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2026 Tax Calendar

Deadlines, extensions, and estimated tax payments.

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).