How to Compare Health Insurance Plans During Open Enrollment

Why This Year's Comparison Matters More Than Usual

Two things make this open enrollment different. First, insurers requested a median premium increase of roughly 15 percent for 2027, the second straight year of steep increases. Second, the enhanced premium tax credits that lowered Marketplace premiums from 2021 through 2025 expired at the end of 2025, so many shoppers will see noticeably higher prices than they are used to. Auto-renewing last year's plan without checking is the most expensive move you can make this season.

At the same time, the deadlines are real and tight. Medicare open enrollment started October 15, 2026 and ends December 7. Employer open enrollment is happening right now at most companies, usually only open for a few weeks. HealthCare.gov opens November 1, 2026 and runs through January 15, 2027, but you must enroll by December 15, 2026 for coverage to start January 1, 2027. Miss that and your coverage does not begin until February 1.

The 5 Numbers That Decide Every Comparison

1. Monthly premium. What you pay every month just to have the plan, whether you use care or not. Multiply by 12. This is your fixed cost, and it is the only cost you pay no matter what.
2. Annual deductible. What you pay out of pocket for covered care before the plan starts sharing costs. Preventive care like annual checkups and most screenings is usually free before the deductible, but lab work, specialists, imaging, and procedures generally are not.
3. Out-of-pocket maximum. The ceiling: the most you can be required to pay in a year for covered, in-network care. Deductible payments, copays, and coinsurance count toward it. Premiums do not. Once you hit it, the plan pays 100 percent of covered services for the rest of the year.
4. Coinsurance and copays. Your share after the deductible. Coinsurance is a percentage (commonly 20 percent, written as 80/20), copays are flat fees (often $25 to $50 for primary care, higher for specialists and ER visits).
5. Network. The list of doctors, hospitals, and pharmacies the plan contracts with. Out-of-network care costs dramatically more and may not count toward your out-of-pocket max at all. A plan is only a good deal if your doctors and prescriptions are in its network.

The formula you are really comparing: 12 months of premiums + your expected care costs, capped at the out-of-pocket max. That total is the honest number. Premium alone is a trick.

A Worked Example With Realistic Numbers

Take a plan with a $450 per month premium ($5,400 a year), a $2,000 deductible, an $8,000 out-of-pocket maximum, and 20 percent coinsurance after the deductible. Here is what three different years actually cost:

• Quiet year: $1,500 in medical bills. You never reach the $2,000 deductible, so you pay all $1,500. Total for the year: $5,400 in premiums + $1,500 in care = $6,900.
• Typical year: $6,000 in medical bills. You pay the first $2,000 (the deductible), then 20 percent of the remaining $4,000, which is $800. Care costs you $2,800. Total: $5,400 + $2,800 = $8,200.
• Rough year: $100,000 in medical bills. Your care costs hit the $8,000 out-of-pocket maximum and stop there; the plan pays the rest of covered care. Total: $5,400 + $8,000 = $13,400.

Now run the same three years for a rival plan with a $700 per month premium ($8,400 a year) but a $1,000 deductible and a $4,000 out-of-pocket max. Quiet year: $8,400 + $1,500 = $9,900, worse than the first plan. Rough year: $8,400 + $4,000 = $12,400, better than the first plan. The "cheapest" plan flips depending on how much care you use, which is why the single-premium comparison fails.

The practical version: estimate your likely year honestly. Healthy with no prescriptions? The low-premium, high-deductible plan usually wins. Ongoing medication, regular specialists, or a planned surgery or birth? The higher premium with the low deductible and low out-of-pocket max usually wins.

Steps to Compare Plans in One Sitting

1. Pull the summaries side by side. Get the Summary of Benefits and Coverage (SBC) for each candidate plan. It is a standardized document, so the same five numbers appear in the same places.
2. Extract the five numbers for each plan. Premium, deductible, out-of-pocket max, coinsurance and copays, and confirm the network covers your doctors and prescriptions. If a plan lacks your doctor, stop comparing and cross it off.
3. Estimate your care year. Look at last year: prescriptions, specialist visits, labs, any planned procedures for next year. Build a quiet-year and rough-year estimate for each plan using the example math above.
4. Add the premiums. 12 months of premiums plus expected care costs, capped at the out-of-pocket max. This is each plan's true yearly cost for your situation.
5. Check the fine print on prescriptions. Drug formularies change yearly. A plan that looks cheaper can cost thousands more if your medication sits on a high tier or needs prior authorization.
6. Enroll before the deadline. For HealthCare.gov, December 15, 2026 gets you January 1, 2027 coverage. For Medicare, December 7, 2026 is the cutoff. Employer plans follow your employer's window, which is usually only a few weeks.

