The Michigan Single Business Tax (SBT) was, at the time of this report's release, the only value-added state business tax system in the U.S. The author explores its history, actual practice, and inherent advantages and disadvantages. Tables of data are provided, showing the SBT burden as a percentage of the Adjusted Tax Base on industries in Michigan. This report is a good overview of the SBT and its impact on the state's businesses. 30 pages.