Staying ahead of tax deadlines can help you avoid penalties and unnecessary stress. Below are the key tax deadlines for the 2026 filing season (for 2025 tax returns).
Individual Taxpayers
- April 15, 2026 – Individual tax return due (Form 1040)
- October 15, 2026 – Extended return due (with timely extension filed)
Business Tax Deadlines
- March 15, 2026 –
- S-Corporation (Form 1120-S)
- Partnerships (Form 1065)
- September 15, 2026 – Extended deadline for S-Corps and partnerships
Estimated Tax Payments (Individuals & Businesses)
- April 15, June 15, September 15, 2025
- January 15, 2026
S-Corp Reminder: Missing the March 15 deadline can result in penalties per shareholder, per month. Early preparation is key.
