ACA Compliance Guide for Employers in 2026

A missed ACA filing rarely starts with a missed filing. It usually starts months earlier with incomplete payroll data, an employee whose status changed without being reviewed, or a benefits decision made without considering affordability. This ACA compliance guide is designed to help employers put practical controls around those pressure points before reporting season makes them urgent.

For small and mid-sized employers, ACA compliance is not just an HR task or a payroll task. It sits at the intersection of workforce planning, health plan design, payroll administration, employee communication, and tax reporting. The right process should be repeatable, documented, and proportionate to the size and complexity of your organization.

Start With Your Applicable Large Employer Status

The first question is whether your organization is an Applicable Large Employer, commonly called an ALE. In general, an employer is an ALE if it averaged at least 50 full-time employees, including full-time-equivalent employees, during the prior calendar year. For this purpose, a full-time employee is generally someone averaging at least 30 hours of service per week or 130 hours per month.

That 50-employee threshold is more nuanced than it looks. Part-time hours count when calculating full-time equivalents, and organizations under common ownership may need to combine their employee counts under the controlled-group or affiliated-service-group rules. Seasonal worker rules can also affect the analysis in limited circumstances.

Employers close to the threshold should calculate status carefully rather than relying on a headcount from one month. A company with 35 full-time employees and a substantial part-time workforce may still be an ALE. Conversely, an employer that is not an ALE is generally not subject to the employer shared-responsibility provisions or the same ACA reporting requirements, although other health plan requirements may still apply.

Offer Coverage That Meets ACA Standards

ALEs generally need to offer minimum essential coverage to at least 95% of their full-time employees and their dependent children up to age 26. The coverage must also meet minimum value standards and be affordable under ACA rules. If those conditions are not met, and a full-time employee receives subsidized coverage through the Health Insurance Marketplace, the employer may face an employer shared-responsibility payment.

Minimum value is generally a plan-design question. A plan meets minimum value when it is designed to cover at least 60% of the total allowed cost of benefits and includes substantial coverage for inpatient hospital and physician services. Most employer-sponsored major medical plans are evaluated for this as part of plan selection, but employers should retain documentation rather than make assumptions.

Affordability is more operational. The employee-only premium for the lowest-cost minimum-value plan offered to a full-time employee cannot exceed the annually adjusted ACA affordability percentage of the employee’s household income. Since employers rarely know household income, the IRS provides safe harbors based on W-2 wages, rate of pay, and the federal poverty line.

Each safe harbor has trade-offs. The W-2 safe harbor may work well when wages are stable, but it can be less predictable when compensation varies. Rate of pay can be useful for hourly and salaried employees, though employers need to apply its rules consistently. The federal poverty line safe harbor can offer administrative simplicity but may require a lower employee contribution. Plan contributions should be tested before open enrollment, not after an employee raises a concern.

Do Not Overlook Dependent Coverage and Waiting Periods

Offering coverage to an employee but not to eligible dependents can create ACA exposure. For ACA purposes, dependent children are generally included, while spouses are not required to be offered coverage under the employer mandate. That distinction does not determine what is best for recruitment or retention, but it matters for compliance analysis.

Waiting periods also need attention. Eligible employees generally cannot be required to wait more than 90 days for coverage to become effective. Employers using variable-hour, seasonal, or part-time workforces can use measurement and stability periods to determine full-time status, but the timing rules must be established and administered consistently.

Build Reliable Employee-Status Tracking

A sound ACA compliance process depends on clean, timely information. HR, payroll, benefits administration, and any staffing or timekeeping systems should tell the same story about hire dates, rehire dates, employment classifications, hours worked, offers of coverage, elections, waivers, and termination dates.

Variable-hour employees deserve particular attention. If your organization uses a look-back measurement method, identify the standard measurement period, administrative period, and stability period in writing. Then make sure the system used to calculate hours includes every category of hours of service that applies to your workforce. Paid leave, unpaid leave under protected leave rules, and employment through related entities can complicate this review.

