1. Introduction – What is Form 1094-C?
IRS Form 1094-C, officially titled “Transmittal of Employer-Provided Health Insurance Offer and Coverage Information Returns,” is an annual federal transmittal return administered by the Internal Revenue Service (IRS), an agency of the U.S. Department of the Treasury.
It is authorized under Internal Revenue Code (IRC) Section 6056 and Section 4980H, enacted as part of the Affordable Care Act (ACA). Form 1094-C is used exclusively by Applicable Large Employers (ALEs)—generally businesses with 50 or more full-time equivalent employees—as a master summary and transmittal cover return when submitting Forms 1095-C (“Employer-Provided Health Insurance Offer and Coverage”) to the IRS.
2. Purpose of the Form – Why Does Form 1094-C Exist?
Under the ACA Employer Shared Responsibility provisions (IRC Section 4980H), Applicable Large Employers must offer affordable, minimum essential health coverage that provides minimum value to at least 95% of their full-time employees and their dependents, or face potential employer mandate tax penalties.
While individual Form 1095-C statements report month-by-month health offer codes for each specific full-time employee, the IRS requires a master corporate return to evaluate the employer’s overall workforce compliance.
Form 1094-C serves as this master corporate return. It reports monthly full-time and total employee headcounts, certifies whether minimum essential coverage was offered across the company, discloses controlled corporate group members, and allows the IRS to determine whether the employer complied with the ACA employer mandate.
3. Who Needs to File This Form
Form 1094-C must be filed at the corporate employer level by entities classified as Applicable Large Employers (ALEs). You must complete and file Form 1094-C if your business meets either of these criteria:
- Applicable Large Employers (ALEs): Any business, corporation, partnership, LLC, non-profit, or government entity that employed an average of **50 or more full-time employees** (including full-time equivalent employees [FTEs]) during the preceding calendar year.
- Aggregated ALE Group Members: Any corporate member belonging to an Aggregated ALE Group (controlled parent-subsidiary or brother-sister corporate groups) whose combined corporate headcount across all affiliated companies equaled 50 or more FTEs. Each individual corporate member in an aggregated group must file its own Form 1094-C.
4. Who Is Exempt / Not Required to File
Your business entity is exempt or not permitted to file Form 1094-C if its workforce structure falls into any of these categories:
- Small Employers (<50 FTEs): Employers that employed fewer than 50 full-time equivalent employees during the preceding calendar year. (Small self-insured employers file Form 1094-B and Form 1095-B instead).
- Fully Insured Small Group Plans: Small businesses purchasing fully insured commercial group plans where the insurance carrier, not the employer, files ACA transmittals.
- Individual Employees: Workers receive Form 1095-C statements for their personal tax records; they do not file Form 1094-C.
5. When to File
Form 1094-C is an annual transmittal return covering the preceding calendar coverage year (January 1 through December 31).
Filing deadlines depend on whether the return is submitted on paper or electronically:
| Submission Method | Form 1094-C / 1095-C Filing Deadline |
|---|---|
| Paper Filing (Fewer than 10 returns under waiver) | February 28 following the coverage year |
| Electronic Filing (AIR System) | March 31 following the coverage year |
ALEs requiring additional time can request an automatic 30-day extension by filing Form 8809 (Application for Extension of Time To File Information Returns) on or before the original due date.
6. Where and How to File
Under the Taxpayer First Act, all Applicable Large Employers filing 10 or more information returns in aggregate are legally required to file Form 1094-C electronically.
Electronic transmittals must be submitted through the IRS ACA Information Returns (AIR) system using approved XML software formats. Small filers submitting fewer than 10 paper forms (under an approved waiver) mail signed Form 1094-C on top of paper Copy A Forms 1095-C to the specific IRS service center address as per instructions for Form 1094-C based on the employer’s location.
7. Step-by-Step Instructions to Fill the Form
Form 1094-C consists of four detailed parts that capture employer contact details, transition relief certifications, monthly workforce headcounts, and corporate group relationships. The table below outlines the core parts of the form.
| Form Section | Section Name | Instruction / Description |
|---|---|---|
| Part I (Lines 1–19) | Employer & Transmittal Info | Enter legal employer name, EIN, address, contact person, total Forms 1095-C attached, and check Authoritative Transmittal box. |
| Part II (Lines 20–22) | Certifications of Eligibility | Select offer eligibility methods (Qualifying Offer Method or 98% Offer Method) used for simplified employee reporting. |
| Part III (Cols a–e) | Monthly Workforce Breakdown | Report month-by-month details: Minimum Essential Coverage offered (Yes/No), Full-Time Employee count, and Total Employee count. |
| Part IV (Lines 36–65) | Aggregated Group Members | If part of a controlled corporate group, list legal names and EINs of all other corporate members in the group. |
Detailed Filling Steps
- Complete Employer Identification (Part I): Enter your company’s legal business name, nine-digit EIN, primary contact details, and total count of Forms 1095-C transmitted. Check Line 19 **Authoritative Transmittal** if this is the master return consolidating your entire corporate workforce.
- Select Eligibility Offer Methods (Part II): Check Box A (Qualifying Offer Method) if you offered affordable minimum value coverage to full-time staff, or Box D (98% Offer Method) if you offered coverage to at least 98% of employees.
- Report Monthly Health Offer Status (Part III, Col a): For each calendar month (Jan through Dec), check “Yes” if minimum essential health coverage was offered to at least 95% of your full-time employees and their dependents.
