Illinois Second Division Vehicles: Plates, Weight Tax, and CDL Rules

In Illinois, second division vehicles are motor vehicles designed to haul property, freight, or cargo, carry more than ten passengers, or serve as living quarters. The classification is set by 625 ILCS 5/1-217 and turns on how the vehicle was built, not how you use it, so a pickup truck driven only for commuting sits in the same category as a moving van or a school bus.¹ That classification then drives everything else: your plate, your annual tax, whether you need a safety inspection, and whether the driver needs a CDL.

What Puts a Vehicle in the Second Division

Illinois splits every motor vehicle into two groups. The first division is anything designed to carry ten or fewer people. The second division catches everything else, plus any first division vehicle that has been remodeled for second division use.¹

The statute hinges on the word “designed.” A pickup with a cargo bed was built to carry property, so it lands in the second division even if the owner never hauls anything. The same reasoning covers cargo vans, tow trucks, box trucks, RVs, motor homes, motorcoaches, and school buses. Once a vehicle is in the second division, the rules below apply regardless of whether it is used commercially or for personal purposes.

Plate Classes and the Flat Weight Tax

Every second division vehicle registered in Illinois gets a plate letter tied to its gross weight, meaning the vehicle’s own weight plus the maximum load it will carry. The flat weight tax under 625 ILCS 5/3-815 already includes a $10 registration fee inside each tier.² The current annual fees:

Class B (8,000 lbs and under): $148
Class C (8,001–10,000 lbs): $218
Class D (10,001–12,000 lbs): $238
Class F (12,001–16,000 lbs): $342
Class H (16,001–26,000 lbs): $590
Class J (26,001–28,000 lbs): $730
Class K (28,001–32,000 lbs): $942
Class L (32,001–36,000 lbs): $1,082
Class N (36,001–40,000 lbs): $1,302
Class P (40,001–45,000 lbs): $1,490
Class Q (45,001–50,000 lbs): $1,638
Class R (50,001–54,999 lbs): $1,798
Class S (55,000–59,500 lbs): $1,930
Class T (59,501–64,000 lbs): $2,070
Class V (64,001–73,280 lbs): $2,394
Class X (73,281–77,000 lbs): $2,722
Class Z (77,001–80,000 lbs): $2,890

An owner who registers the vehicle as a Special Hauling Vehicle pays an added $125 on top of the flat weight tax for that class.²

The gross weight you declare at registration locks in your plate class and your tax for the year. Guessing low to save money almost never works out, because Illinois stacks fines on overweight violations that quickly outrun the savings.

How to Register

Operating a second division vehicle on Illinois roads requires paying the correct registration fees and flat weight tax for the gross weight the vehicle will actually carry.³ The core paperwork is the Application for Vehicle Transaction (Form VSD 190), available at any Secretary of State facility or on the Secretary of State’s website. You also need the original title or other valid proof of ownership and a completed tax form, usually RUT-25 or RUT-50, showing that sales or use tax has been paid.

On the VSD 190 you declare the gross weight at which the vehicle will operate. That number sets your plate class and your tax, so accuracy matters. The Secretary of State will reject applications missing accurate weight information or proof of tax payment.

A vehicle is only eligible for Illinois registration if it was originally manufactured for highway use, is a modification of a highway-manufactured vehicle, or was assembled from components designed for highway vehicles.³ Off-road equipment never built for the road does not qualify.

You can file in person at a Secretary of State facility for same-day processing, or mail the package to Springfield with a check or money order. Once approved, the state issues weight-designated plates matching your declared class.

Safety Inspection Requirements

Most heavier second division vehicles need periodic safety testing, but the cutoff is higher than many owners assume. Under 625 ILCS 5/13-101, the mandatory inspection applies to second division vehicles registered for a gross weight of 10,001 pounds or more, and to any vehicle towing a trailer with a gross weight above 10,000 pounds.⁴ A narrower category also brings in property-carrying vehicles used in commerce registered between 8,001 and 10,000 pounds. School buses, tow trucks, medical transport vehicles, and motor buses have to be inspected no matter the weight tier.

The statute exempts semitrailers and trailers with a gross weight of 5,000 pounds or less (vehicle weight plus maximum load), and second division vehicles registered at 10,000 pounds or less are generally exempt unless they tow a trailer above the 10,000-pound line.⁴

A vehicle that passes gets a Certificate of Safety that must be displayed at all times during operation. The certificate shows the month of the next required inspection. Passing does not immunize the owner from later prosecution if the vehicle is found unsafe under other provisions of the Vehicle Code.

Operating a second division vehicle without a valid Certificate of Safety is a petty offense with a minimum fine of $95 and a maximum of $250. If the violation happens during a crash, it becomes a Class C misdemeanor.⁵

Penalties for Running Overweight

If a vehicle is caught exceeding its registered weight or a posted road limit, Illinois fines start at $100 and climb quickly:⁶

Up to 2,000 lbs over: $100
2,001–2,500 lbs over: $270
2,501–3,000 lbs over: $330
3,001–3,500 lbs over: $520
3,501–4,000 lbs over: $600
4,001–4,500 lbs over: $850
4,501–5,000 lbs over: $950
Over 5,000 lbs: $1,500 for the first 5,000, plus $150 for each additional 500 lbs

Repeat offenders take an additional $5,000 penalty on the fourth and every later conviction within any 12-month window. For businesses, that 12-month count runs per driver, not across the fleet.⁶ Registering at the right weight class up front is almost always cheaper than paying a citation.

