The study, released Thursday, is by the Iowa Fiscal Partnership. It found that state and local taxes amount to about 10.4 percent of the Iowans' income. The national rate is 10.9 percent.
Most states in the Midwest had higher taxes than Iowa, except Missouri and South Dakota.
According to the report, if Iowa taxed at the same rate as the national average there would be an additional $532 million available to spend. The study covers the 2008 budget year, the latest for which figures are available.