Construction firms contributing to union health funds file Form 1095-C, not the fund administrator. For HR directors and finance teams at multi-employer construction operations, that distinction creates a concrete filing problem: you own the 1095-C, but the trust fund holds the enrollment data.
Knowing how to code Lines 14 and 16 correctly produces an audit-ready filing and keeps §4980H liability off the table.
Who Is Responsible for Filing Form 1095-C When a Union Provides Benefits?
The short answer: the employer.
ALE status and the Section 6056 reporting obligation does not transfer to a union trust fund when an employer contributes on behalf of its workers. The fund does not file Form 1095-C.
This distinction can drive 1095-C coding errors in the construction sector. When the HR team cannot obtain individual enrollment records from the fund administrator, the instinct is often to leave fields blank or apply an inapplicable code.
Both approaches will generate data mismatches when the IRS AIR System processes the filing.
What Do Lines 14 and 16 Mean for Multi-Employer Plan Participants?
- Line 14 (offer-of-coverage indicator): the type of coverage offered to the employee each month, if any.
- Line 16 (safe harbor or relief code): whether a safe harbor applies, which affects §4980H liability.
For employers contributing to a qualifying multi-employer plan, the Multi-Employer Interim Rule sets the correct combination: 1H on Line 14 and 2E on Line 16.
Code 1H reflects that the union trust fund, not the employer, is the plan sponsor. Code 2E provides relief from both §4980H(a) and §4980H(b) liability and eliminates the need to report a dollar amount on Line 15.
The rule applies when:
- The employer contributes under a collective bargaining agreement
- The plan offers coverage to employees who meet its eligibility rules
- The coverage is affordable and provides minimum value
While the IRS continually notes that this interim rule could face future modifications, it remains the standard safe harbor for the current filing season.
What Happens When the Wrong Codes Are Used on a Union Worker’s 1095-C?
Incorrect coding on a union worker’s 1095-C doesn’t sit unread. It goes into the IRS AIR System, which runs automated cross-referencing against individual tax returns.
Common coding errors in the construction sector include:
- Leaving Line 16 blank when 1H is entered on Line 14. A blank Line 16 leaves no safe harbor in place. If that worker later claims a Premium Tax Credit (PTC) on an exchange, the IRS AIR System will flag the filing and issue a Letter 226J.
- Applying the W-2 Wage Safe Harbor code (2F) for a union worker covered by the multi-employer interim rule, IRS instructions require 2E, not 2F, 2G, or 2H. The W-2 Wage, ROP, or FPL Safe Harbors are not available as alternatives in this context.
How Can Construction Employers Build an Audit-Ready 1095-C Filing Process?
The 1H/2E combination works, but only when applied consistently and only to eligible months.
Establish a Data Channel With the Trust Fund
At minimum, employers need month-by-month contribution records that identify which employees were covered under the multi-employer plan. Individual enrollment records aren’t required. Contribution data is sufficient to apply 1H/2E correctly.
Run Pre-transmission Validation Before Filing
Before forms reach the IRS, a validation pass should flag months where 1H/2E is applied inconsistently, or where an employee falls outside the qualifying multi-employer plan window.
A worker no longer covered by the collective bargaining agreement, for example, may not qualify for 2E relief. Inconsistent application across a single employee’s record is exactly what the IRS AIR System is built to catch.
How Do Construction Employers Make the 1H/2E Code Sequence Audit-Ready?
The 1H/2E combination is only as reliable as the contribution data behind it. Applying it correctly requires a direct channel to the trust fund, monthly records reconciled against CBA eligibility, and pre-transmission validation before anything reaches the IRS AIR System.
A managed services partner owns that execution. Trusaic’s ACA Compliance Solution integrates multi-employer contribution records and applies the correct code sequence on your behalf. Request a Penalty Risk Assessment to see where your current process has gaps.