GOLDEN HANDCUFFS // FYI 2026.RSU
STATE PRESET AAPL • $235 Colorado (CO)

Apple RSU Taxes in Colorado (2026)

2026 RSU tax estimate for Apple employees living in Colorado. Compares default brokerage withholding (4.40% state + 22% federal) against actual marginal tax brackets.

Preset Loaded: Apple (AAPL) • Semi-annual vesting (25% per year split into two 12.5% tranches every 6 months)
Brokerage: E*TRADE by Morgan Stanley
Vest & Comp Inputs2026 RATES
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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%

2026 Apple Compensation Benchmarks in Colorado

Below is the 2026 tax withholding and April shortfall breakdown across sample Apple engineering levels for a Single filer in Colorado (at a reference share price of $235/share via E*TRADE by Morgan Stanley):

Apple (AAPL) in Colorado (CO) — 2026 Withholding vs. Actual Tax by Level
Level & Role Base + Annual Vest CO + Fed Withheld True Total Tax Net April Shortfall Extra Shares to Sell
ICT3
Software Engineer (ICT3)
$170,000 base
+$61,100 (260 sh)
 $18,195 $20,273 $2,078 9 shares
ICT4
Senior Software Engineer (ICT4)
$200,000 base
+$122,200 (520 sh)
 $35,133 $47,114 $11,982 51 shares
ICT5
Staff / Principal Engineer (ICT5)
$240,000 base
+$258,500 (1100 sh)
 $74,319 $106,851 $32,533 139 shares

Colorado Supplemental Tax Regulations for Apple RSUs

Colorado levies a flat 4.40% individual income tax rate based on federal taxable income, plus a 0.45% Colorado FAMLI (Family and Medical Leave Insurance) payroll premium up to the Social Security wage cap ($184,500). Because employers withhold state tax at the exact 4.40% flat statutory rate, your state-level RSU withholding closely matches your actual Colorado liability.

Colorado Bracket Architecture: 4.40% flat state income tax rate across all income brackets.

Colorado Safe Harbor & Estimated Tax Vouchers (Colorado Form DR 0104EP (Individual Estimated Income Tax))

Colorado requires quarterly estimated payments on Form DR 0104EP if net Colorado tax liability exceeds withholding by $1,000 or more (safe harbor: 70% of current-year or 100% of prior-year Colorado tax; 110% if federal AGI > $150,000).

Multi-State Relocation & Nonresident Sourcing Rules in Colorado

Colorado allocates nonresident and part-year resident equity compensation based on the percentage of business days worked inside Colorado during the vesting period.

Employer Stock Plan Specifics: Apple (E*TRADE by Morgan Stanley)

Unlike companies that vest monthly or quarterly, Apple’s standard RSU grants vest semi-annually—most commonly on April 15 and October 15. Concentrating a full year of equity compensation into just two vest dates creates two massive liquidity and tax events per year. Furthermore, the April 15 vest lands on the exact same day that both prior-year April tax balances AND Q1 1040-ES estimated taxes are due.

Withholding Election Guidance: Log in to E*TRADE Stock Plan (or Apple’s internal people portal) at least 2–3 weeks before April 15 or October 15 to verify whether supplemental tax withholding rate elections are open for your grant type. In addition, Apple employees participating in the Employee Stock Purchase Plan (ESPP) with a 15% lookback discount should account for disqualifying disposition ordinary income on their W-2.

2026 Statutory Parameters Quick Reference

2026 Federal & Colorado Statutory RSU Tax Parameters (AAPL)
Statutory Parameter 2026 Rate / Rule
Federal Supplemental Withholding Rate 22.00% (≤ $1M) • 37.00% (> $1M)
Colorado Supplemental Withholding 4.40%
Colorado Top Marginal Tax Bracket 4.40%
Colorado Estimated Tax Voucher Colorado Form DR 0104EP (Individual Estimated Income Tax)
2026 Social Security Limit $184,500 (6.2% FICA Cap)
Medicare & Additional Medicare 1.45% Uncapped + 0.9% over $200k/$250k
Apple Stock Plan Brokerage E*TRADE by Morgan Stanley

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