What is the difference between umbrella and excess liability for trucking?

An umbrella usually sits over several primary policies at once and can sometimes cover a claim they do not. Follow-form excess simply extends one policy’s terms upward with no broader coverage. Large fleets often carry an umbrella as the first layer and follow-form excess above it. What matters most is that every layer responds to the same claims as the primary.

Does the MCS-90 apply to excess layers?

The MCS-90 is an endorsement on the primary policy that guarantees the public the federal minimum, even where the policy would otherwise not pay. It does not raise the limit and it does not attach to the excess layers. The excess tower is governed by its own terms.

Our shipper wants $5 million. Can that be primary plus excess?

Usually, yes. Most contracts that require a total liability limit accept a primary policy plus excess or umbrella layers that reach it, provided the certificate shows each layer and the excess follows the primary’s terms. Read the contract for words such as primary and noncontributory or per-occurrence, because those can change what qualifies.

Do hazmat fleets need more?

The federal floor is higher: $1,000,000 for oil and most hazardous materials and $5,000,000 for hazardous substances carried in bulk, under 49 CFR 387.9. Those are minimums for the filing. The excess decision above them follows the same logic as any other fleet, with the added severity of a release.

A tractor-trailer running a divided highway at sunrise seen from the shoulder, a mile marker in the foreground and open road stretching to the horizon

How much excess liability does a trucking fleet need?

No regulation sets it. The federal minimum for nonhazardous freight is $750,000, and most fleets carry a $1,000,000 primary policy with excess layers above it. The total is a decision driven by the contracts you sign, the states and venues you run through, what the business could pay out of its own assets, and what each added layer costs. Trucking verdicts have grown far faster than inflation, which is why the question deserves a deliberate answer.

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What an excess tower is

A tower is the stack of liability policies above the primary auto policy. The primary pays first, usually up to $1,000,000. A first excess layer pays the next amount, a second layer pays above that, and so on. Each layer may come from a different insurance company, and each pays only after the one beneath it is exhausted.

An umbrella usually sits over several primary policies at once (auto, general liability, employer’s liability) and may cover some claims the primaries do not. A follow-form excess policy simply extends the primary policy’s terms upward. Large fleets often use both: an umbrella as the first layer and follow-form excess above it.

Nuclear verdicts and why excess costs what it does

A nuclear verdict is a jury award far beyond what the injury would ordinarily produce, commonly described as one over $10 million. ATRI’s 2020 study of trucking cases found award sizes growing by roughly half each year over the period it measured. The study is disputed by plaintiffs’ attorneys, but the direction is reflected in what excess layers cost.

Factors that tend to raise a verdict are documented across trucking litigation: evidence that a company ignored its own safety rules, hours-of-service violations, a driver who should not have been hired, and missing or deleted records. The defense that works best is built long before the crash, in the qualification file, the maintenance records and the camera footage.

The detail

For-hire motor carriers of nonhazardous property in interstate commerce, in vehicles of 10,001 pounds or more, must carry at least $750,000 of public liability; oil and most other hazardous materials require $1,000,000, and hazardous substances carried in bulk require $5,000,000.
49 CFR 387.9, minimum levels of financial responsibility
ATRI’s 2020 study of about 600 trucking cases from 2006 to 2019 found that the size of verdict awards grew 51.7 percent a year between 2010 and 2018, and that cases over $1 million rose from 26 in the first five years of its data to nearly 300 in the last five.
American Transportation Research Institute, Understanding the Impact of Nuclear Verdicts on the Trucking Industry (June 2020)

What this means for you

Contracts set the floor. A shipper or broker agreement that requires a total limit makes that figure the minimum, and it has to be met by policies that actually respond to the contract’s claims.
Venue matters as much as miles. A crash is usually tried where it happened or where the company is based. Running through states with large verdict histories is a reason to carry more.
Every layer must fit the one beneath it. An excess policy that follows the primary’s terms leaves no gap. One with its own exclusions can leave a claim that the primary paid and the excess refuses.
The top layers are cheaper per dollar. Each layer is less likely to be reached than the one below it, so the price per million usually falls as the tower rises. That makes the last few million cheaper than the first excess million.
An uninsured verdict is paid from the business. Anything above the tower is the fleet’s own money and, depending on structure, possibly its owners’. Size the tower against what the company could actually survive.

Need this handled?

Reading about it and having it handled are different jobs, and the second one is ours. We place the accounts other brokers decline — claims history, a cancellation, an unusual operation, a business nobody wants to underwrite twice — and we will tell you when the policy you already have is the right one. Tell us the situation and a licensed human replies the same business day.

Lori takes on only a few large fleets at a time, so each one gets a full renewal: the submission built properly and shopped with every insurance company that fits. Two openings remain for the rest of 2026.