An out-of-state commercial vehicle needs a California commercial trip permit before it touches a state highway, and for most trucks that means more than one document. At a minimum, expect a DMV Nonresident Commercial Vehicle Trip Permit (form REG 41). Diesel-powered trucks without an IFTA license also need a California Fuel Trip Permit. Oversize or overweight loads add a Caltrans transportation permit, and carriers hauling property for compensation need a Motor Carrier Permit on top of everything else.
The DMV Trip Permit (REG 41)
The Nonresident Commercial Vehicle Trip Permit stands in for California registration. One permit covers a single commercial vehicle for up to four consecutive days, beginning on the day of first use.1California Legislative Information. California Code VEH 4004 – Commercial Motor Vehicles The fee is $45.2California Legislative Information. California Code Vehicle Code 9260 – Registration Fees
Two categories of vehicle cannot use a REG 41. If the vehicle is based in California, meaning it is primarily dispatched from, garaged, serviced, or maintained at a California address, it needs full California registration instead. Vehicles last registered in Mexico are also ineligible.1California Legislative Information. California Code VEH 4004 – Commercial Motor Vehicles For longer stays, California also offers a 90-day temporary registration, priced at a quarter of what full annual registration would cost.2California Legislative Information. California Code Vehicle Code 9260 – Registration Fees Most short-haul carriers just buy the four-day permit.
The California Fuel Trip Permit
If your truck runs on diesel or another non-gasoline fuel and you don’t hold a valid International Fuel Tax Agreement license, you need a California Fuel Trip Permit (CFTP) in addition to the REG 41. This applies to any “qualified motor vehicle”: two axles with a gross vehicle weight above 26,000 pounds, three or more axles regardless of weight, or a combination exceeding 26,000 pounds. The California Department of Tax and Fee Administration (CDTFA) issues the CFTP.
Each fuel trip permit covers one vehicle for up to four consecutive days and costs $30.3California Department of Tax and Fee Administration. California Revenue and Taxation Code 8708 – Issuance of California Fuel Trip Permit It is valid only for the dates printed on it and cannot be moved to a different vehicle.4California Department of Tax and Fee Administration. California Fuel Trip Permit Gasoline-powered vehicles do not need one.
Caltrans Oversize and Overweight Permits
California’s legal limits on state highways are 80,000 pounds gross weight, 14 feet in height, and 8 feet 6 inches in width. Any non-divisible load exceeding one of those thresholds needs a transportation permit from the California Department of Transportation. A non-divisible load is one that cannot be broken down without destroying its value or intended use.
A Caltrans Single Trip Permit is valid for seven consecutive days and can be issued up to three days before the trip begins.5California Department of Transportation. Single Trip Permit The fee is $16.6Caltrans. Transportation Permits Frequently Asked Questions Maximum permitted width and height depend on the route classification, and loaded height must clear the lowest structure on the permitted route by at least three inches.
Motor Carrier Permit
This is the permit carriers most often miss. California requires any motor carrier of property operating a commercial vehicle on a public highway to hold a valid Motor Carrier Permit (MCP) issued by the DMV.7California Legislative Information. California Code Vehicle Code 34620 The MCP covers motortrucks with two or more axles and a gross vehicle weight rating over 10,000 pounds, along with other vehicles used to transport property for compensation. Operating after an MCP suspension is a misdemeanor punishable by a fine of up to $2,500, jail time of up to three months, or both.8California Legislative Information. California Code Vehicle Code 34660 – Fines and Penalties
Applying requires a California Highway Patrol carrier identification number and proof of workers’ compensation and liability insurance. The application form is the MC 706 M. Anyone hiring a motor carrier in California is also legally prohibited from using one that does not hold a valid MCP.7California Legislative Information. California Code Vehicle Code 34620
Where to Buy Each Permit
The REG 41 is sold at DMV field offices and participating truck stops throughout California. Carriers who cross the state often can buy permits in volume by contacting DMV headquarters. The permit must be completed and dated before the vehicle moves on any California highway.1California Legislative Information. California Code VEH 4004 – Commercial Motor Vehicles
The California Fuel Trip Permit is available through CDTFA online services, at any CDTFA office, and at most DMV offices.4California Department of Tax and Fee Administration. California Fuel Trip Permit Third-party permit services also issue them electronically.
Caltrans oversize and overweight permits are handled through the Caltrans online permit system. Because these permits are route-specific, you need to know your origin, destination, and intended highways before applying.5California Department of Transportation. Single Trip Permit
Information to Have Ready
Whatever permit you’re buying, have this on hand:
- Company name, physical address, and USDOT number
- VIN, make, year, license plate number, and state of registration
- Exact trip start date, since every permit runs for specific consecutive days
- Proof of liability coverage meeting federal and California minimums
For a Caltrans oversize or overweight application, add a description of the load, the number of axles, trailer type, exact height, width, length, and overhang, total gross weight, origin and destination addresses, and any preferred or restricted highways.
Carrying and Displaying the Permits
California law requires the REG 41 to be carried inside the vehicle it covers and placed in the designated permit receptacle where an officer can inspect it.1California Legislative Information. California Code VEH 4004 – Commercial Motor Vehicles A permit that has not been filled out, or is not in the receptacle, is treated as invalid even if it was properly purchased. The fuel trip permit must stay in the cab and be available on demand.4California Department of Tax and Fee Administration. California Fuel Trip Permit Fill everything out before you cross the state line. California enforcement treats incomplete paperwork the same as missing paperwork.
Federal Requirements That Ride Along
State permits do not cover federal obligations, and California weigh stations check for both.
Unified Carrier Registration
Motor carriers, freight brokers, and leasing companies operating across state lines must complete Unified Carrier Registration and pay the annual fee before January 1 of the registration year. Fees scale with fleet size, from $46 for two or fewer vehicles up to $44,836 for fleets over 1,000 vehicles for 2026.9UCR Plan. Fee Brackets The UCR Board recommends that states begin enforcement for the 2026 registration year on January 1, 2026.10Unified Carrier Registration Plan. UCR Dispatch
Heavy Vehicle Use Tax
Any highway motor vehicle with a taxable gross weight of 55,000 pounds or more must have a paid Form 2290 on file with the IRS.11Internal Revenue Service. About Form 2290, Heavy Highway Vehicle Use Tax Return The stamped Schedule 1 is often requested during registration and at weigh stations. Vehicles expected to travel fewer than 5,000 miles during the tax period can claim a suspension but still have to file.
Liability Insurance
Federal minimum financial responsibility for interstate for-hire carriers hauling non-hazardous property in vehicles rated over 10,000 pounds is $750,000.12eCFR. 49 CFR Part 387 – Minimum Levels of Financial Responsibility for Motor Carriers Hazardous materials carriers face significantly higher minimums. California will verify insurance as part of the MCP process, so make sure filings are current before you enter.
Electronic Logging Device Short-Trip Exception
Drivers who use paper logs no more than eight days in any 30-day period are exempt from the federal electronic logging device (ELD) mandate.13Federal Motor Carrier Safety Administration (FMCSA). Electronic Logging Device (ELD) Exemptions, Waivers and Vendor Malfunction Extensions Small carriers that only run into California a handful of times a month can rely on this. Past eight days, you need a compliant ELD installed before you enter the state.