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What is an applicable large employer?
The 50-employee threshold, the prior-year averaging rule, controlled group aggregation under § 414, the seasonal worker exception, and what changes the day you cross the line.
ACA compliance, organized by the question you are actually asking
The ACA’s employer shared responsibility provisions apply to applicable large employers — employers that averaged at least 50 full-time and full-time-equivalent employees during the prior calendar year. An ALE must offer minimum essential coverage that is affordable and provides minimum value to at least 95% of its full-time employees and their dependents, or face a payment under Internal Revenue Code § 4980H if a full-time employee receives subsidized Marketplace coverage.
New to this topic? Read in this order
- Determine whether you are an applicable large employer
- Understand how full-time equivalents are calculated
- Evaluate affordability and the safe harbors
- Understand what an inadequate offer costs
- Select or review your employee measurement method
- Evaluate coverage, affordability and minimum value
- Confirm your reporting obligations
- Check your own numbers with the calculator
Annual figures — the affordability percentage and the § 4980H amounts — live on the detail pages and in the calculator, not here, so this page does not go stale. Every figure we publish is linked to its controlling revenue procedure and carries the date we reviewed it. Nothing here is legal or tax advice.
This cluster sits inside the Employee Benefits & ACA Resource Center. To talk through your own plan rather than read the rules, start with 4J’s employee benefits practice.
Understand employer status
How to calculate full-time equivalents
Which hours count, the 120-hour cap and divisor, why full-time is 130 hours a month and not 120, and the six mistakes that produce a wrong answer.
Check your status now
Screen ALE status from your own headcount and hours, aggregate commonly owned businesses, and test whether your current employee contribution is likely to clear affordability.
Most ACA penalties are not caused by refusing to offer coverage. They are caused by an offer made to the wrong count, priced above the safe harbor, or never documented on the forms.
Understand coverage, measurement and reporting
Affordability and the safe harbors
Affordability is measured against employee household income, which no employer can see. The W-2, rate-of-pay and federal poverty line safe harbors are how employers prove it using data they actually hold.
Employer mandate penalties
How the § 4980H(a) and § 4980H(b) payments are triggered, how each is calculated, why the 95% threshold matters, and what an employer can still do after a coverage gap.
Minimum essential coverage vs minimum value
Two separate tests with two separate penalties. The 60 percent standard, the hospitalization and physician requirement, and why a cheap plan offered to everyone is not a defence.
Monthly vs look-back measurement
How full-time status is identified once you are an ALE, and the measurement, administrative and stability periods that lock it in.
Forms 1094-C and 1095-C reporting
What each form reports, who must file, the furnishing and electronic filing deadlines, and why the indicator codes are what actually drive an IRS inquiry.
Not sure whether the mandate applies to you?
A benefits compliance review reads your census, offer, contribution structure and filings against what § 4980H actually requires, and produces a written list of the gaps.