Large Group Health Insurance: Definition, Rules, and Plans
Large group health insurance is employer-sponsored coverage for a company with 51 or more employees in most states. A few states, including California, New York, and Vermont, set the line at 101 or more. The employer either buys a policy from an insurer or pays employee claims directly. Either way, the price reflects the group's size and claims history, not any one person's health. Large group plans also carry fewer mandated benefit rules than small group plans.
This article goes beyond the definition. You will see why this coverage matters, how to count your employees, how large group differs from small group, which plan designs and funding methods exist, what the ACA requires, what it costs, and how to buy it. The figures come from federal rules and the most recent KFF employer survey, and we flag the places where state rules change the answer.
Golden Health and Life Agency is an insurance brokerage that provides and manages group health plans for businesses and works with over 300 carriers. We explain large group health insurance the way we explain it to employers who ask us for quotes: what the rules say, what the numbers look like, and where decisions get made.
Why large group health insurance matters
Large group health insurance matters because it is how most working Americans get coverage and the main benefit employers use to hire and keep people. KFF reports that 60% of people under 65, about 165.6 million, had employer-sponsored coverage in 2025. Among firms with 200 or more employees, 97% offer health benefits, and 69% of workers are employed by firms that size.
If you employ 51 or more people, health coverage stops being a perk and becomes a baseline expectation of your workforce and of federal law.
What it does for employers
Coverage is a recruiting and retention tool, and it is also one of the cheapest ways to deliver compensation. Employer premium contributions are generally deductible to the business and are not taxed as wages to the employee. KFF gives a clear example. An employee earning $100,000 would need roughly $27,460 in extra wages to buy a $20,000 family policy with after-tax dollars, assuming a 22% federal bracket and 15.3% payroll tax. The employer can deliver the same policy for $20,000.
Group coverage also pools risk. Insurers can enroll a whole workforce in one transaction, usually without individual health exams. A larger group makes claims more predictable, which is why large group health insurance plans can be priced and designed more flexibly than individual policies.
What it does for employees
For employees, the draw is that the employer pays most of the premium. The 2025 KFF averages show how much.
2025 average | Total annual premium | Worker pays | Worker share |
|---|---|---|---|
Single coverage | $9,325 | $1,440 | 16% |
Family coverage | $26,993 | $6,850 | 26% |
KFF calculates these shares at the firm level, so they do not divide exactly from the dollar figures. Enrollment is also simple. You choose a plan at hire or during open enrollment, and premiums come out of your paycheck before taxes.
Trade-offs to weigh
Large group coverage is not free of downsides. Costs keep rising, employees often face real deductibles, and coverage is tied to the job. Here is how the two sides compare.
Advantages: employer pays most of the premium, pre-tax payroll deductions, no individual medical underwriting for employees, broad network choices, and pricing that can improve with a healthy group.
Drawbacks: family premiums rose 26% over five years (inflation was 23.5%), 88% of covered workers face a deductible averaging $1,886 for single coverage, and losing the job usually means losing the plan.
Employer burden: compliance duties, annual renewals, enrollment administration, and exposure to one or two very large claims.
How to tell if your company is a large group
You are a large group if you have 51 or more full-time equivalent (FTE) employees in most states, and 101 or more in states that set the small group cap at 100. The count is not a simple headcount, and it differs from the state-by-state shortcuts you may have heard. Run the math before you ask for quotes.
Count FTEs, not people: 38 full-timers plus 30 half-time workers can put you over the 50-employee line.
Count your employees the way the rules do
Under the ACA, a full-time employee works 30 or more hours per week, or 130 hours per month. Part-time hours are converted into full-time equivalents by adding up each part-timer's monthly hours (capped at 120 per person) and dividing the total by 120. Carriers generally look at an average over the prior calendar year, so bring payroll records and ask which period applies to you.
Here is a worked example. You have 38 full-time employees and 30 part-timers who each work 20 hours a week, about 87 hours a month.
