Seasonal Deadlines

A quarterly tax payments guide for small business owners. Learn who pays, how to estimate, due dates, and how to avoid IRS penalties.

This small business estimated tax guide explains who must pay, how to calculate quarterly payments, and how to avoid IRS penalties.

Know the small business tax filing deadline 2026, key due dates by entity type, extensions, and how to avoid penalties with better planning.

Tax season can feel overwhelming, but filing on time delivers real financial benefits — especially if you're expecting a refund. More importantly, with the IRS increasingly leveraging artificial intelligence to detect unfiled returns and close the tax gap, procrastination carries higher risks than ever before. Why Filing on Time Matters. Missing the tax deadline (typically mid-April) triggers two main penalties that can add up quickly: Failure-to-File Penalty: Generally, 5% o