Davis v. Michigan Department of Treasury
Facts
Michigan exempted from state income taxation all retirement benefits paid by the State or its political subdivisions, while taxing retirement benefits paid by other employers, including the Federal Government, subject only to a limited general exemption. Paul S. Davis, a retired federal employee receiving benefits under the Civil Service Retirement Act, paid Michigan income tax on those federal retirement benefits for tax years 1979 through 1984. He sought refunds, arguing that Michigan's different treatment of state and federal retirement benefits violated 4 U.S.C. § 111 and principles of intergovernmental tax immunity. Michigan denied relief even though retired state employees paid no comparable tax on their state retirement benefits.
Issue
Whether Michigan's income tax scheme, which exempts state and local government retirement benefits but taxes federal civil service retirement benefits, violates 4 U.S.C. § 111 and the doctrine of intergovernmental tax immunity. A threshold question was whether federal retirement benefits count as pay or compensation covered by § 111.
Rule
Federal civil service retirement benefits are deferred compensation for past service as a federal employee and therefore fall within 4 U.S.C. § 111. Under § 111, read in light of the modern doctrine of intergovernmental tax immunity, a State may not impose a heavier tax burden on those who deal with the Federal Government than on those who deal with the State unless the inconsistent treatment is directly related to, and justified by, significant differences between the two classes.
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If Nora challenges the tax under 4 U.S.C. § 111, what is the strongest argument in her favor?