Financial planning in California
The highest state income tax in the country, and it treats capital gains as ordinary income.
Direct answer
California's income tax runs from 1% to 12.3%, with a further 1% on taxable income over $1 million, and it taxes capital gains at the same rates as wages. Social Security is excluded, but pensions and IRA and 401(k) withdrawals are taxed in full, and residents are taxed on all income wherever it is earned. There is no state estate tax and no state deduction for 529 contributions. For a Bay Area household holding equity, the year in which something vests, is exercised or is sold matters more here than anywhere else in the country.
California tax treatment
Figures are for tax year 2025, each read from the source beside it. Thresholds and rates are revised regularly; confirm the current year before acting on any of them. What these rules change in a household’s plan, from the order accounts are drawn to the timing of Roth conversions, is set out in the retirement tax planning overview.
Rates step up through the brackets to 12.3%, and the Behavioral Health Services Tax adds 1% on taxable income over $1,000,000. Capital gains receive no preferential rate; they are taxed as ordinary income.
California excludes Social Security and Tier 1 Railroad Retirement benefits, but pension, annuity, IRA and 401(k) income is taxed the same way it is federally. A California resident is taxed on all income regardless of where it comes from.
No California estate tax return is required for deaths after December 31, 2004, when the federal credit it was tied to was eliminated. Only the federal exclusion applies.
Worth doing here
Things that are worth doing in California that would not be worth doing, or would work differently, somewhere else.
With a marginal rate of 12.3% to 13.3% and no capital gains preference, moving a vest, exercise or sale from one tax year to another changes the state tax bill more than any other single decision. Concentrated-position plans here are built around the calendar.
Anyone who spends more than nine months of a year in California is presumed to be a resident, and residents are taxed on all their income. For households splitting time between states, or planning a move, the day count and the paper trail decide the outcome.
California gives no state income tax deduction for 529 contributions, to its own ScholarShare plan or to any other state's. Earnings still grow and come out tax-free for qualified education costs, so the choice of plan should be about cost and investments rather than a state break.
Federal and state, together
California income tax alone exceeds the federal deduction for state and local taxes for a great many households, and above $500,000 of modified adjusted gross income the cap shrinks toward $10,000. Most of what a high-earning Californian pays the state is not deductible federally, which makes the state layer the one to manage.
The federal deduction for state and local taxes is $40,400 for tax year 2026 and begins to shrink above $500,000 of modified adjusted gross income, down to a floor of $10,000, and is scheduled to return to $10,000 after 2029. The federal estate tax exclusion is $15,000,000 per person for deaths in 2026. IRS, Instructions for Schedule A (2025), line 5e; IRS, tax year 2026 inflation adjustments (Rev. Proc. 2025-32).
Cities
Each city page covers what is local — how households there tend to be paid, what the first meeting usually covers — and inherits this state layer.
San Francisco's households are paid in equity to a degree found almost nowhere else: restricted stock at the large public technology and financial companies headquartered here, and options, restricted units and tender-offer liquidity at the private ones.
The South Bay is home to many of the largest publicly traded semiconductor, networking and software companies in the world, headquartered in San Jose and the surrounding cities of Santa Clara County.
Los Angeles pays its households through entertainment and media, aerospace and defense along the South Bay, large health systems and universities, the ports and the professional firms that serve all of them.
San Diego's economy runs on Qualcomm and the wireless and semiconductor firms around it, a dense biotechnology and life-sciences cluster in La Jolla and Torrey Pines, the University of California San Diego and its health system, and one of the largest military presences in the country, with the defense contractors that follow it.
Watch and learn
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Common questions
No. Social Security and Tier 1 Railroad Retirement benefits are excluded from California income.
No. Capital gains are taxed as ordinary income at the same graduated rates as wages, up to 12.3%, plus 1% on taxable income over $1 million.
No. No California estate tax return has been required for deaths after December 31, 2004.
No. Flames Financial Planning is based in Minnetonka, Minnesota, and serves California households through a virtual planning relationship. This page describes the service area and does not claim a California office.
Yes. State tax treatment shapes withdrawal order, Roth-conversion timing, and where investments are best held. Planning includes tax guidance and review of a completed return; Premier adds tax projections and preparation and filing through an independent tax partner.
Next step
A discovery meeting covers your situation, what you pay now, and whether a fixed quarterly membership is a better fit.
