Important Federal Filing & Extension Deadlines
Understanding tax deadlines is essential for avoiding penalties and staying compliant. Below are the most important federal tax due dates for individuals and businesses.
If you are unsure which deadlines apply to you, our professional guidance can help clarify your obligations.
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Individual Tax Deadlines
April 15, 2026
Federal income tax returns due for most individuals. This deadline applies to:
- Single filers
- Married filing jointly
- Married filing separately
- Head of household
If April 15 falls on a weekend or holiday, the deadline may shift to the next business day.
October 15, 2026
Extended deadline for individuals who filed a tax extension.
Business Tax Deadlines
March 15, 2026
Deadline for:
- S Corporations
- Partnerships
April 15, 2026
Deadline for:
- C Corporations
- Sole Proprietors (filed with individual returns)
September 15, 2026
Extended deadline for:
- S Corporations
- Partnerships
October 15, 2026
Extended deadline for:
- C Corporations (if extension filed)
- Individual returns with extension
Estimated Quarterly Tax Payments
Certain individuals and businesses must make quarterly estimated tax payments. Typical estimated tax deadlines:
April 15
June 15
September 15
January 15 (following year)
If you're unsure whether estimated payments apply to you, we recommend speaking with one of our experienced tax professionals.
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Avoiding Late Filing Penalties
Missing tax deadlines may result in:
Late filing penalties
Late payment penalties
Interest on unpaid balances
Planning ahead helps prevent unnecessary costs and stress.