C corporation: Form 1120 - extended filing (30 Sep 2026 year-end)
Tax year ended 30 Sep 2026. A timely, valid filing extension is required. 6-month extension; Form 7004.
Tax Due Dates Calendar
Selected U.S. federal tax filing, payment and reporting dates for October 2026 through December 2027.
Dates depend on tax year, entity, filing extensions and deposit schedule. Filing extensions generally do not extend payment deadlines. Check current IRS tax calendar guidance and any relief that applies to you.
| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
|---|---|---|---|---|---|---|
| C corporation: Form 1120 - extended filing (30 Sep 2026 year-end)C corporation: Form 1120 - filing (31 Mar 2027 year-end)Estate / trust: Form 1041 + K-1 - filing (31 Mar 2027 year-end) +1 more events on July 15 | ||||||
Dates in July
4 datesC corporation: Form 1120 - filing (31 Mar 2027 year-end)
Tax year ended 31 Mar 2027. 15th of 4th month.
Estate / trust: Form 1041 + K-1 - filing (31 Mar 2027 year-end)
Tax year ended 31 Mar 2027. 15th of 4th month. Fiscal-year Form 1041 generally applies to decedents' estates; most trusts use a calendar year.
Monthly payroll tax deposit - Jun 2027 wages
For monthly schedule depositors: federal employment taxes on wages paid in Jun 2027. Semiweekly and $100,000 next-day rules can require earlier deposits. See IRS Publication 15.
