US State Taxes for Expats 2026: California, New York & How to Break Free

You did everything right. You sold your stuff, packed your bags, and moved to Portugal. You filed your federal taxes using the Foreign Earned Income Exclusion. You're feeling good.

Then you get a letter from the California Franchise Tax Board. They'd like their cut, please.

Welcome to the most overlooked nightmare in expat planning: state taxes don't automatically stop when you leave the country. And some states — California, New York, Virginia, South Carolina — will pursue you aggressively for years after you've left.

Here's what you need to know and exactly how to protect yourself.

The States That Won't Let Go

Not all states are created equal. Some have no income tax at all (lucky you if you're from Texas or Florida). Others have clear rules about when residency ends. And then there are the aggressive ones:

Tier 1 — The Worst Offenders:

California: The most aggressive state for taxing expats. Does NOT recognize the federal Foreign Earned Income Exclusion (FEIE). Doesn't allow foreign tax credits. Uses a "closest connections" test that can override day-counting rules.
New York: Maintains over 300 dedicated residency auditors who specifically target high-income taxpayers who claim to have left. The 548-day safe harbor has strict spousal requirements.

Tier 2 — Still Aggressive:

Virginia: Difficult to establish non-residency; requires significant documentation
South Carolina: Broad definitions of "domicile" that can trap expats
New Mexico: Considers you a resident until you formally establish domicile elsewhere

Tier 3 — Reasonable:

Massachusetts, Illinois, Maryland: Have clearer rules; generally respect legitimate departures
States with no income tax: Texas, Florida, Nevada, Wyoming, South Dakota, Alaska, Washington, Tennessee, New Hampshire (investment income only)

California: The Worst State to Leave From

California deserves its own section because it's uniquely terrible for expats. Here's why:

1. California ignores the FEIE entirely. The FEIE excludes $132,900 of foreign earned income from your federal taxes. California says "cool story, we don't care" and taxes your worldwide income at full state rates (up to 13.3%).

2. No foreign tax credits at the state level. If you're paying taxes in Spain or Portugal, you can credit those against your federal taxes (via the FTC). California doesn't allow this. You could theoretically pay taxes in both your new country AND California.

3. The 546-day safe harbor is a trap. California's safe harbor requires 546 consecutive days outside the state under an employment contract, with return visits limited to 45 days per tax year and intangible income under $200,000. Miss any condition and you fail the safe harbor entirely.

4. The "closest connections" test. Even if you pass the day count, California can argue you're still a resident based on: where your family lives, where your bank accounts are, where your doctor is, where you're registered to vote, where your driver's license is from, and where your personal belongings are stored.

New York: They Have People Looking for You

New York's approach is less about rules and more about enforcement. They employ 300+ auditors whose full-time job is finding people who claim to have left New York but haven't fully severed ties.

The 548-day safe harbor requires: strict spousal day requirements, proof of a foreign "permanent place of abode," and documented severing of NY ties.

Common triggers for a NY audit:

Keeping a NY apartment (even if you barely use it)
Having kids in NY schools
Maintaining NY professional licenses
NY-based social club memberships
Cell phone with NY area code (seriously)

How to Legally Break Free: The Step-by-Step Plan

Do this BEFORE you leave the country:

Step 1: Establish domicile in a no-income-tax state

Move to Florida, Texas, Nevada, Wyoming, or South Dakota first — even if it's just for a few months. Get:

Driver's license in the new state
Voter registration
Bank account at a local bank
Vehicle registration (if applicable)
A rental or mailing address (services like Anytime Mailbox work)

This creates a domestic domicile anchor that severs your ties to your old state.

Step 2: Sever ALL ties with your former state

Sell or vacate any property (or transfer to a trust with a non-resident trustee)
Cancel your old state driver's license
Update your voter registration
Move bank accounts
Change your address on all financial accounts, insurance policies, and subscriptions
Resign from state-based professional organizations

Step 3: Document everything

Keep a log of days spent in each location
Save flight records, hotel receipts, and lease agreements
Photograph your empty apartment on move-out day
Keep copies of your new state's driver's license and registration

Step 4: File a part-year return

In your departure year, file a part-year resident return in your old state through the date you left. This formally declares when your residency ended.

Step 5: Don't go back too often

Most states have day-count rules. California's 45-day return limit is well-known. New York is similar. Stay under the threshold, or document that visits are temporary and for specific purposes.

What If You Already Left Without Doing This?

If you moved abroad directly from California or New York without establishing domicile elsewhere, you're in a gray area. Here's what to do now:

Establish domicile in a no-tax state retroactively if possible (some people use a family member's address)
Hire a state tax specialist — not just an expat CPA, but someone who specifically handles state residency disputes
File non-resident returns going forward with documentation of your foreign residence
If audited, the burden of proof is on you to show you left. The more documentation, the better.

Key Takeaways

Moving abroad does NOT automatically end state tax obligations
California doesn't recognize the FEIE and has no foreign tax credits at the state level
New York employs 300+ auditors specifically targeting people who claim they left
Establish domicile in a no-tax state (FL, TX, NV, WY, SD) before moving abroad
Sever all ties: driver's license, voter registration, property, bank accounts
Document everything — you'll need it if audited years later
If you're already abroad without doing this, hire a state tax specialist immediately