Missouri Payroll Tax and Registration Guide
To stay compliant with Missouri payroll tax regulations, employers must provide specific information before using Beyond to process payroll:
Missouri Withholding Tax Account Number and any required state/local tax IDs.
State unemployment tax (SUI) and other assigned rates, which vary based on your industry, history, and payroll size.
TPA access and Power of Attorney documentation, typically required so Beyond can file returns and submit tax payments on your behalf.
Accurate, up-to-date tax account details are essential for Beyond to file and pay correctly. Missing or incorrect data can trigger penalties or interest—costs for which Beyond cannot assume responsibility.
All Missouri Employers
Existing Employers in Missouri
If you’ve already processed payroll in Missouri, you likely have the IDs and credentials needed:
New Missouri Employers
You must register with both state agencies before Beyond can file on your behalf:
Registration can be completed through the state’s online system (details below).
Existing Employers
Find your Withholding Tax Account Number in correspondence from the Missouri Department of Revenue. If you can’t locate it, call (573) 751-3505.
New Employers
Register online through the Missouri Department of Revenue. During that process you can also register for unemployment. You may alternatively submit the Missouri Tax Registration Application (Form 2643). After submission:
Updated for 2025
Existing Employers
Your Missouri Unemployment Account Number and current SUI Rate appear on the annual Tax Rate Notice mailed by the Missouri Department of Labor. They also appear on your Quarterly Contribution and Wage Report (Form MODES-4). Missouri SUI rates may be up to 5.4%, applied to a $9,500 taxable wage base.
New Employers
When you register through the Missouri Department of Revenue’s online system, your information is forwarded to the Department of Labor to establish your unemployment account.
