Employer health insurance can look inexpensive when the only number you notice is the deduction on your paycheck. An employee paying $120 a month for individual coverage might reasonably think their health insurance costs $1,440 a year.
That is only one version of the cost.
There is the employee's premium contribution, the much larger share the employer often pays, the deductible and other expenses that appear when healthcare is used, and sometimes extra contributions for a spouse or children. There can also be employer HSA contributions or tax advantages that offset part of the burden.
The result is that two employees enrolled in plans with similar monthly premiums can have very different healthcare budgets.
If I wanted to understand what job-based insurance really costs, I would separate the question into three parts: what comes out of the paycheck, what comes out of the wallet when care is used, and what the employer is contributing in the background.
The Average Employee Pays Only Part of the Premium
Employer-sponsored health insurance remains heavily subsidized by employers.
The latest nationwide employer survey available, KFF's 2025 Employer Health Benefits Survey, found that average total annual premiums reached $9,325 for single coverage and $26,993 for family coverage.
Employees did not pay those full amounts.
On average, workers contributed:
- $1,440 per year, or about $120 per month, for single coverage
- $6,850 per year, or about $571 per month, for family coverage
That worked out to approximately 16% of the single premium and 26% of the family premium, with employers paying the rest on average. The latest employer premium data also show enormous variation between workplaces.
For example, workers at firms with 10 to 199 employees contributed an average of $8,889 toward family coverage, compared with $6,227 at larger firms.
Those averages are useful benchmarks, not quotes.
One employer may pay the entire employee-only premium but require workers to pay a large share for dependents. Another may heavily subsidize the entire family. Some workers pay several thousand dollars more than the national average.
The health insurance deduction on your paycheck tells you what your employer asks you to contribute, not what the insurance actually costs.
That employer contribution is an important part of compensation even though it never reaches your bank account as wages.
Family Coverage Is Often Where the Price Changes Dramatically
A common open-enrollment surprise happens when someone moves from employee-only coverage to employee-plus-spouse or family coverage.
An employer might subsidize employee coverage very generously while contributing much less toward dependents.
Suppose an employee pays:
Employee only: $110 per month
Employee plus spouse: $475 per month
Family: $620 per month
The employee-only option costs $1,320 annually.
Family coverage costs $7,440.
The underlying insurance did not suddenly become six times better. The employer may simply be contributing a different percentage toward each enrollment tier.
That means a married couple with access to two employer plans should not automatically put everyone on one policy.
Sometimes it is less expensive for each spouse to enroll in their own employer's plan. In another household, one employer may subsidize dependents so heavily that one family policy clearly works better.
There can also be spousal surcharges when a spouse has access to coverage from another employer.
I would compare:
- Employee-only premium at Employer A
- Employee-only premium at Employer B
- Employee-plus-spouse premiums
- Family premiums
- Spousal surcharges
- Deductibles
- Out-of-pocket maximums
- Provider networks
- Prescription coverage
- Employer HSA contributions
The best household arrangement may not be the most obvious one.
The Premium Is Only the First Employee Cost
Once coverage begins, healthcare use introduces a second layer of spending.
That can include:
- Deductibles
- Office visit copays
- Specialist copays
- Coinsurance
- Prescription costs
- Emergency care
- Hospital cost-sharing
- Out-of-network expenses
The 2025 KFF survey found that among workers enrolled in plans with a general annual deductible, the average single deductible was $1,886.
For employees at firms with 10 to 199 workers, the average was even higher at $2,631.
This is why someone paying only $100 a month for insurance can still face several thousand dollars of healthcare spending during a busy medical year.
Imagine two employees.
Maria contributes $2,000 annually toward a plan with a $1,000 deductible and $4,500 out-of-pocket maximum.
Daniel contributes only $1,200 in premiums but has a $3,500 deductible and $7,000 out-of-pocket maximum.
Daniel's coverage looks $800 cheaper while both are healthy.
After a hospitalization, the comparison could reverse.
Neither design is universally superior. The point is that an employee contribution cannot be evaluated without understanding what happens after someone actually uses the plan.
Payroll deductions measure the cost of having coverage. Deductibles and cost-sharing measure the price of needing it.
One Calculation Can Make Open Enrollment Much Clearer
If I were comparing employer plans, I would run the numbers in this order.
1. Calculate the annual employee premium.
Multiply each payroll deduction by the number of times it will actually be withheld.
