10/12/2026
October 15 Filing Extension Deadlines
Taxpayers who timely requested an extension to file their 2025 federal income tax returns generally must file by Thursday, October 15, 2026. The same deadline generally applies to calendar-year C corporations that received an extension to file their 2025 corporate returns (Form 1120).
In addition, U.S. persons with a financial interest in or signature authority over foreign financial accounts whose combined value exceeded $10,000 at any time during 2025, and who are required to file a Report of Foreign Bank and Financial Accounts (FBAR), generally must file by October 15, 2026. The FBAR extension is automatic; no extension request is necessary.