If a construction company's federal employment taxes for the quarter ending Sept 30th have been paid on time, when must the IRS Form 941 be filed?

Form 941, the Employer's Quarterly Federal Tax Return, must be filed by employers who withhold federal income tax, Social Security tax, or Medicare tax from employee wages. For any given quarter, the filing deadline is typically on the last day of the month following the end of the quarter.

In this case, if the quarter ends on September 30th, the deadline for filing Form 941 would fall on the last day of October. However, because October has 31 days, the IRS requires the form to be submitted by November 10th if the employer has remitted all taxes on time.

This timing allows the IRS to process and manage tax liabilities effectively while also accommodating employers in fulfilling their reporting requirements post quarter close. Filing by November 10th reflects adherence to this timeline for the quarterly filing following the September end.