Union Tank Line Co. v. Wright

1919-03-24

Headline: State tax on moving tank cars struck down as arbitrary; Court blocks Georgia’s mileage-based valuation when it produces grossly excessive assessments, protecting interstate commerce and property owners from unfair taxation.

Holding: The Court ruled that Georgia’s assessment—assigning a share of the company’s nationwide car value based only on track mileage—was arbitrary and unconstitutional because it produced a grossly excessive tax burden on interstate property, violating due process and commerce protections.

Real World Impact:

Limits states from using mileage ratios that produce grossly inflated tax bills.
Protects interstate equipment owners from arbitrary state property taxation.
Requires fair or reasonably approximate valuations for movable property used across states.

Topics: taxes on rail cars, interstate commerce, state taxation rules, property valuation

Summary

Background

A New Jersey company that owned thousands of tank cars and leased them to shippers reported that it had an average of 57 cars in Georgia in 1913, valued at $830 each, and returned $47,310 in Georgia property value. The Georgia comptroller instead used the company’s reported total nationwide value and the ratio of Georgia track miles to total track miles to assign Georgia $291,196 in taxable value and also allocated a franchise value. The company challenged the assessment as unconstitutional, and state courts disagreed about the proper method.

Reasoning

The main question was whether Georgia could tax part of this interstate equipment by simply taking a percentage of the company’s entire value based on track mileage. The Supreme Court said states may tax movable equipment habitually used in the state, and approximate methods can be acceptable when fair. But here the comptroller made no effort to find the real Georgia property and used a mileage ratio that produced a valuation far above the actual cars present. The Court concluded that this method was arbitrary, gave results wholly unreasonable, and therefore violated constitutional protections against unfair deprivation of property and imposed an undue burden on interstate commerce.

Real world impact

The ruling prevents states from enforcing grossly inflated mileage-proportion assessments when those assessments have no real relation to property actually used in the State. Equipment owners used in many States must be taxed on fair valuations, not on arbitrary formulas that produce excessive results. The decision leaves open that reasonable, approximately accurate methods can be used in other cases.

Dissents or concurrances

Three Justices dissented, arguing longstanding decisions upheld mileage apportionment as a practical, equitable method and that Georgia’s law was a permissible way to approximate taxable value.