Leaving California with Equity: What the State Can Still Tax After You Move

Moving to a no-income-tax state before you exercise or vest doesn't end California's claim. The state sources equity income to where you did the work, and the period it measures depends on the type of award.

A common plan goes like this: move to Nevada, Texas, Washington or Florida, establish residency, and then exercise options or let RSUs vest, free of California tax. The plan isn't wrong, but it's incomplete. California taxes nonresidents on income from California sources, and it treats equity compensation as income earned where you performed the services. A move changes where future work happens. It doesn't erase the work you've already done here.

Key points

• California sources equity compensation using a workday allocation: California workdays divided by total workdays over a defined period.

• For RSUs and restricted stock, the period runs from grant to vesting.

• For non-qualified options, the period runs from grant to exercise, or to the end of employment if earlier.

• Appreciation after the compensation is fixed is generally sourced to where you live when you sell.

• Moving partway through a period reduces California's share but rarely eliminates it.

The governing principle

The Franchise Tax Board's guidance, Publication 1004, sets out a workday method. California counts the days you worked in California during the relevant period, divides by your total workdays in that period, and applies the ratio to the compensation.

Allocation ratio = California workdays in the period ÷ total workdays in the period

So the questions are always the same: what is the period for this award, and where did you work during it?

How each award type is sourced

RSUs and restricted stock. The compensation is the value at vesting, and the period runs from grant to vest. If you worked in California for the first two years of a four-year vest and elsewhere for the last two, roughly half of the vesting income is California-source, even though you were a nonresident when it vested.

Non-qualified options. The compensation is the spread at exercise, and Publication 1004 measures the period from grant to exercise, or to the date employment ended if earlier. That has a consequence people miss: if you keep working for the same employer after moving, and exercise later, your out-of-state workdays keep adding to the denominator, and California's share shrinks. If you leave the company when you move, the period ends there, and California's share is fixed at that point.

Incentive stock options. For regular tax, nothing happens at exercise. If you later make a disqualifying sale while a nonresident, the ordinary-income portion is sourced like an NSO, by workdays from grant to exercise. After a qualifying sale as a nonresident, the gain is generally capital and sourced to your state of residence at sale. California's AMT treatment of an exercise made after you move is an area to model carefully rather than assume, since the state may treat part of the spread as California-source.

Income component	Sourcing period	Effect of moving
RSU or restricted stock vesting value	Grant to vest	Reduces California's share only for workdays after the move
NSO spread at exercise	Grant to exercise, or to end of employment if earlier	Out-of-state workdays before exercise reduce California's share
ISO disqualifying sale, ordinary portion	Grant to exercise	Same as NSO
ISO qualifying sale gain	Residency at sale	Can move outside California
Growth after vest or exercise	Residency at sale	Can move outside California

Example

You were granted RSUs on January 1, 2024, vesting in full on January 1, 2028. You work in California until January 1, 2026, then move to Nevada and keep the same job remotely. About half of the grant-to-vest workdays were in California, so about half of the 2028 vesting income is California-source, taxed on a nonresident return, even though you've lived in Nevada for two years. If you hold the shares and sell them in 2030 at a higher price, the growth after vesting is generally Nevada's to tax, which is to say untaxed.

What drives the actual number

• The grant dates and vesting schedules of every award, since each has its own period.

• Your workday history, including remote days, business travel and days worked outside California before the move.

• The move date, and whether you stay with the same employer afterward.

• For options, the exercise date, and whether you exercise before or after leaving.

• Your other California ties after the move: a home, a business, family or professional licenses can call into question whether you've actually become a nonresident.

California is careful about this

California examines departures closely, particularly when a large equity event follows soon after a move. Contemporaneous records of your move date, a defensible workday history over each award's period, and a clean break of residency ties all matter. The time to assemble them is before you leave, not when a notice arrives.

A move is one of the most powerful moves on the board for an executive with equity. It's also one of the most commonly misplayed, because the rules that decide its value were set years earlier, on the grant date.

The engineer and the chess player

The workday allocation is engineering: dates, ratios, award-by-award periods. The decision about when to move, and what to do before and after, is chess. Exercising options before departure may simplify sourcing but adds income in a California year. Staying with your employer after the move can shrink California's share of future NSO exercises. Holding vested shares until after the move can shift their growth out of California. The right sequence depends on your grants, your move date and the rest of your income, modeled together.

What to take from this

If you're planning a move and hold equity, California's claim depends on facts already fixed by your grant dates and your work history, and on choices still open to you. A model built before the move shows which is which.

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Discuss your situation with Natalie C. Papagni, CPA

If a move is on the horizon and you hold options, RSUs or restricted stock, modeling the move date against your grant schedule before you go is the natural first step. A complimentary 30-minute consultation is a good place to start.

Natalie C. Papagni, CPA — Tax, Planning & Advisory Services 4275 Executive Square, Suite 200, La Jolla, CA 92037 (858) 754-8277 | service@lajollataxcpa.com | lajollataxcpa.com

Disclaimer: This material is provided for general educational purposes only. It is not tax, legal or accounting advice, and it does not create a CPA–client relationship. Tax outcomes depend on individual facts and circumstances, and figures and rules change from year to year. Consult a qualified professional about your specific situation before acting. Reflects California Franchise Tax Board Publication 1004 and 18 CCR §17951-5; examples are illustrative.