US payroll deadlines and the employer calendar
Reviewed by Mellow Editorial Team, HR & payroll content team
US payroll compliance runs on fixed deadlines. Miss one and you face penalties, interest charges, and possible audit flags — so knowing the exact dates matters more than understanding the tax mechanics.
The core filing obligations
Three forms drive most of the federal payroll calendar.
Form 941 is your quarterly payroll tax return. It summarizes the federal income tax, Social Security, and Medicare (FICA) you withheld from employees, plus your matching employer share. You file it four times a year, and the due dates fall on the last day of the month following each quarter-end: April 30, July 31, October 31, and January 31. If you deposited all taxes on time throughout the quarter, the IRS gives you an extra ten days.
Form W-2 goes to every employee who received wages during the year. The deadline is January 31 — both to get the form into the employee's hands and to file copies with the Social Security Administration. There is no grace period here for most employers.
Form 1099-NEC covers non-employee compensation. If you paid an independent contractor $600 or more during the year, you must send them a 1099-NEC and file a copy with the IRS, also by January 31.
January 31 is therefore your single busiest payroll deadline of the year. W-2s, 1099-NECs, and the Q4 Form 941 all land on the same date.
Federal tax deposit schedules
Filing a return and depositing the taxes are two separate obligations. The IRS assigns each employer a deposit schedule — either monthly or semi-weekly — based on your total tax liability during a lookback period (generally the prior four quarters).
Under the monthly schedule, you deposit all taxes withheld in a given month by the 15th of the following month.
Under the semi-weekly schedule, deposits follow the payroll date: wages paid on Wednesday, Thursday, or Friday are due the following Wednesday; wages paid on Saturday, Sunday, Monday, or Tuesday are due the following Friday.
One rule overrides both schedules: if you accumulate $100,000 or more in tax liability on any single day, you must deposit by the next business day regardless of your assigned schedule.
Most small employers start on the monthly schedule. As payroll grows, the IRS may move you to semi-weekly. Check your IRS notice or your tax professional's guidance each November, when the IRS announces schedule assignments for the coming year.
State and local payroll deadlines
State filing calendars vary significantly, and some states add complexity that federal requirements do not.
States with no income tax — including Texas, Florida, and Washington — remove one layer of withholding, but you still have state unemployment insurance (SUI) obligations with their own quarterly filing dates.
States with income tax typically require quarterly or monthly withholding deposits and their own annual reconciliation returns. Many align loosely with the federal quarterly calendar, but the exact due dates and thresholds differ. California, for example, has its own deposit schedules tied to payroll frequency and liability amounts, plus strict rules around contractor classification.
If you operate in multiple states, map out each state's specific calendar separately. A single payroll run can trigger obligations in two or three jurisdictions simultaneously.
New hire reporting
Beyond tax filings, federal law requires you to report every new hire to your state's designated agency, generally within 20 days of the hire date (some states set tighter windows). The state then forwards the data to the National Directory of New Hires, which is used to enforce child support orders and detect benefit fraud.
This is often overlooked in payroll planning because it does not involve a dollar amount — but non-compliance can draw state penalties.
Building your employer calendar
A practical approach is to work backward from each deadline and set internal action dates.
For Form 941, plan to have payroll records reconciled at least two weeks before the filing deadline, not the day before. For W-2s and 1099-NECs, a mid-December review of all contractor payments and employee records gives you time to catch discrepancies before the January 31 crunch.
For deposit deadlines — especially semi-weekly — the margin for error is narrow. Automated payroll systems flag deposit dates in advance, but if you are running payroll manually, a standing calendar reminder tied to each pay date is the minimum viable safeguard.
If you work with a payroll provider running multi-country teams, confirm in writing which deadlines they own and which remain your direct responsibility. Outsourcing payroll does not transfer your legal liability for missed deposits — only your operational burden.
Annual calendar reviews matter too. The IRS adjusts the Social Security wage base each year, which changes the point at which the 6.2% employee and employer Social Security withholding stops. Build in a check each January to update your payroll system with the current figures.
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