Barnhart v. Thomas (2003)

By: Layna Grassi 

Overview 

Barnhart v. Thomas (2003) is a Supreme Court case in which the respondent, Pauline Thomas, a  former elevator operator whose job had been eliminated, argued that she should qualify for  Social Security disability benefits because her old job no longer existed in significant numbers in  the national economy. The petitioner, the Commissioner of Social Security, argued that the Social  Security Administration (SSA) may deny benefits to a claimant who can still do their previous  work without investigating whether that work still exists. The primary issue in this case was  whether people who can still perform their previous jobs are eligible for disability benefits when  those jobs no longer exist in meaningful numbers in the national economy [2]. 

Summary 

Pauline Thomas first worked as a housekeeper, and after a heart attack in the late 1980s left her  unable to continue that work, she then became an elevator operator [2]. She held that job for six  years, until it was eliminated in August 1995 when elevators became automated. In June 1996, at  age 53, she applied for disability insurance benefits and Supplemental Security Income (SSI),  claiming that heart disease and back problems left her disabled [1]. The SSA denied her  application, reasoning that she could still do the duties of her former position, and it held that the  near impossibility of finding such a job did not entitle her to benefits. An Administrative Law  Judge found that her impairments did not prevent her from doing her past relevant work as an elevator operator, and the Judge rejected her argument that the work no longer existed in  significant numbers. The District Court affirmed, but the Third Circuit Court of Appeals  reversed, holding that a claimant's previous work must itself be substantial, gainful work that  exists in the national economy [2]. That conflicted with decisions from four other circuits, which  is why the Supreme Court took the case. 

The dispute turned on the wording of the Social Security Act. A person is disabled only if their impairments are so severe that they cannot do their previous work and cannot, considering their age, education, and work experience, do any other kind of substantial gainful work that exists in  the national economy. Everyone agreed that the phrase "which exists in the national economy"  limits the second category [1]. The question was whether it also limits "previous work" [1]. The  SSA's regulations use a five-step process. At step four, the agency asks whether the claimant can  still do her past work and, if she can, finds her not disabled without asking whether that work  exists in the national economy. The national economy inquiry is saved for step five, where the  agency also considers the claimant's age, education, and work experience [1]. 

In a unanimous decision, Justice Antonin Scalia wrote for the Court and reversed the Third  Circuit's decision [2]. The Court held that the SSA's reading was a reasonable interpretation of  the statute and was therefore entitled to deference under Chevron [2]. It relied on the "rule of the  last antecedent," a grammar principle under which a limiting phrase ordinarily modifies only the  phrase it immediately follows, and it pointed to its earlier use of that rule in FTC v. Mandel  Brothers. Scalia also used an example of parents who warn their teenage son against throwing a  party or doing "any other activity" that damages the house, explaining that the son could not  escape punishment for a party just because no damage occurred [1].

The Court also found a plausible reason for Congress to have drawn the line where the SSA did.  Asking whether a claimant can do their previous work is an efficient stand-in for asking whether  they can do some work in the economy, and the step five inquiry is much harder because it  requires an individual assessment of each claimant's abilities and limitations [1]. The Third  Circuit had objected that the SSA's approach produces unfair results in some cases. The Court  replied that nearly every rule has imperfect applications, and that the question under Chevron is  not whether an agency's reading can lead to undesirable results, since both sides' readings could,  but whether the agency's reading is reasonable. The Court stopped short of deciding that the  statute requires the SSA's interpretation, concluding only that it does not unambiguously require  a different one [1]. 

Impact 

This decision confirmed that the SSA may deny disability benefits at step four of its five-step  process to a claimant who can still do their previous work, even if that work has largely  disappeared from the economy. It gave the agency a way to avoid the more complex  individualized inquiry at step five in many cases, and it reflects the Court's concern for  administrative efficiency in a system that decides millions of claims [1]. The ruling is also an  example of strong deference to an agency's reasonable reading of an ambiguous statute under  Chevron, and of the Court using canons of grammar to resolve what a statute means. Chevron  itself was later overruled in Loper Bright Enterprises v. Raimondo (2024), so the deference  portion of this reasoning no longer controls, although the grammatical and efficiency arguments  remain part of how the statute is understood. For workers, the case means that a past job that has  vanished can still be used against them, so the outcome of a claim can turn on whether they can  do work they did before, not on whether that work still exists.

Court Documents 

Barnhart v. Thomas, 540 U.S. 20 (2003) 

Citations 

[1] "Barnhart v. Thomas, 540 U.S. 20 (2003)." Justia U.S. Supreme Court Center,  supreme.justia.com/cases/federal/us/540/20/. Accessed 20 Oct. 2026. 

[2] "Barnhart v. Thomas." Barnhart v. Thomas | Oyez. Accessed 20 Oct. 2026.