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State Tax Changes Taking Effect January 1, 2025

25 min readBy: Joseph Johns, Abir Mandal, Jared Walczak, Jacob Macumber-Rosin

Thirty-nine states will begin 2025 with notable tax changes, including nine states cutting individual income taxes (two of them implementing flat taxes), three states cutting corporate income taxes, and two states adopting new first-year expensing provisions. Generally, state tax changes take effect either at the start of the calendar year (January 1) or the fiscal year (July 1 for most states), with rate changes for major taxes typically implemented effective January 1—either prospectively, as in these cases, or retroactively, as may happen under legislation enacted in the new year.

Recent years have seen a wave of significant tax reforms, and the changes scheduled for 2025 show that these efforts have not let up. The evidence of the past four years indicates that many states understand and value the importance of creating and maintaining a stable, pro-growth, and competitive tax code.

Summary of State Tax Changes

2025 Tax Changes by State

Notable State Tax Changes Implemented Earlier in 2024

Several states adopted notable tax changes in 2024 that were retroactive to January 1, 2024, or otherwise made effective sometime during 2024, and which were adopted after, or otherwise not captured in our July 1 tax changes update.

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About the Authors

Joseph Johns Tax Foundation

Joseph Johns

Tax Policy Analyst

Joseph Johns is a Tax Policy Analyst with the Tax Foundation. He graduated from George Mason University in 2021 as an MA Fellow at the Mercatus Center, where he assisted Mercatus scholars with state-level economic research.

Abir Mandal Tax Foundation
Expert

Abir Mandal

Senior Policy Analyst

Abir Mandal is a Senior Policy Analyst at the Tax Foundation, focused on state tax policy. Dr. Mandal holds a PhD in economics from Clemson University, where he focused on economic growth and development, trade, and econometrics.

Jared Walczak Tax Foundation
Expert

Jared Walczak

Senior Fellow

Jared Walczak is a Senior Fellow at the Tax Foundation, where he spent five years as Vice President of State Projects, and president of Walczak Policy Consulting.

Jacob Macumber-Rosin Tax Foundation
Expert

Jacob Macumber-Rosin

Excise Tax Policy Analyst

Jacob Macumber-Rosin is an Excise Tax Policy Analyst with the Tax Foundation. Jacob holds a BS in economics (politics and the economy) as well as a BS in civic and economic thought and leadership from Arizona State University.

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