ACA information reporting

Form 1094-C: The ALE Transmittal and Summary

What applicable large employers should understand about Form 1094-C, current deadlines, and the federal electronic-filing threshold.

Last reviewed: August 21, 2026United States · FederalPrimary-source reviewed
2026 filing snapshot: For calendar-year 2025 reporting, Forms 1094-C and 1095-C are due March 2, 2026 on paper or March 31, 2026 electronically.

What Form 1094-C does

Form 1094-C is the transmittal used by an Applicable Large Employer member to accompany its Forms 1095-C. It summarizes employer information, identifies the authoritative transmittal, and reports information used by the IRS to administer the employer shared-responsibility provisions.

Who files

Each ALE member generally files its own Form 1094-C and associated Forms 1095-C. ALE status is determined by applying the federal full-time and full-time-equivalent employee rules across the prior calendar year, including applicable aggregation rules.

March 2, 2026Paper filing deadline for 2025 calendar-year reporting because February 28 falls on a weekend.
March 31, 2026Electronic filing deadline for 2025 calendar-year reporting.

Electronic filing

The former 250-return threshold is obsolete. A filer generally must file electronically when it is required to file 10 or more covered information returns in aggregate during the year. A hardship waiver may be available through Form 8508.

Before filing

  • Confirm ALE status and controlled-group treatment.
  • Reconcile full-time employee counts and offer-of-coverage data.
  • Identify the authoritative transmittal.
  • Validate the total number of Forms 1095-C.
  • Use the ACA Information Returns system when electronic filing is required.

Primary sources

This resource is provided for general educational purposes and does not constitute legal, tax, benefits, or other professional advice. Requirements and individual circumstances vary. Confirm current rules with authoritative sources and qualified advisors.

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