Form 941: Quarterly Employer Tax Return
Quarterly federal payroll tax return for employers with W-2 employees. Reports Social Security, Medicare and federal income tax withholding. Due last day of month following quarter end. Semiweekly depositors also file Schedule B (Form 941) with each return to show their daily tax liability.
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Who this applies to
- Employers with W-2 employees (including S-corp owner-employees)
- All wages subject to FICA and federal income tax withholding
What to file
Form 941 reporting wages, FICA taxes, federal income tax withheld, COBRA premium assistance (if applicable), and reconciling deposits made.
How to file
E-file through authorized e-file provider (most payroll software). Paper filing accepted with limitations.
Payment due
Federal payroll taxes are deposited via EFTPS on a semi-weekly or monthly schedule based on prior-year tax liability. The 941 reconciles deposits. Additional liability may be due with the return. An employer is a semiweekly depositor if it reported more than $50,000 of employment taxes in the lookback period, or if it accumulates $100,000 or more on any day. The $100,000 amount must be deposited by the next business day. Others deposit monthly. The 2026 Social Security wage base is $184,500, with 6.2% each for employer and employee, and Medicare is 1.45% each with no wage base limit.
Penalties for missing this deadline
Late filing: 5% per month (max 25%) of unpaid tax. Late deposit (much more common): 2% (1–5 days late), 5% (6–15 days), 10% (16+ days), 15% (after IRS demand). Trust Fund Recovery Penalty makes responsible persons personally liable for unpaid employee withholding. The failure to deposit penalties do not stack: it is 2% for 1 to 5 days late, 5% for 6 to 15 days late and 10% for more than 15 days, and 15% if the amount is still unpaid more than 10 days after the first IRS notice. No penalty applies when the failure was due to reasonable cause.
Filing checklist
- Aggregate quarterly wages, FICA, federal withholding from payroll system
- Reconcile deposits made via EFTPS
- Calculate any quarterly liability shortfall
- File Form 941 electronically by last day of next month
- Pay any balance via EFTPS
- File Schedule B (Form 941) if the business is a semiweekly depositor
Documents you'll need
- Payroll registers for the quarter
- Records of EFTPS deposits and dates
- Form W-4 for each employee
- Form 8974 if a qualified small business claims the payroll tax credit for increasing research activities
Common mistakes to avoid
- Missing the deposit schedule (semi-weekly for larger employers)
- Not depositing same-day for $100,000+ accumulated liability
- Forgetting to file even if wages are zero (must file Form 941 unless filed final)
- Misclassifying contractors as employees (or vice versa)
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