ACA Employer Mandate: What California Businesses Need to Know
The Affordable Care Act's employer shared responsibility provision (commonly called the "employer mandate") requires Applicable Large Employers (ALEs) — businesses with 50 or more full-time equivalent employees — to offer affordable, minimum value health coverage to full-time employees and their dependents, or pay a penalty. This provision has been in effect since 2015 and the IRS actively enforces it through Letter 226J penalty assessments.
FTE calculation: full-time employees (30+ hours/week average) plus part-time FTE equivalents (total monthly part-time hours ÷ 120). Count all employees under common ownership for affiliated service groups. A business with 30 full-time and 40 part-time employees working 20 hours/week: 30 + (40 × 20/120) = 36.67 FTE — not an ALE. But add a sister LLC with 15 more employees and you might cross 50.
Penalty A vs. Penalty B
Penalty A (employer offers no coverage to full-time employees): $2,970/year per full-time employee, minus first 30 employees. A 60-person ALE that offers no coverage: (60-30) × $2,970 = $89,100/year. Penalty B (employer offers coverage that's not affordable or minimum value): $4,460/year per full-time employee who receives a subsidized plan through Covered California. Penalty B is assessed per employee who gets a subsidy, not all employees.
Affordability Safe Harbors
Coverage is affordable if the employee's required contribution for self-only coverage doesn't exceed 9.12% of household income (2024). Since employers don't know household income, three safe harbors are available: W-2 safe harbor (9.12% of Box 1 wages), Rate of Pay safe harbor (9.12% of hourly rate × 130 hours), or Federal Poverty Level safe harbor (9.12% of the federal poverty level for a single individual). The FPL safe harbor is simplest but may require very low employee contributions.
IRS Reporting Requirements
ALEs must file Form 1094-C (transmittal) and provide employees with Form 1095-C (individual statement of coverage) by March 1 each year (for the prior calendar year). Electronic filing with the IRS is required for ALEs filing 10+ returns (as of 2024). 1095-C must show the offer of coverage, the employee's share of the lowest-cost self-only monthly premium, and enrollment information for each month. Non-compliance penalties: up to $310/return for late filing.