A $175 biweekly deduction generally represents roughly $4,550 over 26 pay periods.
Do not accidentally multiply a biweekly deduction by 24 or a twice-monthly deduction by 26.
2. Subtract employer account contributions where appropriate.
If the employer deposits $1,200 into an HSA or HRA under one plan and nothing under another, that contribution can materially change the comparison.
It does not literally reduce your premium, but it can reduce the healthcare expenses you need to finance personally, subject to the rules of the account.
3. Add predictable healthcare costs.
Include known prescriptions, recurring therapy, specialist visits, planned procedures, and other care you reasonably expect.
You do not have to forecast every cold or injury.
Start with what is already visible.
4. Stress-test a high-cost year.
Find each plan's applicable in-network out-of-pocket maximum.
Then consider:
annual employee premiums + maximum qualifying cost-sharing
This is not a perfect worst-case number because premiums, noncovered services, and some out-of-network expenses can fall outside the out-of-pocket maximum.
But it reveals how much financial risk differs between the plans.
5. Check whether the household could handle the timing.
A $4,000 deductible is not merely a yearly number.
Could you pay $4,000 if the medical event happened in February?
That question often tells me more about whether a high-deductible option is workable than an annual spreadsheet does.
Your Premium May Get Favorable Tax Treatment
Another reason payroll deductions do not always equal their after-tax financial impact is that many employers allow employee health insurance premiums to be paid on a pre-tax basis.
When premiums are paid through an eligible employer salary-reduction arrangement, the money may be excluded from taxable income under applicable federal rules.
The IRS notes in its guidance on employer-sponsored premium treatment that premiums paid through certain pre-tax salary reductions are not treated the same as medical expenses paid with ordinary after-tax income.
The exact tax impact depends on the arrangement and your circumstances, so I would not translate a $5,000 payroll contribution into a universal tax-savings number.
But it is another reason to distinguish:
gross premium contribution from effective after-tax cost.
This also means employees should be careful when comparing a job-based premium with a private insurance premium paid in another way. The sticker prices may not have identical tax treatment.
“Affordable” Has a Technical Meaning Under the ACA
Employees sometimes look at a large family premium and reasonably conclude that the employer's coverage is unaffordable.
Federal Marketplace rules use a more specific definition.
For plan years beginning in 2026, job-based coverage is generally considered affordable for the employee if the required premium for the employer's lowest-cost self-only plan that meets minimum-value requirements does not exceed 9.96% of household income.
The rules for family members use the cost of covering the household when determining whether employer coverage is affordable to them. HealthCare.gov's current explanation of 2026 job-based affordability is important because an employee and family members can sometimes have different eligibility for Marketplace financial assistance.
That creates situations that surprise people.
An employee's self-only coverage might satisfy the affordability standard while adding a spouse and children becomes extremely expensive. Depending on household circumstances and the cost of family coverage, family members may potentially qualify for Marketplace savings even when the employee does not.
I would not assume that an employer offer automatically makes everyone in the household ineligible for Marketplace assistance.
Run the actual affordability test.
Your Summary of Benefits and Coverage Is More Useful Than the Enrollment Brochure
Employers often present plans through polished comparison charts showing premiums, deductibles, and a few popular copays.
I would also pull the Summary of Benefits and Coverage, or SBC.
Federal rules require group health plans and insurers to provide a standardized SBC that summarizes features such as deductibles, cost-sharing, exclusions, network information, and illustrative medical scenarios. CMS's current guide to the Summary of Benefits and Coverage explains that plans must use the standardized format specifically to make comparisons easier.
I like the SBC because it forces plans into a more consistent structure.
Check:
Deductible: Does it apply to nearly everything or only certain services?
Hospital care: Copay or coinsurance?
Specialists: Covered before or after the deductible?
Prescriptions: Separate deductible? Tiered copays? Coinsurance?
Out-of-pocket maximum: Individual and family?
Network: What happens outside it?
Coverage examples: How do the plans behave under the standardized scenarios?
Then use the full plan documents when an important detail is not clear from the summary.
The Employer Contribution Can Disappear When the Job Does
Nothing reveals the true cost of employer insurance quite like a COBRA notice.
While employed, someone may pay $570 per month for family coverage and think of that as the plan's price.
Then employment ends.
