What payroll deadlines should employers track?

Payroll Tax Deadlines for Employers in Idaho

Employers operating in Idaho must carefully track payroll tax deadlines to ensure compliance and avoid penalties. Timely payroll tax payments and filings are essential parts of business operations and affect tax withholding, unemployment insurance, and reporting requirements.

Key Payroll Tax Deadlines in Idaho

• Federal Payroll Tax Deposits: Employers must follow IRS deposit schedules for federal income tax withholding, Social Security, and Medicare taxes. Deposit frequency depends on the total tax liability and can be semi-weekly or monthly. Use the Electronic Federal Tax Payment System (EFTPS) for deposits.
• Federal Payroll Tax Returns (Form 941): File quarterly Form 941 returns by the last day of the month following the end of each quarter:
  • Q1: April 30
  • Q2: July 31
  • Q3: October 31
  • Q4: January 31 (following year)
• Annual Federal Payroll Tax Return (Form 940): File by January 31 for the previous calendar year to report federal unemployment taxes (FUTA).
• Idaho State Withholding Tax Deposits: Idaho requires employers to remit state income tax withholding deposits either monthly or quarterly, based on the amount withheld. Monthly deposits are generally due by the 15th of the following month.
• Idaho Quarterly Withholding Tax Returns: File Idaho withholding tax returns by the last day of the month following the end of each quarter, similar to federal Form 941 deadlines.
• Idaho Unemployment Insurance (UI) Contributions: Idaho employers must report and pay UI taxes quarterly. Reports and payments are due by the last day of the month following the end of each calendar quarter.

Operational Recommendations

• Automate Reminders: Use payroll software or calendar alerts to track all federal and Idaho-specific payroll tax deadlines.
• Maintain Accurate Records: Keep detailed payroll records to support timely filings and payments, which also aids in audits and compliance reviews.
• Coordinate with Payroll Providers: If outsourcing payroll, confirm that your provider is aware of Idaho deadlines and federal requirements to avoid missed payments.
• Stay Updated: As of 2026, verify deadlines annually since tax deposit schedules and filing requirements can change.