If your ERISA disability, life, health, or retirement benefit claim was denied, one phrase can quietly shape almost everything that happens next: standard of review.
That phrase sounds technical, but it often answers a practical question people care deeply about: How closely will a court examine the denial? In some cases, the judge takes a fresh look at the record. In others, the judge gives the plan administrator a great deal of leeway. That difference can affect how a denial is challenged, how an administrative appeal is built, and what evidence matters most.
In this post you’ll learn what the ERISA standard of review is, where it comes from, why plan language matters so much, how conflicts of interest fit into the analysis, and why many ERISA cases are won or lost before the lawsuit is even filed. If you want a broader foundation first, this overview of how federal courts compare de novo review with abuse-of-discretion review under ERISA can help frame the bigger picture.
<aside> 💡 Scroll to the bottom for every post in this series.
</aside>
In plain English, the standard of review is the rule a court uses to evaluate a benefits decision.
Under ERISA, the modern framework starts with the U.S. Supreme Court’s decision in Firestone Tire & Rubber Co. v. Bruch. The Court explained that a denial of benefits under ERISA is reviewed de novo unless the plan gives the administrator or fiduciary discretionary authority to determine eligibility for benefits or interpret plan terms. When that kind of discretionary language exists, courts often apply a more deferential standard often described as abuse of discretion or arbitrary and capricious review. Cornell’s summary of MetLife v. Glenn and the Supreme Court materials in Firestone reflect that basic structure.
For claimants, that distinction is not just academic:
Here’s what this often means in real life: the same medical file, the same denial letter, and the same plan terms can look very different depending on which review standard applies.
One of the first questions in many ERISA denial cases is not “Was the denial fair?” but “What does the plan actually say about decision-making authority?”
That is because Firestone ties deference to the plan’s grant of discretion. If the governing plan document gives the administrator authority to interpret plan terms or decide eligibility, that language often becomes the reason a court uses a deferential standard. If the plan lacks that language, de novo review is often the starting point. The Supreme Court’s reasoning in Firestone remains the anchor for that analysis.
This is also why experienced ERISA litigators often focus immediately on the actual governing documents, not just the denial letter or a summary booklet. That distinction matters because the Supreme Court later explained in CIGNA Corp. v. Amara that a summary plan description, by itself, is not the plan. Cornell’s discussion of the case notes the Court’s view that information provided in a summary plan description is not itself part of the governing plan document, even though ERISA separately requires SPDs to clearly explain rights and limitations. See 29 U.S.C. § 1022 and 29 C.F.R. § 2520.102-2.
That creates a common source of confusion. People often receive: