For Existing Michigan Businesses:
If you already have access to the Michigan Department of Treasury website and have a withholding tax ID number, please STOP, and simply provide us with the data requested in the "Give us your Info" section of the Michigan Tax document. If you have access to the Michigan Department of Treasury website but do not have a withholding tax ID, please log into your Michigan Department of Treasury account and apply for access to a withholding ID. If you have any questions, please call the Michigan Department of Treasury directly at 1-601-923-7700
- If you've run payroll in the past in Michigan, you can find your 9 digit (Ex: 12-3456789) MI Withholding Tax ID Number on notices you've received from the Department of Treasury. This number is always the same as your company's FEIN.
- If you've run payroll in Michigan previously you'll find your 10 digit (Ex: 1234567 000) MI UIA Account number on notices that you have received from the Department of Labor. If you have a 7 digit UIA Account number please enter 000 for the last three digits to make it 10 digits in length.
- Your total unemployment rate appears on the bottom right of Form UIA 1771, the Tax Rate Determination For Calendar Year notice that you receive every year from the Unemployment Insurance Agency. This rate ranges from 0.78%–15.93% with a wage base of $9,000 and includes the Obligation Assessment Tax.
For New Michigan Businesses:
Please follow the steps below to register your business with the Michigan Department of Treasury. Unless these steps are followed in their entirety, OnPay will be unable to file and pay your Michigan Department of Treasury taxes.
Withholding tax withholding
Most companies will be liable for state unemployment if they have at least one employee in each of any 20 different weeks in a calendar year or pay $1,000 in wages in a calendar year. You can check if you are liable and register with the Michigan Unemployment Insurance Agency online. You will receive their Unemployment (UIA) Employer Account Number in 3 days after completing the online registration. This process can take up to 30 days if registration is completed by mail. The Unemployment rate for new employers in Michigan is 2.7%. In addition, you must include your MI Obligation Assessment Rate when entering this into OnPay (look on the rate notice you received from the agency).