How often do businesses need to file payroll taxes?

Payroll Tax Filing Frequency for Illinois Businesses

In Illinois, the frequency with which businesses must file payroll taxes depends on the specific tax type and the size of the payroll. Staying compliant with filing schedules helps avoid penalties and ensures smooth operations.

Federal Payroll Tax Filing

Most Illinois businesses follow federal payroll tax filing requirements set by the IRS:

• Form 941 (Employer’s Quarterly Federal Tax Return): Filed quarterly to report income taxes, Social Security, and Medicare taxes withheld.
• Form 940 (Federal Unemployment Tax Act - FUTA): Filed annually, but deposits may be required quarterly depending on the amount owed.

Illinois State Payroll Tax Filing

Illinois requires businesses to file state payroll taxes related to unemployment insurance and withholding:

• Illinois Withholding Income Tax: Filing frequency varies by withholding amount:
  • Monthly filers: Required if withholding exceeds $2,500 per month.
  • Quarterly filers: Allowed if withholding is below $2,500 per month.
  • Annual filers: Small employers with minimal withholding may file annually.
• Illinois Unemployment Insurance (UI): Employers must file quarterly wage reports and pay UI taxes quarterly through the Illinois Department of Employment Security (IDES).

Operational Tips for Managing Payroll Tax Filing

• Automate payroll processing: Use payroll software that integrates tax calculations and filing reminders to meet deadlines.
• Maintain accurate records: Keep detailed payroll records to support filings and audits.
• Monitor filing thresholds: Review your business’s withholding amounts regularly to adjust filing frequency as required.
• Stay updated: As of 2026, verify any changes in filing requirements with the IRS and Illinois Department of Revenue (IDOR).