You can sell the house in Pasadena, ship the car, and land in Alicante with a one-way ticket. The Franchise Tax Board can still decide you never left.
That is the first surprise in the California-to-Spain tax picture. The second is that Spain won't tax you the day you arrive, and the IRS will keep taxing you the day you do. Moving countries changes who gets a slice of your income. It doesn't make the slicing stop.
I'm not a tax adviser, and this isn't tax advice. Treat it as the map you bring to a cross-border CPA, so the hour you pay for goes to your situation instead of the basics.
Here's the short version:
California taxes residents on worldwide income. Once you're truly a nonresident, it only taxes California-source income.
The IRS taxes US citizens on worldwide income wherever they live. That doesn't change.
Spain taxes you on worldwide income once you're a Spanish tax resident (the 183-day line is one trigger, not the only one).
FBAR and FATCA reporting follow you to Spain.
Spain adds its own filings: Modelo 720 for foreign assets, and a wealth tax that bites at lower levels than most Californians expect.
Does leaving California actually end California income tax?
Only if California agrees you left. This is the part most relocation guides skip.
California taxes you as a resident if you're in the state for other than a temporary or transitory purpose, or if you're domiciled in California but outside it for a temporary purpose. Domicile is your true, fixed, permanent home and the place you intend to return to whenever you're away. You can have many residences but only one domicile.
There is no bright-line day count for leaving. The FTB's Publication 1031 instead applies a "closest connection" test: where are your ties strongest? The factors it lists include:
Where you spend your time
Where your spouse and children live
Where your principal home is
Where your driver's license, vehicle registration, and voter registration sit
Where your bank and investment accounts are
Where your professional and social ties are
Where your real property sits
No single factor decides it. The auditor builds a weighted picture of where your life is centered.
The one bright line cuts the other way: you're presumed a California resident for any year you spend more than nine months in the state.
There's also a safe harbor. A California domiciliary who works outside the state under an employment contract for at least 546 consecutive days can qualify as a nonresident, unless intangible income (interest, dividends, capital gains) exceeds $200,000 in the year or the move is principally about avoiding tax. Return visits of up to 45 days a year count as temporary. It's narrow, and it was written with overseas employment in mind, so don't assume a remote-work move qualifies without checking.
Two more facts to plan around:
California has no formal exit tax, but high earners are the ones who get audited when they leave. Law-firm summaries put the FTB's normal assessment window at four years from filing (six for a substantial understatement) and typical residency audits at 12 to 24 months through protest.
Nonresidents still owe California tax on California-source income. That includes wages for work performed in California, business income from California operations, and rent from California real property. Keep the Berkeley rental and you're still filing Form 540NR.
What helps is a dated paper trail that your life moved: a Spanish lease or deed, a residency card, a surrendered California license, changed voter registration, relocated accounts. A Spanish apartment plus a California license, a California voter registration and a house you "just rent out for now" tells two stories at once.
What doesn't change: the IRS
If you're a US citizen or green card holder, the IRS taxes your worldwide income wherever you live. A Spanish residence permit doesn't touch that. You'll keep filing Form 1040 every year.
The relief valve is the Foreign Earned Income Exclusion. For tax year 2026 it's $132,900 (up from $130,000 for 2025). To use it you must pass one of two tests: be a bona fide resident of a foreign country for an uninterrupted period that includes a full tax year, or be physically present abroad for at least 330 full days in any 12-month period.
Three catches worth knowing:
It covers earned income only, not dividends, interest, or capital gains.
A Bay Area salary can run well past $132,900, and the excess is taxed normally.
Spain may tax that same salary at higher rates than the US would, which is where the foreign tax credit comes in (below).
Do FBAR and FATCA still apply in Spain?
Yes, and your new Spanish bank account is exactly what they target.
FBAR (FinCEN 114): required if the combined value of your foreign financial accounts exceeds $10,000 at any point in the calendar year. The deadline is April 15, with an automatic extension to October 15.
FATCA (Form 8938): filed with your tax return. For US citizens living abroad, the thresholds are $200,000 at year-end or $300,000 at any time for single filers, and $400,000 at year-end or $600,000 at any time for joint filers. (In the US, the thresholds are $50,000 and $100,000 at year-end.)
These are information filings, not taxes. Missing them is what costs money, so put them on your calendar before you wire a deposit to a Spanish notary.
When does Spain start taxing you?
Spain treats you as a tax resident if you spend more than 183 days in Spain in a calendar year, or if your main center of economic interests is there. Spanish law also presumes residency if your spouse and dependent children live in Spain and you can't rebut it.
Residency for tax and residency for immigration are separate questions. A visa doesn't make you a taxpayer. Sleeping in Spain 184 nights does.
Once you're resident, Spain taxes worldwide income. The general scale for ordinary income runs from roughly 19% to 47% once regional rates are added, and the autonomous community you live in changes the numbers. For a Californian in a high bracket, this is where it gets interesting: California's top rate is gone from your life, but a Spanish top rate in the 40s may replace it.
Which brings us to the regime designed to soften that.
What is the Beckham regime, and can Digital Nomad Visa holders use it?
The Beckham regime (the special tax regime for "impatriates") lets new Spanish residents be taxed largely like non-residents for a fixed period. The headline terms:
24% flat on Spanish-source income up to €600,000 a year, and 47% above that.
Six tax years: the year you become resident plus five.
You must not have been a Spanish tax resident in the previous five years.
You apply within six months of starting work or registering with Social Security. Miss the window and it's gone.
Foreign investment income (dividends, interest, and most capital gains from outside Spain) generally isn't taxed by Spain under the regime. Employment income you earn while in Spain is taxable at the 24% rate wherever the employer is located.
