Missouri

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Agency Information

Missouri Department of Revenue – Withholding Tax
Missouri Department of Labor and Industrial Relations, Division of Employment Security – Unemployment tax

Add to existing company setup

Submit a request to your service team to add MO (withholding) and/or MOSUI  (unemployment) to your company setup.  Please include the below with your request:  

  • Withholding – Withholding account number and Deposit Frequency.  If you’re unsure of your deposit frequency or account number you can call the agency at 573-751-3505.
  • Unemployment – Account Number and Tax rate.  This can be found on a Tax Rate Notice or the Quarterly contribution report.  If you’re unsure of your tax rate or account number, you can call the agency at 573-751-3215.  Effective 4th quarter 2016, the account number format was changed from 14 digits to 10 digits.  Please contact the state directly to obtain your new account number.
  • Power of Attorney- POA is required, please obtain the prefilled form from your client service representative.

Register a new company

Missouri Department of Revenue and Missouri Department of Labor and Industrial Relations, Division of Employment Security

Employers can register for bout withholding and unemployment online at https://dors.mo.gov/tax/coreg/index.jsp.  Select Continue at the bottom of the page.  Follow the prompts to register your business.  Once completed you will receive your account number and deposit frequency within 1 -2 weeks.

Third Party Registration and/or Power of Attorney Instructions

Power of Attorney is required, please obtain the prefilled form from your client service representative.