By Lucas Corporate Services · Published 2026-10-13T12:32:07Z
Updated 2026-10-13T12:40:40Z · Information as of 2026-10-13T12:29:04Z
If your corporation timely obtained a six-month extension for its 2025 calendar-year Form 1120, the return is generally due Thursday, October 15, 2026. Confirm readiness with your tax preparer, resolve missing information and retain filing confirmation. The extension generally did not extend the payment deadline. Other tax classifications, fiscal years and qualifying disaster relief may have different deadlines.
Sources
- https://www.irs.gov/businesses/small-businesses-self-employed/fourth-quarter-tax-calendar
- https://www.irs.gov/instructions/i7004
Updates and corrections
- : Display correction: the alert stays active through October 15 in U.S. time zones and expires October 16 at 11:00 UTC. This display cutoff is not a filing deadline.