Ohio Governor Signs Tax Conformity Bill

Legislation aims to simplify tax filing for businesses and individuals in the state.

Published on Mar. 5, 2026

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Ohio Governor Mike DeWine has signed Senate Bill 9, a tax conformity legislation that aims to simplify the tax filing process for businesses and individuals in the state. The bill was passed to align Ohio's tax code with recent federal tax changes, making it easier for residents to file their taxes.

Why it matters

Tax conformity is an important issue for states as it helps reduce complexity and administrative burdens for taxpayers. By aligning state tax laws with federal changes, Ohio businesses and individuals can more easily navigate the tax filing process, potentially saving time and money.

The details

Senate Bill 9 was passed by the Ohio legislature to conform the state's tax code with recent federal tax law changes. The legislation is intended to streamline the tax filing process for Ohio residents by eliminating the need to make separate calculations and adjustments for state and federal returns.

  • On March 5, 2026, Governor Mike DeWine signed Senate Bill 9 into law.

The players

Mike DeWine

The current Governor of Ohio, having assumed office in 2019.

Senate Bill 9

Legislation passed by the Ohio legislature to align the state's tax code with recent federal tax changes.

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What’s next

The new tax conformity law will go into effect immediately, simplifying the 2026 tax filing season for Ohio businesses and individuals.

The takeaway

By signing this tax conformity bill, Governor DeWine has taken an important step to reduce the administrative burden on Ohio taxpayers and align the state's tax code with federal changes, making the filing process more streamlined and efficient.