Part-time hours: 30 × 87 = 2,610 hours per month.
Part-time FTEs: 2,610 ÷ 120 = about 21.75.
Total: 38 + 21.75 = about 59 FTEs.
With 59 FTEs, you are a large group in most states even though only 38 people work full time.
Where the large group line sits by state
The federal baseline puts the small group market at 50 employees or fewer. States may raise the cap. Healthcare.gov also notes that some states define large groups as 101 or more.
Location | Small group | Large group |
|---|---|---|
Most states | Up to 50 employees | 51 or more |
California, New York, Vermont | Up to 100 employees | 101 or more |
Colorado | Moved to a 50-employee cap starting in 2026, with a transition for groups of 51 to 100 | 51 or more, subject to the transition |
One point causes confusion. The ACA employer mandate starts at 50 FTEs, but the large group market starts at 51 in most states. A 50-FTE employer owes the ACA offer of coverage yet still buys small group insurance.
Can individuals buy large group coverage?
No, individuals cannot buy large group health insurance on their own. You get it as an employee, a dependent, or a member of a union or association that sponsors a plan. If you are self-employed with no employees, you generally shop in the individual market or the ACA Marketplace instead. The same logic applies to searches for group insurance plans for individuals. The group has to exist first, and that means an employer relationship.
How large group differs from small group coverage
Large group plans differ from small group plans in how they are priced and designed. Small group follows ACA rating and benefit rules closely. Large group is priced on the group's own claims experience and has fewer mandated features. A few protections apply to both.
Small group is priced by formula, and large group is priced by your own track record.
Side-by-side comparison
Feature | Small group | Large group |
|---|---|---|
Size (most states) | Up to 50 employees | 51 or more |
Pricing basis | Age (max 3:1), family size, location, tobacco use | Group's claims history, demographics, and other underwriting factors |
Essential health benefits | Required for new plans | Not required as a package |
Metal levels (bronze to platinum) | Required | Not required |
Out-of-pocket maximum | Capped by federal limit | Capped by federal limit |
Adult children to age 26 | Required | Required |
Waiting period | 90 days maximum | 90 days maximum |
Employer mandate | No penalty for not offering | Penalty risk at 50+ FTEs |
Self-funding | Possible but uncommon | Common |
Both markets also bar waiting periods longer than 90 days and require non-grandfathered plans to cover preventive care without cost sharing.
How large group pricing works
A large group is usually underwritten when you buy and again at renewal. Insurers look at participation rates and prior medical claims. The more people in the group, the more weight the insurer gives your own history, because KFF notes that predictability rises as headcount grows. A healthy group with steady claims can earn better renewals. One catastrophic claim can push the next renewal up.
Where large groups get more freedom
Because the ACA benefit package and metal-level rules are looser here, you can tailor more. You can set contribution levels by employee class, offer several plan options, add wellness programs, and choose between insurance and self-funding. That flexibility is the practical reason many mid-sized employers prefer large group health insurance plans over staying in small group, where one is available.
Funding options and plan types for large groups
Two decisions shape a large group plan: how you fund it and how you design it. Funding is either fully insured or self-funded. Design means choosing among PPO, HMO, POS, EPO, and high-deductible plans with a savings account. Most employers mix choices from both decisions.
Funding decides who carries the claims risk, and plan design decides how employees experience the coverage.
Fully insured versus self-funded
In a fully insured plan, you pay a premium to a state-licensed insurer, which carries the claims risk. In a self-funded plan, you pay employee claims directly from company funds. Self-funded employers usually buy stop-loss coverage to cap exposure to unusually large claims. Self-funding is common at scale. KFF data cited by healthinsurance.org shows 80% of covered workers at employers with 200 or more employees were in self-insured plans in 2025.
