Need a DOT inspection near you in Illinois?
For vehicles that only need the federal annual, Bright Inspect inspects them where they're parked. Certificate of Safety vehicles use official testing stations, so we confirm your vehicle before you pay.
| Item | Illinois |
|---|---|
| Lead agency | Illinois State Police; Illinois Department of Transportation (Certificate of Safety) |
| Federal rules | Federal baseline plus state inspection program |
| Who's covered | By vehicle class and registration, not one weight line |
| Annual inspection | Every 12 months federally |
| State program | Certificate of Safety: generally every 6 months; annual for some lighter trucks |
| FMCSA-accepted state program | Yes |
Compare Illinois with other states on the state requirements hub, or see which states run their own inspection programs.
Illinois State Police handle roadside enforcement. IDOT oversees the Certificate of Safety program and the official testing stations that run it, under the Illinois Vehicle Code.
Federal rules are the baseline, and Illinois adopts federal inspection standards (92 Ill. Adm. Code 3420). State inspection coverage depends on vehicle class and registration, not one weight number, so check your vehicle's class rather than assuming a 10,001 or 26,001 lb line.
| Operation | Who's covered |
|---|---|
| Interstate | 10,001 lb or more, plus federal passenger and hazmat triggers (49 CFR 390.5) |
| Illinois Certificate of Safety | Listed vehicle classes by registration, including second-division vehicles, truck tractors, covered trailers, buses, tow trucks, limousines and medical transport vehicles |
Two layers. The federal annual applies to interstate CMVs. The state Certificate of Safety program applies to listed vehicle classes, mostly every 6 months, with school buses every 6 months or 10,000 miles, whichever comes first.
| Inspection | Applies to | How often | Rule |
|---|---|---|---|
| Federal annual | Federal CMVs | 12 months | 49 CFR 396.17 to 396.23; 92 Ill. Adm. Code 3420.2000 |
| Certificate of Safety | Second-division vehicles, truck tractors, covered trailers, motor buses, school buses, religious-organization buses, senior citizen vehicles, medical transport vehicles, tow trucks, limousines and more | Generally 6 months; trucks, tractors and semitrailers registered over 10,000 but under 26,001 lb at least annually; school buses 6 months or 10,000 miles | 625 ILCS 5/13-101, 13-109 |
Illinois's Certificate of Safety program is on FMCSA's accepted list, so vehicles it covers must use it. Certificate of Safety inspections are done by an Illinois official testing station, an authorized mobile safety-testing company, or an approved fleet self-testing program. A technology-based inspection doesn't replace that.
For federal-only vehicles, an inspector qualified under 49 CFR 396.19 may perform the annual, and that's where Bright Inspect fits. Which vehicles are federal-only is still being confirmed, so ask us before booking and we'll check your vehicle class first.
Certificate of Safety vehicles carry a valid certificate showing the next inspection month, and school bus certificates show the mileage limit. Federal annual reports are kept 14 months, with proof on the vehicle.
| Vehicle | Rule |
|---|---|
| Tow trucks | In the Certificate of Safety program |
| School buses | Certificate of Safety every 6 months or 10,000 miles; interstate school buses may also need the federal annual |
| Passenger carriers | Motor buses, religious-organization buses, senior citizen vehicles, limousines and medical transport vehicles, including compensated non-emergency medical carriers, are in the Certificate of Safety program |
Illinois State Police conduct roadside inspections. Federal rules let an officer cite you under 49 CFR 396.17(c) when proof of a current annual inspection isn't on the vehicle; it carries a CSA severity weight of 4. The officer gives the driver an inspection report. The carrier must certify that listed violations were corrected and return it within 15 days, and keep a copy for 12 months (49 CFR 396.9). Fines are set by state law. A missing or expired Certificate of Safety is a separate state violation.
We're still confirming roadside fines for a missing annual inspection in Illinois. Check with the Illinois State Police directly.
Stopped without proof of a current annual? See what to do when your inspection expired or failed at roadside and what happens if your annual inspection is expired. Nobody can promise to remove a violation or change a safety score; what fixes the problem going forward is a current inspection and a complete record.
Last reviewed: September 11, 2026