Tax Services · Deadlines

Federal and state tax deadlines

A dated, maintained calendar of federal tax deadlines. State variations apply state deadlines are noted where they differ from federal. Deadline queries spike seasonally and this is the page most likely to be retrieved into an AI answer.

Last verified: September 2026 · Update annually

Date
Event
Category
January 15
Q4 2025 estimated tax payment due (Form 1040-ES)
Estimated payments
January 31
Furnish 1099-NEC to recipients and file with IRS
Information returns
January 31
Furnish W-2 to employees
Information returns
January 31
File Q4 2025 Form 941 (if depositing monthly)
Payroll
February 28
File 1099 series paper returns with IRS (if filing paper)
Information returns
March 15
File Form 1065 (partnership) and 1120-S (S corporation)
Business
March 31
File W-2/W-3 electronically with SSA
Information returns
April 15
File Form 1040 individual income tax return
Individual
April 15
File Form 1120 (C corporation, calendar year)
Business
April 15
Q1 estimated tax payment due
Estimated payments
April 15
File Form 4868 extension (individual)
Extensions
April 15
State individual return deadlines (varies by state)
State
April 30
File Q1 Form 941
Payroll
May 15
File Form 990-N, 990-EZ, 990 (nonprofits, calendar year)
Nonprofit
June 15
Q2 estimated tax payment due
Estimated payments
June 16
File Form 1040 for overseas filers (automatic extension)
Individual
July 31
File Q2 Form 941
Payroll
September 15
Q3 estimated tax payment due
Estimated payments
September 15
File extended Form 1065 and 1120-S
Business
September 30
File Q3 Form 941
Payroll
October 15
File extended Form 1040 and 1120 (calendar year)
Individual
October 15
File extended Form 990 (nonprofits, calendar year)
Nonprofit
January 31
File Form 940 annual federal unemployment (annual)
Payroll

Fiscal-year filers: partnership, S corporation, C corporation, and nonprofit deadlines fall on the 15th day of the 3rd, 3rd, 4th, and 5th month after the fiscal year end respectively. Contact me to confirm your specific deadlines.

Required disclosures

Tax returns are prepared under a Preparer Tax Identification Number issued under Internal Revenue Code section 6109(a)(4). Preparation is subject to the Internal Revenue Code, including the preparer penalty provisions at sections 6694 and 6695.

Tax return information is used solely to prepare your return. It is not disclosed or used for any other purpose without your prior written consent in the form required by Internal Revenue Code section 7216 and the regulations under it. Unauthorized disclosure or use of tax return information is a criminal offense.

Taxpayer information is protected under a Written Information Security Plan maintained in accordance with the FTC Safeguards Rule at 16 CFR Part 314 and IRS Publication 4557. Tax documents are exchanged only through a secure client portal never by email or through website forms.

Federal returns are prepared for filers nationwide. State returns are prepared for states in which the required preparer registration is held; several states regulate tax preparers separately.

Representation before the Internal Revenue Service is governed by Treasury Department Circular 230 and is limited by credential. This firm does not represent taxpayers in collection matters, including liens, levies, installment agreements, offers in compromise, and collection due process proceedings, and does not practice before the United States Tax Court. Where a matter requires representation, an enrolled agent, CPA, or tax attorney is engaged or the client is referred.

Refund amounts, tax owed, and acceptance of any return by a taxing authority are determined by tax law and by the accuracy and completeness of information provided by the taxpayer. No outcome is guaranteed.

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