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How RSUs are taxed for Colorado residents

Colorado taxes RSU vest income as wages; understand state withholding alongside federal supplemental rates.

Rates and rules change. Content is reviewed for tax year 2026. Check the last-reviewed date and methodology on each page, then confirm against IRS or state guidance before you file.

State sourcing rules may depend on facts and timing

Which state taxes RSU income depends on residency, work location, grant terms, and vest date, not just where you live on December 31. Day-count splits and flat-rate estimates on this site are planning tools only, not legal sourcing determinations.

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In plain terms

Colorado taxes income as wages, in addition to federal and payroll taxes. Colorado applies a flat state income tax to wage income, so estimating the state portion of a is relatively straightforward, but confirm the current rate, since it can change.

How the tax works

Colorado treats value as taxable wage income at the state level.

Colorado uses a flat income tax structure rather than graduated brackets, which simplifies the state estimate.

State on the may still differ slightly from your actual state tax.

If you move in or out of Colorado, equity earned during your Colorado period may still be sourced there.

What to check on your end

  • Colorado state wages on your .
  • The current Colorado flat rate from official sources.
  • State vs: your estimated Colorado tax.
  • timing relative to any move.
  • State guidance or a professional if you relocate.

Common mistake

Assuming a flat state rate means is automatically exact. A flat rate makes the estimate simpler, but the withheld amount is still not guaranteed to match your final state tax.

Example scenario (hypothetical)

Illustration only, not your tax situation.

Example: A Colorado resident vests $20,000 of . Because Colorado uses a flat rate, the state portion is easier to estimate than in a bracketed state, but the resident should still confirm the current rate and compare it to what was withheld.

When a CPA is worth it

  • You moved in or out of Colorado mid-year.
  • You have very large vests.
  • Your state looks off.
  • You want help reconciling state tax.

Sources and notes

Primary tax claims on this page are supported by the official and secondary sources below. Broker and software links describe reporting mechanics — confirm rules against IRS or state guidance.

State residency and equity-income sourcing vary by state; examples cite California FTB guidance.

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For learning, not filing

VestingTax.com is not a CPA firm or tax preparer. Grants, employers, and states all differ. Use the cited IRS and state sources above, your own documents, and a qualified tax professional before you make decisions from this guide.

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