How to Evaluate Employer Health Insurance Plans

Open enrollment arrives every year with a stack of PDFs, a benefits portal that times out, and a deadline that feels closer than it is. Most people glance at the monthly premium, pick the plan that looks familiar, and move on. That approach can cost a family thousands of dollars a year — sometimes tens of thousands — because the premium is only one part of what a health plan actually costs you. This guide walks you through every number that matters: how to calculate the true annual cost of each plan option, how employer contributions create a hidden math problem for families, how to decide between an HDHP and a PPO, and when it genuinely makes sense to put your spouse on a completely separate plan.

Start With True Annual Cost, Not Just the Premium

The monthly premium is what you pay to have coverage. It is not what you pay to use coverage. To compare plans honestly, you need a single number that captures both.

True Annual Cost = (Monthly Premium × 12) + Expected Out-of-Pocket Costs

Out-of-pocket costs include your deductible (the amount you pay before insurance starts sharing costs), copays (flat fees per visit), and coinsurance (your percentage share after the deductible). Every plan has an out-of-pocket maximum — a ceiling on what you can be charged in a single year, after which the insurer pays 100%. If those terms are unfamiliar, our guide to deductibles, copays, and coinsurance explains each one.

How you estimate out-of-pocket costs depends on your health:

• Low utilization (generally healthy, few visits per year): Add up the copays for your typical annual visits — a primary care visit, maybe one specialist, your prescriptions. Your expected out-of-pocket is probably a few hundred dollars.
• High utilization (chronic condition, planned procedure, or young children): Assume you could hit your full deductible plus coinsurance up to the out-of-pocket maximum. This is your worst-case scenario and the number that should drive the decision.

A Concrete Example

Suppose your employer offers two plans:

• Plan A (PPO): $280/month premium, $1,500 deductible, $6,000 individual out-of-pocket maximum
• Plan B (HDHP): $140/month premium, $3,000 deductible, $5,000 individual out-of-pocket maximum

For a healthy person with two primary care visits and a generic prescription:

• Plan A true annual cost: ($280 × 12) + $300 in copays = $3,660
• Plan B true annual cost: ($140 × 12) + $300 = $1,980

For someone who hits their full out-of-pocket maximum due to a surgery:

• Plan A true annual cost: ($280 × 12) + $6,000 = $9,360
• Plan B true annual cost: ($140 × 12) + $5,000 = $6,680

In both scenarios, the HDHP comes out ahead for this particular example — but that comparison flips if the person cannot afford to pay a $3,000 deductible out of pocket in an emergency. More on that in the HDHP vs. PPO section below.

Industry Benchmarks: What "Normal" Looks Like

You cannot judge your plan options without context. Here is a reasonable baseline for what employer plans look like in the mid-2020s:

• A $3,800 individual deductible and a $9,200 individual out-of-pocket maximum are middle-of-the-road for employer plans.
• $10,000 family deductibles are common, particularly on HDHP options.
• Some large employer plans carry family out-of-pocket maximums above $35,000 — a number that can mean financial devastation if a family member has a serious illness or hospitalization.

If your plan's numbers are worse than these benchmarks and a better option exists on your employer's menu, that is worth a hard look. And if your employer's best plan is still expensive, the ACA marketplace may offer competitive options depending on your income — though if your employer plan meets the ACA's affordability threshold, marketplace subsidies typically will not apply to you personally. Healthcare.gov explains how job-based coverage interacts with marketplace eligibility.

The Employer Contribution Gap: Why Adding a Spouse Gets Expensive

Here is the number your benefits portal does not prominently display: how much your employer contributes toward your premium versus how much they contribute toward family or spouse coverage.

Employers typically pay a large share of the employee-only premium — often 70% to 85% of it. But their contribution toward spouse or family tiers is frequently far lower in percentage terms, and sometimes zero beyond what they already pay for you. The result is that the difference between your employee-only premium and your employee-plus-spouse premium can be almost entirely your cost.

Ask HR this question directly: "What dollar amount does the employer contribute toward the employee-only premium, and what do they contribute toward the family or spouse tier?" The answer changes the entire math.

The Spouse-on-the-Marketplace Strategy

If your employer pays most of your employee-only premium but little toward family coverage, compare these two scenarios side by side:

1. Option A: You on your employer plan (employee-only tier) + your spouse added to that same plan
2. Option B: You on your employer plan (employee-only tier) + your spouse enrolled separately on the ACA marketplace

Your spouse may qualify for a premium tax credit (subsidy) on the ACA marketplace — but only if they are not enrolled in your employer plan and only if your employer's coverage is not considered "affordable" for them under ACA rules. This is an important nuance: ACA affordability is calculated based on the employee-only premium cost relative to household income, not the family premium cost. If the employee-only premium at your job is affordable but the family premium is not, your spouse may still qualify for a marketplace subsidy. This is sometimes called the "family glitch," and a 2022 IRS rule change expanded subsidy access for some affected families.

Additionally, some employers charge a spousal surcharge — an extra monthly fee if you add a spouse who has access to their own employer-sponsored coverage. This can add $50 to $200 per month to your premium and tips the math further toward the separate-plan approach.

This calculation is genuinely complex and depends on your household income, your state, the specific plans available on your state's marketplace, and whether your employer's plan meets affordability standards. Do not skip the comparison — the savings can be significant. Spouses who lose access to employer coverage or experience qualifying life events may have a special enrollment window on the marketplace.

