Open Enrollment Guide: How to Pick the Right Health Insurance Plan Every Year

Why Auto-Renewing Is Costing You Money

Every year during open enrollment, plan structures change. Networks shift — your doctor might be in-network this year and out next year. Premiums adjust. Formularies update — your medication might move to a higher cost tier. Deductibles and copays change. The plan that was perfect last year might be overpriced or poorly structured for your needs this year. Auto-renewing without comparing is how most people overpay for health insurance.

Open enrollment for employer plans typically runs in November. The ACA marketplace enrollment period runs November 1 through January 15. Medicare open enrollment is October 15 through December 7. Whatever your enrollment window, treat it as an annual financial planning event, not a nuisance to dismiss with a quick click.

Step 1: Audit Your Current Usage

Before comparing plans, understand how you actually used healthcare in the past year. How many doctor visits? Which specialists? How many prescriptions and what are they? Any procedures, imaging, or lab work? Any ER visits or hospitalizations? This usage history predicts your likely costs under different plan structures.

Check your current plan’s explanation of benefits statements for the year. Most insurers provide an annual summary showing total costs — what the plan paid and what you paid. This is your baseline for comparison. If you paid $2,000 in premiums plus $3,000 out of pocket, your total healthcare cost was $5,000. Any plan you consider should beat that number based on your expected usage.

Step 2: Check Your Providers and Medications

Before considering any plan, verify that your doctors, specialists, and preferred hospitals are in-network. Every plan’s website has a provider directory — use it. Also verify your medications are on the plan’s formulary and check which tier they fall in. A medication on Tier 2 with a $30 copay at one plan might be Tier 4 with a $100 copay at another. Over 12 months, that difference alone is $840.

Step 3: Calculate Total Annual Cost

The only number that matters is total expected annual cost: premiums plus expected out-of-pocket expenses. A plan with a $200/month premium and $3,000 deductible costs more than a plan with $350/month premium and $500 deductible if you use more than moderate healthcare. Conversely, if you are healthy and rarely use care, the low-premium high-deductible plan wins because you never hit the deductible.

For each plan you are considering, calculate: 12 months of premiums, plus your expected deductible spending based on last year’s usage, plus copays for your expected visits and prescriptions, plus coinsurance for any procedures you anticipate. The plan with the lowest total is the best financial choice regardless of which individual component — premium, deductible, or copay — looks cheapest in isolation.

Step 4: Evaluate the HSA Option

If an HDHP with HSA eligibility is available, run the numbers separately. The lower premium creates savings that can be deposited into the HSA, where they grow tax-free and can be used tax-free for medical expenses. For healthy individuals and families, the HDHP plus HSA often produces the lowest total cost while building a tax-advantaged medical savings fund.

Step 5: Check for Subsidies

If buying through the ACA marketplace, check your subsidy eligibility. Premium tax credits reduce your monthly cost based on household income relative to the federal poverty level. Cost-sharing reductions lower your deductibles and copays on Silver-tier plans. Many people qualify for significant subsidies and do not realize it — or assume they earn too much when they actually qualify. Use the marketplace calculator at Healthcare.gov to check before dismissing marketplace plans.

Do Not Default to the Same Plan

Spending one to two hours during open enrollment comparing plans saves hundreds to thousands of dollars annually. The effort-to-reward ratio is among the best of any personal finance activity. Treat it like an annual investment review — because that is exactly what it is.