IRS Tax Deadlines 2026

December 2024

Partnerships – Multi-member LLCs : March 16, 2026

S Corporations : March 16, 2026

Individuals : April 15, 2026

Corporations – Single-member LLC – Schedule C : April 15, 2026

2024 Estimated Tax Deadlines :

January 15, 2025 – 2024 Q4

April 15, 2025 – 2026 Q1
June 16, 2025 – 2026 Q2
September 15, 2026 – 2026 Q3
January 15, 2026 – 2027 Q4

2026 Extension Tax Deadlines 

Partnerships/S Corporations : September 15, 2026
Individuals/Corporations : October 15, 2026