This is a concise, visual guide to U.S. tax deadlines for the 2026 filing year, designed to help individuals and business owners stay organized, compliant, and ahead of penalties.

It lays out clear timelines for personal taxpayers, sole proprietors, and corporations, highlighting key filing dates, estimated tax payments, extensions, and ongoing obligations so tax responsibilities can be planned across the year rather than handled under last-minute pressure.

And if you decide you’d rather work with a team that already meets these standards, you can learn more about how we support business owners from A to Z, at AZ Accounting.