Group health insurance is coverage offered by a business or organization to its employees (and often their dependents). These plans operate differently from Individual & Family Plans and Medicare, with unique rules for eligibility, employer contributions, underwriting, and plan structure. This section explains how group coverage works in California and what employers need to know before offering benefits.
What Is a Group Health Plan?
A group health plan is a health insurance policy purchased by an employer to cover employees and, in many cases, their families. Employers typically share the cost of premiums with employees, and coverage is guaranteed-issue — meaning employees cannot be denied based on health conditions.
Group health coverage is used by:
- Small businesses
- Large companies
- Nonprofits
- Unions and trade groups
- Public agencies
It is often one of the most valued employee benefits because it provides lower premiums and broader networks compared to many individual plans.
Types of Group Health Plans (Small vs Large Group)
In California, group plans fall into two categories:
Small Group (1–100 employees)
- All plans must follow Affordable Care Act (ACA) rules
- Standardized benefits similar to the individual marketplace
- Only age rating allowed (no health questionnaires)
- Metal tiers: Bronze, Silver, Gold, Platinum
- Pediatric dental/vision included
Large Group (101+ employees)
- Benefits are not standardized by metal tier
- Employers can choose from many plan designs
- Pricing is based on claims history and negotiations
- More flexible options for benefits and networks
Small group plans are very structured, while large group plans have more customization and purchasing power.
How Group Health Plan Costs Work
Employers and employees share the cost of the monthly premium. The employer’s contribution rules depend on group size and carrier guidelines.
Employer Contribution Requirements (Small Group)
In most cases:
- Employers must pay at least 50% of the employee-only premium
- Employers are not required to cover dependents, but many choose to
- Employees pay the difference through payroll deductions
Large Group Contribution Rules
Flexible, depending on the company and negotiations.
Many employers contribute:
- 70–100% of employee-only premiums
- 20–75% of dependent premiums
Employees may pay:
- Part of the premium
- Deductibles
- Copays
- Coinsurance
- Out-of-pocket maximums
Group plans typically offer lower premiums than individual plans for equivalent benefits.
Understanding Group Networks: HMO, PPO, EPO
Group plans often have stronger and larger networks than individual plans.
HMO (Health Maintenance Organization)
- Must see in-network providers
- Requires referrals for specialists
- No out-of-network coverage except emergencies
- Lowest premiums
- Common in California through Kaiser, Sharp, Sutter, Health Net, Blue Shield, and Anthem
PPO (Preferred Provider Organization)
- Freedom to see any provider
- Out-of-network allowed but at much higher costs
- No referrals required
- Higher premiums
- Popular with employers who want maximum flexibility
EPO (Exclusive Provider Organization)
- No out-of-network coverage except emergencies
- No referrals required
- Mid-level premiums
- Growing in popularity as a cost control option
Employers can offer multiple plan types side by side so employees can choose what works best for their needs.
Group Underwriting: How Employers Qualify
Unlike individual plans, group health insurance does not use medical underwriting. Instead, eligibility depends on business criteria.
Eligibility for Small Groups
A small group must:
- Be a legitimate business with at least one eligible W-2 employee
- Offer coverage to all full-time employees (30+ hours/week)
- Maintain required employer contributions (typically 50%)
- Meet participation rules (often 70% of eligible employees must enroll, unless waiving for other coverage)
Large Group Underwriting
Large group plans use:
- Claims experience
- Demographics
- Group size
- Industry classification
This allows large businesses to negotiate pricing.
Enrollment Windows for Group Plans
Group health plans have different enrollment rules than individual plans.
Initial Enrollment Period (when a plan is first offered)
All eligible employees can enroll.
Annual Open Enrollment: Occurs once a year.
Employees can:
- Enroll
- Drop coverage
- Change plans
Special Enrollment Events
Employees can join outside open enrollment if they have a qualifying event:
- Loss of other coverage
- Marriage
- Birth or adoption
- Change in household status
- Moving into the plan’s service area
Employers may also allow new employees to enroll after their waiting period ends (often 30–60 days).
Key Differences Between Group Plans and Individual Plans
Underwriting
Group Plans: Based on the employer, not the health of employees.
Individual & Family Plans: No health underwriting; eligibility and costs are tied to household income.
Premiums
Group Plans: Often lower because the cost is shared and risk is pooled.
Individual & Family Plans: Often higher for similar coverage.
Networks
Group Plans: Typically have larger, stronger provider networks.
Individual & Family Plans: Networks are often more limited.
Employer Role
Group Plans: Employers share the cost of premiums and manage enrollment.
Individual & Family Plans: There is no employer contribution; members pay the full premium.
Enrollment Rules
Group Plans: Employers can start a plan anytime; employees enroll during new hire periods or annual open enrollment.
Individual & Family Plans: Strict enrollment windows — Open Enrollment or Special Enrollment Period only.
Benefits
Group Plans: Often richer, with more flexibility and customization options.
Individual & Family Plans: Benefits are standardized under ACA rules, especially for small group and individual markets.
Ancillary Benefits Employers Commonly Add
To build more attractive benefits, employers often add:
- Dental insurance (HMO, PPO, or DHMO)
- Vision insurance
- Life insurance
- Short-term and long-term disability
- Employee Assistance Programs (EAPs)
- FSA, HSA, and HRA accounts
Many carriers bundle these for lower overall costs.
Choosing the Right Group Plan for Your Business
When selecting plans, employers should consider:
- Budget for employer contributions
- Whether PPO flexibility is important for workers
- The average age and needs of the workforce
- The company’s location and carrier network strength
- Whether employees prefer low premiums or low deductibles
- Whether offering multiple plan choices is valuable
A well-designed benefits package can improve employee satisfaction, reduce turnover, and help attract better talent.
Key Questions Employers Should Ask
- What can we realistically budget for monthly premiums?
- Should we offer one plan or multiple plan options?
- Do we want HMO-only options or include PPOs?
- Should we contribute toward dependents' premiums?
- How many employees are eligible and likely to enroll?
- Do we want to add dental, vision, or other benefits?
- Does the workforce prefer lower premiums or richer benefits?
Answering these helps build a package tailored to the specific needs of your business and your employees.