When the Driver Needs a CDL

A second division vehicle by itself does not require a CDL. The trigger is a combination of size, capacity, or cargo type under 625 ILCS 5/6-500, which mirrors the federal definition of a commercial motor vehicle:⁷

A gross vehicle weight rating of 26,001 pounds or more for a single vehicle
A gross combination weight rating of 26,001 pounds or more when the towed unit’s GVWR is over 10,000 pounds
Designed to carry 16 or more passengers, including the driver
Any size vehicle transporting hazardous materials requiring placards

The federal CDL classes track those thresholds. Class A is combination vehicles at 26,001 pounds or more with a towed unit over 10,000 pounds. Class B is single vehicles at 26,001 pounds or more, such as large straight trucks and buses. Class C is smaller vehicles carrying 16 or more passengers or placarded hazardous materials.⁸

Recreational vehicles used for personal purposes, military vehicles driven by active-duty personnel, and government-owned emergency vehicles fall outside the Illinois CDL definition.⁷ Every other driver of a qualifying vehicle needs the right class and any endorsements the load or vehicle calls for, such as a passenger endorsement.

CDL holders also have to keep a valid DOT medical examiner’s certificate from a provider on the FMCSA National Registry. The standard certificate lasts up to 24 months, though conditions like high blood pressure can shorten it.⁹

If You Cross State Lines

An Illinois registration and a Certificate of Safety are enough for a vehicle that stays inside the state. The moment operations cross state lines, or the cargo you deliver is later shipped out of state, federal rules layer on top of the Illinois ones.

USDOT Number

Any company operating commercial vehicles in interstate commerce must register with the Federal Motor Carrier Safety Administration and get a USDOT number. It applies to vehicles with a GVWR or gross combination weight of 10,001 pounds or more, vehicles designed to carry more than eight passengers for compensation, and any vehicle transporting placarded hazardous materials.¹⁰

Illinois does not currently require a USDOT number for vehicles registered under the flat weight tax system for purely intrastate work. The Illinois Secretary of State has noted that federal rules are under review and the requirement may expand. If the commodity you deliver is later shipped out of state, you may already need a USDOT number and Unified Carrier Registration even if your own truck never leaves Illinois.¹¹

Unified Carrier Registration

Motor carriers, freight forwarders, brokers, and leasing companies in interstate commerce have to register annually under the UCR program. The 2026 fees scale with fleet size, starting at $46 for carriers with two or fewer vehicles.¹²

Electronic Logging Devices

Drivers of commercial motor vehicles subject to hours-of-service rules must run an FMCSA-registered Electronic Logging Device. As of April 2026, using a revoked ELD or swapping in paper logs improperly results in an out-of-service order at roadside inspections.¹³ Drivers who stay within 150 air miles of their reporting location under the short-haul exemption are not required to use one. Agricultural haulers have their own carve-outs, including drivers of pre-2000 model year vehicles and covered farm vehicles.¹⁴

Insurance Minimums

Federal minimum liability insurance kicks in for interstate carriers. For-hire general freight carriers must hold at least $750,000 in bodily injury and property damage coverage. Carriers of oil and certain hazardous waste need $1,000,000, other hazardous substance carriers $5,000,000, and passenger carriers with seating for 16 or more $5,000,000.¹⁵ These sit on top of Illinois’s own liability insurance rules.

Federal Weight Limits

On the Interstate Highway System, 23 U.S.C. § 127 caps a single axle at 20,000 pounds, a tandem axle (two axles spaced more than 40 inches but no more than 96 inches apart) at 34,000 pounds, and any five-or-more-axle combination at 80,000 pounds gross.¹⁶ A legal Illinois plate class near the federal ceiling does not automatically satisfy the federal Bridge Formula on axle spacing, so heavy operators should confirm compliance before loading.

Federal Annual Inspection

Commercial motor vehicles under FMCSA jurisdiction must pass an annual inspection covering 15 component categories under 49 CFR Part 396, Appendix A. This is separate from the Illinois state safety test, though many items overlap.¹⁷ Vehicles that run only inside Illinois answer to the state program; those that cross state lines answer to both.

1
Illinois General Assembly. Illinois Code 625 ILCS 5/1-217
2
Illinois General Assembly. Illinois Code 625 ILCS 5/3-815
3
Illinois General Assembly. Illinois Code 625 ILCS 5/3-401
4
Illinois General Assembly. Illinois Code 625 ILCS 5/13-101
5
Illinois General Assembly. Illinois Code 625 ILCS 5/13-111
6
Illinois General Assembly. Illinois Code 625 ILCS 5/15-113
7
Illinois General Assembly. Illinois Code 625 ILCS 5/6-500
8
eCFR. 49 CFR 383.91 – Commercial Motor Vehicle Groups
9
Federal Motor Carrier Safety Administration. DOT Medical Exam and Commercial Motor Vehicle Certification
10
Federal Motor Carrier Safety Administration. Do I Need a USDOT Number?
11
Illinois Secretary of State. Commercial and Farm Trucks
12
Unified Carrier Registration. UCR Home
13
Federal Motor Carrier Safety Administration. ELD News and Events
14
Federal Motor Carrier Safety Administration. ELD Hours of Service (HOS) and Agriculture Exemptions
15
Federal Motor Carrier Safety Administration. Financial Responsibility Study
16
Office of the Law Revision Counsel. 23 USC 127 – Vehicle Weight Limitations – Interstate System
17
eCFR. 49 CFR Part 396, Appendix A – Minimum Periodic Inspection Standards