Oversize load permits: what they cost and why every state is different
Why one oversize move needs a permit from every state it crosses, what California charges, and what actually drives the total on a multi-state permit bill.
An oversize load permit is a state's written permission to move a load past its legal size or weight limits. There is no national permit, so every state on the route issues its own. In California, Caltrans charges $16 for a single trip permit. The bigger costs come from each state's travel rules and escort requirements.
Our heavy haul and oversize desk pulls permits for every state on the route and includes them in the quote. Below is how the limits work, what California charges and what moves the total.
When does a load need an oversize permit?
You need a permit as soon as the truck and load together go past a legal limit in any state on the route. In California, Vehicle Code 35100 sets the legal width at 102 inches, and Vehicle Code 35250 sets the legal height at 14 feet, measured from the road surface. On the Interstate system the federal gross weight limit is 80,000 pounds under 23 CFR 658.17. Length limits depend on the trailer and the route, so they are checked load by load.
- 102 IN
- LEGAL WIDTH, CALIFORNIA
- 14 FT
- LEGAL HEIGHT, CALIFORNIA
- 80K LB
- FEDERAL INTERSTATE GROSS
Height is the one shippers miss most often. A machine that measures 10 feet on the shop floor can sit on a flatbed deck and come out well over 13 feet. Measure the load as it will sit on the trailer, not as it sits on the ground. California adds a caution below the limit: under the same section 35250, a vehicle over 13 feet 6 inches may only use highways where it is safe to do so, so tall loads under 14 feet still need a route check.
How much does an oversize permit cost in California?
According to the Caltrans transportation permits FAQ, a single trip permit costs $16 and is valid for seven consecutive days, from one origin to one destination in one direction. An annual permit is $90 for one year and covers set load sizes or specific vehicles on specified highways. A repetitive permit is $90 and covers the same load over the same route for up to 90 days.
- $16
- SINGLE TRIP, 7 DAYS
- $90
- ANNUAL PERMIT
- $90
- REPETITIVE, UP TO 90 DAYS
Two details matter for planning. A single trip permit is one way, so the return trip needs its own permit if the truck is still over size after it drops the load. And Caltrans asks for at least 14 business days to process an annual or repetitive permit, while single trip permits can be issued up to 3 days in advance.
The fee is rarely the biggest number on the bill. What moves the total is everything the permit requires you to do.
Why do oversize permit prices change from state to state?
Each state sets its own fee structure. Some charge a flat fee per trip. Others add charges by weight, by axle or by distance, so a heavy load can cost more to permit than a wide one. Each state also sets its own conditions: which hours and days you can travel, which routes are allowed, and when you need pilot cars.
Those conditions are where the cost comes from. Oversize loads can only move in daylight in most states, and some cities limit hours and days further, so a long route can add a day or more to transit. A route survey, a pilot car or a police escort each add a separate charge. In California, escort requirements depend on the route, and Caltrans publishes pilot car maps and a red route table for this reason.
Take a machine moving from Fremont to Dallas. The trip crosses California, Arizona, New Mexico and Texas, so it needs four permits, each with its own fee, hours and escort rules. Our example lane for that route runs 1,727 miles and takes 5 to 7 days, because transit depends on the permit and escort rules in each state.
WHAT DRIVES THE TOTAL PERMIT COST
- Number of states crossed: one permit per state
- Overweight versus oversize only: weight often costs more
- Travel restrictions: daylight only, no weekends, holiday curfews
- Pilot cars or police escorts required on parts of the route
- Route surveys for very tall or very long loads
- Permit service fees if you do not file yourself
How long does it take to get an oversize permit?
For a standard oversize load, plan on a few days. Superloads over 200,000 pounds, such as transformers and pressure vessels, need four to six weeks, because bridges, clearances and turns on the route are surveyed before the permits are issued. Plan the permit before you book the truck, not after.
“MEASURE THE LOAD ON THE DECK, NOT ON THE FLOOR. THE PERMIT IS WRITTEN FOR THE LOAD AS IT ROLLS.”
Who gets the permit: the shipper or the carrier?
In practice the carrier or its permit service files, because the permit is tied to the truck, the trailer and the exact dimensions. On our moves, dispatch pulls the oversize and overweight permits for every state on the route. The shipper's job is to give accurate weight and dimensions, or drawings, and to say early whether the load can be broken down. A load that can travel in two pieces may not need a permit at all.
The trailer is matched to the load as well: RGNs and lowboys for machinery that drives on and off, stretch and step decks for long or tall pieces, and multi-axle trailers for superloads. While the load moves, the truck reports its position every 15 minutes and calls in at every permit checkpoint.
The other half of the job is the delivery site. If a crane unloads the piece, arrival is set to the day your crane and crew are on site. Our job site delivery checklist covers what to confirm before the truck rolls, and you can see all our freight services for freight that is not oversize.
Oversize permit FAQ
Is one permit good for the whole trip?
No. A move from the Bay Area to Texas needs a permit from every state on the route.
Can I move an oversize load at night?
Only if the permit allows it. Most states restrict oversize travel to daylight hours.
Does an annual permit cover any load?
No. Annual permits cover loads within set dimensions. Bigger loads still need a single trip permit.
What do I need for a quote?
The load's length, width, height and weight as it will sit on the trailer, pickup and delivery addresses, and the date you need it moved.