Healthcare Costs Just Crossed $18,500 Per Employee: How to Win at Open Enrollment This Year

There's a window most people treat like a bureaucratic chore that is actually one of the most consequential financial decisions of the year. Open enrollment typically lasts two to four weeks, usually in October or November, and the choices you make during it will shape your healthcare costs — and your tax picture — for the next twelve months.

The stakes have gotten higher. Mercer's 2026 projections put average employer health benefit costs above $18,500 per employee, up 6.7 percent from the prior year. What that number hides is the direction of movement: a majority of large employers are responding by shifting more of the cost to workers through higher deductibles, larger copays, and reduced employer contributions to health accounts. The figure your employer pays is going up. So is the figure you pay.

Understanding the choices in front of you — not just selecting the plan that looks familiar — is worth your time this year more than most.

Why Healthcare Costs Keep Climbing

Three forces are driving the 2026 increases, and knowing them helps you understand what might change in coming years.

GLP-1 medications. Drugs like semaglutide and tirzepatide are genuinely effective for weight loss and diabetes management, and they're expensive — often $800 to $1,000 per month before insurance. As utilization grows, they're becoming a meaningful line item in employer health plan budgets. Employers who cover them at all are increasingly adding utilization management requirements.

Specialty pharmaceuticals. Biologics for autoimmune conditions, cancer treatments, gene therapies — these medications can cost $50,000 to $500,000 per patient per year. The small percentage of plan members using them drives a disproportionate share of total cost, which gets distributed across all members through premiums.

Hospital consolidation. Over the past decade, independent hospitals and physician practices have consolidated into large health systems. Reduced competition means less price pressure. The same procedure at a consolidated hospital system costs meaningfully more than it did when there were multiple competing providers in the same market.

HDHP + HSA vs. PPO: The Real Math

The central decision in most employer enrollment menus is whether to choose a High Deductible Health Plan (HDHP) paired with a Health Savings Account (HSA), or a traditional Preferred Provider Organization (PPO) plan. The framing of this choice matters.

An HDHP has lower monthly premiums and higher out-of-pocket costs. You pay less each month but more when you actually use healthcare. A PPO has higher premiums and lower out-of-pocket costs — you pay more each month regardless of usage, but your costs when you do use healthcare are lower.

The break-even calculation: add up what you'd spend in premiums for the year under each plan. Then estimate your expected out-of-pocket costs under each plan given your anticipated healthcare usage. The plan with the lower total is the better deal for your situation — but the calculation depends entirely on how much healthcare you actually expect to use.

For a healthy 30-year-old with no chronic conditions and minimal expected utilization, the HDHP typically wins. The premium savings often exceed the higher deductible, especially when you account for the HSA tax benefit. For someone managing a chronic condition, undergoing planned surgery, or with a family that uses healthcare regularly, the PPO's lower cost-sharing often makes the higher premium worthwhile.

When the Higher-Premium PPO Actually Saves You Money

The PPO earns its premium in specific circumstances:

Chronic conditions requiring regular care. If you or a family member has diabetes, hypertension, autoimmune disease, or any condition requiring regular specialist visits and prescriptions, the PPO's lower cost-sharing typically produces better financial outcomes even after accounting for the premium difference.

Planned medical procedures. If you know going into enrollment that you'll need surgery, physical therapy, mental health treatment, or ongoing lab work, the math usually favors the PPO. You're paying the deductible either way; paying a higher premium to have cost-sharing kick in sooner is rational.

Large families with unpredictable healthcare needs. Children generate healthcare costs that are difficult to predict. More members means a higher probability that someone in the family will hit or approach the deductible. The risk profile shifts toward the PPO.

The HSA: The Most Powerful Triple-Tax-Advantaged Account Most People Underuse

If you choose an HDHP, the Health Savings Account deserves serious attention. It is, without exaggeration, one of the most tax-efficient accounts available to anyone who has access to it.

The triple tax advantage: contributions are pre-tax (reducing your taxable income), money grows tax-free inside the account, and withdrawals for qualified medical expenses are tax-free. No other common account structure does all three.

The 2026 HSA contribution limits are $4,300 for individuals and $8,550 for families (plus a $1,000 catch-up contribution for those 55 and older). These are the maximums — you can contribute less — but maxing out when you can is worth doing.

