Professional Employer Organizations in Illinois

Professional Employer Organizations (NAICS 561330) in Illinois reports 41,517 workers across 144 establishments, with $3.0B of aggregate annual payroll flowing through Census CBP 2023 filings. That represents 1.1% of national employment for this industry, a concentration ratio that tells you whether Illinois is a primary labor market for this NAICS code or a smaller satellite. A share above 5% signals a meaningful regional cluster; below 1% usually means the state is not a structural fit for this industry at scale. Illinois accounts for 3.3% of the national Professional Employer Organizations establishment count (144 of 4,343), according to Census County Business Patterns.

Wage benchmarking is where state-level data earns its keep. The average annual compensation for Professional Employer Organizations employees in Illinois is $71,454/yr, versus a national average of $72,164/yr. Illinois pays below the national average for this industry, common in lower cost-of-living states or where the industry has a smaller, less specialized local workforce.

Profitability data is only available at the national level because the IRS Statistics of Income program does not publish state-level margin breakdowns. The national net profit margin for Professional Employer Organizations is not reported, and while margins do vary by state, the direction of variance usually follows labor cost and establishment size, both shown above. For a complete picture, pair this state-industry view with the Professional Employer Organizations national page (entity structure, SBA lending, sub-industries) and the Illinois overview (top employers, payroll dispersion across industries).