1095-C Employer Filing Calendar with Internal Cutoffs

Identify each applicable large employer member, reporting EIN, employee population and funding arrangement. The C-series instructions require each ALE member to file under its own EIN, even within an aggregated group. One corporate project calendar can coordinate the work, but it must preserve each member's reporting obligations.

Assign the authoritative 1094-C responsibility and determine how divisions or providers contribute data. If multiple transmittals are filed for a member, one must be designated authoritative and contain the required aggregate information. This is a schedule dependency: employer-level review cannot finish while a division's employee population or monthly counts remain missing.

The final 2025 C-series instructions explicitly give March 2, 2026 for paper IRS filing and March 31, 2026 for electronic filing. They give March 2, 2026 for ordinary employee furnishing. This guide uses that verified historical cycle as its dated reference, not as a projected calendar for 2026 coverage.

Record the official source year, date checked and applicable method for the actual cycle. Verify electronic-filing requirements using aggregated information-return counts before assuming paper is permitted. Keep state obligations separate. An employer may have different operational dates for benefits review, employee statements and IRS submission even when some government deadlines coincide.

HR supplies employment and entity history; payroll supplies hours and relevant employee data; benefits supplies offer, contribution and enrollment information; the reporting team resolves coding decisions. Document the actual source and owner for every needed input rather than assuming the filing vendor can infer missing facts.

For self-insured employers, include covered-person enrollment information needed for Part III. For insured employers, distinguish the carrier's coverage reporting from the employer's C-series offer reporting. The calendar should require complete inputs and actual review decisions, not simply a list of meetings. Every handoff needs a version, expected population and acceptance evidence so a delayed source can be identified quickly.

Identify the backup contact for each handoff and the source needed to resume work. When HR changes an employee population after benefits review, route the change back to the affected reviewer and provider. The calendar should show that dependency instead of leaving every team marked complete.

A fictional ALE member has two divisions and one reporting provider. Its internal schedule runs backward from a verified release target. These intervals are planning commitments, not new legal deadlines or automatic extensions.

A division's missing data remains an explicit blocker to the affected review. Do not close the employer aggregate merely because the other division is ready.

Notice 2025-15 extends the qualifying notice-and-request furnishing method to section 6056 full-time employee statements for calendar years after 2023. It is broader than the older special method for certain non-full-time employees and nonemployees in self-insured coverage. Keep the authority for the chosen method with the calendar.

When using that method, schedule timely notice publication, required website availability and individual responses under the later-of January 31 or 30-days-after-request rule. Alternatively, schedule direct furnishing and applicable electronic consent. Neither choice removes IRS reporting. Assign monitoring for the advertised email and mailing channels, including requests from former employees who no longer have internal portal access.

The C-series instructions describe the timely filing-extension process. Consult current Form 8809 instructions and submission channels before execution; older instructions can retain FIRE references. A filing extension does not automatically change employee furnishing or request-response duties.

Set a late-change route for employment, offer or enrollment information discovered after release. Preserve the prior version and determine whether a prefiling update or correction is required. Close each calendar row with actual evidence, including employer approval, agency outcome, direct furnishing or notice/request performance. Carry unresolved items with named next actions instead of labeling the whole corporate project complete from one vendor acknowledgment.