Under COBRA, qualifying individuals can generally be required to pay as much as 102% of the total plan cost, which includes both the share previously paid by the employee and the portion previously paid by the employer. Department of Labor guidance on COBRA premium costs explains this structure.
Using the 2025 average family premium of $26,993 purely as an illustration, the underlying monthly premium is about $2,249.
An employee contributing $571 each month while working is benefiting from roughly $1,678 per month of employer premium support on average.
If the worker later had to shoulder nearly the entire premium under COBRA, the monthly cost could suddenly become several times larger.
That does not mean COBRA is always a poor option.
It can be extremely valuable when continuity matters, particularly if someone is in active treatment, has already accumulated substantial deductible spending, or needs to keep an established provider network.
But I would compare it promptly with:
- A spouse's employer plan
- A new employer plan
- Marketplace coverage
- Medicaid or CHIP when potentially eligible
- Other qualifying coverage
Losing employer insurance can create special enrollment opportunities.
The employer contribution is easiest to overlook while you have it and easiest to appreciate the moment it disappears.
High-Deductible Plans Need Their Own Math
Employer-sponsored high-deductible health plans can lower the employee's premium contribution, but the deductible is only half the comparison.
Look for HSA funding.
In KFF's 2025 data, workers enrolled in HSA-qualified HDHPs paid an average of $1,319 toward single premiums and $5,634 toward family premiums, both below the overall averages.
But employers may also deposit money into employees' HSAs.
That employer contribution can offset part of the additional medical cost exposure.
Suppose:
Traditional plan
- Employee premium: $4,800 annually
- Deductible: $1,500
- No employer account contribution
HSA plan
- Employee premium: $2,900
- Deductible: $3,500
- Employer deposits $1,200 into HSA
The HSA plan starts with $1,900 less in employee premiums plus $1,200 of employer-provided HSA funds.
That creates a $3,100 difference before healthcare use is considered.
Now examine coinsurance, prescription costs, network, and out-of-pocket maximum.
A deductible comparison by itself would miss much of the value.
Employer Coverage Should Be Valued as Part of Compensation
There is another way to think about the “real” cost that does not appear on a medical bill.
Employer-paid health insurance is compensation.
If the total family premium averages almost $27,000 and the employee contributes about $6,850, the employer is financing roughly $20,000 of that premium on average.
That does not mean the employee could necessarily negotiate $20,000 in additional salary by declining insurance. Compensation systems do not work that mechanically.
It does mean that two job offers with identical salaries may not provide equivalent compensation if their health benefits are dramatically different.
When comparing jobs, I would ask for:
- Employee premium contributions
- Family premium contributions
- Employer HSA or HRA funding
- Deductibles
- Out-of-pocket maximums
- Network
- Prescription benefits
- Dental and vision contributions
- Eligibility waiting period
A job paying $5,000 more annually can lose much of that advantage if family health insurance costs $7,000 more and provides weaker coverage.
The Quote Check!
Before deciding what an employer health plan really costs, I would make these five checks:
- Check the annual payroll deduction: Convert the per-paycheck amount into a full-year figure for employee-only, spouse, and family coverage.
- Check what the employer adds: Premium contributions and HSA or HRA funding can represent thousands of dollars of benefits that never appear as wages.
- Check the cost of using the plan: Deductibles, copays, coinsurance, prescriptions, and the out-of-pocket maximum belong beside the premium.
- Check the household arrangement: Compare separate employer plans, dependent coverage, spousal surcharges, and possible Marketplace eligibility rather than assuming everyone belongs on one policy.
- Check the cost after employment ends: Knowing the full unsubsidized premium makes COBRA and future job transitions far less surprising.
The Paycheck Deduction Is Only the Opening Number
Employer-sponsored health insurance can be an extremely valuable benefit precisely because employees often do not pay its full cost.
The latest national data show an average worker contribution of about $1,440 for single coverage and $6,850 for family coverage, while employers pay the majority of the premium. But those averages tell only part of the story.
The employee's real healthcare budget also includes deductibles, prescription costs, copays, coinsurance, potential out-of-network expenses, and the financial cushion needed when an expensive claim arrives.
I would therefore judge an employer health plan in two ways: what it costs during an ordinary paycheck and what it could cost during an unusually difficult healthcare year.
The first number tells you what the benefit feels like while you are working. The second tells you what the coverage is actually asking you to risk.
Griffin Cross