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Tax Calendar

Key federal filing deadlines for the 2025 tax year, quarterly estimated payments through early 2027, and extension due dates.

These dates reflect standard federal deadlines for the 2025 tax year (filed in 2026) and estimated payment dates through early 2027, based on published IRS guidance current as of August 2026. Deadlines can shift for weekends, holidays, disaster relief, or your specific entity type — always confirm your exact due date with our office rather than relying solely on this page.
Individuals
DateWhat's due
Jan 26, 2026IRS begins accepting 2025 individual tax returns
Apr 15, 20262025 individual returns (Form 1040) due, or file for a 6-month extension (Form 4868)
Jun 15, 20262025 return deadline for US citizens and resident aliens living and working outside the US
Oct 15, 2026Extended deadline for 2025 individual returns filed on extension
Businesses
DateWhat's due
Feb 2, 2026Deadline for employers to furnish W-2s to employees and 1099-NECs to contractors
Mar 16, 20262025 Partnership (Form 1065) and S-Corp (Form 1120-S) returns due, or file for extension
Apr 15, 20262025 C-Corp returns (Form 1120) due, or file for extension (Form 7004)
Sep 15, 2026Extended deadline for 2025 Partnership and S-Corp returns filed on extension
Oct 15, 2026Extended deadline for 2025 C-Corp returns filed on extension
Trusts & Estates
DateWhat's due
Apr 15, 20262025 Trust and Estate returns (Form 1041) due, or file for extension
Non-Profits
DateWhat's due
May 15, 2026Form 990 due for calendar-year tax-exempt organizations, or file for extension
Nov 16, 2026Extended Form 990 deadline for calendar-year organizations filed on extension
Quarterly Estimated Tax Payments
DateWhat's due
Jan 15, 2026Q4 2025 estimated tax payment
Apr 15, 2026Q1 2026 estimated tax payment
Jun 15, 2026Q2 2026 estimated tax payment
Sep 15, 2026Q3 2026 estimated tax payment
Jan 15, 2027Q4 2026 estimated tax payment

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