Mistakes That Cost People Thousands

• Comparing premiums alone. The $450/month plan beat the $700/month plan in a quiet year and lost in a rough year. Premium is one input, not the answer.
• Auto-renewing without checking. Plan prices, networks, and drug formularies change every year. Renewing blind is how people discover in March that their doctor is out of network.
• Ignoring the network. The out-of-pocket max often applies only to in-network care. An out-of-network surgery can bypass your ceiling entirely.
• Forgetting premiums don't count toward the max. Your $5,400 a year in premiums is gone regardless. The out-of-pocket max caps care costs only.
• Assuming last year's subsidies still apply. The enhanced premium tax credits expired at the end of 2025. Recalculate what you actually owe at today's prices before you commit.
• Skipping the prescription check. Two plans can look identical on the five numbers and differ by thousands once your actual medications are priced against each formulary.

Related Reading

If you are 65 or turning 65, read our Medicare Advantage vs Medigap guide before Medicare open enrollment closes December 7. If a claim ever gets denied, our insurance claim denial appeal guide walks through the process step by step. And if you are comparing employer benefits, our Dependent Care FSA vs Child Care Tax Credit guide covers a decision that interacts with the same open enrollment window.

Frequently Asked Questions

What are the most important things to compare in health insurance plans?

Five numbers decide every comparison: monthly premium, annual deductible, out-of-pocket maximum, coinsurance and copays, and network. Compare plans on all five together, not on premium alone. A cheap premium with a high deductible and out-of-pocket max can cost thousands more in a year you actually need care.

When is open enrollment for health insurance in 2026?

Medicare open enrollment runs October 15 to December 7, 2026. HealthCare.gov open enrollment for 2027 coverage runs November 1, 2026 through January 15, 2027, with a December 15, 2026 deadline for coverage starting January 1, 2027. Some states run their own marketplaces with different dates, and employer plan enrollment dates vary by employer.

Is a low premium or a low deductible better?

It depends on how much care you use. If you are healthy and rarely see a doctor, a low premium with a high deductible usually costs less over the year. If you have ongoing prescriptions, regular specialists, or a planned procedure, a higher premium with a low deductible often wins. Run the math for a quiet year and a rough year before deciding.

What is the difference between a deductible and an out-of-pocket max?

The deductible is what you pay first before the plan starts sharing costs. The out-of-pocket maximum is the most you can be required to pay in covered care in one year; after you hit it, the plan pays 100 percent of covered services. Deductible payments, copays, and coinsurance generally count toward the out-of-pocket max, but premiums do not.

Does the out-of-pocket max include my monthly premiums?

No. Premiums are separate and do not count toward the deductible or the out-of-pocket maximum. When you estimate your true yearly cost, add 12 months of premiums on top of your expected care costs up to the out-of-pocket max.

What does 80/20 coinsurance mean?

After you meet your deductible, the plan pays 80 percent of covered costs and you pay 20 percent, until your payments reach the out-of-pocket maximum. So on a $2,000 covered bill after the deductible is met, you would owe $400 and the plan would pay $1,600.

Why are health insurance premiums higher for 2027?

Insurers requested a median premium increase of roughly 15 percent for 2027, the second straight year of steep increases, and the enhanced premium tax credits created during the pandemic expired at the end of 2025. That means many Marketplace shoppers may pay noticeably more than in prior years, which makes comparing plans carefully this open enrollment especially important.

Is the CyberScryb health insurance plan explainer free?

Yes. Every tool on CyberScryb is free with no signup. The health insurance plan explainer runs entirely in your browser: paste a plan summary and it translates the jargon into plain English and estimates your yearly cost.