Arizona House GOP Calls for Special Session on Tax Conformity

A New Flashpoint Over Federal Tax Changes

A debate over how—and how quickly—Arizona should adjust its tax laws to reflect recent federal changes is shaping up as an early flashpoint ahead of the 2025 legislative session. Several key Arizona House Republican leaders are urging Governor Katie Hobbs to call a special session in January to address what’s known as “tax conformity,” arguing that residents need clarity before filing their state taxes this spring.

Their request comes after Governor Hobbs publicly voiced support for several provisions included in the federal tax package championed by former President Donald Trump and passed by congressional Republicans in July. Those federal changes include eliminating state and federal taxes on tips and overtime income, expanding deductions for seniors, and raising the standard deduction.

A Rare Moment of Agreement—With Disagreement on Timing

In a state where tax policy often divides party lines, both Republican leaders and the Democratic governor now support the broad idea of aligning Arizona’s tax code with the new federal rules. The disagreement is not about whether to conform, but when and how quickly it should happen.

House Speaker Steve Montenegro and other Republican leaders argue that Hobbs’ expressed support for the federal changes demonstrates she is ready to sign a conformity bill. However, they contend that an executive action alone cannot implement the new tax rules at the state level, leaving taxpayers uncertain about what to expect as they head into the new filing season.

“This is about giving Arizonans clarity,” House leaders said in their statement. Their push is aimed at making conformity the first order of business on January 12—the opening day of the new legislative session—if not addressed sooner through a special session.

Why Tax Conformity Matters

“Tax conformity” may sound technical, but it affects millions of people each year. Arizona, like many states, uses portions of the federal tax code as a foundation for state tax calculations. When federal rules change substantially, state lawmakers must pass legislation to bring state law into alignment.

Without conformity, taxpayers and tax preparers often face mismatched definitions, disallowed deductions, and uncertainty about which rules apply. In some years, delays in conformity have pushed filing timelines later into the spring and created confusion for both the public and accountants.

Supporters of fast-tracking conformity argue that adopting the federal changes now could ensure working families, seniors, and small businesses fully benefit from the expanded deductions and income exemptions.

Opponents of rushing the process, however, often caution that Arizona must evaluate potential state revenue impacts before adjusting its tax code.

Hobbs’ Position and the Path Ahead

Governor Hobbs has not yet indicated whether she will call a special session before lawmakers return to the Capitol. Her office has emphasized that while she supports lowering taxes for working families, any changes must be approached responsibly and with attention to the long-term fiscal picture.

Republican leaders, meanwhile, believe waiting until the regular session—without guaranteed early action—could create avoidable complications for taxpayers. They maintain that the state can implement conformity without destabilizing the budget and that residents should not be left wondering which rules apply to their 2024 income.

A Question of Urgency, Not Philosophy

In an environment where tax debates often fall along partisan lines, the shared interest in aligning Arizona’s tax code with federal changes represents a rare area of bipartisan agreement. Yet the urgency with which that alignment should occur remains up for debate.

As the new legislative session approaches, the central question will be whether Arizona moves quickly to adopt the new federal rules—or whether lawmakers take more time to weigh the full implications.

For now, both sides say they support tax relief. The timing is what may ultimately determine how—and when—Arizonans feel its impact.