Wyoming Income Tax (2026)

Permitted: No state individual income tax — 0% on wages and all personal income.

PermittedVerified Aug 4, 2026

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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.

Official source: wyoleg.gov →

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

Income Tax in states bordering Wyoming

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

ColoradoInfo
Flat 4.40% — Colorado taxes all individual income at a single flat rate (4.40% for tax year 2025).
Verified Jul 4, 2026 · Source: tax.colorado.gov · Full Colorado rule →
IdahoInfo
Flat 5.3% for 2026 (the first ~$4,800 single / $9,600 married is taxed at 0%).
Verified May 31, 2026 · Source: tax.idaho.gov · Full Idaho rule →
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 →
NebraskaInfo
Graduated individual income tax; for 2026 the top rate is 4.55% (brackets 2.46% / 3.51% / 4.55%), down from 5.20% in 2025.
Verified Jul 15, 2026 · Source: revenue.nebraska.gov · Full Nebraska rule →
South DakotaPermitted
No state individual income tax — 0% on wages and all personal income.
Verified May 31, 2026 · Source: dor.sd.gov · Full South Dakota rule →
UtahInfo
Flat 4.45% (reduced from 4.55% effective tax year 2026).
Verified May 31, 2026 · Source: incometax.utah.gov · Full Utah rule →

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