Swiss Oil Corp. v. Shanks

Background

An oil producer sued Kentucky’s state auditor to get back taxes it paid for oil produced and shipped from the State during 1922–1924. The payments were required under a 1918 Kentucky law that charged one percent of the market value of crude oil when it was first moved from the production site. An earlier 1917 law imposed a similar occupational or license tax. A Kentucky court later held the state constitution also required ordinary property (ad valorem) taxes on oil property, so producers faced both taxes and sought a refund.

Reasoning

The Supreme Court reviewed whether the state tax violated the federal Constitution by denying equal protection, burdening interstate commerce, or violating due process by attaching without notice. The Court accepted the Kentucky court’s view that the tax is an occupational or production/license tax and concluded there was a reasonable basis for treating oil production differently. The Court explained that the Fourteenth Amendment does not demand absolute uniformity of taxation or forbid double taxation, so the production tax did not, on the federal questions presented, make the statute unconstitutional. Because the state court held the earlier law would still apply even if the 1918 amendment were invalid, the taxpayer could not recover a refund.

Real world impact

The ruling lets Kentucky continue collecting the one percent production/license tax on crude oil and allows existing county and local property taxes on oil property to remain. Oil producers who paid both taxes cannot obtain a refund under this record. The decision affirms the state court’s interpretation and leaves state tax classifications in place for the matters decided.