gavel and money
Arizona Taxpayers Score A Win As New Law Reforming Income Tax Rate Is Upheld

April 21, 2022

By Terri Jo Neff |

In a major victory for millions of Arizonans, the Arizona Free Enterprise Club has prevailed at the Arizona Supreme Court in its attempt to protect a forecasted $1.9 billion tax cut through changes signed into law last year to change Arizona from a four rate income tax structure to a single rate.  

On Thursday, the justices ruled in favor of a lawsuit filed the AFEC and several of its members who sought to ensure two provisions of Senate Bill 1828 related to the new 2.5 percent flat rate income structure goes into effect in January 2025. SB1828 was the omnibus appropriations bill signed into law by Gov. Doug Ducey in June 2021. 

The AFEC lawsuit was in response to an effort by the Arizona Education Association sponsored Invest In Arizona to have voters overturn those two provisions in November.

But key to the AFEC’s legal arguments is the Arizona Constitution, which prohibits voter referendums of legislative actions undertaken for “the support and maintenance of the departments of state government and state institutions.” Oral arguments were held at the Arizona Supreme Court on Tuesday, during which attorneys Kory Langhofer and Thomas Basile presented AFEC’s position.

On Thursday morning, Mussi took part in an interview with KFYI’s James T. Harris about the efforts to protect the forthcoming tax cuts due to changing to a 2.5 percent flat rate. Mussi told Harris that Tuesday’s arguments at the Arizona Supreme Court  “went well” and that he was optimistic “the justices generally understood what our argument was.”

Mussi did not realize how prescient his observation was, as just a few hours later the justices released their decision siding with AFEC and rejecting the referendum attempt.

The decision under the signature of Chief Justice Robert Brutinel enjoined the Invest In Arizona referendum effort from appearing on the 2022 General Election Ballot. In addition, the decision denied Invest In Arizona’s request for attorneys’ fees.

After the Court’s decision was announced, Mussi called it “a big win for taxpayers” across the state.

“The legislature passed historic tax cuts last year that benefit all Arizona taxpayers,” he added. “It’s time for Invest in Arizona and out-of-state special interest groups to accept this reality and stop making a farce of the referendum process.”

A detailed opinion explaining the legal conclusions made by the justices to form Thursday’s decision will be released in the next few weeks.

Hear Scot Mussi, President of the Arizona Free Enterprise Club, discuss the flat tax argument at the Arizona Supreme Court

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