Utah
Oklahoma
Michigan
MissouriRSU $15,000
$9,892.50
State $660 · Total withheld $5,107.50
All states
2026Rank #29
2026Rank #29Colorado RSU Tax 2026
~4.4% PIT — $2,200 state withholding, $33,936 net on $50,000 RSU vest (100 shares × $500 FMV) with $150,000 other annual income (flat supplemental method).
By Sammy S. · Founder · AuthorUpdated for 2026
~4.4% PIT
Rate
$2,200
State tax
$16,064
Total withheld
#29
National rank
Colorado RSU withholding at a glance
Supplemental rate
~4.4% PIT
State tax (vignette)
$2,200
Total withheld
$16,064
Net RSU
$33,936
No separate supplemental table; educational estimate uses the state’s flat PIT ≈4.4%. Rank #29 on $50,000 RSU vest (100 shares × $500 FMV) with $150,000 other annual income (flat supplemental method). Federal $11,000 + FICA $2,864 on this vignette.
Key takeaways — Colorado RSU tax
- Colorado ranks #29 at ~4.4% PIT (~$2,200 state tax on $50,000 RSU vest (100 shares × $500 FMV) with $150,000 other annual income (flat supplemental method)).
- Total vignette withholding ~$16,064 (federal $11,000 + FICA $2,864 + state $2,200); net ~$33,936.
- No separate supplemental table; educational estimate uses the state’s flat PIT ≈4.4%.
- Federal flat supplemental remains 22% regardless of state (IRS Pub. 15).
- Model custom amounts at /rsu-tax-calculator.
Colorado vs similar supplemental rates
States with supplemental rates closest to Colorado (~4.4% PIT). Colorado: $2,200 state tax on the vignette.
Modeled Colorado RSU stub ($50,000 RSU vest (100 shares × $500 FMV) with $150,000 other annual income (flat supplemental method))
Line amounts are calculated from our engine — the same engine as the RSU tax calculator. Not a substitute for your employer’s stub.
| Line | Amount | Note |
|---|---|---|
| Federal income tax (supplemental) | $11,000 | 22% flat (Pub. 15) on this vignette |
| FICA (SS + Medicare) | $2,864 | 6.2% SS + 1.45% Medicare (Additional Medicare if over $200k YTD) |
| CO state tax | $2,200 | ~4.4% PIT |
| Net RSU | $33,936 | After $16,064 total withheld |
Colorado withholding at different RSU sizes
Same $150,000 other annual income; flat supplemental method. State rate ~4.4% PIT.
RSU $50,000
$33,936
State $2,200 · Total withheld $16,064
RSU $100,000
$69,561
State $4,400 · Total withheld $30,439
RSU $250,000
$176,436
State $11,000 · Total withheld $73,564
How to read this page
Colorado RSU / supplemental withholding in 2026
No separate supplemental table; educational estimate uses the state’s flat PIT ≈4.4%.
On $50,000 with $150,000 other annual income, modeled state withholding is $2,200 and after-tax share value is about $33,936.
Compared with New York ($5,850 state) and Texas ($0 state) on the same vignette, Colorado sits at rank #29.
Colorado: flat PIT used as supplemental estimate
Colorado has a flat personal income tax and no separate supplemental percentage in our source set.
When an RSU vest is paid separately, many payroll systems withhold near the flat PIT of 4.4%. That is the educational estimate shown here.
County or local add-ons (where any) are not included.
How Colorado payroll usually handles RSU vests
When the RSU vest is paid separately, many employers apply ~4.4% PIT state rules plus federal 22% and FICA.
If the RSU vest is combined with regular wages, withholding may follow the aggregate method instead of these flat percentages (IRS Pub. 15 §7).
Employees should reconcile annual liability on Form 1040 — paycheck withholding is only an estimate.
How withholding scales with RSU size
At a constant rate, state tax scales roughly linearly: double the RSU vest and state withholding roughly doubles (before exemptions or method changes).
Above $1M supplemental wages in a year with one employer, federal withholding jumps to 37% on the excess (Pub. 15).
What this profile does not include
Local city or municipal wage taxes (for example NYC resident tax, Philadelphia wage tax, Ohio city income tax) are not in these figures.
California SDI, state disability, paid family leave premiums, and local school taxes are outside the supplemental income-tax line.
Confirm current employer guides linked in the sources section before relying on a stub estimate.
Who this Colorado RSU page helps
Useful if…
- •Colorado employees reading an RSU vest stub
- •Candidates comparing Colorado offers to other states
- •Payroll teams verifying CO supplemental setup
Use official tools if…
- •City or local wage taxes not listed here
- •Signing RSU vests paid with the first regular paycheck (aggregate method)
- •Year-end true-up if under-withheld at 22% federal
Colorado RSU withholding checklist
Quick steps before relying on this vignette for payroll decisions.
- 1Confirm Colorado’s current supplemental rule with the state tax agency.
- 2Ask payroll which withholding method they use for RSU vests.
- 3Check federal, FICA, and state lines separately on the stub.
- 4Run scenarios at /rsu-tax-calculator.
- 5Plan estimated payments if your marginal bracket exceeds 22%.
Colorado RSU withholding ladder
| RSU | State tax | Total withheld | Net |
|---|---|---|---|
| $15,000 | $660 | $5,107.50 | $9,892.50 |
| $50,000 | $2,200 | $16,064 | $33,936 |
| $100,000 | $4,400 | $30,439 | $69,561 |
| $250,000 | $11,000 | $73,564 | $176,436 |
Compare Colorado with another state
Compare any two states
Supplemental RSU withholding on a $50,000 vest (100×$500) with $150,000 other income.
Related states
Colorado RSU tax FAQs
Colorado uses about 4.4% for flat supplemental withholding in our model (~$2,200 on $50,000 RSU vest (100 shares × $500 FMV) with $150,000 other annual income (flat supplemental method)).
On the vignette ($50,000 vest, $150,000 other income): about $16,064 total withheld ($11,000 federal + $2,864 FICA + $2,200 state), leaving ~$33,936 after-tax share value (~67.87 net shares after sell-to-cover).
Supplemental flat rates are a payroll shortcut when RSU income is withheld separately. Employers may instead use the aggregate method (combine with regular wages). Confirm with payroll and your state withholding tables.
Usually no under the flat supplemental method — both are supplemental wages. Timing and whether pay is combined with regular wages can change the stub via the aggregate method.
State income tax withheld may be itemized on Schedule A subject to the federal SALT cap. Whether you benefit depends on your full return.
About $11,000 (22% flat), the same as in every other state on this vignette — plus about $2,864 FICA.
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