It depends on your state, your carrier, and how your business is structured. A sole proprietor with no staff faces different rules than a 10-person company or a 60-employee operation crossing into large-group territory.
This guide breaks down the minimum thresholds, who counts as an eligible employee, participation rules insurers enforce, and what to do if your business doesn't qualify yet.
Key Takeaways
- Most states cap small group coverage at 1–50 FTEs
- At least one non-owner, non-spouse employee must enroll to qualify
- Carriers typically require about 70% participation from eligible employees
- Businesses averaging 50+ FTEs move under large-group rules and extra compliance duties
- ICHRA and QSEHRA offer alternatives with no employee minimums
What Is the Minimum Number of Employees Needed for Group Health Insurance?
Under federal rules, small-group coverage can start at 1 full-time equivalent employee and runs through 50 FTEs, per HealthCare.gov's SHOP eligibility guidance. Most states use that 1-50 range as the baseline for small-group markets.
States don't all follow the federal number exactly. Colorado currently allows small-group coverage up to 99 employees, though Senate Bill 24-073 shifts this back to 1-50 starting January 1, 2026. New York and Vermont have historically permitted small-group plans up to 100 employees.
Check your state's current rule before shopping, since these definitions shift over time.
What If You're a Sole Proprietor?
A business owner with no other staff generally cannot purchase group coverage. Insurers require at least one enrolled employee who isn't the owner or the owner's spouse. Solo business owners typically use individual marketplace plans or an ICHRA instead.
How Do You Calculate FTEs?
The IRS uses a two-part formula:
- Count employees averaging 30+ hours per week (or 130+ hours per month) as full-time
- For everyone else, add up their monthly hours (capping each person at 120 hours) and divide by 120 to get your part-time FTE contribution
Add these two numbers together for your total FTE count, per the IRS's employer shared responsibility guidance. Get this number wrong, and you could end up shopping for the wrong market entirely.
Virginia and West Virginia employers working through this calculation for the first time often benefit from a second set of eyes. Muneris Benefits' account managers walk through the FTE math with employers before they start comparing plans, so there's no guesswork on eligibility.
Who Counts as an Eligible Employee for Group Coverage?
Not every person on your payroll counts toward your group insurance eligibility. This matters because it determines whether you qualify at all.
Employees Who Qualify a Business for Group Insurance
To meet the "at least one eligible employee" rule, the following people do not count:
- The business owner
- A spouse of the owner
- A family member employed by the owner
- A business partner
Seasonal workers, temporary staff, and most independent contractors typically don't count toward your employee threshold either.
How do you know if someone is truly an employee versus a contractor? The IRS applies a common-law test that looks at three factors, per IRS guidance on employee classification:
- Behavioral control: Does the business direct how the work gets done?
- Financial control: Who covers expenses, and how is the worker paid?
- Relationship type: Are there written contracts, benefits, or an ongoing working relationship?
A contractor label alone won't settle this. If someone functions like an employee under this test, they may count as one regardless of what their paperwork says.
Special Cases: Sole Proprietors and Owner-Only Businesses
A business consisting of just the owner, or the owner plus a spouse, doesn't meet group insurance eligibility. These businesses generally need individual health plans or an ICHRA arrangement instead.
Participation and Enrollment Requirements Insurers Impose
Even if you have the right FTE count and an eligible employee, carriers still require a minimum share of your eligible workforce to enroll. This is called a participation requirement.
Insurers need a balanced risk pool. Without a participation minimum, only employees with health concerns might sign up, driving costs up for everyone. Carriers use these floors to limit adverse selection, a dynamic described in a NAIC paper on adverse selection in health exchanges.
A few things to know about how participation gets calculated:
- Requirements commonly fall between 50% and 75%, though this varies significantly by carrier and state
- Employees already covered elsewhere (a spouse's plan, an individual policy) generally don't count against you in this calculation
- Valid waivers and proof of other coverage still have to meet your carrier’s rules to stay out of the denominator
There's one notable exception. Federal rules under 45 CFR 147.104 allow the participation requirement to be waived during the annual open enrollment window, typically mid-November through mid-December. This gives businesses that fall short during the rest of the year a shot at enrolling anyway.
