ACA Employer Penalties and Compliance: What Employers Need to Know for 2026
ACA enforcement is no longer theoretical. For Applicable Large Employers, penalties are actively assessed years after coverage decisions are made, often triggered by reporting errors, affordability miscalculations, or eligibility tracking failures rather than intent.
As employers prepare 2025 filings in 2026, several updates materially affect compliance risk.
Who Must Comply With the ACA Employer Mandate
Applicable Large Employers are organizations that averaged 50 or more full-time employees, including full-time equivalents, during the prior calendar year.
A full-time employee is generally defined as one who averages at least 30 hours of service per week or 130 hours per month. Full-time equivalents are calculated separately based on aggregate hours worked by part-time staff.
ALE status is determined annually and applies to the entire following year. Employers that cross the threshold unintentionally often discover their exposure after penalties are assessed.
What ACA-Compliant Coverage Actually Requires
Under the Employer Shared Responsibility provisions, ALEs must offer health coverage to at least 95 percent of full-time employees and their dependents.
To avoid penalties, that coverage must meet three distinct requirements:
- Minimum Essential Coverage
- Minimum Value
- Affordability
Minimum Essential Coverage establishes that an offer of coverage exists. Minimum Value and affordability determine whether that coverage is sufficient under the law.
These standards are evaluated independently and failure in any one area can result in penalties.
2025 and 2026 ACA Penalty Updates
Employer Shared Responsibility Penalties for the 2025 Tax Year
Filed in 2026
4980H(a) Penalty
Applies when an ALE fails to offer Minimum Essential Coverage to at least 95 percent of full-time employees and their dependents.
Estimated at approximately $2,900 per full-time employee, excluding the first 30 employees.
4980H(b) Penalty
Applies when coverage is offered but is unaffordable or does not meet Minimum Value and at least one full-time employee receives a Premium Tax Credit through an exchange.
Estimated at approximately $4,350 per impacted employee.
Penalty amounts are indexed annually and assessed retroactively based on reported data.
Affordability Thresholds That Matter in Practice
2025 Affordability Percentage
The affordability threshold for the 2025 plan year is 9.02 percent. This represents a decrease from 2024 and requires employers to ensure employee premium contributions stay below this level based on allowed safe harbors.
2026 Affordability Projection
The 2026 affordability threshold is projected to rise to 9.96 percent, offering more flexibility in premium setting. Employers should treat this as provisional until finalized guidance is issued.
Affordability miscalculations remain one of the most common triggers for 4980H(b) penalties.
Reporting Deadlines for 2026
Forms 1095-C and 1094-C
Employee furnishing deadline
March 2, 2026
IRS filing deadlines
February 28, 2026 for paper filings
March 31, 2026 for electronic filings
The March 2 furnishing deadline is now permanent and no longer requires an annual extension.
Alternative Furnishing Method
Employers may continue to use the alternative furnishing method, which allows them to post a clear notice on their website explaining how employees can request a copy of Form 1095-C instead of automatically distributing forms.
This option reduces administrative burden but does not reduce filing accuracy requirements.
Electronic Filing Requirement
Employers filing 10 or more information returns, including Forms 1095-C, must file electronically.
This threshold applies across all information returns combined, not just ACA forms.
Premium Tax Credit Changes and 2026 Planning Risk
Enhanced Premium Tax Credits are scheduled to expire on December 31, 2025.
If these subsidies lapse, employees may face higher exchange premiums in 2026, increasing demand for employer-sponsored coverage and increasing scrutiny of affordability and eligibility decisions.
Employers relying on minimal offers or affordability margins should reassess exposure now.
Common Reasons Employers Get Penalized Today
Most penalties are not caused by a deliberate failure to offer coverage. They stem from operational breakdowns such as:
Eligibility tracking errors
Late or missed offers of coverage
Affordability safe harbor miscalculations
Inconsistent payroll and HRIS data
Incorrect or incomplete Forms 1094-C and 1095-C
Even employers that offered coverage in good faith can be penalized if reported data does not align with actual employee experience.
Action Steps for Employers Heading Into 2026
- Confirm 2025 affordability calculations use the 9.02 percent threshold
- Monitor final guidance for the 2026 affordability percentage
- Ensure eligibility tracking and offer timing align with measurement periods
- Prepare for mandatory electronic filing by March 31, 2026
- Review reporting accuracy before IRS notices arrive
ACA penalties are assessed years after decisions are made, but the outcomes are determined long before reporting season.
Proactive compliance is no longer optional.