Since the 2023 Startup Law, remote workers on a Digital Nomad Visa can qualify, provided the work is performed remotely for non-Spanish companies and Spanish-linked work stays small. The DNV itself requires income of at least 200% of Spain's minimum wage. With the 2026 minimum wage at €1,221 across 14 payments, that works out to about €2,849 a month (check the dollar conversion on the day you apply).
Here's the part where sources disagree, and I'd rather tell you than guess: employees of a foreign company working remotely clearly fit. Whether freelancers and self-employed DNV holders can use it is argued differently by different Spanish advisers. Some read the rule as employees only; others say self-employed remote workers qualify. Get a written opinion from a Spanish tax adviser before you build your plan around the 24%.
One more piece of honesty. The Beckham regime lowers what Spain takes. It does nothing to the IRS. Your US return still reports everything, which brings us to credits.
For the visa side, read our guide to the Spain digital nomad visa for Californians.
Not sure which route fits your income? Book a free consultation and we'll point you to the right Spanish adviser before you sign a lease.
How does the US-Spain tax treaty avoid double taxation?
The US and Spain have an income tax treaty from 1990, updated by a protocol that entered into force on November 27, 2019. It sets which country gets first claim on which income, and it caps withholding on cross-border dividends (15% in the general case), interest and royalties.
Two things it doesn't do for you as a citizen:
US treaties generally include a "saving clause" that lets the US keep taxing its own citizens as if the treaty didn't exist. So the treaty won't make you exempt from a US return.
The practical relief is the foreign tax credit. Income tax you pay to Spain can be claimed on Form 1116 against the US tax on the same income, instead of paying twice. If Spain's rate is higher than the US rate on that income, you usually owe the IRS nothing extra. If it's lower, you owe the difference.
The credit is not a wealth-tax credit. The treaty doesn't cover Spain's wealth tax, so that generally can't be claimed on Form 1116.
Form 1116 has mechanics (qualified dividends get adjusted, mortgage interest gets apportioned), which is CPA territory. What you control is the paperwork: Spanish tax assessments and payment receipts.
If you're buying, how US taxes treat Spanish property covers rental income, sale gains and depreciation in detail.
What are Modelo 720 and Modelo 721?
Spanish tax residents must declare foreign assets above €50,000 per category on Modelo 720. The three categories are separate, not added together:
Bank accounts abroad
Securities, funds and insurance abroad
Real estate abroad
For you, "abroad" means the US: your Schwab account, your 401(k) question mark, the condo in San Diego you kept.
Key points:
The filing window is January 1 to March 31 for the prior year.
After the first filing you only re-file when a category rises by more than €20,000, or you sell something reported.
Real estate is reported at acquisition cost, not current value.
Crypto held on foreign platforms or in self-custody falls under Modelo 721, same threshold, same deadline.
The old 150% penalties were struck down after the EU Court of Justice's January 2022 ruling and replaced by fixed fines. Confirm current amounts with a Spanish gestor.
US retirement accounts are an open question in practice. Get a Spanish adviser's opinion on your specific plan documents.
People properly enrolled in the Beckham regime are generally exempt from Modelo 720. That's another reason the regime matters.
Does Spain have a wealth tax?
Yes, and it's the one that surprises Californians.
Exemption: €700,000 per taxpayer, plus up to €300,000 for your main home if you're a Spanish tax resident.
Rates: a progressive national scale from about 0.2% to 3.5%.
Regions change the deal. Autonomous communities set their own scales, minimums and rebates, so check the rules for the region where you'd live.
Residents are taxed on worldwide assets, so US brokerage accounts and a California home you keep count toward the total. The €300,000 home break applies only to your main residence. Two people with identical net worth can owe different amounts depending on the region, so where you choose to live is a tax decision.
What changes, and what doesn't
What changes: California tax on your non-California income (if you've genuinely left), your daily tax residence, your marginal rate, and your filing list, which now includes the Spanish IRPF return, Modelo 720/721 and possibly wealth tax.
What doesn't: your US federal return, FBAR and Form 8938, California tax on California-source income, and the need for a paper trail.
The numbers persuade, so run yours. If you're buying in Valencia, our Valencia investment property page covers prices and yields, and the California-to-Spain pillar guide walks the whole move in order.
Quick answers
Do I still pay California taxes if I move to Spain?
Only on California-source income, such as rent from California property, if the Franchise Tax Board accepts you've left. It applies a closest-connection test, not a day count, and presumes residency past nine months in the state. Keep dated proof that your home, family and accounts moved. Inside Job Concierge can point you to cross-border CPAs.
Do US citizens pay tax in both the US and Spain?
Yes, you file in both countries, but the foreign tax credit usually prevents paying twice on the same income. The US taxes citizens on worldwide income wherever they live. Spain taxes residents on worldwide income, or only on Spanish income under the Beckham regime. FBAR ($10,000) and Form 8938 reporting continue.
How many days until I'm a Spanish tax resident?
More than 183 days in a calendar year makes you a Spanish tax resident. Spain also counts you as resident if your main economic interests are there, and presumes it if your spouse and dependent children live there. Tax residency is separate from your visa, so track days even in your first partial year.
Ready to run the numbers?
The consultation is free, and the roadmap is yours to keep whether you work with us or not. We'll look at where you'd live, what you'd buy and which tax questions to put to a Spanish adviser first.
Book your free Spain property consultation. We're in LA, so book on California hours.
Taxes change. Everything here is checked as of November 2026 and is general information, not legal or tax advice. Confirm your own numbers with a qualified cross-border tax professional.
