When is the ACA 1094-C / 1095-C IRS filing deadline?
March 31 for electronic filing of Forms 1094-C and 1095-C with the IRS through the AIR system. Paper filing, where still permitted, is due at the end of February — but employers filing 10 or more information returns in aggregate must file electronically.
Wednesday, March 31, 2027in 273 daysWho it applies to
Applicable Large Employers (50+ full-time and FTE employees). Filers of 10 or more information returns in aggregate must file electronically.
If you miss it
Failure to file complete, accurate returns on time can trigger IRS penalties per return under IRC §6721, indexed annually, with no cap for intentional disregard.
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Last verified Saturday, June 13, 2026 · General information for employers and HR teams, not legal advice.
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