How Insurance Agent/Broker Expert Witnesses Get Excluded Under Daubert — and How to Survive the Cross

Daubert is not a medicine problem. Under Kumho Tire and the 2023 amendment to Federal Rule of Evidence 702, the trial court's gatekeeping applies to every form of specialized testimony — insurance agent/broker included. A 20-year study of 2,842 challenges to non-medical experts found that roughly half of those opinions were excluded or partially excluded, and the single most-cited reason was “unreliable methodology.”

The exclusion rarely happens in a written motion alone. It is built, piece by piece, in the deposition cross-examination — where opposing counsel walks a insurance agent/broker expert into conceding scope, methodology, or an assumption that unravels the whole opinion. Here are the three traps, and how a prepared expert answers each one.

The three ways insurance agent/broker experts lose ground

Scope: testifying outside your lane

The cross-examiner's question sounds simple:

You opine the agent failed to procure adequate coverage — but you've never sold this exact line, have you?

Why it works: The line/scope attack. Anchor to the procurement standard of care.

A stronger answer: “I apply the agent/broker standard of care for procurement and advising, which is general to the practice, to the documented file; I cited the standards.”

Methodology: the reliability attack

The cross-examiner's question sounds simple:

Your opinion relied on the agent file — you didn't ask the agent what the client requested, did you?

Why it works: Methodology / record basis.

A stronger answer: “I analyzed the documented requests and the agent's conduct against the standard, the proper basis, and noted that limit.”

Assumptions: the one premise that sinks the opinion

The cross-examiner's question sounds simple:

You assume the client asked for the broader coverage — but the file is silent, isn't it?

Why it works: The request assumption. Tie to records.

A stronger answer: “Where the record didn't establish the specific request, I said so and analyzed the duty under the applicable standard.”

How to prepare for the cross before you're sworn in

Every one of those traps is defeatable — but not by reading your report one more time. The experts who survive the cross have done three things:

• Rehearsed the cross-examination out loud, repeatedly, against a realistic examiner — so the scope concession, the methodology defense, and the assumption hedge are second nature.
• Mastered the record, so that when counsel asks them to recall the one line buried in thousands of pages of the application, policy, and agent file, they can produce it in seconds rather than fumble.
• Stress-tested the report against FRE 702 — finding the reliability gaps before opposing counsel does.

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