KEY 2025 TAX DUE DATES for Individuals & Businesses in the U.S.:
Individuals (Form 1040)
*April 15, 2025 – Tax Day! Individual income tax returns (Form 1040) for 2024 and Q1 2025 estimated tax payments are due.
Extension deadline: File Form 4868 for a six-month extension (new due date: October 15, 2025).
**June 16, 2025 – Q2 2025 estimated tax payment due.
**September 15, 2025 – Q3 2025 estimated tax payment due.
**October 15, 2025 – Extended deadline for filing 2024 individual tax returns (Form 1040).
**January 15, 2026 – Q4 2025 estimated tax payment due.
Businesses:
*March 17, 2025 – Tax returns due for S-Corps (Form 1120-S) and *Partnerships (Form 1065).
**Extension deadline: File Form 7004 for a six-month extension (new due date: September 15, 2025).
**April 15, 2025 – Tax returns due for C-Corps (Form 1120) and Q1 2025 estimated tax payments.
**Extension deadline: File Form 7004 to extend to October 15, 2025.
**June 16, 2025 – Q2 2025 estimated tax payment due.
**September 15, 2025 – Extended deadline for S-Corps and Partnerships and **Q3 2025 estimated tax payment due.
**October 15, 2025 – Extended deadline for C-Corp tax returns.
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