By Evan Reid, Founder of Haul Handbook · Updated Jul 18, 2026
California IRP administration
Who must apportion
The sourced field carries the combined gross weight line: most California-based commercial vehicles at or above it that operate interstate need apportioned registration or trip permits. Lighter vehicles running strictly interstate may be exempt under reciprocal agreements between the states. Purely intrastate trucks register with the DMV the ordinary way and skip the plan entirely.
Basing your fleet in California
California takes the established place of business test seriously. You need a physical location with a street address, a phone listed in the registrant's name, people who conduct the business there, and operational records maintained and available for inspection. The application runs on the carrier and vehicle schedules named in the sourced forms field, including a record-keeping agreement, because apportionment lives and dies on mileage records.
How apportioned fees work
Apportionment splits registration fees by travel share: each jurisdiction collects its fees in proportion to the miles your fleet runs there, instead of every state charging you in full. Run half your miles at home and half next door, and each side collects half its normal registration fee. The DMV issues one plate and a cab card listing the jurisdictions and weights the vehicle is registered for; that card is what roadside enforcement reads.
Renewal
Apportioned fleets renew annually, by midnight on the last day of the assigned registration month. Calendar it: an expired cab card sidelines an interstate truck everywhere at once, not just in California. The DMV's IRP operations office handles the paperwork, and the sourced office field carries the contact details.
What pairs with IRP
The same interstate operation that needs apportioned plates almost always needs an IFTA license through California, and heavy power units owe the federal Form 2290 heavy vehicle use tax before plates renew. To compare how other states run IRP, see the national IRP registration table.
Frequently asked questions
Who needs IRP registration in California?
- California-based commercial vehicles operating interstate at or above the combined gross weight line recorded in the sourced field. Lighter strictly-interstate vehicles may be exempt under reciprocal agreements, and intrastate-only trucks register with the DMV the ordinary way.
How are apportioned registration fees calculated?
- By mileage share. Each member jurisdiction collects its registration fee in proportion to the percentage of your fleet miles run there, so you pay each state a slice instead of paying every state in full.
What does California require before it will base my IRP fleet?
- An established place of business: a physical street address, a phone listed in the registrant's name, people who conduct the business there, and operational records kept on site and available for inspection. The application forms in the sourced field include a record-keeping agreement.
What do I actually receive once I apportion?
- One apportioned plate and a registration certificate called a cab card, issued by California as your base state. The cab card lists every jurisdiction and weight the vehicle is registered for, and it is the document roadside enforcement checks.
When does IRP registration renew?
- Annually. Fleets renew by midnight on the last day of the month of the assigned registration period, and the DMV's IRP operations office in the sourced field handles the process.
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.