Private investigator cost in Illinois
Estimated Illinois rates are national published ranges adjusted by the BEA Regional Price Parity index for Illinois (100 vs. U.S. = 100). State-specific PI wage data is limited, so treat these as informed estimates.
| Service | Typical Illinois range |
|---|---|
| Infidelity / surveillance | $90–$175/hr |
| Child custody | $90–$175/hr |
| Workers' comp / insurance fraud | $75–$150/hr |
| Corporate / due diligence | $125–$300/hr |
| Background check | $150–$900 flat |
| Locate a person / skip trace | $150–$1,200 flat |
| Asset search | $1,000–$1,600 flat |
| Process serving | $65–$125 flat |
Licensing in Illinois
Licensed by IDFPR (Private Detective, Private Alarm, Private Security, Fingerprint Vendor & Locksmith Board).
Official Illinois licensing / regulatory site →
Always ask for the investigator's license number and verify it with the state before hiring. Rules change; confirm current requirements with the regulator.
Top-rated local investigators in Chicago, IL
Ratings and review counts are from public Google Maps data as of 2026-10-16, ranked by rating weighted by review volume. Listed businesses are not affiliated with, and do not endorse, this site. Always verify licensing.
City guides: Chicago
Private investigator cost estimator
Estimates use national ranges from published 2026 pricing guides, adjusted by the U.S. BEA Regional Price Parity index for your state, plus mileage at the IRS standard rate ($0.70/mi). Real quotes vary. See sources & methodology.
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