
RSUs Explained for Startup Employees: Why Vesting, Not Selling, Is the Tax Event
RSUs are taxed as ordinary income on the vesting date, not at sale, and employers withhold a flat 22% on supplemental wages up to $1 million — leaving employees in the 32–37% brackets short by 10 to 15 percentage points each April. This guide covers double-trigger vesting at private startups, why no 83(b) election exists for RSUs, and the $0 cost-basis error on Form 1099-B that makes people pay tax twice on the same income.










