Illinois PEO Laws: Registration, Bonding and Payroll Requirements

Written by Peolet Editorial · Reviewed by Peolet Editorial · Last verified 2026-08-12

Sources

• IDES - every business with employees in Illinois must register with IDES and file quarterly UI contribution and wage reports; no PEO-specific licensing statute exists in Illinois — verified 2026-08-12
• IDES EA-50 2026 - taxable wage base increased to $14,250 for 2026; IDES historical rate chart: $13,590 (2024), $13,916 (2025), $14,250 (2026) — verified 2026-08-12
• IDES EA-50 2026 - entry rate 3.350% (3.450% NAICS sector 56) including 0.550% Fund Building Rate; 2026 range 0.750%-7.050%; State Experience Factor 102%; BCF 138.4% — verified 2026-08-12
• 820 ILCS 305/4(a) - self-insurance approval or insurance with a carrier authorized in Illinois covering the entire liability; group pools under Illinois Insurance Code Article V 3/4; no state fund — verified 2026-08-12
• Paid Leave for All Workers Act, 820 ILCS 192/15 - up to 40 hours paid leave per 12-month period for any reason; 1 hour per 40 hours worked; 90-day wait; frontloading; municipal ordinance exemption — verified 2026-08-12
• DOL state minimum wage table (updated July 1, 2026) - Illinois $15.00 per hour, employers of 4+ employees excluding family members; weekly overtime at 40 hours — verified 2026-08-12

What we know about Illinois

Illinois is the quietest of the five states for PEOs because there is no professional employer statute at all: no registration, no bond, no renewal cycle, and no dedicated regulator. A PEO doing business in Illinois is simply an employer for unemployment insurance purposes. The Illinois Department of Employment Security requires every business with employees in the state to register with IDES and file quarterly UI contribution and wage reports (UI-3/40), and the state's rule set makes no special provision for leasing arrangements - which means the PEO's account, rate, and liability flow from ordinary experience rating. The 2026 numbers are published in the IDES EA-50 report. Most employers who became liable for contributions on or after January 1, 2024 pay the entry rate of 3.350% for 2026, and employers in NAICS sector 56 (administrative support and waste management) pay a higher 3.450% entry rate; both figures include the 0.550% Fund Building Rate in effect for 2026. Experience-rated employers compute a benefit ratio - total benefit charges (converted by the 138.4% Benefit Conversion Factor) divided by taxable wages - and multiply it by the 2026 State Experience Factor of 102%, then add the 0.550% Fund Building Rate, producing the 2026 range of 0.750% minimum to 7.050% maximum. The taxable wage base for 2026 is $14,250, up from $13,916 in 2025 (and $13,590 in 2024), per the IDES historical rate chart and the EA-50 publication. An employer whose computed rate exceeds 5.400% and whose quarterly wages are below $50,000 pays at 5.400% for that quarter. Workers' compensation is a wholly private market: Section 4(a) of the Workers' Compensation Act (820 ILCS 305/4) requires every employer to file for approval as a self-insurer (with a current financial statement and security as the Commission requires) or to insure the entire compensation liability in some insurance carrier authorized, licensed, or permitted to do such business in Illinois; carriers must cover all employees and the entire compensation liability, and a carrier is primarily liable to the employee if the employer does not pay. Group self-insurance pools exist under Article V 3/4 of the Illinois Insurance Code, and the Illinois Workers' Compensation Commission administers the self-insurance program while the market of last resort is the NCCI-administered assigned risk plan. Illinois is notable this year for its paid leave mandate: the Paid Leave for All Workers Act (820 ILCS 192, effective January 1, 2024) gives every employee in Illinois the right to earn and use up to 40 hours of paid leave per 12-month period for any reason, accruing at a minimum of one hour per 40 hours worked, with a 90-day waiting period before leave can be used and a prohibition on requiring employees to state a reason or provide documentation (employers may frontload the full 40 hours and then cap carryover). The law exempts employers already covered by municipal paid leave ordinances in effect before January 1, 2024 - Chicago and Cook County among them - and allows waivers in bona fide collective bargaining agreements in the construction and parcel delivery industries. The minimum wage is $15.00 per hour for employers of four or more employees, with overtime premium after 40 hours, and the state has not moved to inflation indexing as of the July 1, 2026 DOL table update. For a PEO evaluating Illinois, the practical takeaway is administrative simplicity: the PEO registers with IDES like any employer, reports quarterly, and its workers' compensation coverage is placed with licensed private carriers or through approved self-insurance - no bond, no biennial registration dance, and no PEO-specific filing calendar, though the PEO should confirm the treatment of worksite employees in its own arrangements with the agency.

Nearby states

• Indiana
• Iowa
• Kansas
• Idaho

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Related tools: Illinois PEO FAQs · estimate what a PEO costs for employees in Illinois · get matched with providers that can operate here · download the full 50-state dataset