Texas Supplemental Tax Regulations for Apple RSUs
Texas levies zero personal income tax on supplemental wages, RSU vests, or capital gains. Your statutory withholding is restricted exclusively to Federal supplemental (22%/37%) and FICA (Medicare/Social Security).
Texas Safe Harbor & Underpayment Penalties
No state safe-harbor required.
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 Texas's statutory supplemental rate of 0.00% combined with the federal supplemental rate (22% on up to $1M). Because top earners in Texas reach marginal brackets exceeding these rates, you will face an incremental shortfall on April 15.
Localized CPA & Advisory Referral
Advisor Guidance: Pair with an Austin tech CPA to model federal safe-harbor withholding and optimize post-vest equity liquidation.