Because percentages and waiver rules differ by state and carrier, confirm the exact participation threshold with a licensed broker before you commit to a plan.
Small Group vs. Large Group: What Changes at 50 Employees
Fifty full-time employees (including full-time equivalents) is the ACA line that turns you into an Applicable Large Employer. Crossing it changes your compliance duties, and it sits right next to the small-group vs. large-group market split.
| Factor | Under 50 FTEs | 50+ FTEs (ALE) |
|---|---|---|
| Coverage mandate | No federal offer requirement | Must offer coverage to 95% of full-time staff |
| Reporting | Minimal | IRS Forms 1094-C and 1095-C required |
| Premium negotiation | Limited leverage | More bargaining power |
| Underwriting | Community rated (small-group market, typically 1–50) | Often experience rated (large-group market, typically 51+) |
Businesses that average 50 or more full-time employees (including full-time equivalents) become Applicable Large Employers (ALEs) under the ACA. That triggers the employer mandate: offer coverage to at least 95% of full-time staff or face penalties, according to IRS guidance on employer shared responsibility.
ALEs also take on annual reporting duties. Every full-time employee needs a Form 1095-C, and the employer files a summary Form 1094-C. Muneris Benefits' HR consulting services include ACA compliance support, which helps employers manage this transition without missing a filing deadline.
Headcount triggers do not stop at 50. Another threshold catches many growing employers earlier.
The Medicare 20-Employee Rule
If you have 20 or more employees, you must offer active employees aged 65 and older the same group health plan you offer younger workers. Under CMS's Medicare Secondary Payer rules, the group plan pays first and Medicare pays second. Employers under 20 employees see the opposite: Medicare pays first.
Who Pays for Group Health Insurance Premiums?
Group plans differ from individual coverage in one major way: costs get shared. On an individual plan, you pay the full premium yourself. With group coverage, your employer typically covers a portion.
A few key points on how this works:
- Employer and employee contributions are negotiable, but many employers pay 50–80% of the employee-only premium
- Employee contributions are often deducted pre-tax through payroll under a Section 125 cafeteria plan, which reduces taxable income for both parties
- Exact contribution splits vary widely by employer size, industry, and budget
There's no universal formula for the right split. What works for a 15-person retail shop won't necessarily work for a 40-person manufacturing team. A licensed benefits advisor can help you structure contributions for competitiveness and compliance.
What If Your Business Doesn't Qualify for Group Health Insurance?
Not meeting the group minimum doesn't mean you're out of benefits options. Two alternatives fill this gap:
- QSEHRA (Qualified Small Employer HRA) - for businesses under 50 employees that don't offer a traditional group plan
- ICHRA (Individual Coverage HRA) - for businesses of any size, with no minimum employee count or participation percentage required
Both let employers reimburse employees for individual health coverage instead of sponsoring a traditional group plan. Neither imposes the enrollment thresholds or participation requirements that group plans require, according to HealthCare.gov's ICHRA overview.
If your business is too small for group coverage today, or you want more budget flexibility, compare these HRA options against a traditional group plan. Muneris Benefits works with Virginia and West Virginia employers to weigh both paths and find which one fits the workforce and budget.
Frequently Asked Questions
What is the minimum number of employees for group health insurance?
Most states define small-group coverage as 1–50 full-time equivalent employees. At least one enrolled employee must be a non-owner, non-spouse worker.
Who pays the premium in a group health plan?
Costs are typically shared between employer and employee, with the employer usually covering a meaningful portion. Employee contributions are often deducted pre-tax through payroll.
Who is eligible for group insurance?
Eligible employees generally work full-time hours and pass the IRS common-law employment test. Owners and family members may enroll on some plans, but most independent contractors do not qualify.
Why do insurers require a minimum number of employees participating in group insurance?
Minimum participation prevents adverse selection, where only high-risk employees enroll. This keeps the risk pool balanced and premiums manageable for everyone.
What is considered a group health plan?
A group health plan is employer-sponsored coverage that provides health benefits to current or former employees and their families through the employer relationship.
What is the 20-employee rule for Medicare?
Employers with 20 or more employees must offer active employees aged 65+ the same group health plan as younger workers. The group plan then pays first, with Medicare paying second.