Fully insured | Self-funded | |
|---|---|---|
Who pays claims | Insurer | Employer, with stop-loss as a backstop |
Cost pattern | Fixed premium | Varies with actual claims |
Regulation | State and federal insurance rules | Federal ERISA rules, generally exempt from state benefit mandates |
Fits best | Groups wanting predictability | Larger, financially stable groups with steady claims |
Some mid-sized employers consider level-funded health plans, which pair a fixed monthly payment with stop-loss protection. Ask your broker whether your size makes that practical.
Common plan designs
The designs differ mainly by network openness and referral rules. KFF reports PPOs as the most common type.
Plan type | Network | Referral needed for specialists? | Out-of-network coverage |
|---|---|---|---|
PPO | Open, broad | No | Yes, at higher cost sharing |
POS | Open | Yes, from a primary care provider | Yes, at higher cost sharing |
HMO | Closed | Typically yes | Only emergencies |
EPO | Closed | Usually no | Only emergencies |
HDHP with HSA or HRA | Can be any of the above | Depends on the underlying plan | Depends on the underlying plan |
HMOs covered 12% of workers in 2025, down from nearly 3 in 10 in the late 1990s. Nearly 3 in 10 covered workers are in high-deductible plans with a savings option, and almost a quarter are in HSA-qualified plans. Employers that pair an HSA-qualified plan with an account contribution averaged $690 for single coverage and $1,296 for family coverage in 2025.
Network strategies
Some employers go beyond the standard menu. In 2025, 9% of firms offering benefits had at least one narrow network plan, which limits participating providers to cut costs. Others use tiered networks, where employees pay less for providers ranked as higher quality or lower cost. Most employees prefer broad networks, so test any restrictive design against where your workforce actually lives and which doctors and hospitals they use.
ACA and legal rules large employers must follow
Employers with 50 or more FTEs must offer affordable, minimum-value coverage to their full-time employees or risk ACA penalties. Several other federal rules apply on top of that. Treat this section as a planning checklist, and confirm current dollar figures with your broker or tax adviser, because the IRS adjusts them every year.
Offering coverage is not enough under the ACA. It has to be affordable and cover at least 60% of expected costs.
The employer mandate in numbers
The mandate has two separate penalties, and the 2025 amounts show how they work.
Requirement | What triggers the penalty | 2025 amount |
|---|---|---|
Offer minimum essential coverage to at least 95% of full-time employees and their dependent children | At least one full-time employee gets a premium tax credit in the Marketplace | $2,900 per full-time employee, after the first 30 |
Offer coverage that is affordable and provides minimum value | An employee gets subsidized Marketplace coverage because your offer fails | $4,350 per employee who gets the subsidy |
Minimum value means the plan covers at least 60% of a typical population's health spending. In 2025, coverage counted as affordable if the employee's contribution for self-only coverage was no more than 9.02% of household income. Since 2023, the "family glitch" fix means affordability for family members is judged by the cost of family coverage.
Here is a worked example. An employer with 150 full-time employees drops coverage, and one employee gets a Marketplace subsidy. The first penalty would be (150 − 30) × $2,900 = $348,000 at 2025 rates.
Other rules that apply
These requirements round out your compliance picture.
Waiting period: new hires cannot wait more than 90 days for coverage to begin.
Dependents: plans that cover children must keep them eligible until age 26.
Out-of-pocket cap: in-network spending is capped at $10,600 for an individual and $21,200 for a family in 2026.
COBRA: departing employees and dependents can buy continued coverage, usually for 18 months and up to 36 in some circumstances. They pay the full cost.
Medicare and workers 65 or older: employers with 20 or more employees must offer current workers the same group plan benefits given to younger employees. Those workers may delay Medicare Part B without a penalty and enroll within 8 months after employment or group coverage ends.
ERISA: private employer plans fall under its disclosure and fair-dealing rules, while public and church plans generally do not.
ACA reporting: employers with 50 or more FTEs file annual IRS reports on the coverage they offer.
