Map the employer before assigning a transmittal
An applicable large employer member can divide its Forms 1095-C among several transmittals, but exactly one must be authoritative for that ALE member. The authoritative information covers the employer across its batches. It does not combine every EIN in an aggregated ALE group. See the 2025 authoritative-transmittal instructions.
Identify the legal employer, year and every preparer or division contributing records. Establish the authoritative owner before allowing a vendor default to select it. Related employers retain their own reporting structure.
Match each number to its field definition
Line 18 counts Forms 1095-C accompanying the particular transmittal. Line 20 on the authoritative form reports the total filed by or on behalf of that ALE member. Parts II, III and IV have employer-level scope on the authoritative transmittal. Use the 2025 form with its instructions.
The Part III full-time and total employee counts use different definitions. Record the applicable measurement review and the permitted consistent total-count date choice. The minimum essential coverage offer indicator also has its own rules; it is not an independent certification that every employee's offer was affordable.
Review a fictional two-batch employer
Fictional Alder Bridge has 180 reviewed annual employee-employer records. Provider A prepares 110 and provider B prepares 70. The authoritative transmittal accompanying A has line 18 equal to 110 and line 20 equal to 180. B's nonauthoritative transmittal accompanies 70.
Before approval, the employer checks that a person appearing in both source systems has a single complete annual record for this same ALE member. An overlapping payroll source should not become two partial-year originals. The 180 total is meaningful only after that membership reconciliation.
Connect group facts and later corrections to the record
Review line 21, Part III group indicators and Part IV against the same dated entity determination. Keep the reporting member separate from the required list of other members. An updated organization chart alone may not describe relationships during the reporting year.
For a post-filing error, identify the original authoritative record, actual outcome and affected fields. The correction instructions call for a complete standalone corrected authoritative 1094-C, without accompanying 1095-Cs, and say not to correct a nonauthoritative transmittal. Electronic association details and any separate employee-form changes require the applicable AIR procedure.
Choose a practical guide
Use the practical guide library below for the next step. Each guide includes a worked example, a diagram and a downloadable worksheet.
Questions from reporting teams
Does every batch need an authoritative 1094-C?
No. One ALE member has one authoritative transmittal covering its employer-level information, even when several providers prepare its batches.
Can line 18 differ from line 20?
Yes. Line 18 concerns accompanying forms; line 20 concerns all forms filed by or on behalf of the employer. Reconcile both to an identified inventory.
Does a 95% offer indicator prove affordability?
The offer indicator and employee-level affordability or safe-harbor review have distinct requirements. Review each applicable field under its own instructions.
Should we attach employee corrections to an authoritative correction?
Handle the authoritative correction as its specified standalone action. Review any employee corrections separately and give the transmitter the relevant original records and outcomes.
Prepare your employer's 1094-C filing
Create a BoomTax account to begin your organization's filing setup. Keep the reporting year, expected return volume and reviewed source records available as you prepare the project.
