More information

Division of Unemployment Insurance

Content Contact: Tax & Accounting Staff

Quick Links to Online Services:

• ESP Services
• New Employer Registration
• Register a Business
• Upload tax and wage reports

Employer Service Provider (ESP) Resources

Online Services

• Employer Service Provider On-line Services includes access to the on-line tax and wage reporting system and the wage report validation test environment.
• New Employer Registration

File Tax and Wage Reports

• About Tax Reporting
• Tax Report File Layout
• Tax Report Error Messages

• About Wage Reporting
• Wage Report File Layout
• Wage Report Error Messages

New Employer Registration

• Register a Business

Client Tax Rates and Data File Exchange

• Request Client Tax Rates
• About Data File Exchange
• Download Data File Exchange Template

Resources

• Handbook for Employers
• Tax Questions
• UI Forms
• UI Publications
• Legal Resources

Definition of an Employer Service Provider (ESP)

An Employer Service Provider (ESP) or employer agent is any third party who prepares the quarterly contribution tax and/or wage report on behalf of an employer who is subject to Wisconsin's Unemployment Insurance (UI) law.

Employer Service Provider Requirement

All ESPs preparing reports for employers must file employer tax and wage reports using an electronic medium and format approved by the Department of Workforce Development (DWD). Tax and wage reports may be filed electronically only if an employer has a UI account number.

Where to Register and File a Tax & Wage Report

1. You may use Online New Employer Registration to obtain a UI account number for an employer.
2. ESPs have the ability to upload tax reports using Secure Hypertext Transfer Protocol (HTTPS), and upload both tax and wage reports using Secure File Transfer Protocol (FTPS).