Employers in six US jurisdictions must file health coverage reports with their state tax authorities in addition to federal ACA reporting. Filing Forms 1094-C and 1095-C with the IRS satisfies none of these state obligations, and the vendors, payroll providers, and carriers that handle federal ACA reporting do not always pick up the state filings automatically.
The six jurisdictions are California, the District of Columbia, Massachusetts, New Jersey, Rhode Island, and Vermont. Each enacted its own individual health coverage mandate after the federal individual mandate penalty was reduced to zero in 2019. Five of the six require active employer reporting. Vermont has a mandate but currently imposes no employer filing requirement.
The most common failure, documented consistently across compliance advisories, is an employer assuming another party handled the state obligation. That assumption is often wrong. A carrier filing federal forms with a state agency on the employer’s behalf does not automatically discharge the employer’s own reporting duty in every jurisdiction. Where the employer is ultimately responsible, a missed filing is the employer’s problem.
The exposure is not uniform across states. Massachusetts operates entirely differently from the others: rather than accepting standard 1095-C forms, it requires Form MA 1099-HC for individual coverage reporting and a separate Health Insurance Responsibility Disclosure (HIRD) form for employer-level reporting, both submitted through MassTaxConnect. An employer whose ACA vendor does not specifically support Massachusetts filings may be unaware that a different process applies. California imposes a penalty of $50 per covered individual not reported on time. New Jersey similarly assesses $50 per form for late or missing filings.
The trigger is residency, rather than the employer’s location. An employer headquartered in a state with no individual mandate still acquires state reporting obligations the moment an employee covered by the group plan lives in California, New Jersey, Massachusetts, DC, or Rhode Island. State-level health coverage mandate requirements have followed a similar pattern of incremental expansion, mirroring the spread of paid family and medical leave programs, with more states expected to enact individual mandates in coming years.
State filing deadlines for 2026 coverage year data run from late January through April 2027, with most falling between March and April. Those deadlines are distinct from the federal schedule, and some, particularly California’s, have different forms and submission portals entirely. Employers should not wait for W-2 season to begin reconciling state reporting responsibilities. Massachusetts employers face an earlier obligation: the HIRD form must be filed through MassTaxConnect by December 15, before most other state filing windows open.
The practical action is to map employees and covered individuals by work and residence location, identify which mandate jurisdictions apply, confirm who is responsible for each state’s filing, and obtain written confirmation from that party before filing season begins. Where no party has explicitly accepted responsibility for a state filing, the employer bears it by default.
