California: 13.3% Top Marginal State Income Tax Rate
California has the highest state income tax rate in the United States. The top marginal rate of 13.3%, comprising a 12.3% base rate plus a 1% Mental Health Services Tax (MHST) on taxable income over $1 million, is a significant factor in total compensation analysis for tech workers in San Francisco, San Jose, and Los Angeles.
Approximate California state income tax at $150,000 gross salary (illustrative; actual depends on deductions, filing status, and exact income breakdown). California's graduated rate means the effective rate at $150k is roughly 8.5–9%.
California uses a graduated (marginal) income tax rate structure with 10 brackets. The 13.3% rate applies only to taxable income above $1 million for single filers. For income in the $100k to $500k range, where many tech workers land, the marginal rates run from 9.3% to 12.3%. At $150,000 in taxable income, the California effective state income tax rate is approximately 8 to 9%, resulting in roughly $12,000 to $13,500 in state income taxes. At $300,000, the effective rate rises toward 10 to 11%.
California also applies state income tax to RSU income at vesting, taxed as ordinary income at California's graduated rates. For a tech engineer vesting $100,000 in RSUs in a given year, the California state tax on that event alone can exceed $10,000 to $12,000. This is a primary financial motivation cited by high-equity tech workers who relocate from California to Washington or Texas.
California has historically proposed and intermittently considered a wealth tax and an exit tax on departing residents. Neither has passed as of 2026, but the legislative environment remains actively hostile to high earners. For long-term total compensation planning, California's tax trajectory is an additional risk factor worth considering.
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Total Comp CalculatorFrequently asked questions: California income tax
What is California's state income tax rate in 2026?
California's top marginal state income tax rate is 13.3% in 2026. This comprises a 12.3% base rate plus a 1% Mental Health Services Tax on taxable income over $1 million. For most tech workers earning $100k to $500k, the marginal rate ranges from 9.3% to 12.3%, with an effective rate (average across all income) typically in the 8 to 11% range depending on income level and deductions.
Does California tax RSU income?
Yes. California taxes RSU income at vesting as ordinary income, subject to California's graduated income tax rates. California also has "source income" rules: if you earned RSUs while working in California but later moved to another state, California may still claim a portion of the RSU income proportional to the time you worked in California during the vesting period.
How does California's income tax compare to other states?
California's 13.3% top marginal rate is the highest of any US state. Hawaii (11%), New Jersey (10.75%), and Oregon (9.9%) are the next highest. At the other end, nine states, including Texas, Florida, and Washington, have no state income tax at all.
Is a $200k salary in San Francisco worth less than $200k in Seattle?
Yes, in after-state-tax terms and in cost-of-living-adjusted terms. A California resident at $200k pays roughly $18,000 to $22,000 in state income taxes. A Washington state resident at the same salary pays $0. San Francisco's cost of living is also roughly 30% higher than Seattle's. Use the Compare Job Offers tool to model your specific numbers.
Tax rates shown reflect the best available 2026 information and are provided for informational purposes only. State income tax rates, brackets, and rules change frequently. This page is not tax advice. Consult a qualified tax professional for advice specific to your situation. © CompCalc — compensationcalculator.xyz