Illinois variant. This is a Illinois-specific version of the Workers Comp Cost Estimator, using pre-defined local figures (tax rates, median home and income values, and typical regional costs). For the full formula, methodology, and FAQ, open the main Workers Comp Cost Estimator.
Workers' compensation premiums in Illinois are priced per $100 of payroll, by job classification. On a $78,433 salary at an illustrative $1.00 rate, the annual premium is about $784.
How Illinois workers' comp is priced
Premium = (payroll ÷ 100) × class rate × experience modifier. Clerical roles carry low rates; construction and trucking carry much higher ones.
Illinois sets its own rules and rates. The calculator above lets you enter your real payroll, class rate, and mod factor for an accurate Illinois estimate.
About taxes and housing in Illinois
Illinois applies a single flat income tax rate to all earners, as its constitution prohibits a graduated income tax.
Illinois has among the highest effective property tax rates in the nation, which is a major factor in overall housing costs.
Illinois's economy is anchored by Chicago as a center for finance, transportation, and manufacturing, with agriculture dominant downstate.
Worked example: $78,433 payroll
($78,433 ÷ 100) × $1.00 = $784/year at a sample clerical rate. A construction class rate of $8.00 would make it $6,275.
Quick reference
- State income tax: Flat 4.95%
- State sales tax: 6.25% (plus 2.59% avg local)
- Median home value: $270,000
- Median household income: $78,433
- Effective property tax rate: 2.08%
- Avg auto insurance: $1,652/yr
Frequently Asked Questions
How is workers' comp calculated in Illinois?
By payroll ÷ 100 × class rate × experience modifier, using Illinois's approved rates.
Is workers' comp required in Illinois?
Most Illinois employers must carry coverage once they have employees; rules vary by industry and headcount.