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Bill

H 559

TAXATION – Amends existing law to update references to the current Internal Revenue Code and to revise certain tax credits and adjustments.

68th Legislature, 2nd Regular Session (2026)

Idaho H 559 updates state tax code references to current federal Internal Revenue Code and revises tax credits, passing the House 59-9.

Reported Signed by Governor on February 10, 2026 Session Law Chapter 1 Effective: Retroactive to 01/01/2025
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Bill Summary · H 559

Legislative bill overview

H 559 updates Idaho's tax code to align with the current federal Internal Revenue Code and modifies certain state tax credits and adjustments. The bill passed the House with strong bipartisan support (59-9) and is now headed to the Senate for consideration.

Why is this important

Tax code alignment ensures Idaho's tax system operates smoothly with federal tax changes and prevents conflicts or inefficiencies when taxpayers file state returns. Updates to credits and adjustments can affect tax liability for individuals and businesses, potentially influencing state revenue and taxpayer compliance costs.

Potential points of contention

  • Limited public detail available: The bill's specific amendments to tax credits and adjustments are not detailed in this summary, making it difficult to assess which taxpayers benefit or lose
  • Revenue impact unclear: Without knowing which credits are revised, the fiscal effect on the state budget and individual taxpayers is unknown
  • Possible distributional effects: Changes to tax credits may disproportionately affect certain income groups or business sectors, though this cannot be determined from available information

Compiled from official sources — confirm details with the bill’s official record.

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