Idaho Income Tax (2026)

Info: Flat 5.3% for 2026 (the first ~$4,800 single / $9,600 married is taxed at 0%).

InfoVerified May 31, 2026

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Official source: tax.idaho.gov →

General legal information, not legal advice — verify important decisions with a licensed attorney.

Income Tax in states bordering Idaho

The same rule in each neighboring state LawLert has verified, from that state’s own official source.

MontanaInfo
Graduated, topping out at 5.65% in 2026 (down from 5.9%); the lower 4.7% rate applies up to $47,500 single / $95,000 joint. No state sales tax.
Verified May 31, 2026 · Source: revenue.mt.gov · Full Montana rule →
NevadaPermitted
No state income tax — "The State of Nevada does not impose an individual or corporate income tax" (Nevada Department of Taxation). Nevada does not tax wages, salaries, or other personal income.
Verified Jul 3, 2026 · Source: tax.nv.gov · Full Nevada rule →
OregonConditional
Graduated with a high 9.90% top rate for 2026 (brackets from 4.75% to 9.90%). No state sales tax.
Verified May 31, 2026 · Source: oregon.gov · Full Oregon rule →
UtahInfo
Flat 4.45% (reduced from 4.55% effective tax year 2026).
Verified May 31, 2026 · Source: incometax.utah.gov · Full Utah rule →
WashingtonPermitted
No tax on wage/salary income. Note: a 7% state tax applies to long-term capital gains above ~$270,000 (2026); wages themselves remain untaxed.
Verified May 31, 2026 · Source: dor.wa.gov · Full Washington rule →
WyomingPermitted
No state individual income tax — 0% on wages and all personal income. No statute imposes one; Wyo. Const. art. 15, § 18 requires full credit for sales, use, and ad valorem taxes against any income tax, which has effectively kept Wyoming income-tax-free.
Verified Aug 4, 2026 · Source: wyoleg.gov · Full Wyoming rule →

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