California distinguishes between domicile and residency, and the two can point in different directions. Domicile is your true permanent home, the place you intend to return to. Residency is a question of whether you're here for other than a temporary or transitory purpose. You can be domiciled elsewhere and still be taxed as a California resident.

The factors the FTB weighs were largely set out in the Bragg decision and expanded since: the location of your principal residence, where your spouse and children live, where your children attend school, the state issuing your driver's license and vehicle registrations, where your professional licenses are held, where your bank and brokerage accounts are maintained, the location of your doctors and other professionals, the origination point of your financial transactions, and the number of days spent in California versus elsewhere.

The safe harbor

There is a safe harbor for people working outside California under an employment-related contract for an uninterrupted period of at least 546 consecutive days. It comes with limits on California-source intangible income and on the number of days you can return. Most people who cite it do not qualify for it.

If a notice arrives

Residency examinations typically open with a request for information covering several years of facts. The documentation that makes a position defensible is the documentation created at the time, not reconstructed afterward, which is the main argument for having the conversation before the move rather than after.

The mechanism is an allocation ratio. For restricted stock units, California looks at the workdays you spent in California between the grant date and the vest date, divided by total workdays in that period. That fraction of the vesting income is California-source, regardless of where you live when it vests.

Stock options follow similar logic, though the measurement period differs depending on whether the option is statutory or nonstatutory, and whether the relevant period runs from grant to exercise or grant to vest. Incentive stock options add a further wrinkle, because California's treatment of the AMT adjustment doesn't track the federal treatment.

Where it goes wrong

Two failure modes are common. The first is a payroll department that stops California withholding the moment your address changes, leaving a balance due nobody sees until the return. The second is an out-of-state preparer who reports only the new state's income, because nothing in the W-2 flags the California portion.

What can still be planned

Where there is discretion, there is planning: which year to exercise, whether to sell at vest or hold, how to sequence multiple grants, and how the California piece interacts with the federal AMT. The allocation itself is a question of fact, but the timing around it usually isn't.

Cost segregation reclassifies components of a building into shorter recovery periods, which federally can be paired with bonus depreciation to accelerate a large deduction into the year of purchase. California does not conform to bonus depreciation at all, and its Section 179 expensing limit sits far below the federal one, so the same study produces a materially smaller state deduction.

The consequence is two depreciation schedules for one property, maintained in parallel for as long as you own it. The federal basis declines faster. The California basis declines more slowly. At sale, those two bases produce two different gains, and the California depreciation recapture is calculated off its own schedule.

Short-term rentals

The material participation analysis that lets short-term rental losses offset other income is a federal question, but the loss it produces is a California loss too, computed on California's depreciation numbers. The federal and state results can diverge substantially in the first year.

Before you commission a study

The useful analysis runs both numbers. Sometimes the combined benefit still clears the cost of the study comfortably. Sometimes it changes which year the property should be placed in service, and sometimes it changes whether the study is worth doing.

When you exchange California property for property outside the state, California defers its share of the gain rather than forgiving it. When the replacement property is eventually sold in a taxable transaction, the previously deferred California gain becomes taxable to California, even though the property sold sits in another state and you may no longer live here.

The annual filing

Form FTB 3840 is filed for the year of the exchange and then annually for as long as the deferral continues. It's an information return, not a payment, and it is the mechanism California uses to track the deferred gain. Missing it is common, particularly when an out-of-state preparer takes over the return, and California can assess based on its own estimate if the filings stop.

Where planning helps

Knowing the clawback figure before the exchange changes what the deferral is actually worth. That number sometimes points toward a different replacement property, a different holding period, or a different exit structure entirely. It is also worth coordinating with the qualified intermediary and closing attorney, since the reporting obligation tends to fall between the parties who each assume someone else is handling it.

The election lets a partnership or S corporation pay California tax at the entity level at a flat 9.3% of qualified net income, with each consenting owner claiming a credit for their share. The point is federal: the entity deducts the payment, which moves state tax out from under the owner's SALT limitation. California adds the deduction back in computing state net income.

What changed for 2026

Senate Bill 132, signed in June 2025, extended the election for taxable years beginning on or after January 1, 2026 and before January 1, 2031. It also softened the prepayment rule. Previously, an entity that missed or underpaid the June 15 payment lost the election for the entire year. For 2026 through 2030, the election survives, but each qualified taxpayer reduces their credit by 12.5% of their pro rata share of the unpaid amount.

That relief is worth understanding without relying on it. The first payment is the greater of $1,000 or 50% of the prior year's elective tax, due June 15 of the election year, with the balance due by the original return deadline without extensions. The election itself must still be made on a timely filed original return, never an amended one, and once made it is irrevocable for the year and binding on every owner, consenting or not.

Who can participate

The entity must be taxed as a partnership or S corporation, and cannot be publicly traded or part of a combined reporting group. Owners who can claim the credit are individuals, fiduciaries, estates, trusts, and single member LLCs disregarded and owned by one of those. Corporate and partnership owners cannot, which means a fund or a corporate partner in the structure changes the analysis for everyone.

Where it gets decided wrong

Two places. The first is treating the election as automatically beneficial. The credit is nonrefundable, carries forward five years, and interacts with the other state tax credit in a way that can leave an owner with California income in multiple states worse off. The second is the consent decision, because owners with different residency or different federal positions do not all benefit equally, and the election binds all of them.

The annual minimum franchise tax applies per entity, and it applies whether or not the entity earned anything. LLCs pay it in addition to a fee tied to California-source gross receipts, which steps up through several tiers. A structure assembled over several years for reasons that made sense at the time can quietly cost several thousand dollars a year in fees alone.

Disregarded single-member LLCs are a frequent source of surprise. Being disregarded for income tax purposes does not exempt an LLC from the franchise tax or the fee, and each one in the chain is charged separately.

Out-of-state entities

Forming in Nevada, Wyoming, or Delaware does not by itself avoid California. An entity managed from California, or doing business here, generally has a California filing obligation and owes the same fees. The formation state changes the corporate law, not the tax.

Cleaning up

Where entities can be consolidated or dissolved, the sequencing matters. Dissolution has its own filing requirements and timing, and an entity that is simply abandoned continues to accrue the annual tax. Where a new entity is under consideration, the ongoing California cost belongs in the decision rather than after it.

Section 1202 can exclude a substantial amount of gain on qualifying small business stock from federal tax. California repealed its version years ago and has not restored it. The entire gain is taxable to California at ordinary rates, with no capital gain preference, because California does not have one.

For a founder at the top California bracket, plus the additional tax on income above one million dollars, that turns an exit people model as largely tax-free into one with a substantial state bill. The federal planning is often excellent and the state result is simply absent from the model.

What is actually available

Less than people hope, and almost all of it is time-dependent. The timing of the sale, the structure of the consideration, the use of installment treatment where it fits, and in some cases a genuine change of residency well in advance of the transaction. That last one is frequently raised and rarely realistic on the timeline people have in mind.

Why the conversation belongs early

Every option here closes as the transaction approaches. Once a letter of intent is signed, the planning is mostly reporting.