Partnership / S corp: 1065 / 1120-S + K-1 - filing (30 Jun 2027 year-end)
Tax year ended 30 Jun 2027. 15th of 3rd month.
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 |
|---|---|---|---|---|---|---|
| Partnership / S corp: 1065 / 1120-S + K-1 - filing (30 Jun 2027 year-end)Partnership / S corp: 1065 / 1120-S + K-1 - extended filing (31 Dec 2026 year-end)Individuals / C corps: Estimated income tax - Pay #3 (Tax year 2027) +1 more events on September 15 | ||||||
| Estate / trust: Form 1041 + K-1 - extended filing (31 Dec 2026 year-end) |
Dates in September
5 datesPartnership / S corp: 1065 / 1120-S + K-1 - extended filing (31 Dec 2026 year-end)
Tax year ended 31 Dec 2026. A timely, valid filing extension is required. 6-month extension; Form 7004.
Individuals / C corps: Estimated income tax - Pay #3 (Tax year 2027)
Period: Tax year 2027. Individual 1040-ES + C-corp installment #3.
Monthly payroll tax deposit - Aug 2027 wages
For monthly schedule depositors: federal employment taxes on wages paid in Aug 2027. Semiweekly and $100,000 next-day rules can require earlier deposits. See IRS Publication 15.
Estate / trust: Form 1041 + K-1 - extended filing (31 Dec 2026 year-end)
Tax year ended 31 Dec 2026. A timely, valid filing extension is required. 5.5-month extension; Form 7004.
