What dates are the Federal Quarterly Forms 941 filed by?

The Employer's Quarterly Federal Tax Return (Form 941) for the 1st period January-March is due by April 30. The Employer's Quarterly Federal Tax Return (Form 941) for the 2nd period April-June is due by July 31. The Employer's Quarterly Federal Tax Return (Form 941) for the 3rd period July-September is due by October 31. The Employer's Quarterly Federal Tax Return (Form 941) for the 4th period October- December is due by January 31st. If all the taxes were timely deposited for the current quarter, then the due date is extended 10 more days. If the 941 reports are not filed timely, there is a late filing penalty. There is also a penalty for late paying with associated interest on the balance due.