Guides

Plain-English explanations of 2026 self-employment tax rules, each reviewed and linked to a calculator.

• January 15, 2027: Your Last 2026 Estimated Tax Payment (Q4) as a Self-Employed WorkerThe fourth 2026 estimated tax payment is due January 15, 2027. Who must pay, safe harbor rules, the file-early option and how to pay.Last reviewed October 30, 2026