State website:  www.illinois.gov
   
General Business Requirement:

Apply to the Secretary of State for a Certificate of Authority to conduct business in Illinois.

Application for Authority to Transact Business in Illinois

Business Entity Registration Forms

Licensing/Registration:

Employee Leasing Company (Lessor) Registration ELC–1  

Employee Leasing Company - Obligation To Report The Identities Of Its Clients

Employee Leasing Company Act (215 ILCS 113/) 

Unemployment Insurance:

Report to Determine Liability Under the Unemployment Insurance Act

New Employer Rate (2009) = 3.1%
Wage Limit (2009) - $12,300
Employer/Reporting Unit for SUTA contributions:  PEO, if certain conditions are met.
See:  Employee Leasing Company Compliance Requirements

Agency Web Site:  Illinois Dept. of Employment Security 

State Taxes:

Illinois Business Registration Application

Agency Web Site:  Illinois Dept. of Revenue

Workers’ Compensation:

Rating Bureau – NCCI:  State Specific Requirements for PEO
(Best viewed in Internet Explorer)

Workers’ compensation coverage can be provided by a registered PEO or
Client/Co-employer.

Exclusive remedy benefits apply to both PEO and client/co-employer.
See:  Employee Leasing Company Act (215 ILCS 113/)

Agency Web Site:  Illinois Division of Insurance

Benefit Plans:

PEO and/or client can sponsor fully insured benefit plans.

A PEO sponsored self-funded benefit plan will likely be deemed unauthorized insurance and will be subject to Illinois insurance regulations.

Agency Web Site:  Illinois Division of Insurance