What payroll deadlines should employers track?

Montana Payroll Tax Deadlines Employers Should Track

Employers operating in Montana must stay on top of several key payroll tax deadlines to ensure compliance and avoid penalties. These deadlines cover tax deposits, filings, and reporting requirements at both the state and federal levels.

Federal Payroll Tax Deadlines

• Federal Tax Deposits: Employers must deposit federal income tax withheld, Social Security, and Medicare taxes according to their deposit schedule (monthly or semi-weekly) as determined by the IRS.
• Form 941 (Quarterly Federal Tax Return): Due by the last day of the month following the end of each calendar quarter (e.g., April 30 for Q1).
• Form W-2 and W-3: W-2 forms must be furnished to employees by January 31 and filed with the Social Security Administration by the same date.
• Form 940 (Federal Unemployment Tax): Annual filing due by January 31 for the previous calendar year, with deposits required quarterly if the tax owed exceeds $500.

Montana State Payroll Tax Deadlines

• Montana Income Tax Withholding: Employers must deposit withheld state income taxes on a monthly basis, generally by the 15th day of the following month.
• Montana Unemployment Insurance (UI) Contributions: Payments and quarterly wage reports are due quarterly, typically by the last day of the month following the end of the quarter (e.g., April 30 for Q1).
• Quarterly Wage and Tax Reports: Employers must file wage reports and pay unemployment insurance taxes to the Montana Department of Labor & Industry on time to maintain compliance.

Operational Recommendations

• Set Automated Reminders: Use payroll software or calendar tools to automate reminders for all federal and state filing and payment deadlines.
• Maintain Accurate Records: Keep detailed payroll and tax records to simplify quarterly and annual reporting requirements.
• Coordinate With Payroll Providers: If using third-party payroll services, confirm their schedules align with Montana-specific deadlines.
• Review Changes Annually: As of 2026, regularly check for any updates in Montana payroll tax rates or deadlines to adjust processes promptly.