GOLDEN HANDCUFFS // FYI 2026.RSU
LOCALIZED JURISDICTION AMZN • $215 Colorado (CO)

Amazon RSU Tax in Colorado (2026)

Localized tax model for Amazon employees residing in Colorado. Evaluates statutory brokerage withholding (4.40% state + 22% federal), true marginal liabilities, and safe-harbor quarterly payments.

Preset Loaded: Amazon (AMZN) • 5% Year 1, 15% Year 2, 40% Year 3, 40% Year 4 (Semi-annual in Y1-2, quarterly in Y3-4)
Brokerage: Morgan Stanley at Work (Shareworks) / Fidelity
Vest & Comp Parameters2026.1 PROTOCOL
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Tax Filing Status
IRC § 3402(g) GAPEstimated April Tax Shortfall
$7,023

Your employer's brokerage will automatically sell shares at flat statutory rates (28.61% combined), leaving a $7,023 unpaid tax gap when your W-2 is filed in April.

Incremental Shares to Sell33 SHARES Liquidate manually upon vest to cover estimated federal & state gap
Net Shares Kept After Full Tax288 / 450 Retained value: $61,920
Total Gross Vest$96,750450 shares @ $215/share
Brokerage Sell-to-Cover$27,681129 shares liquidated automatically (28.61%)
True Federal Liability$28,308 Marginal 35.00% bracket on total comp $281,750
State Tax (CO)$4,257 Statutory withheld: $4,257 (4.40%)
2026 FICA Withholding$2,139 SS ($184.5k cap): $0 • Med: $2,139
Actual True Total Tax$34,704 Effective true tax rate: 35.87%
SPONSORED FIDUCIARY ADVISORYSAFE-HARBOR MATCH
Match with a Fiduciary CPA to calculate quarterly safe-harbor payments

Connect with a Denver/Boulder CPA to ensure Colorado DR 0104EP quarterly estimates prevent underpayment interest. Ensure Form 1040-ES and state vouchers protect you against IRS underpayment penalties (IRC § 6654).

Schedule 15-Min Safe Harbor Review

Colorado Supplemental Tax Regulations for Amazon RSUs

Colorado levies a flat 4.40% income tax rate on all taxable income. Employers withhold at 4.40%, meaning state withholding closely tracks true state liability.

Colorado Safe Harbor & Underpayment Penalties

Pay 100% of prior year or 70% of current year Colorado liability.

Employer Stock Plan Specifics: Morgan Stanley at Work (Shareworks) / Fidelity

Amazon equity packages are heavily backloaded into years 3 and 4 (40% each year). In year 3, your total W-2 income can leap into the 37% marginal bracket, while Morgan Stanley only withholds 22% federally. Without quarterly estimated payments or selling additional shares, Amazonians face a $15,000–$40,000 tax shock in April.

When vesting at Amazon, Morgan Stanley at Work (Shareworks) / Fidelity calculates automatic sell-to-cover withholding using Colorado's statutory supplemental rate of 4.40% combined with the federal supplemental rate (22% on up to $1M). Because top earners in Colorado reach marginal brackets exceeding these rates, you will face an incremental shortfall on April 15.

Localized CPA & Advisory Referral

Advisor Guidance: Connect with a Denver/Boulder CPA to ensure Colorado DR 0104EP quarterly estimates prevent underpayment interest.

Other States for Amazon (AMZN)