When filing Form 1095-C, employers must use Line 16 codes to explain why an employee did not enroll in coverage or why coverage is considered affordable. These codes are part of the IRS’s system for enforcing the Affordable Care Act (ACA) employer mandate.
Step 1: Start with Section 14
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If you use code 1A on Line 14, you’re reporting that you offered coverage that is affordable under the federal poverty line safe harbor.
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If the employee enrolls, the code in Line 16 will typically be 2C.
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If the employee declines coverage, you must enter the appropriate safe harbor code in Line 16.
Step 2: Understanding Section 16 Safe Harbor Codes
Employers use Line 16 to explain why their offer of coverage is considered affordable, even if the employee did not enroll. Common safe harbor codes include:
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2E – Multiemployer Interim Rule Relief
Use when the employee is eligible for coverage under a union or multiemployer plan. -
2F – Form W-2 Safe Harbor
Affordability is based on the employee’s wages reported in Box 1 of Form W-2. -
2G – Federal Poverty Line Safe Harbor
Coverage is affordable if the employee’s required contribution does not exceed a set percentage of the federal poverty line. -
2H – Rate of Pay Safe Harbor
Coverage is affordable if the employee’s required contribution does not exceed a set percentage of their monthly rate of pay.
👉 Related reading: Form 1095-C Coding Guide
Step 3: Applying the Correct Code
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If the employee enrolled, use 2C.
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If the employee declined coverage, use 2F, 2G, or 2H depending on which safe harbor applies.
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If the employee is covered under a multiemployer plan, use 2E.
Each code tells the IRS why your coverage was affordable and protects your company from Employer Shared Responsibility Penalties (ESRP).
Why This Matters
Using the correct Line 16 code ensures that the IRS understands why an employee did not enroll and that your offer of coverage still met ACA requirements. Incorrect or missing codes can trigger penalties, audits, or correction notices.
👉 Related reading: What Should I Do If I Missed Filing ACA Forms for a Prior Year?
Key Takeaway
Employers must code Section 16 accurately to explain affordability. Whether you use the W-2, federal poverty line, or rate-of-pay safe harbor, these codes are the IRS’s way of verifying compliance with the ACA employer mandate.