Payroll Reporting Under the Affordable Care Act

The Affordable Care Act (ACA) imposes employer shared responsibility reporting requirements on Applicable Large Employers (ALEs) — organizations that employed an average of 50 or more full-time equivalent employees in the prior calendar year. ALEs must annually file Forms 1094-C and 1095-C with the IRS, reporting information about the health coverage offered to each full-time employee and whether the employer met the minimum essential coverage and minimum value standards. These reports enable the IRS to determine whether the employer is subject to the employer shared responsibility payment and whether employees who enrolled in Marketplace coverage are eligible for premium tax credits. The reporting deadlines parallel W-2 timelines: employee copies of Form 1095-C must be distributed by the IRS-specified deadline (typically January 31 or a date specified by IRS notice), and the Forms 1094-C and 1095-C must be filed with the IRS by the applicable filing deadline for paper or electronic filers. Employers with 250 or more 1095-C forms must file electronically. Payroll teams play a critical role in ACA reporting by providing accurate data on employee hours, employment status, and offer of coverage periods, which benefits administrators use to complete the required forms. Aurora Training Advantage's ACA compliance training helps payroll and HR professionals meet these obligations accurately.

Forms 1094-C and 1095-C are the ACA reporting documents used by Applicable Large Employers to demonstrate compliance with the employer mandate and enable IRS verification of premium tax credit eligibility. Form 1095-C is an employee-level form that reports information about the health coverage offered to each full-time employee: the type of coverage offered (using IRS indicator codes), the employee's share of the monthly premium for the lowest-cost minimum coverage plan, and whether the employee enrolled in the offered coverage. Part II of Form 1095-C uses specific 1A through 1K codes to describe the nature of the coverage offer, each with distinct legal implications for employer shared responsibility. Part III reports enrollment data for employers who sponsor self-funded health plans. Form 1094-C is the transmittal form that accompanies the batch of 1095-Cs filed with the IRS, summarizing total employee counts by month, reporting whether the employer qualifies for any transition relief, and certifying the offer of coverage. Accurate completion of these forms requires coordination between payroll (for hours and employment status data), benefits (for coverage offer and enrollment data), and HR (for full-time employee determination). Errors in the indicator codes or premium amounts can trigger IRS inquiries and potential employer shared responsibility assessments, making training and quality review essential parts of the annual ACA reporting process.

ACA reporting requires unusually close coordination between payroll and benefits administration because the data elements needed for accurate Form 1095-C completion span both functions. Payroll is responsible for tracking and providing hours of service data — which determines whether an employee is classified as full-time for ACA purposes — as well as employment start and termination dates that define each employee's measurement and stability periods. Benefits administration is responsible for tracking coverage offer dates, plan type codes, employee premium contribution amounts, and enrollment elections. In many organizations, these data streams live in separate systems (HRIS, benefits administration platform, and payroll), requiring data integrations or manual reconciliation processes that must be validated before the annual reporting cycle begins. Employers using the look-back measurement method for variable-hour or seasonal employees add complexity to the hours tracking requirement that payroll must manage throughout the year, not just at year-end. Organizations that establish year-round data governance practices — regularly validating hours data, coverage offer records, and employee classification — consistently produce more accurate ACA filings with fewer corrections than those that treat ACA reporting as an annual scramble. Investing in integrated HR and payroll technology that automates ACA data collection reduces both the administrative burden and the error rate in final filings.

ACA reporting penalties apply to both the failure to furnish Form 1095-C to employees and the failure to file accurate forms with the IRS, and they have increased significantly since the initial reporting years. Under IRC Section 6721 and 6722, penalties apply for late filing, failure to file, and filing with incorrect or incomplete information. For 2024 and beyond, penalties for late or incorrect information returns can reach $310 per return for returns filed more than 30 days late, $630 per return for returns filed after August 1, with no caps for intentional disregard violations. Annual caps on penalties provide some relief for smaller organizations with unintentional errors — the calendar year cap for smaller employers is lower than for large employers. The penalties are assessed separately for the IRS filing and the employee copy distribution, meaning an employer who fails both can face double exposure on each affected form. The employer shared responsibility payment (Section 4980H assessments) is a related but separate penalty — not technically a penalty but an excise tax — assessed when an ALE fails to offer adequate affordable coverage and an employee receives a Marketplace premium tax credit. The IRS issues Letter 226J to notify employers of potential shared responsibility assessments, and employers have an opportunity to respond before the assessment is finalized. Maintaining accurate year-round ACA data and investing in quality review of filings before submission are the most effective risk management strategies.

Successful ACA reporting requires payroll teams to establish structured, year-round data sharing processes with HR and benefits rather than attempting to compile required information in a compressed year-end window. The first coordination point is the full-time employee determination methodology — payroll must apply the same measurement period rules consistently throughout the year so that employment and hours data aligns with the coverage offer decisions that benefits is making. Monthly data validation processes that compare payroll headcount to benefits enrollment records catch discrepancies when they are still easy to correct rather than discovering them during the filing sprint. Establishing a shared ACA data dictionary — with agreed definitions for full-time status, offer of coverage dates, and plan codes — reduces miscommunication between systems and teams. Pre-filing quality reviews should include cross-functional participation from payroll, benefits, and HR to validate a sample of 1095-C forms before the full filing is submitted. Clear ownership for each data element — who is responsible for providing hours data, who owns coverage offer codes, who validates premium amounts — prevents both gaps and duplication of effort. Many organizations benefit from a dedicated ACA project coordinator who manages the annual reporting timeline, coordinates across functions, and tracks correction processes for any forms that require amendment after the initial filing. Specialized ACA compliance training for the team members who own each piece of the process is an investment that consistently reduces error rates and penalty exposure.