Insurance actuary
Expert class library · Insurance · Either side
Applies actuarial methods such as loss development, mortality experience studies, and rate adequacy analysis to questions about reserves, premiums, cost of insurance charges, and expected losses in coverage, reinsurance, and rate disputes. Courts look for analysis that follows recognized actuarial standards of practice and that stays within the opinions actually disclosed and supported in the expert's report.
What this expert is retained to answer
- Were the insurer's rate or cost of insurance increases actuarially justified by changes in its expectations about mortality, investment earnings, persistency, or expenses?
- Did the insurer treat policyholders in the same actuarial class consistently?
- How did actual deaths or losses compare with what the assumptions predicted, and what does the actual-to-expected ratio show?
- Were reserves adequate given loss development patterns and incurred but not reported claims?
- What allowance for reinsurance cost or catastrophe risk belongs in a proposed rate?
Methods
- Loss development triangles
- Reserve adequacy analysis
- Rate adequacy review
- Loss projection modeling
How the testimony is attacked
- Opinions beyond the report or without calculations. Opponents seek to bar testimony on theories the actuary never analyzed. In U.S. Bank v. PHL Variable Life Insurance the court barred the insurer's actuary from testifying that some rate increase was inevitable under other assumptions, because his report contained no such opinion or supporting calculations.
- Unreliable or after-the-fact assumptions. Challengers argue the actuary relied on original pricing assumptions that were reconstructed later rather than documented at the time. The PHL Variable court held that attacks on the factual inputs to an otherwise reliable method go to weight and are for cross-examination.
- No recognized standard for the analysis. Defendants argue there is no accepted method for the actuarial comparison offered. In SEC v. Life Partners Holdings the Fifth Circuit upheld admission of an actuary's actual-to-expected mortality analysis because it could be measured against a published Actuarial Standard of Practice.
- Hindsight analysis instead of method review. Opponents contend that judging estimates by how they turned out says nothing about whether they were reasonable when made. The Life Partners court rejected that relevance attack where the issue was whether the estimates were systematically short and whether the defendants knew it.
- Lack of specialized experience in the subject. Parties challenge actuaries who have never priced the particular product, such as reinsurance. In State ex rel. Commissioner of Insurance v. North Carolina Rate Bureau the court held that an actuary with a reinsurance designation and rate case experience was competent to testify on reinsurance cost.
What the public record shows
A deliberately narrow CourtListener search, actuar* AND reserves AND "expert testimony" AND (Daubert OR "Rule 702"), returned 20 opinions filed since 2015, as of October 2, 2026; broader searches return more. Three that show how courts handle this class of testimony:
| Outcome | Case | Court | Why |
|---|---|---|---|
| Limited | U.S. Bank National Ass'n v. PHL Variable Life Insurance112 F. Supp. 3d 122 | S.D.N.Y. 2015 | The court let the insurer's actuary defend the cost of insurance increases, treating disputes over his original assumptions as weight, but barred him from asserting that a rate increase was inevitable under other assumptions because that opinion was neither disclosed nor supported by any calculation. |
| Admitted | Securities & Exchange Commission v. Life Partners Holdings, Inc.854 F.3d 765 | 5th Cir. 2017 | The Fifth Circuit held the district court did not abuse its discretion in admitting the SEC's actuary, whose actual-to-expected mortality analysis showing systematically short life expectancy estimates could be checked against a published actuarial standard of practice. |
| Admitted | State ex rel. Commissioner of Insurance v. North Carolina Rate Bureau791 S.E.2d 211 | N.C. Ct. App. 2016 | Rejecting a challenge under North Carolina Rule 702 and Daubert, the court held that the actuarial consultant was competent to testify on the net cost of reinsurance in a homeowners rate case because of his reinsurance designation and rate case experience. |
Each case links to the free opinion text on CourtListener.
Under amended Rule 702
Since December 1, 2023, Rule 702 says expressly that the party offering an expert must show the court it is more likely than not that the testimony meets each requirement: that it rests on sufficient facts or data, uses reliable methods, and reflects a reliable application of those methods to the case. Questions about the basis of an opinion are no longer automatically matters of weight for the jury. For how the circuits have applied the amendment, see the Rule 702 tracker, which follows each court of appeals; for what that means for preparing or attacking this class of expert, see the guide on amended Rule 702.
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Last reviewed October 2, 2026. How this page is built: rulings are found by searching court opinions on CourtListener, and each one is read in the opinion before it is summarised here; outcomes are labelled by what the court did with the expert's testimony. No individual expert is named. This page summarises public decisions for orientation and is not legal advice; read the opinion before relying on any ruling.