What payroll deadlines should employers track?

Wisconsin Payroll Tax Deadlines Employers Should Track

Managing payroll taxes in Wisconsin requires careful attention to specific filing and payment deadlines to maintain compliance and avoid penalties. Below is an overview of key deadlines employers must track as of 2026.

Federal Payroll Tax Deadlines

• Federal Income Tax Withholding and Social Security/Medicare Taxes (Form 941): File quarterly returns by the last day of the month following the end of each quarter.
  • Q1 (Jan-Mar): April 30
  • Q2 (Apr-Jun): July 31
  • Q3 (Jul-Sep): October 31
  • Q4 (Oct-Dec): January 31 of the following year
• Federal Unemployment Tax (FUTA) (Form 940): File annually by January 31 for the previous calendar year, with deposits due quarterly if tax liability exceeds thresholds.
• Federal Tax Deposits: Deposit withheld taxes and employer contributions according to IRS deposit schedules (monthly or semi-weekly based on tax liability).

Wisconsin State Payroll Tax Deadlines

• Wisconsin Income Tax Withholding: Employers must deposit withheld state income taxes electronically on a monthly or semi-weekly basis depending on the amount withheld.
  • Monthly Depositors: Payment due by the 15th of the following month.
  • Semi-Weekly Depositors: Payment due within three banking days after the payroll date.
• Unemployment Insurance Contributions: File quarterly wage reports and pay contributions by the last day of the month following the end of each calendar quarter.
  • Q1: April 30
  • Q2: July 31
  • Q3: October 31
  • Q4: January 31 of the following year
• Annual Reconciliation: Submit annual withholding reconciliation returns by January 31 of the following year.

Operational Recommendations

• Automate Payroll Tax Deposits and Filings: Use payroll software integrated with Wisconsin and federal tax systems to ensure timely deposits and filings.
• Maintain Accurate Recordkeeping: Keep detailed payroll records including wage reports, tax deposits, and filings for audit readiness.
• Monitor Employee Classification: Properly classify workers to avoid misreporting payroll taxes and ensure correct withholding and contributions.
• Stay Updated on Changes: Review Wisconsin Department of Revenue and Department of Workforce Development updates regularly for any changes in deposit schedules or tax rates.