Debunking the Myth that Tax Policy Causes Out-Migration

On November 3, 2020, voters will have the chance to ratify an amendment to the Illinois Constitution which would allow the state to use a graduated rate structure for its income tax. Ratification of this amendment would  permit implementation of Public Act 101-0008 (“P.A. 101-0008”) which was signed into law on June 5, 2019. If implemented, this legislation which is frequently referred to as the “Fair Tax” by proponents, would replace the state’s current flat rate income tax with a graduated rate structure that: is tied to ability to pay; in normal economic times would raise around $3.5 billion in new revenue annually; and would effectively help eliminate some of the long-term structural flaws that have consistently made Illinois’ overall tax system one of the most unfair and poorly performing in the nation.

Many of those opposed to the Fair Tax have tried to mislead Illinoisans into voting against ratifying the proposed amendment to the state’s constitution this November, by relying on arguments that have emotional appeal but are not supported by either evidence or the vast body of research. One such specious argument consistently made against the proposed Fair Tax is that the change to a graduated rate income tax structure will cause a mass exodus of middle-income households and millionaires from Illinois.

This claim, however, is exposed for the baseless canard it is when evaluated against the body of research covering the relationship—or as it turns out lack thereof—between tax policy and migration, as well as the relevant data from the Internal Revenue Service (“IRS”), U.S. Census Bureau, and the Illinois Department of Revenue (“IDOR”).  People (including millionaires) move for many complicated, interrelated reasons, least of which is because of tax policy.