By Evan Reid, Founder of Haul Handbook · Updated Jul 25, 2026
Who issues what in Illinois
The permit pages
Illinois-specific requirements
Four agencies, four portals, no single front door
An Illinois carrier deals with the Illinois Commerce Commission for the Public Carrier Certificate and cab cards, the Department of Transportation's ITAP system for oversize and overweight permits, the Department of Revenue's MyTax Illinois for IFTA, and the Secretary of State's Commercial & Farm Truck Division for apportioned IRP registration. Each has its own application, its own credential, and its own renewal clock.
The ILL. C. C. number goes on both sides of the power unit
An intrastate carrier may not operate unless the carrier's trade name (or recognized logo) plus its license and registration number are painted or affixed to both sides of the cab or power unit. Vehicles under 9,000 pounds gross vehicle weight may instead display the same information so it reads clearly from both sides at 25 feet while parked. A carrier that also runs interstate follows federal marking rules and, except for household goods carriers, need not display the intrastate authority number.
The certificate never expires but the cab card does
A Public Carrier Certificate is valid indefinitely as long as the carrier stays in compliance, so there is no annual authority renewal. What recurs is the intrastate cab card: one per vehicle, bought before January 1 each year, with purchasing typically opening the preceding October. A carrier that also runs interstate and buys Unified Carrier Registration is exempt from Illinois cab cards entirely, which makes UCR the cheaper path for anyone crossing the state line.
The Commerce Commission has its own sworn police force
Members of the Illinois Commerce Commission Police Department are fully sworn police officers required to enforce all Illinois laws, so a stop can produce both a court citation and an Administrative Citation for violating the Illinois Commercial Transportation Law. Administrative Citations carry no hearing date when issued; the Commission mails a Notice of Hearing later, and a corporation or LLC contesting one must appear through an Illinois-licensed attorney.
The mileage weight tax option is not a weight-distance tax
Illinois lets an owner of a second-division vehicle elect a mileage weight tax in place of the flat weight tax, paying a $10 registration fee plus a minimum guaranteed mileage weight tax and then a per-mile rate for Illinois miles above the guaranteed maximum. The election binds through the end of the registration year and must be renewed with the Secretary of State by July 1. The catch is decisive: a vehicle on mileage plates cannot be operated outside Illinois. This is a registration election for low-mileage in-state trucks, not the interstate weight-distance regime that New York, Kentucky, New Mexico, and Oregon levy. Illinois levies no weight-distance tax.
A USDOT number is required for Illinois IFTA but not for the Public Carrier Certificate
The Department of Revenue makes obtaining a U.S. DOT number a condition of IFTA registration in Illinois. The Commerce Commission does not: Form PCC-1 asks whether the applicant holds a USDOT number and, if so, to list it, and expressly tells applicants not to enter a USDOT or MC number in the ILCC Number field. An intrastate-only Illinois carrier can therefore hold state authority without a USDOT number, while the same carrier running interstate fuel needs one.
Superload status is triggered by width, not by a gross weight number
Most states define a superload by a gross-weight figure. Illinois triggers it on dimension: moving a vehicle or object exceeding 14 feet 6 inches in width requires a superload permit. Any towed permit that misses the minimum axle-spacing requirements (8 feet 1 inch steer to first tractor tandem axle, 18 feet 6 inches before the first trailer axle, 43 feet 6 inches total spacing) is also processed as a superload.
13 feet 6 inches statewide, with no 14-foot allowance
Illinois caps legal height at 13 feet 6 inches from the underside of the tire to the top of the load on any highway in the state. There is no 14-foot corridor of the kind Texas and several western states allow, so a legal-height load out of the southwest crosses into permit territory at the Illinois line.
Legal length depends on the highway class, not the Interstate label
On Class I and Class II highways there is no overall length limit for a combination, subject to a 53-foot semitrailer and a 45-foot-6-inch kingpin to rear axle measurement. Drop onto a non-designated highway and a tractor-semitrailer is capped at 65 feet overall, a twin combination at 60 feet, and the kingpin measurement tightens to 42 feet 6 inches. A combination over 65 feet gets one highway mile of access off a Class I highway, or five miles off a Class I or Class II highway, for loading, unloading, food, fuel, repairs, and rest.
Cook County and Chicago run their own permit windows
Permits for roads under Cook County jurisdiction go to the Cook County Permit Office at (312) 603-1670, and routes under City of Chicago jurisdiction, including the Central Business District bounded by Cermak Road, Division Street, Halsted Street, and Lake Michigan, go to the City at (312) 744-4696. Loads over practical maximum weights, over 12 feet wide, or over 13 feet 6 inches high are prohibited on Cook County expressways except for stated segments of I-55, I-57, I-290, and I-80. In Cook, DuPage, Lake, Kane, Madison, McHenry, Monroe, St. Clair, and Will counties, wide and tall permit loads are squeezed into a 9:00 a.m. to 3:00 p.m. weekday window.
