RSU & Stock Vesting Tax Calculators California

California RSU Vesting Tax Calculator

On 100 shares at $50 after $100,000 in prior wages, the model estimates $1,994 withheld and 60 shares retained. It assumes the California input is 10.23%; your payroll treatment may differ.

By StateCalc Team

Updated Nov 4, 2026 Checked Jul 30, 2026 · 1 source

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Shares Vesting

01000000

Stock Price at Vest ($/share)

$0$100,000

California Supplemental Tax Rate (%)

015%

Pre-filled: State DOR (2026 supplemental wage rate)

Year-to-Date Wages (Before This Vest)

$0$10,000,000

Net Value After Tax

$3,006.00

Estimated • Based on your inputs

Total Tax Withheld

$1,994.00

Detailed Breakdown

Gross Vest Value$5,000.00

Effective Withholding Rate39.88%

Federal Withholding (22%/37%)$1,100.00

California Withholding$512.00

Social Security (6.2%)$310.00

Medicare (1.45%)$73.00

Additional Medicare Tax (0.9%)$0.00

Shares Sold to Cover Taxes40

Shares You Keep60

Disclaimer: This calculator provides estimates for informational purposes only. Results should not be considered financial, tax, or legal advice. Consult a qualified professional for your specific situation.

California Quick Facts

13.3% Income Tax Rate

0.70% Property Tax Rate

$100,149 Median Income

140.3 Cost of Living

How This Calculator Works

Calculation methodology and assumptions

California's employer guide lists 10.23% as a flat option for bonuses and stock options paid separately from regular wages; it directs employers to combine supplemental and regular pay when paid together. The guide does not specifically identify RSUs in that table. This calculator uses 10.23% as an editable assumption, not a determination of your employer's treatment.

California EDD employer guide, supplemental wages

Key State Information

For a larger vest of 200 shares at $100 with $190,000 in earlier wages, the model estimates $2,046 in California withholding and $6,826 overall, leaving 131 shares under its whole-share sell-to-cover estimate. It excludes California disability insurance and treats this vest alone as the year's supplemental wages.

Standard financial formulas Pre-filled with documented data Estimates only — not financial advice

Data Source

IRS Publication 525 & Publication 15 (2026); state Department of Revenue

View Original Source | Source record reviewed Jul 30, 2026 | Review target: annually

StateCalc Team

Editorial Team

The StateCalc team builds financial calculators using data from official government sources including the IRS, U.S. Census Bureau, BLS, and state revenue departments. All formulas are validated by an automated test suite and cross-referenced against published data.

Our editorial standards

Frequently Asked Questions

Does California use the same withholding on every equity award?

The EDD table distinguishes bonuses and stock options from other supplemental wages, and payment timing affects the method. Ask payroll how it classifies your award and enter the applicable rate.

Is the amount withheld my final California tax?

No. Withholding is a payment toward your return, and this estimate also omits disability insurance. Compare it with your pay statement and total income.