The Affordable Care Act turned 16 this year, and the employer piece of the law has aged into a steady, compliance-heavy rhythm. If your business has 50 or more full-time equivalent employees, you're an Applicable Large Employer (ALE), and the ACA's employer shared-responsibility provisions apply to you. The IRS changes the affordability threshold every year, the forms get slightly tweaked, and the penalty amounts creep up with inflation. In 2026, the affordability percentage moved to 9.02% of household income, and the employer mandate penalties climbed again.
What the ACA Actually Requires of Employers The core employer rules sit in two places. First, ALEs must offer health coverage to at least 95% of full-time employees and their dependents. The coverage has to meet minimum value (pay at least 60% of total allowed costs) and be affordable (employee's share of self-only premium no more than 9.02% of household income in 2026). Second, ALEs file Forms 1094-C and 1095-C with the IRS every year to document who was offered coverage, what the offer looked like, and who took it.
Failure on the first requirement triggers the "A" penalty (about $2,900 per full-time employee, minus the first 30, annualized). Failure on affordability or minimum value triggers the "B" penalty (about $4,350 per employee who gets a subsidized exchange plan).
How to Determine Applicable Large Employer Status ALE status is measured on a calendar-year basis using the prior year's data. You count all full-time employees (30+ hours per week) and add in full-time equivalents from part-time workers. If the average across 12 months is 50 or more, you're an ALE for the following year.
What Counts as a Full-Time Employee Under the ACA? The ACA uses 30 hours per week or 130 hours per month as the full-time threshold, regardless of what you call the role internally. Salaried, hourly, and variable-hour workers all get measured the same way.
ACA Reporting: Forms 1094-C and 1095-C Form 1095-C goes to each full-time employee (and to any employee who enrolled in self-insured coverage). It shows the offer of coverage, the employee share of the lowest-cost self-only premium, and coverage status for each month. Form 1094-C is the transmittal that aggregates 1095-Cs and reports company-level information.
The IRS has moved to electronic filing thresholds that pull in almost every employer: if you file 10 or more information returns in total across all form types, you file electronically. Paper filing is rare in 2026. The IRS ACA Information Returns (AIR) program runs the intake.
What Changed for Employers in 2026 Three updates matter for the 2026 plan year. First, the affordability percentage rose to 9.02% from 8.39% in 2024, giving employers a bit more room on employee premium contributions. Second, the employer mandate penalties under IRC 4980H are indexed upward each year. Third, state-level reporting continues to expand; HealthCare.gov and state exchanges share data with states that have individual mandates (California, DC, Massachusetts, New Jersey, Rhode Island, Vermont).
Transition relief and good-faith reporting relief that existed in the early ACA years are long gone. The IRS now assesses penalties based on documented failures, and the Letter 226-J process is how most employers learn they've been tagged.
Running a Clean ACA Compliance Program The teams that keep ACA compliance boring share four habits. They run monthly measurement-period tracking for variable-hour employees rather than reconciling at year-end. They reconcile payroll and benefits enrollment data quarterly. They audit 1095-C codes before transmission. And they keep documentation organized by plan year, so Letter 226-J responses come together in hours, not weeks.
The ACA is not a one-time project. It's a compliance function that needs owner clarity, dated records, and year-over-year muscle memory. Teams that treat it like tax filings get clean results; teams that treat it like a January scramble get Letter 226-J assessments. Clean records also make onboarding smoother, since new hires need accurate plan information on day one, and they keep the compensation story clear when employees compare total-rewards offers.
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