Your final California tax year

Form 540NR: the part-year resident return

In the calendar year you move out of California, you're not a full-year resident and you're not a full-year nonresident — you're a part-year resident, and you report that on Form 540NR, California Nonresident or Part-Year Resident Income Tax Return. The form asks you to separate your income into two buckets: what you earned while a California resident, and what you earned after you became a nonresident.

While you were a resident, California taxes all your income, from any source, the same as it always has. After your residency ends, California can only tax income that is sourced to California — meaning the state where the income was earned or the asset is located, not where you happen to live when you receive it.

What California can still tax after you leave

A clean residency change stops California from taxing your worldwide income, but it doesn't make you invisible to the state. Several categories of income stay taxable by California regardless of where you live when you receive them, because the income itself is tied to the state.

• Wages for work physically performed in California, even for a few days of travel back for meetings — see Jobs, remote work and income for how this is tracked
• Rental income from California real estate you keep after moving — see Selling your California home for the sell-vs-rent tradeoffs
• Income from a business operating in California, even if you personally live elsewhere
• Gain from the sale of California real property, regardless of your residency at the time of sale
• Some California-source trust and partnership income, which has its own sourcing rules

What generally is not taxable once you're a genuine nonresident: investment income (interest, dividends, capital gains on stocks), wages from work performed outside California, and most pension and retirement account distributions, which are protected from source-state taxation by federal law. See Retiring out of California.

Timing a bonus, RSU vesting, or home sale around your move

Because California taxes income earned while you're a resident at full California rates, the calendar matters. If you have real control over the timing of a liquidity event, it's worth running the numbers before you lock in a date.

Bonuses and RSU vesting

A bonus paid, or restricted stock that vests, while you're still a California resident is generally taxed by California in full. The same income received after your residency has genuinely ended is typically sourced based on where you performed the work that earned it — which can mean it's apportioned between California and your new state, or not taxed by California at all, depending on the facts. If your employer can delay a vesting date or bonus payout by even a few weeks, and your move date is firmly documented, the tax difference can be substantial.

Selling your home

If you're selling your California house, the gain is California-source income no matter where you live when escrow closes — moving first doesn't exempt the sale. What moving first can affect is whether the home still qualifies for the federal home-sale exclusion (generally requiring it to have been your main home for 2 of the last 5 years), and whether you're filing as a resident or nonresident for that tax year. See Selling your California home for the full sequencing discussion.

How to allocate income between the two periods

The 540NR requires you to attach a schedule showing which income belongs to the resident period and which belongs to the nonresident period. For salary and wages, this is usually a straightforward date split based on your pay stubs. For self-employment income, business income, and investment income, the allocation can be more involved.

Records to keep for your final return

Audits of a part-year return focus on the boundary date — the day you stopped being a California resident — more than almost anything else on the form. The stronger your documentation of that date, the simpler the return and any later questions about it.

• A signed lease or closing statement for your new-state home, dated
• Your final California pay stub and first pay stub reflecting the new state (if you kept the same employer)
• Moving company contract and bill of lading showing the move date
• Utility final-bill and shutoff dates in California, and new utility setup dates in the new state
• Any home sale closing statement, with the closing date clearly shown
• A simple travel log for the year if you had legitimate back-and-forth travel

Keep these together in one folder — physical or digital — for at least the number of years California can go back and question a return.

Estimated payments and withholding during the transition

If you have income that straddles the move — especially self-employment or business income — make sure your estimated tax payments reflect the split correctly rather than defaulting to one state. Underpaying California while you were still a resident can trigger penalties even if your total tax for the year is otherwise correct, because California calculates underpayment penalties on a quarterly basis tied to when the income was actually earned.

If your employer continues withholding California tax after your actual move date because the address change hasn't been processed yet, you'll get that back as a refund when you file, but it's worth fixing the withholding promptly rather than waiting a year to recover the overpayment.

Putting your final year together

The part-year return isn't more complicated than a normal return, but it does require you to think in two distinct periods rather than one. The cleanest way through it is to nail down the move date with real documentation first, then let everything else — income allocation, withholding, estimated payments — follow from that date rather than being reconstructed after the fact at tax time.

For the broader residency question this return depends on, see Establishing residency in a new state, and for the full planning sequence, see the California exit planner.