lower deductibles. Many Floridians in this range choose Bronze plans (lower premium) and miss out on CSR Silver plans that often have $0 net premium AND a $700 deductible instead of $9,200.

Mistakes 8–10: Verification and Coverage Gaps

8. Not verifying your doctors are in-network: Provider directories can be outdated. Always call your doctor's office directly to confirm they accept the specific plan you're enrolling in — not just the carrier broadly.
9. Not paying the first premium before the deadline: Enrollment on HealthCare.gov is not coverage. Coverage only activates after you pay the first premium to the carrier. Pay by December 31 for January 1 coverage — don't wait for the invoice.
10. Assuming COBRA is the only option after job loss: Losing employer coverage triggers a 60-day SEP for the ACA marketplace. For most subsidy-eligible Floridians, ACA coverage costs far less than COBRA. Always compare both before defaulting to COBRA.

The Most Expensive Mistake: Staying Uninsured

The most consequential mistake any Florida resident can make is going uninsured when coverage is available and affordable. An unexpected emergency — appendectomy, car accident, cancer diagnosis — can generate $50,000–$500,000 in medical bills. Many Florida hospitals have charity care programs, but they're not a substitute for insurance. With ACA subsidies available to households at 100%–400%+ FPL, the net cost of marketplace coverage is often remarkably low — sometimes $0/month. There's rarely a good financial argument for going uninsured when you qualify for marketplace coverage.