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 avoids fines and builds a benefits package that 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 9.96% of their household income for plan years beginning in 2026 (that percentage gets adjusted annually). Employers can use safe harbors, including 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 the IRS can assess employer shared responsibility payments, often called the Pay or Play penalties. For 2026, failing to offer coverage to at least 95% of full-time employees costs $3,340 per full-time employee, minus the first 30. Offering coverage that is unaffordable or below minimum value, and that sends even one full-time employee to the Marketplace for a premium tax credit, costs $5,010 per affected employee.
ACA Reporting: Forms 1094-C and 1095-C
Becoming an ALE also makes you an annual reporter. ALEs must file Form 1095-C, Employer-Provided Health Insurance Offer and Coverage, for each full-time employee, along with a Form 1094-C transmittal, with the IRS every year. Paper returns are due February 28 and electronic returns March 31, and each employee gets a copy of their 1095-C. Employers under 50 full-time employees skip the offer reporting unless they sponsor a self-insured plan, in which case they still report covered individuals under Section 6055. Missing or late forms carry their own reporting penalties, separate from the mandate penalties.
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 once a plan reaches 100 participants. 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 and Addiction Equity Act (MHPAEA) 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, from infertility and autism therapy to telehealth.
- State Reporting and Payroll Taxes: California, Massachusetts, New Jersey, Rhode Island, plus the District of Columbia and Vermont, have their own individual mandates and reporting rules. San Francisco's Health Care Security Ordinance goes further, requiring employers with 20 or more workers to spend a minimum amount on health care for employees who work at least 8 hours a week.
- Small Group Market Rules: States regulate the fully-insured small group market (usually 1-50 employees, though a few states extend it to 100), which affects plan design and pricing.
Strategic Compliance Beyond the Basics
Smart employers see compliance as the foundation for better benefits. For example, a platform that rewards verified preventive care must still 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. Employees earn spendable store dollars for each verified preventive action, while savings the employer commits fund 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 is to partner with expert advisors and use solid systems to stay compliant and turn benefits into a powerful tool for growth.