A chip truck towing a chipper is one vehicle on the freeway and two very different machines at the curb. The insurance tends to follow that split, and the gaps often show up where owners assume one policy covers both.
Quick answer
On the road, the chip truck and the chipper behind it are generally covered by your commercial auto policy, provided both are on it. Once the chipper is running at the curb, injury and damage from the work usually belong to general liability and workers' comp. Pick a home for each chipper, either the auto schedule or an equipment policy, and never leave it on neither.
The chip truck anchors most tree crews: a medium-duty chassis with a high, enclosed chip box that dumps, frequently paired with a crew cab, towing a drum or disc chipper on a pintle or ball hitch. In the morning it carries the crew, the saws and the rigging to the job. At the job it becomes a parking spot, a debris bin and a platform for the work. In the afternoon it hauls a box of chips to a dump site, a mulch yard or a customer who asked for them.
A typical business auto policy treats those three uses differently. The drive is auto. The chipping is mostly not. The haul out is auto again, with a load that can blow out of the box if it isn't covered. State law generally expects a vehicle to be constructed, covered or loaded so its contents can't escape, which for a chip box points to a tarp or net before any highway miles. Owners tend to run into trouble when they assume the truck's auto policy picks up everything the rig does or when a chipper bought after the policy was written ends up insured nowhere.
Schedule the truck with the box included in its value, since a custom chip body can be a large share of the replacement cost. The rating matters for drivers: Chip trucks tend to come in two builds, just under 26,001 lbs GVWR, so crew members with regular licenses can generally drive them, or well above it to carry bigger loads. Add a chipper, and the combination may need a license class of its own: DMV's Class A generally applies to combinations rated at 26,001 lbs or more when the towed unit is rated over 10,000 lbs. California truck insurance requirements explains where the other thresholds sit.
Towed down the street, a chipper is usually treated like a trailer. Liability generally follows the truck while it's hitched, though it's worth confirming how your auto form treats a towed chipper that isn't on the schedule. Theft or collision damage to the chipper is typically covered on the auto policy only if it's listed with its VIN and value. Our page on equipment trailer insurance explains how towed units are listed.
Once the feed table is down and the drum is turning, the chipper is a machine. A crew member hurt feeding brush is generally a workers' comp claim. A chip thrown through a parked car's window, or a branch whipped out of the infeed into a passerby, is usually general liability, since most auto forms carve out injury from running equipment attached to the vehicle. A blown engine or a cracked drum typically isn't covered by auto physical damage either, since mechanical breakdown is a common exclusion.
Some owners insure chippers on the auto schedule as trailers; others put them on an equipment floater that can cover them on the road, at the curb and in the yard. Either can work. A chipper bought midyear and added to neither does not.
A tree service runs two crews. Crew one has a crew-cab chip truck rated just under 26,001 lbs and a small drum chipper. Crew two has a larger chip truck rated around 33,000 lbs, a bigger chipper and a forestry bucket truck. The company also owns a stump grinder on a trailer and two pickups for the owner and the estimator.
| Unit | Auto schedule | Equipment policy | Notes |
|---|---|---|---|
| Chip truck, under 26,001 lbs | Yes, with the box in its value | No | Crew members with regular licenses may drive it |
| Chip truck, about 33,000 lbs | Yes, with the box in its value | No | Commercial-license drivers only |
| Small chipper | Yes, as a trailer | No | Rarely leaves the truck it's paired with |
| Large chipper | No | Yes, on the floater | Covered on the road, at jobs and in the yard; auto carrier told it's towed |
| Forestry bucket truck | Yes, with the aerial device in its value | No | Work aloft usually goes to general liability |
| Stump grinder and trailer | The trailer | The grinder | Two items on two policies |
| Two pickups | Yes | No | Owner and estimator |
The table doesn't argue that one approach is right. It shows that every unit has a home and the owner knows which policy to call when something happens. Here the large chipper sits on the floater because the owner wanted one policy covering it on the road, at jobs and in the yard, including the weeks it's parked at a long job; the small chipper rides on the auto schedule because it never leaves its truck. Both choices can hold up. Leaving the large chipper on neither, which is what we found when we first reviewed the account, didn't.
Two of those habits line up with Cal/OSHA's tree work rules. As those rules generally read, a trailer chipper unhitched from its truck should be chocked or otherwise secured, and each brush chipper needs a locking device on its ignition so nobody can start it without authorization.
Electrical contractors deal with the bucket-truck half of this fleet; see what electrical contractors should know about bucket truck and van coverage. Landscapers wrestle with the same truck, trailer and equipment split on their mow trailers; see how landscapers handle trailers and the gear on them. For the full account, including bucket trucks and roadside work, see our page on arborist fleet insurance.
Get a quote for your chip trucks and chippers with each unit's VIN and value ready.
Usually not. On a tree service's chipper, a blown engine or cracked drum counts as mechanical breakdown, which auto physical damage forms exclude even when the chipper is scheduled. Scheduling it can pay for theft, fire and collision damage.
Tree services that buy a chipper after the policy is written sometimes never add it to the auto schedule or an equipment floater. If it's stolen from the yard or a long job, neither policy is likely to pay for it.
Chip trucks are commonly built just under 26,001 lbs GVWR or well above it, and a heavy chipper can push the combination into another license class. A broker will ask which crew members may drive which pairing, in writing.
When chips blow out of an uncovered box and crack a windshield on the freeway, the claim usually lands on the tree service's auto policy. Covering or netting the box for highway trips helps keep those small claims off the loss runs.
Official resources
Requirements change without notice. Confirm what applies to your fleet with the agency before relying on it.
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Have ready: vehicle list with VINs, driver list, current declarations page, loss runs.
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