Overview: When hiring employees in Missouri, you must register for State Income Tax Withholding through the Department of Revenue (DOR) and State Unemployment Insurance (SUI) Tax through the Department of Labor & Industrial Relations (DOLIR). Additionally, certain cities such as Kansas City and St. Louis impose local earnings taxes that require separate registration.
Important! This guide does not constitute legal or tax advice. You can consult a CPA or attorney for official guidance.
Taxes You Must Register For:
Missouri State Income Tax Withholding
Registration Steps
Step 1: Combined State Tax Registration
Register for both Withholding and Unemployment Tax accounts at once.
Click Start Registration Here
Accept the terms and conditions
Complete the application and select both withholding and unemployment insurance taxes
After submission, you’ll receive your Missouri Withholding Tax ID and Unemployment Employer Account Number.
Step 2: Create a MyTax Missouri Account (Withholding)
To manage withholding tax online:
Go to MyTax Missouri
Select Create an Account
Choose Administrator for my individual or business account
Agree to terms and complete your user profile
A confirmation email will be sent with a temporary password
Log back in, change your password, and answer security questions
Link your business account to your profile by selecting Manage Accounts and entering your tax account details
Step 3: Set Up a UInteract Account (Unemployment)
To manage Missouri unemployment tax:
Go to UInteract
Click New Account Registration
Select I am an employer and have a DES Employer Account Number
Complete the registration process to access your unemployment tax account
Third-Party Access
MyTax Missouri
To authorize withholding tax:
Log in at MyTax Missouri
Select Manage Accounts
Choose I would like to give access to MyTax Account
Enter your business account information
Confirm authorization for Check
UInteract
There is no formal third-party access process through UInteract. If needed, Check will provide instructions based on case-specific requirements.
Local Earnings Tax Registration (If Applicable)
Kansas City
Businesses with employees working in Kansas City must register for the local earnings tax.
Go to the Kansas City Quick Tax Portal
Click Register Here
Choose My Business and follow the registration prompts
After registration:
Locate your Letter ID under the “Letters” tab when logged in to Quick Tax
Provide this Letter ID to Check for filing and payment access
Contact: 816-513-1120
Email: [email protected]
St. Louis
If your business operates in or has employees working in the City of St. Louis:
Complete Form E-9
Submit by fax to (314) 622-4847 or email to [email protected]
St. Louis requires reporting of employee earnings for tax purposes. If your business does not withhold this tax, you are still required to report employees residing in St. Louis.
Contact: (314) 622-4805
Support Contacts
Withholding (DOR): 573-751-3505
Unemployment (DOLIR): 573-751-1995
Quick Tax (Kansas City): 816-513-1120
Earnings Tax (St. Louis): 314-622-4805