In MiUI, all employer representatives such as Professional Employer Organizations (PEO), those with Power of Attorney (POA), and fiscal intermediaries will be classified as a Third-Party Administrator (TPA).
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Check back here regularly for relevant and helpful updated information about what you need to know about using MiUI. Initially, employers and TPAs will have to perform some duties in MiUI and others in MiWAM. Our handy MiUI Employer Checklist has more details.
During the week of November 17, the following was updated:
Below are some of the changes that will impact employers and TPAs through the transition from MiWAM to MiUI. Check here for all future updates on the system.
In MiUI, employers, third-party administrators (TPAs) with the proper roles, and staff will be able to create payment plans to manage settling debts on employer accounts.
The updated rules governing when a payment plan cannot be created for an employer in MiUI are:
Note: Staff have additional permissions when making payment plans on behalf of employers.
In MiUI, there are several different ways that users can access information related to a specific employer or TPA:
User accounts allow individuals to access an employer or TPA’s account with their own login credentials, rather than the login credentials of the employer or TPA account itself.
Employer/TPA account system administrators (users with full view and edit access for an account) are able to add users to those employer/TPA accounts. There are no limits to the number of system administrators that can be assigned in the system.
When adding a user to an employer account, the employer account system administrator can either elect to make the new user an employer account system administrator as well or assign the user specific roles. The employer account system administrator will also be able to specify which reporting units (location accounts) each role should apply to.
When adding a user to a TPA account, that user must be given TPA account system administrator privileges.
After the employer/TPA account system administrator adds the user to the Employer/TPA account, the user will receive an email inviting them to initiate their account. They will then be able to access the Employer/TPA account and view/edit authorized information using their own credentials.
If a TPA has been tasked with representing an Employer, that TPA will be allowed to view or edit information related to the Employer from within their TPA account. That TPA will only be able to view or edit information related to the specific roles they have been assigned. A full list of available roles can be found here.
Maintaining the Same Employer Account
With the launch of MiUI, a new process will exist for maintaining employer accounts as they switch between reimbursing and contributing status. Unlike previous processes, employers will utilize one account regardless of any changes to their reporting method. All functions—whether reimbursing or contributing—will be completed within the same account. A new account number will not be assigned.
Between the time when MiUi launches and Summer 2026, tax functionalities will be available in MiUI while benefit functionalities will continue to be accessed in MiWAM.
Retired Functionality:
Additional details can be found on our resource guide webpage.
Changes to quarterly wage reporting file formats
There are now four file formats that will be accepted in MiUI. Employers may need to update existing processes to reflect acceptable file formats.
The MiWAM file format will no longer be accepted, employers and / or third-party administrators (TPAs) will need to update existing processes to reflect acceptable file formats. Detailed instructions for each file format can be found linked above or on our resource guide webpage.
Key to the transition is setting up a MiLogin for Business account, which will be required to access MiUI. All users (Employers and Third-Party Administrators (TPAs)) will need a MiLogin for Business account to use MiUI.
At this time, all employers and TPAs should either create a MiLogin for Business account or confirm that they are able to log into their existing account. If an employer or TPA already has a MiLogin for Business account, they do not need to create a new one for MiUI. After logging into MiLogin, employers and TPAs should add MiUI as a service to the account (employers will add the MiUI Employer Portal and TPAs will add the MiUI Agent Portal).
TPA Roles and Access: Third-Party Administrators (TPAs) can be Professional Employer Organizations (PEOs), Fiscal Intermediaries (FIs), Employer Representatives, Reimbursing Employer Groups or Work Opportunity Tax Credit (WOTC) representatives. TPAs are authorized by employers to perform specific unemployment insurance tasks.
Employer Control: MiUI gives employers complete control over their accounts and TPA relationships. Employers can add, update, or remove TPAs and assign specific roles to limit access to only the necessary information and tasks.
TPA Roles: TPAs are authorized by employers to perform specific unemployment insurance tasks. The available TPA roles in MiUI include:
