2026 Tax Calendar & Deadlines | Free Guide

Stay compliant and avoid penalties with this comprehensive calendar of all federal and state tax deadlines for 2026. Whether you're a small business owner, freelancer, or property investor, missing a tax deadline can result in costly penalties and interest charges.

Important: This calendar covers the most common federal deadlines. State deadlines may vary. Always consult with your CPA for specific requirements.

Q1 2026 - January to March

January 15, 2026

Q4 2025 Estimated Tax Payment Due (Form 1040-ES)

Individuals & Sole Proprietors

January 31, 2026

Form W-2 and 1099 Distribution Deadline

All Employers

February 28, 2026

Paper Filing Deadline for Forms 1099, W-2, W-3

All Businesses

March 16, 2026

S-Corporation and Partnership Tax Return Due (Form 1120-S, 1065)

S-Corps & Partnerships

Q2 2026 - April to June

April 15, 2026

Individual Income Tax Return Due (Form 1040) & Q1 2026 Estimated Tax Payment

CRITICAL DEADLINE

June 15, 2026

Q2 2026 Estimated Tax Payment Due (Form 1040-ES)

Individuals & Sole Proprietors

Q3 2026 - July to September

September 15, 2026

Q3 2026 Estimated Tax Payment Due (Form 1040-ES) & Extended S-Corp/Partnership Returns Due

Individuals & Extended Filers

Q4 2026 - October to December

October 15, 2026

Extended Individual Income Tax Return Due (Form 1040)

FINAL DEADLINE

Quarterly Payroll Tax Deadlines

January 31: Form 941 (Q4 2025)

April 30: Form 941 (Q1 2026)

July 31: Form 941 (Q2 2026)

October 31: Form 941 (Q3 2026)

Pro Tip: Set calendar reminders 2 weeks before each deadline to gather necessary documents and avoid last-minute stress. Consider working with Synergy Pro CPA for year-round tax planning and compliance support.

2026 Tax Calendar for US Small Businesses