Lehnhausen v. Lake Shore Auto Parts Co.

Background

In 1970 Illinois voters approved a constitutional amendment (Article IX-A), effective January 1, 1971, that prohibited valuation-based personal property taxation for individuals but left corporate and other non-individual personal property taxes intact. A corporation that paid the tax sued on behalf of corporations, saying the scheme violated the Fourteenth Amendment’s guarantee of equal protection because individuals were exempt while corporations were not. Lower federal and state courts disagreed about the amendment’s scope and constitutionality, and the Illinois Supreme Court concluded the tax scheme violated equal protection before the case reached this Court.

Reasoning

The central question was whether exempting natural persons from valuation-based personal property taxes while keeping such taxes for corporations was an unfair, invidious discrimination. The Court reviewed prior decisions and emphasized that states have wide latitude to classify taxpayers for revenue and administrative reasons. Illinois argued the individual tax was hard to administer, unevenly applied, and that the amendment was a staged approach to eliminating the tax for individuals. The Court found these practical and fiscal concerns were a conceivable and legitimate basis for the classification and concluded the difference in treatment was not constitutionally invidious.

Real world impact

The decision allows Illinois to carry out Article IX-A and leaves corporations and similar entities subject to ad valorem personal property taxation while individuals are exempt. It reinforces that states have substantial discretion in designing tax systems and classifications, especially where administrative and fiscal concerns are asserted.

Dissents or concurrances

The opinion notes that one justice dissented on the Illinois Supreme Court, but the U.S. Supreme Court reversed that judgment and provided the governing constitutional ruling.