Register in Missouri
Missouri tax agencies
- Missouri Department of Revenue (DOR) - income tax withholding
- Missouri Department of Labor and Industrial Relations - unemployment tax
Set up an existing company
If you've run payroll in the past in MO, you can find your Missouri Tax ID Number on the Employer's Return of Income Taxes Withheld (Form MO-941) received from the MO Department of Revenue. If you're unsure you can call the agency at (573) 751-3505.
If you've run payroll in the past in MO, you can find your Unemployment Account Number on the Notice of Liability sent to you by the Department of Labor and Industrial Relations, on your Quarterly Contribution and Wage Report (Form MODES-4-7).
Unemployment Insurance Tax Rate: Your Unemployment Insurance tax rate can be found on the most recent Notice of Liability you received from the Department of Labor and Industrial Relations. It ranges from 0%–10.5% with a wage base of $13,000. You can also get your account number and rate by calling the agency at (573) 751-3215.
Register a new company
New employers in Missouri can register for both of these agencies 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 the withholding tax and the unemployment tax. You should receive your account numbers in 1-2 weeks. You will also receive your deposit schedule. Please keep this time frame in mind when planning your first Missouri payroll.
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. For new employers, the Unemployment Insurance tax rate is typically 1%–9% with special cases for those in the mining, construction, and non-profit industries.
Note: Beginning in Quarter 4 2016, the Missouri SUI ID format changed from 14 digits to 10 digits. For our existing customers we will be communicating with the state directly to retrieve all of these new account numbers. For new customers who have run payroll previously, you may enter in your old ID and we will communicate with the state directly to retrieve your new account number. If you are a new customer who is registering for an account for the first time, you will not be able to enter your ID with the new format until the end of December. If you receive a notice about the updated ID format, you may disregard it at this time.
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.
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 1 (314) 622-4847, attention "Mark". If you have any questions, you should call the agency at (314) 622-4111.