Open enrollment season is here, and for most Americans with job-based coverage, the clock runs out on December 15.
That leaves a narrow window to make decisions that can swing your out-of-pocket costs by hundreds, sometimes thousands, of dollars next year.
The average worker now pays about $6,500 a year just in premiums for family coverage, according to KFF's latest employer survey, while deductibles keep climbing.
Choosing the same plan on autopilot is the easiest way to overpay.
Start with one number: your total expected spending, not just the premium.
Add up the monthly cost, the deductible, and the copays you'll realistically hit, then compare plans on that full picture.
A cheaper premium often hides a deductible so high that a single ER visit wipes out the savings.
Next, check whether your doctors and medications stay in network for 2026.
Insurers shuffle their provider lists every year, and that specialist you've seen for a decade may be out of network in January.
Pull up your plan's formulary and confirm each prescription is still covered at a tier you can afford.
Then look at the accounts most people skip.
An FSA lets you set aside pre-tax money for medical costs, but the funds typically don't roll over, so estimate carefully.
An HSA, paired with a high-deductible plan, belongs to you even if you change jobs, and the 2026 contribution limits are higher again.
If your employer offers a matching HSA contribution, grab every dollar of it.
That's free money that quietly compounds, and many workers leave it on the table simply because they never opened the account.
Finally, don't forget the people you cover.
Adding a spouse or dependent mid-year isn't allowed unless you have a qualifying life event, so verify everyone's enrollment now.
A missing name in January means a scramble and possibly a gap in coverage.
Spending twenty minutes with your benefits portal this week beats discovering the problem in a hospital billing office next spring.
The deadline doesn't move, and neither do the bills.
The real trap isn't picking the "wrong" plan — it's not looking at all.
Final Thoughts
Most people could cut their health costs meaningfully with one honest hour of math, and the only thing standing between them and that savings is a deadline that quietly passes every December.