Idaho State Tax Calculator 2026
Estimate your Idaho state income tax and take-home pay for tax year 2026.
Last updated: November 2025 · Source
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Idaho 2026 tax overview
Flat 5.3% effective TY2025 under HB40; conforms to federal std deduction.
Breakdown
Frequently Asked Questions
What are the 2026 Idaho income tax rates?
Idaho has a flat 5.30% rate on taxable income. Flat 5.3% effective TY2025 under HB40; conforms to federal std deduction.
What is the 2026 Idaho standard deduction?
Idaho conforms to the federal standard deduction ($16,100 single, $32,200 MFJ for 2026 per Rev. Proc. 2025-32).
Does Idaho tax Social Security benefits?
Tax treatment of Social Security varies by state. Idaho's rules can change year-to-year, check the Idaho Department of Revenue for the most current guidance.
What is the difference between federal and Idaho state income tax?
Federal tax is collected by the IRS at uniform rates nationwide (10%-37%). Idaho state tax is separate, with its own brackets and rules. Total income tax burden = federal + state combined.