Tax Filing Deadline 2025

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Meta Description: The federal tax filing deadline for 2025 is April 15, 2026. Missed it? File Form 4868 for an extension or face penalties. Full 2025-2026 tax calendar inside.

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H1

Tax Filing Deadline 2025: Key Dates and What to Do If You Miss It

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ANSWER SECTION

The federal tax filing deadline for 2025 income is April 15, 2026. If you cannot file by this date, submit Form 4868 by April 15 to get an automatic 6-month extension until October 15, 2026. An extension gives you more time to file, NOT more time to pay — estimated taxes are still due April 15.

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H2: When Is the 2025 Tax Filing Deadline?

The standard federal income tax filing deadline is April 15 of the year following the tax year. For 2025 income reported in 2026, this falls on Wednesday, April 15, 2026.

If April 15 falls on a Saturday, Sunday, or federal holiday, the deadline shifts to the next business day. In 2026, April 15 is a Wednesday, so the deadline remains April 15.

Key Form: Form 1040 (U.S. Individual Income Tax Return)

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H2: How to File for an Extension

If you cannot file by April 15, file Form 4868 (Application for Automatic Extension of Time to File U.S. Individual Income Tax Return) by the original deadline.

Form 4868 gives you an automatic 6-month extension to October 15, 2026. No reason required — the extension is automatic upon filing.

Critical distinction: An extension extends your filing deadline, NOT your payment deadline. If you owe taxes, you must estimate and pay the amount due by April 15 to avoid failure-to-pay penalties.

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H2: Penalties for Missing the Deadline

Two separate penalties apply if you miss the tax deadline:

Failure-to-File Penalty: 5% of unpaid taxes per month (or part of month) up to 25% maximum. Starts the day after the deadline.

Failure-to-Pay Penalty: 0.5% of unpaid taxes per month (or part of month) up to 25% maximum.

If both apply in the same month, the failure-to-file penalty is reduced by the failure-to-pay penalty (effectively 4.5% + 0.5% = 5% total).

Minimum penalty: If you file more than 60 days late, the minimum penalty is the lesser of $485 (for 2025 tax year) or 100% of unpaid tax.

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H2: State Tax Deadline Variations

While most states follow the federal April 15 deadline, some differ:

California: Follows federal deadline (April 15, 2026). Extensions also mirror federal extensions using Form 4868.

Maine and Massachusetts: Deadline is April 15, but if Patriot's Day (April 20) affects processing, check state-specific guidance.

Emancipation Day (Washington D.C.): If April 15 falls within Emancipation Day observance, the federal deadline may shift, and some states follow that shift.

Always verify your specific state's deadline at your state tax authority's website.

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H2: What If You're Due a Refund?

If you are due a refund, there is no penalty for filing late. The failure-to-file and failure-to-pay penalties only apply when you owe taxes.

However, you must file within 3 years of the original deadline to claim your refund. After 3 years, the refund becomes property of the U.S. Treasury.

Recommendation: File even if you cannot pay. The failure-to-file penalty (5% monthly) is 10x larger than the failure-to-pay penalty (0.5% monthly).

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H2: Related Tax Questions

For more information about tax deadlines and filing requirements, see our guide to the deadline to file taxes in 2025 — covering state variations and special circumstances.

If you need a complete calendar of all important tax dates throughout the year, visit our important tax dates and deadlines page with quarterly estimated tax due dates and other key deadlines.

For questions about estimated tax penalties if you missed quarterly payments, see our guide on the penalty for underpayment of estimated tax.

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