Every tow policy has a liability piece that pays for the harm your truck does to other people. That part is the same as any commercial auto policy. What makes towing insurance its own animal is the coverage for the vehicles you handle, someone else's property, hooked to your truck or sitting in your yard. That job is split between two coverages, on-hook and garagekeepers, and the single most common mistake we see is an operator carrying one and assuming it covers the other. Here is exactly what each one does.
On-hook: while it is attached to your truck
On-hook coverage (also called in-tow coverage) pays for physical damage to the vehicle you are towing or hauling while it is on the hook, on the bed, or being winched. It is the towing version of motor truck cargo, because for a tow operator the "cargo" is a customer's vehicle. If you drop a car loading it, jackknife a unit you are pulling, or a vehicle catches fire mid-tow, on-hook is the coverage that responds.
- Typical limits run $50,000 to $100,000, and operators who move exotics, heavy equipment, or multiple cars carry more.
- It applies only while the vehicle is in transit or being loaded and unloaded, not once it is parked at your shop.
- Like any physical damage coverage, it carries a deductible and is written on the value of what you carry.
The trap: a low on-hook limit looks fine until you hook a $90,000 pickup or a piece of construction equipment and total it. Match your limit to the most valuable thing you realistically tow, not the average.
Garagekeepers: once it is in your custody
Garagekeepers coverage picks up where on-hook stops. It pays for damage to customer vehicles in your care, custody, and control while they sit on your lot, in your shop, or in your impound yard. It responds to fire, theft, vandalism, weather, and an on-lot accident like a backing collision. If you store vehicles at all, even overnight before a customer picks up, this is core coverage, not an add-on.
Garagekeepers comes in a few forms worth knowing:
- Legal liability: pays only when the damage is your fault (you are legally liable). Cheaper, but leaves gaps for theft or vandalism you could not have prevented.
- Direct primary: pays for covered damage regardless of fault, and pays before the customer's own insurance. This is what most towing and impound operations actually want.
- Direct excess: pays after the customer's own coverage.
For an impound or storage-heavy operation, direct primary is usually the honest fit, because you are holding vehicles whose owners may have no insurance at all.
The gap in the middle
Picture the handoff. You winch a wrecked car onto your flatbed (on-hook covers it). You haul it to your yard and unhook it (on-hook ends). It sits overnight waiting for the insurance adjuster (garagekeepers covers it). A fire in your lot that night is a garagekeepers claim, not on-hook, and if you only carried on-hook, you are paying out of pocket.
That is the exact seam operators fall through: they buy one coverage, handle both phases of the work, and discover the gap only when a parked vehicle is damaged. Any operation that both tows and stores needs both coverages, sized to the work. We break down where these sit in the full package in our tow truck insurance requirements and cost guide, and how they differ from freight motor truck cargo.
What drives the price
- On-hook limit and what you tow. Higher limits and higher-value vehicles cost more. Exotic and heavy-equipment transport prices above standard consumer towing.
- Garagekeepers form and lot size. Direct primary costs more than legal liability, and a large impound yard holding dozens of vehicles is a bigger exposure than a shop that stores two cars overnight.
- Deductibles. Taking a higher deductible on both lowers your fixed cost, a controlled way to trim premium.
- Your losses and your drivers. A clean loss run and experienced operators move the rate more than anything else.
How McClure helps
We build tow policies the way the work actually runs: on-hook sized to the heaviest thing you pull, garagekeepers written in the form that fits whether you store one car or a full impound yard, and the liability underneath it all placed with the specialty tow markets that price this class fairly instead of running from it. Tell us what you tow and whether you store, and we will make sure there is no gap in the middle.