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New company registration in Missouri

Income tax withholding and state unemployment tax

New employers in Missouri can register for both of these taxes together by visiting the Missouri Online Business Registration website. Click Continue at the bottom of the page to begin the process, and make sure to register for withholding tax and unemployment tax. You should receive your account numbers in 1-2 weeks. Please keep this time frame in mind when planning your first Missouri payroll. You will also receive your assigned withholding tax deposit schedule which needs to be entered in Gusto. 

Most companies are liable for state unemployment if they pay more than $1,500 of wages in a calendar quarter or have an employee for some part of a day in each of 20 different weeks.

Unemployment Insurance Rate

The Unemployment Insurance Tax rate can be found on the most recent Notice of Liability you received from the Dept. of Labor and Industrial Relations, or by calling the agency at (573) 751-3215. Click here to view state-by-state new employer rates and wage bases.

Note: Beginning in Quarter 4 2016, the Missouri SUI ID format changed from 14 digits to 10 digits. If you have a 14 digit ID, please contact the Dept. of Labor and Industrial Relations to get your updated 10 digit ID.

Kansas City Account ID

Employees who live or work in Kansas City are subject to a tax from the City of Kansas City, Finance Department. 

You can find your Kansas City Account ID by logging into your Quick Tax Account (click on 'Individual or Business') or by calling (816) 513-1120. 

If you don't have a number yet, you can register the business with the City of Kansas City, Missouri - Revenue Division online or call (816) 513-1135.

Kansas City Letter ID

In order for Gusto to file and pay your City of Kansas City Earnings Tax on your behalf, we need to know your Letter ID. You can find it on the top-right corner of letters that you have received from the City of Kansas City, Finance Department within the last year. Your Letter ID can also be found by logging into your Quick Tax Account and clicking the "Letter" tab.

If you haven't registered for a Quick Tax Account, you can register the business with the City of Kansas City, Missouri - Revenue Division online.

St. Louis City Tax 

In order to pay your St. Louis City Tax and Payroll Expense Tax you need to register with the the City of St. Louis Collector of Revenue. You can do this by completing Form E-9 and faxing it to the St. Louis Collector of Revenue at (314) 622-4847, attention "Registration". If you have any questions, you should call the agency at (314) 622-4111.  

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