Navigating Open Enrollment: Insurance Choices That Tend to Catch People Off Guard
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In this article
Open enrollment windows are easy to misuse or ignore. Here's what to reassess each cycle and which assumptions are worth revisiting.
Key Takeaways
- Auto-renewing last year's plan without review often leads to mismatched coverage or higher costs.
- Networks, formularies, and deductibles can change year over year — even on the same plan.
- Employer contributions, life changes, and HSA eligibility all affect which plan actually fits your situation.
- Skipping dental, vision, or supplemental options during open enrollment can close a hard-to-reopen window.
Why Open Enrollment Deserves More Than a Default Click
Open enrollment comes around once a year, and for most people it arrives quietly — a reminder email, a deadline, and a default option that requires no action. That convenience is exactly what makes it a trap.
Plans change between years. Premiums shift. Drug formularies get updated. Provider networks expand or contract. What covered your needs last year may leave gaps next year, and the cost of a mismatch is borne entirely by you — often starting with the first medical bill of the new year.
This isn't just a health insurance issue. Employer benefits packages often include dental, vision, life, and disability options that reset annually. Missing a window to add or adjust those can mean going without coverage you'd otherwise want. See how coverage gaps form across different policy types to understand where the common blind spots lie.
~50%
Employees who don't change plans during enrollment
Research from benefits consulting firms consistently finds that roughly half of employees simply re-enroll in their existing plan each year without reviewing their options.
1 in 3
Workers who say they don't fully understand their benefits
Employee Benefits Research Institute surveys have found a significant share of workers lack confidence in understanding their health plan terms at enrollment time.
The good news: most of the costly mistakes are avoidable if you know what to look for before making a selection.
The Most Common Open Enrollment Mistakes — and How to Sidestep Them
The errors that cost people money during open enrollment are rarely dramatic. They're quiet: assumptions carried over from last year, numbers not compared, options not clicked. Understanding where the typical missteps happen is the starting point for making a more deliberate choice.
Automatically re-enrolling in last year's plan without reviewing what changed.
Why it happens: Most enrollment systems default to rolling over existing coverage, and the process feels low-stakes when nothing obvious changed in your life.
Choosing the lowest premium plan without accounting for total potential costs.
Why it happens: The monthly premium is the most visible number, making it easy to anchor decisions there and overlook deductibles, copays, and coinsurance.
Failing to check whether current prescriptions are still covered under the plan's formulary.
Why it happens: Drug formularies (the list of covered medications) can change between plan years, and most people don't think to verify this until they're at the pharmacy.
Ignoring dental, vision, or supplemental coverage options during open enrollment.
Why it happens: These feel optional or secondary, especially when the primary health plan decision already feels overwhelming.
Missing the opportunity to open or fund a Health Savings Account (HSA) when eligible.
Why it happens: HSAs require enrollment in a qualifying High-Deductible Health Plan (HDHP), and many people don't connect the plan selection to HSA eligibility until after enrollment closes.
Not accounting for recent life changes when selecting coverage levels.
Why it happens: People often treat open enrollment as a formality rather than a prompt to reassess needs that may have shifted throughout the year.
Your Doctors May Not Be In-Network Anymore
Provider networks are renegotiated annually, meaning a physician or specialist who was in-network last year may not be this year — even if the plan name hasn't changed. Before re-enrolling, verify that your current providers appear in next year's directory. Out-of-network care can trigger dramatically higher out-of-pocket costs, even with solid coverage otherwise.
For a broader look at how to audit your coverage systematically each year — not just during open enrollment — the annual coverage review checklist is a useful companion resource.
Making the Comparison Process Less Overwhelming
Coverage Gaps Can Be Costly and Hard to Fix
Once open enrollment closes, you generally cannot change your health plan until the next cycle unless you experience a qualifying life event. Choosing the wrong plan — or defaulting to last year's — can lock you into mismatched coverage for the full year. Review your options carefully before the deadline, and consult a licensed insurance agent or benefits advisor if you're unsure what fits your situation.
Comparing plans effectively doesn't require an insurance degree — it requires the right questions. Once you have the Summary of Benefits and Coverage documents for each option in front of you, focus on three things: what you'd pay monthly, what you'd pay before insurance starts covering costs (the deductible), and what the maximum you could owe in a bad year is (the out-of-pocket maximum).
Then layer in your actual usage: current prescriptions, regular providers, any care you're planning in the next 12 months. If you're new to this process, a first-timer's roadmap to open enrollment lays out the evaluation steps clearly.
If a life event happened during the year — a marriage, a new dependent, a job change — you may have already navigated a Special Enrollment Period. Those involve a different comparison process. Comparing health plans during a qualifying life event covers what that looks like.
Finally, check whether your assumptions about what your plan includes match reality. Common health coverage assumptions that diverge from reality is worth reading before you finalize your selection.
This article is for general informational purposes only and does not constitute insurance, financial, or legal advice. Coverage terms, eligibility, and costs vary by plan, employer, and state. Consult a licensed insurance agent or benefits advisor for guidance specific to your situation.
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Articles Haven Editorial Team is the collective byline for our editorial team and contributor network. Articles published under this byline or an editorial pen name are researched, written, and reviewed according to our editorial standards for clarity, consistency, and independence before publication.
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