RR Tax Services

Tax deadlines for filing 2025 Taxes

(Last updated on: 01/12/2026)

You are entering the "filing season" for the income you earned during the 2025 calendar year.

For both Federal (IRS) and California (FTB), the tax deadlines generally fall on the same dates, but there are specific differences for business structures like S-Corps and Partnerships.

2025 Tax Year Deadlines (Filing in 2026)

Entity Type	Return Due Date	Extended Deadline	Key Form(s)
Individuals	April 15, 2026	Oct 15, 2026	IRS 1040 / CA 540
S-Corporations	March 16, 2026*	Sept 15, 2026	IRS 1120-S / CA 100S
Partnerships / LLCs	March 16, 2026*	Sept 15, 2026	IRS 1065 / CA 565 or 568
C-Corporations	April 15, 2026	Oct 15, 2026	IRS 1120 / CA 100
Sole Proprietors	April 15, 2026	Oct 15, 2026	IRS 1040 (Sch C) / CA 540

*Note: March 15 falls on a Sunday in 2026, so the deadline moves to the next business day, Monday, March 16.

Important Dates for Individual Taxpayers

January 15, 2026: Deadline for the 4th quarter estimated tax payment for 2025 income.
January 26, 2026: IRS officially begins accepting and processing 2025 federal tax returns.
February 2, 2026: Deadline for employers to send W-2s and for businesses to send most 1099 forms to you.
April 1, 2026: Deadline to take your first Required Minimum Distribution (RMD) if you turned 73 in 2025.
April 15, 2026: * Final Filing Deadline: Last day to file or request an extension.

Payment Deadline: Even if you file an extension, any tax owed is due today to avoid interest.
Contribution Deadline: Last day to contribute to an IRA or HSA for the 2025 tax year.

October 15, 2026: Final deadline to file if you received a 6-month extension.

California-Specific Notes (FTB)

Automatic Extension: California grants an automatic 6-month extension to file (until October 15) for individuals. You do not need to file a form to get this, but you must still pay any tax owed by April 15 to avoid penalties.
LLC Fee: If you have a California LLC, the $800 annual franchise tax for 2026 is also due by April 15, 2026.
Disaster Relief: If you are in a county recently declared a disaster area by the Governor or President, your deadlines may be further postponed. (Currently, parts of Southern California affected by January 2025 fires had extended deadlines, so check the FTB website if you are in a high-impact area).

Tax laws are increasingly complex, and the impact of these changes varies widely depending on income level, filing status, state of residence, and business activity.

How We Can Help

Our firm stays up to date on federal and state tax law changes to help clients:

Minimize tax liability
Stay compliant
Make informed financial decisions

Whether you are an individual taxpayer, retiree, or business owner, we can help you understand how the 2025 tax changes affect your specific situation.

Contact us today to schedule a tax planning consultation.

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Tax deadlines for filing 2025 Taxes

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