Updated September 12, 2023
This article will cover:
- What information OnPay needs from you
- What state and local taxes and filings OnPay handles for Missouri employers
- Where you can find the tax account numbers needed
- Paying employees in other states?
Why is this important?
For employers who pay employees in Missouri, the state will require state income tax. Use this guide to learn what’s required to start running payroll while keeping compliant with state payroll tax regulations. Click on the topic below to learn more.
What information OnPay needs from you
Use this checklist to make sure you’ve covered everything required to set up your account as a Missouri employer so OnPay can accurately file and pay taxes on your behalf:
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✔ |
To do: |
What is this? |
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Make sure your business is registered with the Missouri Department Revenue |
Allows your business to file and pay taxes in Missouri |
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Make sure your business is registered with the Missouri Department of Labor |
Allows your business to pay required unemployment insurance in Missouri |
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Provide OnPay with your Missouri Withholding Tax Account Number and deposit schedule |
The employer identification number issued by the Missouri Department of Revenue |
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Provide OnPay with your Missouri Unemployment Account Number |
A 6-digit number unique to your account with the Missouri Department of Labor |
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Provide OnPay with your Missouri Unemployment (SUI) Rate |
A tax rate you receive annually from the Missouri Department of Labor |
What state and local taxes and filings OnPay handles for Missouri employers
OnPay handles the filing of all state and local taxes for businesses in Missouri, including:
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Type of Tax |
Form ID |
Form Name |
Frequency |
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Withholding |
Form MO-941 (Filing) |
Employer's Withholding Tax - Monthly Return |
Monthly, Quarterly, & Annual |
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MO W-3 (Filing) |
Transmittal of Tax Statements |
Annual |
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State W2 (Filing) |
Wage and Tax Statement |
Annual |
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Unemployment |
MODES-4 (Filing) |
Employer's Quarterly Contribution and Wage Report |
Quarterly |
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Other |
New Hire Report (Filing) |
Missouri Report of New Hires |
As required |
Where you can find the tax account numbers needed
If you are an existing employer who has previously run payroll in the state of Missouri, you likely already have the IDs and online accounts needed for OnPay to process your tax filings.
If you are a new employer in Missouri, you will need to register your business with the Department of Revenue and Missouri Department of Labor. This must be completed for OnPay to be able to file and pay your Missouri taxes.
Withholding Tax Account Number
Existing Missouri Employer:
You can find your Withholding Tax Account Number on notices received from the Missouri Department of Revenue. If you cannot locate this document or account number, please call the Missouri Department of Revenue at (573)-751-3505 to request it.
New Missouri Employer: Register with the Missouri Department Revenue
- Visit the Missouri Department of Revenue where you can use their “online registration system”. You will be able to register with both the Missouri Department of Revenue and Department of Labor at once. You can also download the Missouri Tax Registration Application (Form 2643).
- Before registering, make sure you have all required information listed under “Checklist for Completing Application” on Form 2643.
- After you have completed your online registration, you will receive a confirmation number and additional information about your registration. Please maintain the confirmation number for your records. Allow 2-3 business days for processing. If you have any questions, please contact the Missouri Department of Revenue at (573)-751-3505.
Unemployment Account Number and Tax Rate
Existing Missouri Employer:
- You can find your Unemployment Account Number on the annual Tax Rate Notice received from the Missouri Department of Labor. It can also be found on your Quarterly Contribution and Wage Report (Form MODES-4).
- The SUI rate for employers can be up to 5.4%, with a wage base of $11,000.
New Missouri Employer: Register with the Missouri Department of Labor
- When you register your business using the Missouri Department of Revenue’s online registration system, you are also registered with the Department of Labor.
- After you have completed your online registration, you will receive a confirmation number and additional information about your registration. Please maintain the confirmation number for your records. Allow 2-3 business days for processing. If you have any questions, please contact the Missouri Department of Revenue at (573)-751-3505.
- The SUI rate for new employers in non-construction businesses is 2.376%, with a wage base of $11,000.
Paying employees in other states?
If you operate in multiple states or just have employees working from home across a state line, it's important to file the correct state forms for those workers. See what forms we file in the states where you pay employees.
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