When employers must offer health insurance under the ACA

Executive overview

The Affordable Care Act mandates health insurance only for employers above a specific size threshold. Employers with 50 or more full-time equivalent employees are classified as Applicable Large Employers and must offer minimum essential coverage. Smaller employers are exempt, but still bound by ACA rules if they choose to offer coverage.

If your FTE count hits 50, the employer mandate applies and non-compliance carries significant financial penalties.

Calculating full-time equivalent (FTE) status

• A full-time employee works 30+ hours per week or 130+ hours per month
• For part-time staff: total monthly hours worked ÷ 120 = FTE count
• Add full-time headcount and part-time FTEs, then divide the annual total by 12
• Result below 50: not an ALE; result of 50 or above: ALE status applies
• Example: 36 full-time + 1,700 monthly part-time hours ÷ 120 = 14 FTEs → total 50 → ALE

Employer mandate requirements

• ALEs must offer affordable minimum essential coverage (MEC) to employees and dependents up to age 26
• Coverage must be offered to at least 95% of full-time employees and their dependents
• Spousal coverage is not required

Penalties for non-compliance (2024)

• No coverage offered: $2,970 × (total FTEs − 30)
• Coverage offered but not affordable or not MEC: $4,460 × FTEs receiving a marketplace premium tax credit
• Penalty amounts increase annually
• No penalty if employees decline coverage — but open enrollment notice requirements must be met