- Report Monthly Employee Headcounts (Part III, Cols b & c): For each month, enter the exact count of full-time employees in Column (b) (using 30-hour/week ACA rules) and total employee headcount in Column (c).
- Disclose Controlled Corporate Groups (Part IV): If your business belongs to a parent-subsidiary or brother-sister controlled group, list the legal names and EINs of all affiliated corporate member entities.
- Sign and Submit: An authorized corporate officer or HR director must sign, date, and enter their official title before transmitting the form via the IRS AIR system.
8. Required Documents/Information Needed Before Filling
To ensure an accurate Form 1094-C submission, gather the following payroll and benefits records before preparing the form:
- Corporate EIN & Controlled Group List: Employer Identification Number and legal names/EINs of all sister companies in an Aggregated ALE Group.
- Monthly Full-Time Employee Headcount Ledgers: Month-by-month payroll reports calculating full-time employees (30+ hours/week) and full-time equivalent employees (FTEs).
- Monthly Health Insurance Offer Records: Benefits enrollment statements verifying health coverage offers made to full-time staff.
- Complete Batch of Forms 1095-C: Verified Copy A records for all full-time employees.
- AIR System TCC Credentials: Transmitter Control Code (TCC) software login credentials for electronic AIR filing.
9. Common Mistakes to Avoid
Errors on Form 1094-C can trigger automated IRS employer mandate penalty notices (Letter 226J). Watch out for these frequent mistakes:
- Forgetting to Check “Authoritative Transmittal” (Line 19): Filing multiple 1094-C forms across operating divisions without marking one master return as the Authoritative Transmittal.
- Miscalculating Monthly Full-Time Employee Headcounts: Entering average working hours or counting seasonal/part-time workers in Column (b) full-time headcounts instead of applying strict 30-hour/week ACA rules.
- Mismatched 1095-C Form Counts: Reporting a total Form 1095-C count on Line 18 that fails to match the actual number of 1095-C forms transmitted to the IRS.
- Paper-Filing Over the 10-Return Limit: Mailing paper Forms 1094-C/1095-C when required to file electronically (e-filing is mandatory for 10+ total returns!).
- Omitting Aggregated Controlled Group Members (Part IV): Failing to list all affiliated parent or subsidiary entities in Part IV.
10. Penalties for Non-Filing or Errors
Failing to file Form 1094-C or misreporting employee coverage details carries severe financial penalties under federal law:
- IRC Section 4980H(a) Employer Mandate Penalty (“Hammer Penalty”): Assessed if an ALE fails to offer minimum essential coverage to at least 95% of full-time employees, costing thousands of dollars per full-time employee annually (issued via IRS Letter 226J).
- IRC Section 4980H(b) Penalty: Assessed if coverage was offered but was determined to be unaffordable or lacked minimum value.
- Information Return Penalties (IRC Section 6721 & 6722): Fines for late or unfiled 1094-C/1095-C transmittals ranging from **$60 to $310+ per unfiled return**, with penalties exceeding **$630+ per return** for intentional disregard!
11. Related Forms or Schedules
HR directors and benefits managers handling Form 1094-C frequently interact with these related federal tax forms:
- Form 1095-C: Employer-Provided Health Insurance Offer and Coverage.
- Form 1094-B: Transmittal of Health Coverage Information Returns (for small self-insured employers).
- Form 1095-B: Health Coverage.
- Form 8809: Application for Extension of Time To File Information Returns.
- Form SS-4: Application for Employer Identification Number.
12. Frequently Asked Questions
1. What is IRS Form 1094-C used for?
Form 1094-C is an annual transmittal cover return used by Applicable Large Employers (ALEs) to transmit Forms 1095-C to the IRS and certify corporate ACA healthcare mandate compliance.
2. What is an Applicable Large Employer (ALE)?
An ALE is any business, corporation, partnership, or non-profit that employed an average of 50 or more full-time equivalent employees (FTEs) during the preceding calendar year.
3. What is an “Authoritative Transmittal” on Form 1094-C?
An Authoritative Transmittal is the master Form 1094-C filed by an ALE that consolidates workforce headcounts, certifications, and total 1095-C form counts across the entire corporate entity.
4. What is the difference between Form 1094-B and Form 1094-C?
Form 1094-B is used by insurance carriers and small self-insured employers (<50 FTEs). Form 1094-C is used exclusively by Applicable Large Employers (50+ FTEs).
5. What is IRS Letter 226J?
Letter 226J is the official penalty notice issued by the IRS to Applicable Large Employers informing them of proposed Employer Shared Responsibility Payment (ESRP) penalties under Section 4980H based on Form 1094-C filings.
6. Can Form 1094-C be e-filed?
Yes. Federal law mandates that Form 1094-C must be e-filed electronically via the IRS ACA Information Returns (AIR) system using approved tax software.
13. Conclusion – Key Takeaways
IRS Form 1094-C is the cornerstone annual corporate transmittal return for Applicable Large Employers across the United States. By providing a master summary of full-time employee headcounts, certifying minimum essential coverage offers across all 12 calendar months, disclosing corporate controlled group members, and transmitting Forms 1095-C, ALEs satisfy ACA Section 6056 requirements and protect their company from massive Section 4980H penalty assessments. Audit monthly full-time employee headcounts early, mark your Authoritative Transmittal on Line 19, verify 95% health offer thresholds, and e-file Form 1094-C via the AIR system by March 31.
