Form 941 filing deadlines fall on the last day of the month after each calendar quarter: April 30, July 31, October 31, and January 31. If you deposited every dollar of federal income tax, Social Security, and Medicare tax on time during the quarter, you get an extra ten calendar days to file. Miss the filing deadline and the failure-to-file penalty starts at 5% of the unpaid tax per month; miss a deposit deadline and a separate penalty of 2% to 15% applies to the shortfall.
The Four Quarterly Due Dates
Any employer paying wages subject to federal income tax withholding or to Social Security and Medicare taxes files Form 941 once per quarter.
- Quarter 1 (January through March): file by April 30
- Quarter 2 (April through June): file by July 31
- Quarter 3 (July through September): file by October 31
- Quarter 4 (October through December): file by January 31 of the following year
When any of these dates falls on a Saturday, Sunday, or federal holiday, the deadline moves to the next business day.1Internal Revenue Service. Instructions for Form 941 (Rev. March 2026)
The Ten-Day Extension for Timely Depositors
If every required deposit for the quarter went in on schedule, the filing deadline shifts by ten calendar days:
- Quarter 1: May 10 instead of April 30
- Quarter 2: August 10 instead of July 31
- Quarter 3: November 10 instead of October 31
- Quarter 4: February 10 instead of January 31
The extension covers filing only. It does not push back any deposit due date, and a single late deposit during the quarter forfeits it.2Internal Revenue Service. Employment Tax Due Dates
Deposit Deadlines Behind the Filing Deadlines
Because deposit timing controls whether you get the ten-day extension, and because late deposits carry their own penalty, the deposit schedule matters as much as the filing date. The IRS assigns your schedule from a lookback period: the 12 months starting July 1 of two years ago through June 30 of last year.
Monthly Depositors
If you reported $50,000 or less in employment taxes during the lookback period, you deposit each month’s taxes by the 15th of the following month. New employers start here automatically because the IRS treats their lookback-period taxes as zero.3Internal Revenue Service. Topic No. 757, Forms 941 and 944 – Deposit Requirements
Semiweekly Depositors
If you reported more than $50,000, deposit timing depends on your payday:
- Payday on Wednesday, Thursday, or Friday: deposit by the following Wednesday
- Payday on Saturday, Sunday, Monday, or Tuesday: deposit by the following Friday
These rules always leave at least three business days between payday and the deposit deadline.2Internal Revenue Service. Employment Tax Due Dates
The $100,000 Next-Day Rule
Regardless of your regular schedule, accumulating $100,000 or more in employment taxes on any single day requires a deposit by the next business day. Triggering this rule also converts you to a semiweekly depositor for the rest of the current calendar year and the following year.3Internal Revenue Service. Topic No. 757, Forms 941 and 944 – Deposit Requirements
All federal tax deposits must go through the Electronic Federal Tax Payment System (EFTPS), your IRS business tax account, or IRS Direct Pay for businesses. Mailing a check to the IRS instead of depositing electronically can trigger a penalty on its own.3Internal Revenue Service. Topic No. 757, Forms 941 and 944 – Deposit Requirements
What Filing Late Costs
Filing Form 941 after the deadline triggers a failure-to-file penalty of 5% of the unpaid tax for each month or partial month the return is late, capped at 25%. File more than 60 days late and you will generally owe the lesser of the tax due or a minimum fixed penalty.4Internal Revenue Service. Failure to File Penalty
The penalty is calculated on unpaid tax only. Taxes you already deposited on time shrink the base. If you deposited everything and simply filed the return late, the penalty applies to whatever small balance remained, which may be zero or close to it.
What Depositing Late Costs
Late deposits carry their own penalty, calculated as a percentage of what you should have deposited. The rate climbs the longer the money sits:
- 1 to 5 calendar days late: 2%
- 6 to 15 calendar days late: 5%
- More than 15 calendar days late: 10%
- More than 10 days after your first IRS notice, or on a demand for immediate payment: 15%
These tiers do not stack. A deposit 15 days late owes 10%, not 2% plus 5% plus 10%.5Internal Revenue Service. Failure to Deposit Penalty The IRS may waive the penalty for first-time depositors who inadvertently miss a deadline, provided the return itself was filed on time.6Office of the Law Revision Counsel. 26 U.S. Code 6656 – Failure to Make Deposit of Taxes
Personal Exposure for Unpaid Trust Fund Taxes
Federal income tax and the employee share of Social Security and Medicare taxes are trust fund taxes: money you withhold from employees and hold for the government. If those taxes go unpaid, the IRS can pursue the individuals responsible, not just the business. The trust fund recovery penalty equals 100% of the unpaid trust fund taxes and applies to any person who was responsible for collecting and paying them over and who willfully failed to do so.7Office of the Law Revision Counsel. 26 U.S. Code 6672 – Failure to Collect and Pay Over Tax, or Attempt to Evade or Defeat Tax
A responsible person is anyone with authority over which creditors get paid. That includes officers, directors, shareholders with financial control, partners, and bookkeepers or payroll service providers who direct how funds are disbursed. Willful does not require bad intent. The IRS treats it as willful if you knew the taxes were due and chose to pay other bills first.8Internal Revenue Service. Employment Taxes and the Trust Fund Recovery Penalty (TFRP) The penalty is personal and bypasses the corporate structure, so the IRS can go after individual bank accounts, wages, and property.
When Form 941 Is Not the Right Form
Small Employers on Annual Filing
If your total annual liability for Social Security, Medicare, and withheld federal income tax is $1,000 or less, you may qualify to file Form 944 once a year instead of Form 941 every quarter. As a general guideline, employers paying $5,000 or less in total wages during the year typically fall below the $1,000 threshold.9Internal Revenue Service. Instructions for Form 944 (2025)
You cannot switch on your own. The IRS must notify you that you’re eligible, or you must request the change. To request a switch in either direction, call the IRS by April 1 of the current year or mail a written request postmarked by March 15.10Internal Revenue Service. Certain Taxpayers May File Their Employment Taxes Annually If your liability grows past $1,000 mid-year while you’re assigned to Form 944, contact the IRS to move back to quarterly filing. The wrong form can generate delinquency notices for quarters the IRS expected a return.
Final Returns When You Close
When you permanently stop paying wages, file a final Form 941 for the quarter of the last payment. Check the box on line 17 and enter the date wages were last paid, and attach a statement with the name and address of the person keeping your payroll records.11Internal Revenue Service. Closing a Business Skipping this step leaves your account open and the IRS will keep expecting quarterly returns.
Seasonal Employers
If you only hire during certain parts of the year, check the seasonal employer box on line 18 to tell the IRS not to expect four returns annually. You must check the box on every Form 941 you file, not just the first one. Forget once and the IRS may treat the skipped quarter as delinquent.12Internal Revenue Service. Instructions for Form 941 (03/2026)
Fixing a Return You Already Filed
If you discover an error on a filed Form 941, whether you underreported or overreported, correct it with Form 941-X. File a separate 941-X for each quarter and do not attach it to a current Form 941.
Two correction methods are available. Use the adjustment process when you underreported taxes and owe more, when you overreported and want to apply the credit to a future Form 941, or when you need to correct both underreported and overreported amounts on the same form. Use the claim process when you only overreported and want a refund or abatement.
For underreported taxes, the 941-X is due by the end of the quarter in which you discover the error, following the same April 30, July 31, October 31, and January 31 schedule. For overreported taxes, you generally have three years from the date you filed the original Form 941 or two years from the date you paid the tax, whichever is later.13Internal Revenue Service. Instructions for Form 941-X (04/2025)