Colorado Income Tax (2026)

Info: Flat 4.40% — Colorado taxes all individual income at a single flat rate (4.40% for tax year 2025).

InfoVerified Jul 4, 2026

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Official source: tax.colorado.gov →

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

Income Tax in states bordering Colorado

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

ArizonaInfo
Flat 2.5% individual income tax on all income levels and filing statuses; Arizona's graduated Optional and X&Y tax tables are now obsolete.
Verified Jul 3, 2026 · Source: azdor.gov · Full Arizona rule →
KansasInfo
Graduated, two brackets, top rate 5.58% (5.20% up to $23,000 single / $46,000 married; 5.58% above).
Verified May 31, 2026 · Source: ksrevenue.gov · Full Kansas 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 →
New MexicoInfo
Graduated, topping out at 5.90% (on income over $210,000); rates 1.5%–5.9%.
Verified May 31, 2026 · Source: tax.newmexico.gov · Full New Mexico rule →
OklahomaInfo
Graduated with a 4.50% top rate for 2026 (cut from 4.75%; consolidated to 3 brackets under HB 2764).
Verified May 31, 2026 · Source: oksenate.gov · Full Oklahoma rule →
UtahInfo
Flat 4.45% (reduced from 4.55% effective tax year 2026).
Verified May 31, 2026 · Source: incometax.utah.gov · Full Utah 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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