GOLDEN HANDCUFFS // FYI 2026.RSU
LOCALIZED JURISDICTION AAPL • $235 Colorado (CO)

Apple RSU Tax in Colorado (2026)

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

Preset Loaded: Apple (AAPL) • Biannual or quarterly vesting (April 15 and October 15 typical)
Brokerage: E*TRADE by Morgan Stanley
Vest & Comp Parameters2026.1 PROTOCOL
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Tax Filing Status
IRC § 3402(g) GAPEstimated April Tax Shortfall
$7,216

Your employer's brokerage will automatically sell shares at flat statutory rates (28.65% combined), leaving a $7,216 unpaid tax gap when your W-2 is filed in April.

Incremental Shares to Sell31 SHARES Liquidate manually upon vest to cover estimated federal & state gap
Net Shares Kept After Full Tax254 / 400 Retained value: $59,690
Total Gross Vest$94,000400 shares @ $235/share
Brokerage Sell-to-Cover$26,935115 shares liquidated automatically (28.65%)
True Federal Liability$27,896 Marginal 35.00% bracket on total comp $284,000
State Tax (CO)$4,136 Statutory withheld: $4,136 (4.40%)
2026 FICA Withholding$2,119 SS ($184.5k cap): $0 • Med: $2,119
Actual True Total Tax$34,151 Effective true tax rate: 36.33%
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 Apple 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: E*TRADE by Morgan Stanley

Apple vests typically occur in April and October. Employees receiving six-figure vests through E*TRADE will notice that statutory withholding leaves a 10%–15% federal gap when combined with base salary. Knowing exactly how many shares to sell prevents unexpected liquidation during market dips.

When vesting at Apple, E*TRADE by Morgan Stanley 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 Apple (AAPL)