A practical monthly review is far easier than a year-end reconstruction. Confirm who is full-time under your chosen method, who became newly eligible, who declined coverage, and whether employee contributions still satisfy your affordability strategy. Review unusual situations, including leaves of absence, transfers between entities, changes from part-time to full-time work, and rehires.

Treat ACA Reporting as a Year-Round Recordkeeping Job

ALEs generally report health coverage information to employees and the IRS using Forms 1095-C and 1094-C. Employers that sponsor self-insured coverage may have additional reporting responsibilities because they must report covered individuals, including covered dependents.

The codes on Form 1095-C are not simply administrative labels. They communicate whether coverage was offered, to whom it was offered, the employee share of the lowest-cost premium, and which affordability or other relief code applies for each month. Incorrect coding can trigger an IRS inquiry even when the employer offered appropriate coverage.

Create a reporting calendar that begins well before January. Your team or vendor should reconcile enrollment data with payroll deductions, review monthly offer codes, verify Social Security numbers and addresses, and identify employees with incomplete records. Keep copies of filed forms, employee statements, transmittal confirmations, plan documents, affordability calculations, and the records that support your full-time determinations.

Electronic filing requirements apply to many employers, and filing rules, deadlines, and forms can change. For that reason, employers should confirm the current IRS instructions each reporting year rather than reusing last year’s calendar without review. If a third-party administrator, payroll provider, or reporting vendor prepares the forms, the employer still remains responsible for the accuracy of the information submitted.

Prepare for IRS Letters Before One Arrives

An IRS Letter 226J may indicate that the IRS believes an employer could owe an employer shared-responsibility payment. It is not a bill to ignore or an automatic finding that the IRS is correct. The notice should be reviewed promptly against the organization’s Forms 1095-C, employee records, proof of coverage offers, affordability calculations, and any Marketplace notices available.

The response window can be short. Employers should assign clear ownership for receiving tax notices, including notices sent to an outdated address or a former contact. A broker, benefits consultant, payroll partner, accountant, and legal counsel may each have a role in gathering facts, but someone inside the organization should be accountable for coordinating the response.

The best defense is documentation created in the ordinary course of administration. Rebuilding the facts after an IRS notice arrives is more difficult, more expensive, and less reliable than maintaining records throughout the year.

Use Open Enrollment to Check the Whole Process

Open enrollment is the right time to test more than plan pricing. Review the eligible class definitions, employee contribution schedule, dependent eligibility, waiting-period language, affordability approach, enrollment materials, and payroll setup as one connected process. A contribution change that makes financial sense can still create an affordability problem if it is not modeled against the applicable safe harbor.

This is also an opportunity to confirm that employee communications are clear. Employees need to understand when coverage begins, what action they need to take, the cost of employee-only and dependent coverage, and where to direct questions. Clear communications reduce avoidable enrollment errors and help support a more consistent administrative record.

For employers in Pennsylvania, New Jersey, Delaware, and other states, local workforce patterns can add complexity, particularly when employees work across state lines or remotely. Federal ACA requirements remain central, while payroll, leave, and state insurance considerations may require a coordinated review.

When Outside Support Makes Sense

Not every employer needs the same level of ACA administration. A stable employer with a straightforward workforce may need an annual compliance review and reporting oversight. An employer with variable-hour staff, multiple entities, frequent acquisitions, or rapid growth may need more active measurement, data audits, and plan-design support.

Franklin Benefits Group helps employers approach benefits as a business decision with compliance consequences, not as a once-a-year renewal exercise. The goal is to align coverage, contributions, workforce practices, and reporting so leadership can make informed choices with fewer surprises.

The most useful ACA process is one your team can follow when personnel change, payroll systems change, or the organization grows. Put the ownership, calendar, and documentation in place now, and compliance becomes a managed responsibility rather than a year-end scramble.