What large group health insurance costs
Large group health insurance averaged $9,325 per year for single coverage and $26,993 for family coverage in 2025, with employers paying most of the health insurance cost per employee. Your own number will differ, because group size, workforce age, region, and plan design all move it. Use the averages to set a budget range, then get real quotes.
Averages tell you the budget range. Your group's age, claims, and network decide the actual quote.
Large firms versus small firms
Large employers tend to ask employees to pay less. KFF's figures compare firms with 200 or more workers to firms with 10 to 199 workers.
2025 measure | Small firms (10-199) | Large firms (200+) |
|---|---|---|
Worker share of family premium | 36% | 23% |
Average single deductible | $2,631 | $1,670 |
Covered workers with a deductible of $2,000 or more | 53% | 28% |
Covered workers whose employer pays the entire single premium | 29% | 7% |
Notice the last row. Large employers are less likely to cover the whole single premium, but they cover more of the family premium.
A worked cost example
Say you enroll 90 employees in single coverage at the 2025 averages. Total premium is 90 × $9,325 = $839,250 a year. Employees contribute 90 × $1,440 = $129,600. Your share is the remaining $709,650, or about $657 per enrolled employee per month. Family enrollees would raise that total considerably, since average family premiums are nearly three times the single premium.
What moves the price
Several factors push a quote above or below average.
Workforce: age and health of covered employees.
Network: the prices charged by providers in your network, with premiums averaging higher in the Northeast.
Generosity: lower deductibles and richer benefits cost more.
Contribution strategy: how much of the premium you pay changes both your spend and participation.
Funding method: fully insured plans carry a risk charge, while self-funded plans trade that for variable claims.
When costs climb, employers typically adjust plan offerings, raise cost sharing, drop high-cost providers, or change how benefits are covered.
How to buy and set up a large group plan
To buy a large group plan, confirm your FTE count, set a budget and contribution strategy, gather your data, collect quotes through a broker, compare funding and networks, then enroll and administer. The work takes weeks, so start well before your renewal date. This process works for first-time buyers and for employers re-marketing an existing plan.
Start with your budget and your people, not the carrier brochure.
A step-by-step process
Confirm your size. Calculate FTEs and check your state's definition of a large group.
Decide what you can spend. Set a per-employee budget and the share you want to pay for single and family coverage.
Gather information. Collect an employee census (ages, ZIP codes, dependents), your current plan details, and, if you have them, claims reports.
Request quotes. Ask for both fully insured and self-funded proposals if you have 100 or more employees and stable finances.
Compare networks. Check that your employees' doctors and hospitals are in network.
Choose and enroll. Set the open enrollment window, communicate the options, and process payroll deductions.
Review yearly. Re-check affordability, participation, and claims before every renewal.
Questions to ask every carrier
These questions expose the differences between proposals that look similar.
What rate guarantee applies, and how are renewals calculated?
How do participation and employer contribution requirements affect pricing?
For self-funded options, what stop-loss levels are available and what is excluded?
How large is the network where our employees live, and how does it handle mental health access?
Which wellness or care management tools come with the plan?
Which insurers sell large group coverage
Many national carriers sell large group plans, including UnitedHealthcare, Aetna, Cigna, Anthem, and the Blue Cross Blue Shield companies. Which ones are active, and how strong their networks are, depends on your state and county. The biggest name is not automatically the best fit. A broker can compare carriers side by side. Golden Health and Life Agency does this across a network of over 300 carriers, and we handle ongoing management of group plans as well.
Next steps for your group
Large group health insurance is employer coverage for companies above the small group cap, which is 51 employees in most states and 101 in a few. It is priced on your group's own experience, offers more design freedom than small group, and comes with ACA duties once you reach 50 FTEs. Count your FTEs first, decide whether to fund through an insurer or self-fund, and budget with the averages above before you collect quotes or book a health consultation.
If you want a second set of eyes on your headcount, plan options, or renewal, contact Golden Health and Life Agency and tell us about your group.
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