Between 1901 and 1965, the Department of Treasury played a stabilizing role through sweeping changes, managing state revenue and adapting to the shifting needs of a rapidly growing population. The Michigan State Tax Commission was established in 1905 to ensure fairness in property assessments and bring consistency to local taxation. This marked a new era of tax modernization, as the state’s growing industries—particularly in automobiles—drove economic expansion and public demand for schools, roads, and city services.
When the Great Depression hit in 1929, Michigan’s economy—which had become heavily reliant on manufacturing by then—was deeply shaken. The state tax system depended largely on property taxes, which had increased by 500% between 1914 and 1930. By 1933, Michigan had the highest property tax delinquency rate in the nation. In response, voters approved a constitutional amendment in 1932 limiting property taxes to 1.5% of assessed valuation, further straining state revenues.
Faced with these challenges, the Michigan Legislature sought new revenue sources in 1933, enacting a 3% retail sales tax and forfeiting the state’s share of future property taxes. The end of Prohibition saw the Liquor Control Commission and its Liquor Markup established, and a new tax on the manufacture and sale of beer and wine. Additional taxes on horse race wagering and gasoline—dedicated to supporting road construction and maintenance —helped sustain essential public services during this difficult time when many local governments struggled to stay solvent.
After World War II, Michigan entered a period of intense population growth and urban development. The demand for public services surged, and the state’s financial systems evolved again. This era of reform culminated in adopting Michigan’s 1963 constitution, which reorganized state government, expanded the state’s authority to levy taxes, and laid the groundwork for the creation of a statewide personal income tax. By 1965, the Department of Treasury had become a modern financial institution critical to funding education, infrastructure, and social services, and essential to helping the state navigate both crisis and prosperity.
