What's withheld when your NVDA RSUs vest vs. what you actually owe in California, with 2026 federal brackets.
When NVIDIA Corporation RSUs vest, the vest-day value is taxed as wages. Your employer withholds federal tax at a flat 22%, plus Medicare, Social Security and any state tax. Whether that is enough depends on your bracket. For a single filer earning $200,000 in California, a $50,000 vest leaves an estimated −$3,105 gap between what was withheld and what you'll owe. Nvidia's share price has moved sharply over the past few years. Your RSU income is the value on vest day, not on the grant date, so a vest at a higher price means more taxable income and a proportionally larger gap.
| Base salary | $25k vest | $50k vest | $100k vest |
|---|---|---|---|
| $150,000 | −$267 | −$535 | −$3,640 |
| $200,000 | −$837 | −$3,105 | −$8,470 |
| $300,000 | −$3,017 | −$6,035 | −$12,355 |
| $500,000 | −$3,517 | −$7,035 | −$14,070 |
Withheld at vest minus actually owed. Negative means you'll owe more when you file; positive means over-withholding. Single filer, no bonus, standard deduction, vest in the second half of the year, 2026 federal brackets. The gap is the same for every company at the same vest value; only the share count differs (400 NVDA shares ≈ $50,000 at an example price of $125).
At a $200,000 salary, extra RSU income is taxed by California at 9.3%. The higher rates only start at roughly $371,000 of taxable income (2025 thresholds; 2026 thresholds are indexed slightly higher), and the 13.3% headline rate includes a 1% surcharge that applies only above $1 million.
California requires employers to withhold 10.23% on stock compensation. That is more than the 9.3% most tech salaries actually owe, so the state side is usually slightly over-withheld. On a $50,000 vest at a $200,000 salary: California withheld $5,115, California owed $4,650 (+$465). The shortfall comes from the federal side: 22% withheld ($11,000) versus $14,570 owed (−$3,570).
California SDI (1.3% in 2026, no wage cap) is also withheld from RSU income: $650 on a $50,000 vest. It is withheld correctly, so it doesn't add to the gap, but it does reduce what you keep.
California taxes RSU income based on where you worked between grant and vest. If you move out of California before a grant finishes vesting, California can still tax the share of each vest that relates to your California workdays.