Missouri · Payroll registration
Missouri payroll tax registration, done for you.
Every employer paying wages to an employee working in Missouri has to register. Form 2643, the Missouri Tax Registration Application, covers withholding alongside sales and use tax, and the permanent number it issues is not transferable, which matters if the business is ever sold.
Last updated:
Who you are dealing with
Missouri Department of Revenue
- Handles:
- Employer withholding, and sales, use, and corporate income tax on the same application
- System:
- MyTax Missouri
- Form:
- Register electronically through MyTax Missouri, or on paper with Form 2643, the Missouri Tax Registration Application, posted to PO Box 357, Jefferson City MO 65105-0357 or faxed to 573-522-1722. Transient employers use Form 2643T
Missouri Division of Employment Security
- Handles:
- Unemployment insurance employer account
- System:
- UInteract
- Form:
- Registered separately from the Department of Revenue application
- Phone:
- 573-751-1995
Missouri Division of Employment Security, payroll registration
State fee. $0 to register. Our flat fee covers preparing and filing each registration.
Our fee. $180 per state, flat. State fees are passed through at cost.
When you have to register
Every employer paying wages to an employee working in Missouri must register. It is framed as a condition rather than a threshold, so there is no wage amount to wait for.
What comes next
For later: Missouri's trigger for closing includes an employer who indefinitely ceases to pay wages, not only one who closes or sells, and the closure is Form 5633 with Revenue plus a Request to Close Account in UInteract.
How long it takes
Missouri does not publish a turnaround we could confirm. Registering electronically through MyTax Missouri is the faster of the two routes and leaves a record, where the posted or faxed Form 2643 does not.
What we do
We work out which accounts you need, submit each registration, and hand you the account numbers, rates, and deposit schedules your payroll system asks for. One remote hire. $180 per state, plus state fees at cost. We submit within 2 business days. You keep the client. We never email them.
Hiring in more than one state? State payroll tax registration covers the withholding and unemployment accounts payroll software will not open.
What makes Missouri harder than average
- The registration number is permanent and not transferable. Missouri says so directly. If the business is sold, the buyer does not inherit it, which is the same trap Wisconsin sets with its seller's permit.
- One application, several tax types, and one agency it does not reach. Form 2643 covers withholding, sales, use, and corporate income tax with Revenue. Unemployment is the Division of Employment Security and needs its own registration.
- There is a separate form for transient employers. Form 2643T exists for employers who are not permanently located in Missouri. Using the standard 2643 when the transient form applies creates a registration that does not match the business.
- Three ways to submit and only one leaves a record. MyTax Missouri online, post to the Jefferson City PO Box, or fax. If you use paper, keep your own copy, because there is no acknowledgement to rely on.
How Missouri compares
What triggers registration in Missouri is not what triggers it next door. The table sets the thresholds side by side.
Questions and answers
When does Missouri require registration?
Whenever you pay wages to an employee working in Missouri. It is stated as a condition rather than a dollar threshold, so there is no amount to reach first.
Does one form cover everything?
Form 2643 covers withholding along with sales, use, and corporate income tax at the Department of Revenue. Unemployment insurance is separate, at the Division of Employment Security.
I bought a Missouri business. Can I use its registration number?
No. Missouri states the number is permanent and not transferable. The buyer registers in their own right.
What is Form 2643T?
The transient employer version of the registration application, for employers not permanently located in Missouri. If that describes you, it is the correct form rather than the standard 2643.
What do you need from me to start?
The legal name and FEIN, entity type, Missouri work locations, first payroll date, whether you are permanently located in Missouri, and whether the business was purchased from an existing employer.
The forms behind this filing
Also in Missouri
Agency details verified 2026-08-03
About the provider
Regcrest LLC is a document preparation and filing service based in Allentown, Pennsylvania, founded in 2026. It prepares and files state payroll and sales tax registrations, account closures, and resale certificates on behalf of the businesses that instruct it, and works behind accounting firms, bookkeepers, and payroll providers as well as directly with businesses.
Regcrest LLC is not a CPA firm and not a law firm. It gives no tax or legal advice. It files in all 50 states, and publishes a full page for the 29states it has verified against the agency's own material so far, each one showing the date it was checked. For anything that turns on your specific situation, ask a licensed accountant or attorney.