What most people miss: the HSA has no use-it-or-lose-it requirement. The balance rolls over indefinitely. You can invest the funds in mutual funds or index funds once your balance exceeds a threshold (usually $1,000 to $2,000 depending on the account provider). Over time, an HSA can accumulate into a meaningful healthcare reserve — particularly valuable in retirement, when healthcare costs rise and HSA withdrawals for any purpose after age 65 are taxed only as ordinary income, removing the medical-expense restriction entirely.

The highest-return use of an HSA: contribute to the maximum, invest the balance, pay current healthcare costs out of pocket if you can afford to, and save your receipts. You can reimburse yourself for past medical expenses at any point in the future with no time limit. This lets the invested balance compound tax-free for years or decades.

FSA vs. HSA: Not the Same Thing

A Flexible Spending Account (FSA) is available with most plan types, including PPOs. An HSA is only available with an HDHP. They're different in important ways:

The FSA is primarily use-it-or-lose-it. Most plans allow a small rollover ($660 in 2026) or a grace period, but if you don't use the balance, you forfeit it. The FSA is also not portable — it's tied to your employer, and if you leave the job, you typically lose the remaining balance.

The HSA rolls over indefinitely, is portable (it's your account, not your employer's), and can be invested. For someone with an HDHP, the HSA is clearly superior to any FSA. For someone with a PPO, an FSA is still a useful tax-saving tool for predictable medical expenses — just be conservative with what you elect, since over-contributing means forfeiting the excess.

How to Estimate Next Year's Medical Spend

The most useful thing you can do before open enrollment is look at your Explanation of Benefits (EOB) statements from the past two years. Your insurer mails or posts these online. They show what was billed, what your insurance covered, and what you paid out of pocket.

Average your out-of-pocket costs over the past two years, then adjust upward by roughly 5-7 percent for expected cost inflation. Add any known upcoming expenses: a planned surgery, a pregnancy, a new prescription, regular therapy sessions. This estimate won't be perfect, but it's far more accurate than guessing.

Compare this estimate against the HDHP deductible. If your estimated spend is well below the HDHP deductible and the premium savings are meaningful, the HDHP is worth considering. If your estimated spend is likely to push past or near the deductible, the calculus shifts.

Six Questions to Ask HR During Open Enrollment

Most employees approach open enrollment by scrolling through a benefits portal without engaging HR directly. These six questions change the quality of the decision:

1. Is my current doctor in-network under each plan option? Network differences between plans matter enormously. An out-of-network specialist under an HDHP can cost several times what an in-network visit costs, completely offsetting premium savings.

2. What changed from last year? Employers often make coverage changes — to networks, formularies, cost-sharing structure — without prominently advertising them. Ask specifically what's different in 2026 versus 2025.

3. Does the employer seed the HSA? Many employers contribute a lump sum ($250, $500, $1,000, or more) to the HSA for employees who choose the HDHP. This can dramatically shift the math. If the employer contributes $1,000 and the premium savings are $80/month, the HDHP premium savings alone cover the deductible difference in many cases.

4. How does the family deductible work — embedded or aggregate? For family plans, this distinction is significant. An embedded deductible means each family member has their own individual deductible before insurance begins paying for them, and the family deductible is a ceiling. An aggregate deductible means all family members' costs pool together and insurance only kicks in after the aggregate is met — which can leave individual members unprotected early in the year.

5. What is the mental health network like? Mental health parity laws require equal coverage, but network adequacy varies widely. Ask specifically whether the plan has in-network behavioral health and substance use providers in your area and what the wait times look like.

6. What happens to my FSA or HSA if I leave the company mid-year? Understanding portability before you need it prevents expensive surprises.

FAQ

Can I switch plans mid-year if I make the wrong choice?
Generally no, unless you experience a qualifying life event — marriage, divorce, birth, adoption, job change, or loss of other coverage. Open enrollment is the standard window. Choosing carefully once is better than wishing you could change.

What counts as a "qualified medical expense" for HSA withdrawals?
The IRS list is broad: doctor visits, hospital stays, prescription drugs, dental and vision care, mental health treatment, and more. Over-the-counter medications became eligible after 2020. The IRS Publication 502 is the authoritative list.

Should I max out my HSA contributions even if I expect low medical expenses?
Yes, if you can afford it. The investment growth and the future optionality are worth more than the liquidity cost of contributing. Think of it as a medical emergency fund that also grows tax-free.

Is the HDHP ever the wrong choice even for healthy people?
Yes — if a healthy person has a major unexpected medical event and hasn't built up their HSA yet, the high deductible can be a significant short-term financial burden. If you're choosing an HDHP, having cash or HSA funds available to cover the deductible before you need them is important.