Running under someone else's authority means filing an equipment lease
An unlicensed operator may run under a licensed Illinois carrier's authority only by executing and filing an Equipment Lease with the Commerce Commission on Form EL-1, at a $15 filing fee per lease. The lease must vest possession, use, control, and responsibility in the lessee while the vehicle is operated by or for the lessee, and an executed copy rides in the vehicle. The license holder is responsible for exercising full direction and control of all equipment and personnel used in its operations.
Fourteen exemption classes, including a water-hauling carve-out
Illinois lists fourteen classes of transportation outside Commerce Commission jurisdiction, and several are unusually specific: farm-to-farm livestock hauling in vehicles registered at 28,000 pounds or less, newspaper delivery to residential subscribers, transportation incidental to a primary business that is not transportation, waste with no commercial value moving to a disposal site, and potable water for human and livestock consumption in containers of 1,600 gallons or less (though not in vehicles carrying more than one container). A carrier relying on an exemption files a Petition for Certificate of Exemption, Form COE-1.
IRP dormancy costs a carrier its apportionment
If an apportioned Illinois vehicle does not operate in two or more IRP member jurisdictions for two or more consecutive registration years, the Secretary of State presumes it was never intended for use in multiple jurisdictions, treats it as not apportionable, and charges 100 percent Illinois registration fees unless the applicant shows otherwise. Illinois also refuses estimated mileage for new or expanded operations from the second registration year on unless the carrier pays more than 100 percent registration of a fleet.
The apportioned cab card must be the original
Illinois issues one base plate bearing APPORTIONED and one apportioned cab card per vehicle, and the rule is explicit that the card carried in the vehicle must be the original. Illinois law enforcement does not accept copies, which makes a photocopied cab card a compliance failure rather than a technicality.
The permit office and who actually issues your permit
The permit office sits inside the Department of Transportation's Bureau of Operations and works through the state's automated permit system. Most permits issue immediately once the application clears.
Jurisdiction is the trap. Roads under Cook County jurisdiction are permitted by the Cook County permit office, and routes under City of Chicago jurisdiction, including the central business district, are permitted by the City. A state permit does not cover those roads, so a Chicago-area move often needs more than one permit from more than one government.
The permit types Illinois issues
Single-trip permits cover one non-divisible load over the legal limits. Illinois prices them from three separate tables: one for over-dimension loads by size category and distance, one for overweight loads by axle configuration, gross weight, and distance, and a third for loads where only an axle is over while the gross stays legal. A load that is both over-dimension and overweight can pay from two tables at once.
For repeat work, Illinois sells limited continuous operation permits by load family, maximum dimensions, and term. There are separate families for construction equipment and general loads, roof and floor trusses, manufactured housing and storage buildings, stackable home frames, and overweight combined with oversize, each with three-month and twelve-month pricing. Crossing permits and grain permits round out the list.
Seasonal and agricultural work has its own bench. A harvest season permit issued from September through December costs nothing and allows a stated percentage over the axle and gross limits on state highways other than Interstates. A separate agricultural permit allows larger percentage overages for moves within a short radius of a field or storage facility.
What a permitted load has to carry and obey
A permit is issued only for a load that cannot reasonably be dismantled, and the applicant carries the burden of showing that. No state or local agency may permit a divisible excess load, apart from fluid milk products, and a permit issued in breach of that rule is void from the moment it is issued.
Sealed international shipping containers count as non-divisible only when the container is moving for import or export and the driver can produce a bill of lading or manifest tying the container number to the permit and naming the foreign country. The original permit, any later permits, and the state's permit conditions form must be in the vehicle, on paper or electronically, and produced on request.
Compare beyond Illinois
Running multi-state loads? The oversize permit costs by state table compares limits and fees across all 51 jurisdictions, and the permit cost estimator prices a specific load per state.
Frequently asked questions
Where do I apply for Illinois truck permits?
- Through the Department of Transportation's automated permit system, which handles the application and issues most permits immediately. Moves on Cook County roads or City of Chicago routes go to those governments instead, and their contact lines are on this page.
Does Illinois offer an annual oversize permit?
- Yes, and it calls it a limited continuous operation permit. Pricing depends on the load family, the maximum dimensions you need, and whether you take the three-month or twelve-month term. The sourced fee tables on our Illinois oversize and overweight page carry every combination.
Are there agricultural permits in Illinois?
- Yes, and one of them is free. A harvest season permit runs from September through December and allows a stated percentage over the axle and gross limits on state highways other than Interstates. A separate agricultural permit allows bigger percentage overages for short-radius moves from a field, grain storage facility, warehouse, or livestock facility.
Can I permit a load that could be split up?
- No. Illinois issues permits only for loads that cannot reasonably be dismantled or disassembled, and the applicant has to establish that. A permit issued for a divisible load, apart from fluid milk products, is void at issue, which means it offers no protection at all in an enforcement stop.
Haul Handbook publishes educational information about trucking registration and compliance requirements. This is not legal, financial, or tax advice. Rules, fees, and deadlines change; confirm with the agency before you file or pay.