There's no single federal law that requires all employers to offer health insurance. But a mix of federal and state rules creates serious obligations for many companies—especially as they grow. Getting these right isn't just about avoiding fines; it's about building a benefits package that actually helps you keep good people.
The Big One: The ACA Employer Mandate
The most significant federal rule is the Affordable Care Act's employer mandate. It applies if you're an Applicable Large Employer (ALE)—meaning 50 or more full-time equivalents in the prior year. If you are, the law hands you two key requirements:
- Offer Minimum Essential Coverage (MEC) to at least 95% of your full-time employees (and their dependents up to age 26).
- Make sure that coverage is both affordable and provides minimum value.
For affordability: the employee's share of the premium for the cheapest self-only plan can't exceed 8.39% of their household income in 2024 (that percentage gets adjusted annually). Employers can use safe harbors—W-2 wages, rate of pay, or the federal poverty line—to simplify the math. For minimum value: the plan must cover at least 60% of total allowed costs and include substantial coverage for physician and inpatient hospital services.
Miss these requirements, and you could face serious penalties—the so-called "Pay or Play" penalties—if even one full-time employee gets a premium tax credit through the Health Insurance Marketplace.
Other Federal Laws That Apply Once You Offer Coverage
If you do offer health benefits, your plan immediately falls under several federal laws. ERISA governs plan administration, requiring a formal plan document, summary plan description (SPD), and annual Form 5500 filings for larger plans. HIPAA protects employees' health information and prohibits discrimination based on health status. COBRA gives people who lose coverage the right to continue it temporarily (at their own expense) if you have 20 or more employees. The Mental Health Parity Act ensures that mental health and substance use disorder benefits are treated no worse than medical/surgical ones. And the ADA and GINA ban discrimination based on disability or genetic information.
State and Local Requirements
Beyond federal law, states are increasingly active, so you need to know about:
- State Mandated Benefits: Laws that require coverage for specific treatments—infertility, autism therapy, telehealth, you name it.
- State Reporting & Payroll Taxes: Some states (Massachusetts, New Jersey, California, Rhode Island) have their own individual mandates and reporting rules. New York City even has its own paid sick leave law that touches health benefits.
- Small Group Market Rules: States regulate the fully-insured small group market (usually 1–50 employees), which affects plan design and pricing.
Strategic Compliance Beyond the Basics
Smart employers see compliance as the foundation for innovative benefits. For example, a platform that incentivizes preventive care with contributions to retirement accounts must comply with ERISA, HIPAA, and IRS codes. Designed to work within existing employer-sponsored ACA-compliant group health coverage, WellthCare operates as a self-insured supplemental plan under IRC Section 105, with all compliance recordkeeping automated. It rewards each verified preventive action with spendable store dollars and automatic retirement contributions. The best companies use integrated technology to automate compliance, track qualifying activity, and structure incentives within legal guardrails. This turns complexity into a real competitive advantage.
So no, you don't have to offer health benefits—unless you have 50 or more full-time equivalents, in which case the ACA says you do. Once you offer any plan, a whole stack of federal and state laws binds it. The smart play: partner with expert advisors and use solid systems to stay compliant and turn benefits into a powerful tool for growth.