CSX Transportation, Inc. v. Alabama Department of Revenue
The Supreme Court ruled that CSX Transportation could sue Alabama under a federal railroad tax law, even though the challenged taxes were sales and use taxes rather than property taxes, because the state exempted the railroad's trucking and shipping competitors from paying them.
The decision lets railroads challenge a broader range of state tax exemptions than a prior ruling had allowed for property taxes, though the Court did not decide whether Alabama's tax scheme actually discriminates against CSX -- that question goes back to the lower courts.
How it got here: A federal trial court dismissed CSX's suit, the Eleventh Circuit affirmed based on its own prior ruling, and CSX asked the Supreme Court to resolve a circuit split.
The Case in Depth
What happened
CSX Transportation, an interstate railroad operating in Alabama, pays the state's 4% sales and use taxes when it buys or uses diesel fuel. Alabama exempts the railroad's main competitors -- interstate trucking and water-shipping companies -- from those same taxes, though truckers pay a separate fuel excise tax instead. CSX argued this unequal treatment violates a federal law protecting railroads from discriminatory state taxation.
The question before the Court
Can a railroad sue a state under a federal anti-discrimination law because the state's fuel sales and use taxes apply to railroads but exempt trucking and shipping competitors?
Why it matters
Railroads across the country gain a clearer path to challenge state sales, use, and other non-property taxes when competitors like trucking and shipping companies get exemptions the railroads don't. States must now be ready to defend such exemptions in court, and the case returns to a trial court to decide whether Alabama's specific tax scheme is actually discriminatory.
What changes now
The case returns to the trial court, which must now decide whether Alabama's tax scheme actually discriminates against CSX -- including whether the state had a sufficient justification for exempting motor and water carriers from the sales and use taxes. The Supreme Court expressly left open questions about the correct comparison class and what counts as adequate justification, leaving those disputes for further proceedings on remand.
What this does not decide
The Court decided only that CSX may bring this type of claim -- it did not decide whether Alabama's tax scheme actually discriminates against railroads, what comparison group should be used to judge discrimination, or what would count as a sufficient justification for an exemption. Those questions go to the trial court on remand.
Concurrences and dissents
Dissent — Justice Thomas
“Instead of simply eliminating the particular vulnerability of railroads by tying their tax fate to that of general commercial and industrial taxpayers, railroads would receive a surprising windfall: most-favored-taxpayer status.”Warning that the majority's reading could give railroads special tax treatment beyond what Congress intended.
Justice Thomas agreed that sales and use taxes count as 'another tax' and that exemptions can be discriminatory in principle, but argued the majority should have adopted a narrower test: a tax exemption scheme violates the statute only if it targets or singles out railroads compared to general commercial and industrial taxpayers, mirroring the structure of the property-tax provisions. Under that test, he would have affirmed dismissal because CSX never alleged it was singled out compared to businesses generally, only compared to its direct transportation competitors.
How the Court got there
The legal reasoning, step by step
- The Court first asked whether Alabama's sales and use taxes counted as 'another tax' under the catch-all provision of the federal railroad tax law, since the statute separately addresses property taxes. It concluded the phrase 'another tax' broadly covers any tax besides property taxes, including sales and use taxes.
- The Court then asked whether a tax can 'discriminate' against railroads simply because the state exempts the railroad's competitors from it. Relying on the ordinary meaning of 'discriminate' -- treating similar parties unequally without good reason -- the Court held that granting an exemption is simply an extreme form of charging a different (here, zero) tax rate, and so exemptions can create discrimination just as differing tax rates can.
- The Court distinguished its earlier decision in a case called ACF Industries, which had barred railroads from challenging property tax exemptions. That earlier ruling rested on the specific structure of the property-tax provisions, which defined the comparison class in a way that excluded exempt property -- reasoning that has no counterpart in the catch-all provision covering non-property taxes like sales and use taxes.
- Because no provision of the statute specifically addresses or permits non-property tax exemptions the way it does for property taxes, the Court found no structural reason to read the catch-all provision as anything other than what it says on its face -- a broad ban on discriminatory taxes, including those built through exemptions.
- The Court rejected Alabama's argument that letting such exemption-based claims proceed would create an illogical inconsistency between property and non-property tax treatment, holding that Congress's chosen statutory line, however imperfect, controls over policy symmetry arguments.
Doctrinal impact
Cases affected by this decision
Distinguishes ACF Industries (510 U.S. 332)
The Court said this earlier ruling barring property-tax exemption challenges does not extend to sales and use tax exemptions.