1095-C Reporting Requirements Overview

Form 1095-C is the primary instrument through which Applicable Large Employers (ALEs) report health coverage offers to the IRS and to full-time employees under Internal Revenue Code Section 6056. The form documents whether an employer offered minimum essential coverage, whether that coverage met affordability and minimum value standards, and which employees enrolled. Accurate completion of Form 1095-C directly determines whether an employer is exposed to assessable payments under IRC Section 4980H, making it one of the most consequential compliance documents in the ACA reporting framework.

Definition and Scope

Form 1095-C, titled "Employer-Provided Health Insurance Offer and Coverage," is a return filed annually by ALEs under the employer shared responsibility provisions of the Affordable Care Act. The IRS defines an ALE as any employer that employed an average of at least 50 full-time employees (including full-time equivalent employees) during the preceding calendar year (IRS, IRC §4980H).

The reporting obligation under IRC §6056 applies to each ALE member separately. An ALE member is a single entity within a controlled group of corporations or affiliated service group that, combined, meets the 50-employee threshold. Each ALE member files its own set of Forms 1095-C and submits a Form 1094-C transmittal. The reporting covers all individuals who were full-time employees for at least one month of the calendar year, with "full-time" defined as averaging 30 or more hours of service per week, or 130 hours per month (IRS Notice 2012-58).

Self-insured ALEs carry an additional reporting layer. Because self-insured plans must also satisfy the Section 6055 requirement — documenting actual enrollment in minimum essential coverage — self-insured ALE members complete Parts I, II, and III of Form 1095-C. Fully insured ALEs complete only Parts I and II; the insurance carrier files Form 1095-B to satisfy the Section 6055 obligation for enrolled individuals.

How It Works

The 1095-C reporting process operates in a structured sequence tied to the calendar year and IRS filing deadlines. The filing deadlines and extensions page addresses the specific due dates in detail, but the underlying workflow follows five discrete phases:

  1. Data collection — The employer gathers month-by-month records of coverage offers, employee eligibility status, employee contribution amounts, and enrollment data for self-insured plans.
  2. Employee classification — Each employee is classified as full-time or non-full-time for each calendar month, using either the monthly measurement method or the look-back measurement method.
  3. Code assignment — Lines 14, 15, and 16 of Form 1095-C are populated using Series 1 and Series 2 indicator codes that describe the type of offer made, the employee's required premium contribution for the lowest-cost self-only plan, and the reason, if any, that coverage was not offered or was not enrolled in.
  4. Form generation and furnishing — A completed Form 1095-C is provided to each full-time employee by the IRS-prescribed date. Employers with 250 or more Forms 1095-C to file must submit electronically through the IRS Affordable Care Act Information Returns (AIR) system (IRS Publication 5165).
  5. Transmittal filing — The employer files Form 1094-C as the cover sheet aggregating all Forms 1095-C for the ALE member, indicating whether the ALE qualifies for any transition relief and certifying the offer of coverage to at least 95 percent of full-time employees (the threshold for avoiding the §4980H(a) assessable payment).

Common Scenarios

Three recurring scenarios account for a large share of 1095-C complexity.

Scenario 1: Variable-hour employees transitioning to full-time status. An employer using the look-back measurement method may have employees who were non-full-time during a measurement period but average 30 or more hours during a subsequent stability period. For those months, the employee must be treated as full-time on Form 1095-C regardless of actual hours worked in that month. Misstating this status is one of the most common errors identified in IRS penalty notices.

Scenario 2: Mid-year terminations. When an employee terminates coverage mid-year, the employer must report each month separately. A terminated employee who was full-time for 6 months receives a Form 1095-C reflecting full-time status for those 6 months and the appropriate code on Line 16 indicating termination — typically Code 2B if the employee was no longer employed.

Scenario 3: Multiemployer (union) plans. Employers contributing to a qualifying multiemployer plan on behalf of employees may use Code 1H on Line 14 and Code 2E on Line 16 for those employees, reflecting the multiemployer arrangement interim guidance (IRS Notice 2015-87). This designation signals that the employer has satisfied its offer obligation through the collectively bargained arrangement.

The ACA compliance overview addresses the broader employer mandate framework within which these scenarios arise.

Decision Boundaries

The most consequential classification decisions on Form 1095-C involve Line 14 and Line 16 code selection, because those codes directly inform IRS penalty calculations under §4980H.

Line 14 codes (Series 1) capture the nature of the offer: whether coverage was offered to the employee only (Code 1B), to the employee and dependents but not spouse (Code 1C), to the employee, spouse, and dependents (Code 1E), or not offered at all (Code 1H). Selecting 1H triggers scrutiny for a potential §4980H(b) liability for each month an employee received a premium tax credit.

Line 15 must reflect the employee's share of the lowest-cost monthly premium for self-only minimum value coverage available through the plan. This figure is critical to affordability determinations; the ACA affordability standard specifies the percentage-of-income threshold that the Line 15 amount is tested against.

Line 16 codes (Series 2) establish the employer's affirmative defense or exemption for months when coverage was not enrolled in. Code 2C (enrolled in coverage) eliminates §4980H(b) exposure for that month. Code 2A (not employed) eliminates all exposure. Codes 2F, 2G, and 2H correspond to the three affordability safe harbors — W-2, rate of pay, and federal poverty line, respectively.

An employer that fails to file or furnishes incorrect information faces penalties under IRC §6721 and §6722. For 2024 returns, the penalty for failure to file a correct information return is $310 per return, up to a calendar-year cap of $3,783,000, with reduced amounts for corrected returns filed within specified windows (IRS Revenue Procedure 2023-34).

References

The law belongs to the people. Georgia v. Public.Resource.Org, 590 U.S. (2020)