Jan 15, 2026
PAYMENT DUE
Q4 2025 Estimated Tax Due
Final estimated tax payment (Form 1040-ES) for income earned Sept 1 – Dec 31, 2025.
Jan 29, 2026
Filing Season Opens
The IRS begins accepting and processing individual tax returns.
Jan 31, 2026
Deadline for W-2s & 1099s
Employers and businesses must mail your W-2 and 1099 forms by this date.
Apr 15, 2026
CRITICAL
TAX DAY (Filing Deadline)
Form 1040 due. Deadline to pay any tax owed to avoid penalties. Last day to file Form 4868 for an automatic extension.
Apr 15, 2026
PAYMENT DUE
Q1 2026 Estimated Tax Due
First estimated tax payment (Form 1040-ES) for 2026 income (Jan 1 – Mar 31).
Jun 15, 2026
PAYMENT DUE
Q2 2026 Estimated Tax Due
Second estimated tax payment for 2026 income (Apr 1 – May 31).
Sep 15, 2026
PAYMENT DUE
Q3 2026 Estimated Tax Due
Third estimated tax payment for 2026 income (Jun 1 – Aug 31).
Oct 15, 2026
DEADLINE
Extension Filing Deadline
Final deadline to file your 2025 tax return if you requested an extension. (Taxes owed were due in April).
Jan 15, 2027
PAYMENT DUE
Q4 2026 Estimated Tax Due
Final estimated tax payment for 2026 income (Sept 1 – Dec 31).