HDHP vs. PPO: A Decision Framework That Actually Works

The right choice between a high-deductible health plan (HDHP) and a preferred provider organization (PPO) depends almost entirely on how much healthcare you expect to use and whether you have savings to cover a large bill. For a deeper look at plan type differences, see our guide on HMO vs. PPO vs. EPO plans.

When an HDHP Usually Makes Sense

• You are generally healthy and use healthcare infrequently
• You have enough emergency savings to cover the full deductible without going into debt
• You want to take advantage of an HSA (see below)
• The annual premium savings are large enough to offset even a bad year

When a PPO Usually Makes Sense

• You have a chronic condition requiring regular treatment, specialist visits, or ongoing prescriptions
• You have young children who tend to use healthcare frequently
• You are planning a procedure, pregnancy, or surgery in the coming year
• You could not pay a $3,000 to $6,000 deductible without financial hardship — a real scenario that makes the HDHP's lower premium irrelevant the moment something goes wrong

The Worst-Year Test

Run this calculation to find out how the plans compare even if everything goes wrong:

(PPO annual premium) vs. (HDHP annual premium + HDHP deductible)

If the HDHP comes out cheaper even after adding its full deductible, the HDHP may be the better financial choice — assuming you have the cash on hand to pay that deductible. If the PPO is cheaper in the worst-case scenario, the HDHP is only better for people who stay healthy.

The HSA Advantage: A Tax Benefit Worth Real Money

HDHPs come with eligibility for a Health Savings Account (HSA) — one of the most tax-advantaged accounts in the U.S. tax code. Contributions go in pre-tax, grow tax-free, and come out tax-free when used for qualified medical expenses. That triple benefit is available in no other account type.

For 2025, the IRS contribution limits are $4,150 for individual coverage and $8,300 for family coverage. The IRS publication on HSA eligibility and limits is the authoritative source for these figures.

Unlike a Flexible Spending Account (FSA), HSA funds roll over every year with no expiration. If you switch to a PPO next year, the balance in your HSA is still yours and can still be used for any qualified medical expense. If you invest the HSA balance, it can grow for decades — many people use it as a supplemental retirement account, since after age 65 withdrawals for any purpose are taxed like a traditional IRA, with no penalty.

If you are considering an HDHP, factor in the HSA contribution as part of your annual cost calculation. An employer who contributes $500 to your HSA is effectively reducing your deductible exposure by that amount. Our full guide to using your HSA effectively covers investment strategies and eligible expenses.

The Medical Loss Ratio: Why Your Coworkers Affect Your Premium

Your employer's health plan is essentially a shared pool. The insurer collects premiums from everyone in the group, then pays out claims. When claims are high — because multiple employees had expensive hospitalizations, specialty drugs, or chronic conditions — the insurer raises premiums at renewal. This is reflected in something called the Medical Loss Ratio (MLR), which measures what percentage of premiums collected are paid back out as claims.

In practical terms: if your company has had a particularly expensive year, your plan premiums may increase at renewal regardless of your own health or usage. This is not something any individual employee can control. It is worth knowing because it explains why premiums sometimes increase sharply even when nothing about your personal health changed.

Questions to Ask HR Before You Choose

Most of the information that changes the math is not on the benefits summary page. Get direct answers to these before your deadline:

1. What dollar amount does the employer contribute toward the employee-only premium, and how much toward the family or spouse tier? This reveals the true cost of adding a dependent.
2. Is the out-of-pocket maximum combined for medical and pharmacy, or are they separate? A plan with a $7,000 medical OOP max and a separate $3,000 pharmacy OOP max has a true worst-case exposure of $10,000, not $7,000.
3. Does the HDHP option come with an employer HSA contribution? Some employers seed your HSA with $500 to $1,500 annually, which directly offsets deductible risk.
4. Is there a spousal surcharge if my spouse has access to their own employer coverage?
5. What network do these plans use, and are my current doctors in it? A plan with lower premiums that excludes your specialist is not a bargain.

What to Do Now

Open enrollment windows are typically two to four weeks. That is enough time to do this right.

Start by pulling the Summary of Benefits and Coverage (SBC) document for each plan your employer offers — every plan is legally required to provide one in a standardized format. Write down the annual premium, deductible, out-of-pocket maximum, and key copays for each option. Then run the true annual cost formula for both a low-utilization year and a worst-case year.

If you have a spouse or dependents, ask HR for the employer contribution breakdown before assuming that adding them to your plan is the obvious move. If the numbers favor separate plans, use the ACA marketplace calculator at Healthcare.gov to estimate what your spouse's coverage would cost there.

If you are deciding between an HDHP and a PPO, apply the worst-year test. If the HDHP is cheaper even in the worst case and you have the savings to cover the deductible, it is almost certainly the right choice. If you cannot cover the deductible without going into debt, the PPO's predictability has real value.

If you enrolled in a plan that turned out to be wrong for your situation, see our guide on what to do if you enrolled in the wrong plan — there are limited but real options depending on your circumstances and timing.

The goal is not to find the perfect plan. It is to make a deliberate choice based on your actual numbers rather than defaulting to last year's selection. For most households, taking one hour to run this math is worth more than almost any other financial decision made that month.

Sources: Healthcare.gov — Job-Based Health Coverage, IRS Publication 969 — Health Savings Accounts and Other Tax-Favored Health Plans, Healthcare.gov — Special Enrollment Periods