Gaming sites have officially been legal in the Wolverine State since December 2019. When will Michigan Online Casinos Launch? She signed HB 4311 into law on December 20, 2019. However, proponents won Whitmer over by imposing between a 20% and 28% tax rate on operators. She expressed concerns that internet gambling could cannibalize online lottery sales, which provide almost $1 billion annually to Michigan’s public school fund. Gretchen Whitner was initially reluctant to sign. This legislation sailed through both the State House and Senate. HB 4311 deems internet casinos, online poker, and daily fantasy sports legal. Online casinos are legal in the Wolverine State thanks to the Lawful Internet Gaming Act.