Does Clean Truck Check apply to out-of-state trucks?

Yes. The program reaches nearly every non-gasoline heavy truck that operates on California public roads, including vehicles registered in other states. Where the truck is plated does not matter; where it runs does. The covered-vehicles table on this page carries the threshold with the official source.

What does compliance actually involve?

Three things on a repeating clock: the vehicle reported in the CTC-VIS database, the annual per-vehicle compliance fee paid, and a passing periodic emissions test submitted before each deadline. All three run through the CTC-VIS portal, and the fee and cadence rows on this page carry the current figures with sources.

What happens if a vehicle falls out of compliance?

California blocks most DMV transactions for that vehicle, so registration renewals stall until testing and fees are current and no enforcement action is open. For a working truck, a registration hold is effectively a parked truck, which is why the deadlines belong on the same calendar as IFTA and IRP renewals.

California CARB Rules for Trucking Companies

By Evan Reid, Founder of Haul Handbook · Updated Jul 18, 2026

California is the one live state on this site with a standing emissions compliance program for trucking companies. The CARB Clean Truck Check program reaches nearly every non-gasoline truck over 14,000 pounds that operates in the state, including out-of-state registered vehicles, and ties compliance to an annual per-vehicle fee, periodic emissions tests, and DMV registration holds.

The program at a glance

Program: Clean Truck Check (Heavy-Duty Inspection and Maintenance program)
Agency: California Air Resources Board (CARB)
Covered vehicles: Nearly all non-gasoline heavy-duty vehicles with a gross vehicle weight rating greater than 14,000 pounds that operate in California, including hybrid trucks and buses, commercial and privately owned vehicles, government vehicles, and vehicles registered outside California.
GVWR threshold: 14,000 lb GVWR (covered when rated above this)
Out-of-state vehicles: Yes
Legal basis: Created by SB 210 (2019) as the Heavy-Duty Inspection and Maintenance regulation; the annual compliance fee is set by 13 CCR 2196.1(f) and adjusted each year for the California CPI.

Reporting, fee, and testing

Where you report: Clean Truck Check Vehicle Inspection System (CTC-VIS) (https://cleantruckcheck.arb.ca.gov/)
What compliance takes: Vehicles are registered and tests are reported in CTC-VIS. Compliance requires reporting the vehicle in the database, paying the annual compliance fee, and submitting passing periodic emissions tests before operating on California public roads.
Annual fee: $32.13 (The annual per-vehicle compliance fee is 32.13 dollars for compliance deadlines on and after January 1, 2026, rising to 33.12 dollars on and after January 1, 2027.)
Testing cadence: Most vehicles test semi-annually (every six months), with deadlines keyed to the DMV registration expiration month for California-registered vehicles or the last VIN digit for out-of-state vehicles. Beginning October 2027, OBD-equipped vehicles move to testing four times per year; motorhomes and agricultural vehicles stay annual.
Test types: OBD-equipped vehicles (2013 and newer diesel engines, 2018 and newer alternative fuel engines) get an OBD scan by a CARB-credentialed tester; 2012 and older diesel engines take a smoke opacity test plus a visual emissions control inspection.
Early submission: Tests may be submitted up to 90 days before the deadline.
Enforcement: Noncompliance blocks most California DMV vehicle transactions: the vehicle must be compliant, with no tests or fees due within 90 days of its compliance deadline and no open CARB enforcement actions, before DMV registration can proceed.

The fee figure above is the current-deadline amount from CARB's fee schedule; the fee detail row carries the scheduled change alongside it, so the two never drift apart.

Where TRUCRS went

The former Truck and Bus Regulation reporting system (TRUCRS) largely sunset as the fleet turnover deadlines completed in January 2023. Clean Truck Check, reported through CTC-VIS, is the active statewide emissions compliance program for heavy vehicles; TRUCRS history is context only and no fact from the retired program renders on the page.

Where CARB fits in the California stack

Clean Truck Check sits alongside the CA number and Motor Carrier Permit covered in California intrastate authority, and its deadlines belong on the same compliance calendar as the credentials in start a trucking company in California. The rest of the state's permit landscape lives in California trucking permits.

Frequently asked questions

Does Clean Truck Check apply to out-of-state trucks?: Yes. The program reaches nearly every non-gasoline heavy truck that operates on California public roads, including vehicles registered in other states. Where the truck is plated does not matter; where it runs does. The covered-vehicles table on this page carries the threshold with the official source.
What does compliance actually involve?: Three things on a repeating clock: the vehicle reported in the CTC-VIS database, the annual per-vehicle compliance fee paid, and a passing periodic emissions test submitted before each deadline. All three run through the CTC-VIS portal, and the fee and cadence rows on this page carry the current figures with sources.
What happens if a vehicle falls out of compliance?: California blocks most DMV transactions for that vehicle, so registration renewals stall until testing and fees are current and no enforcement action is open. For a working truck, a registration hold is effectively a parked truck, which is why the deadlines belong on the same calendar as IFTA and IRP renewals.
Is TRUCRS still a thing?: The old Truck and Bus Regulation reporting system largely wound down after its fleet turnover deadlines completed. Clean Truck Check, reported through CTC-VIS, is the active statewide emissions compliance program a new carrier deals with today; this page renders no requirement from the retired program.

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.