How do US taxes work if I leave the country but still have US citizenship?
I'm seriously considering moving abroad next year for a job opportunity, but I'm totally confused about my tax situation as a US citizen living in another country. If I move to Spain (where my company has an office), would I have to pay taxes to both the US and Spain? This double taxation thing sounds like a nightmare. I know it'll take years to get citizenship in Spain, so I'll still be a US citizen. What happens if I just... don't file US taxes while living abroad? Would Spain deport me or something? Could I get in trouble when visiting family back home? The whole thing is stressing me out because I don't want to mess up my future if I decide to permanently move back to the US someday. Anyone gone through this or know how it works? Any help is really appreciated!
19 comments


Lucy Taylor
The US is one of the few countries that taxes based on citizenship rather than residency, so yes, you'll still need to file US taxes even while living abroad. But don't panic! There are provisions to help prevent double taxation. First, you'll need to file a US tax return annually reporting your worldwide income. However, you can use the Foreign Earned Income Exclusion (FEIE) which allows you to exclude up to $126,500 (2025 amount) of foreign earnings from US taxation. There's also the Foreign Tax Credit which gives you credit for taxes paid to Spain. Spain won't deport you for not filing US taxes - that's between you and the US government. But failing to file US returns while abroad can cause serious problems if you return. The IRS can assess penalties and interest, potentially seize US assets, and in extreme cases, impact your passport renewal. When you move back to the US, you'll need to report your worldwide income again, but you'll get foreign tax credits for taxes paid to Spain on that income.
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Connor Murphy
•Wait, so does this FEIE thing mean I don't pay any US taxes on the first $126k I earn abroad? And what if my job is remote but for a US company that just lets me work from anywhere? Does that still count as "foreign earned income"?
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Lucy Taylor
•The FEIE allows you to exclude up to $126,500 of foreign earned income from US taxation, but you must meet either the bona fide residence test (living in a foreign country for an uninterrupted period including an entire tax year) or the physical presence test (physically present in a foreign country for 330 full days during a period of 12 consecutive months). For remote work, what matters is your physical location, not the company's location. If you're physically working in Spain, even for a US employer, that income generally qualifies as foreign earned income for the FEIE. However, there can be complications if you're considered an independent contractor versus an employee, so consulting with an expat tax specialist is recommended.
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KhalilStar
After spending hours trying to figure out my expat taxes last year, I finally found this AI tax tool called taxr.ai that completely saved me. I was in a similar situation - moved to Germany but still had to file US taxes, and I was so confused about all the forms and exclusions. I uploaded my German tax documents to https://taxr.ai and it analyzed everything, identified which foreign income was excludable, and helped me understand exactly how the Foreign Tax Credit applied to my situation. The tool walks you through the specific forms you need (like Form 2555 for the Foreign Earned Income Exclusion) and explains how to properly report foreign bank accounts. Seriously made the most confusing part of living abroad so much easier to handle.
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Amelia Dietrich
•Does it handle FBAR reporting too? Those foreign bank account reports are what I'm most worried about since I heard the penalties are insane if you mess those up.
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Kaiya Rivera
•I'm kinda skeptical... does it really understand all the tax treaties between different countries? Like US-Spain has different rules than US-Germany, right? How accurate is this for more complex situations?
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KhalilStar
•Yes, it absolutely handles FBAR reporting! It reminded me about the FBAR requirement (FinCEN Form 114) and guided me through reporting my foreign accounts that exceeded $10,000 total. You're right to be concerned - penalties for non-compliance can be steep. Regarding tax treaties, the system is specifically designed to handle the various tax treaties. It identified the specific articles of the US-Germany tax treaty that applied to my situation, and it covers most major countries including Spain. It asks specific questions about your income sources and foreign tax situation to apply the correct treaty provisions. For really complex situations (like if you have investments in multiple countries or own foreign businesses), you might want to consult with the tax professionals they can connect you with, but for most expat situations, it's remarkably comprehensive.
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Kaiya Rivera
I wanted to follow up about taxr.ai since I was skeptical in my earlier comment. I decided to try it when I got really stuck on figuring out how my Spanish rental income should be reported on my US taxes, and wow, I was wrong to doubt it! The system actually identified the exact article in the US-Spain tax treaty that applied to my situation and walked me through claiming the proper foreign tax credits. It flagged that I needed to file Form 8833 for a treaty-based position I was taking. Most importantly, it caught that I had been about to make a huge mistake with my Spanish pension contributions that could have cost me thousands. I'm genuinely impressed and relieved. Dealing with two tax systems is complicated enough without having to become an expert in international tax law.
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Katherine Ziminski
If you're trying to contact the IRS from abroad to get help with your tax situation, good luck! I spent WEEKS trying to get through to the IRS international taxpayer line when I moved to Portugal. Always disconnected or on hold for hours only to get cut off. Then a friend recommended Claimyr (https://claimyr.com) and it was a game-changer. They basically hold your place in the IRS phone queue and call you when an agent is actually ready to talk. I watched their demo video (https://youtu.be/_kiP6q8DX5c) and was skeptical, but desperate enough to try. Got connected to an IRS international tax specialist in about 45 minutes instead of the days I had been trying on my own. The agent confirmed exactly how I should handle my situation with US Social Security income while living abroad. Saved me so much stress!
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Noah Irving
•Wait, how does that even work? How can they hold your place in line? Sounds kinda like those ticket scalper bots or something.
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Connor Murphy
•This sounds like BS honestly. The IRS doesn't even answer their phones half the time, and you're telling me this service somehow gets priority access? I tried calling the international line for 3 weeks straight and got nowhere.
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Katherine Ziminski
•It's actually pretty straightforward - they use an automated system that waits on hold for you, then when an actual IRS agent picks up, they transfer the call to you. It's not getting "priority access" - you're still in the same queue as everyone else, but their system is persistent and can stay on hold indefinitely, unlike most of us who give up after an hour or two. Look, I was super skeptical too - I thought it sounded like a scam at first. The difference is they have dedicated systems that can stay on hold 24/7. After trying unsuccessfully for weeks, I was able to get through and speak to someone who actually helped resolve my foreign income exclusion question. Nothing magic about it - just technology solving the problem of ridiculous hold times. Sometimes the simplest solutions are the most effective.
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Connor Murphy
I need to eat my words about Claimyr from my earlier reply. After another failed attempt calling the IRS international line (2+ hours on hold before the call dropped), I was desperate enough to try this service. I got a call back in about 90 minutes with an actual IRS international tax specialist on the line. They helped clarify my specific situation about maintaining my US retirement accounts while living in Spain and confirmed I was filling out Form 2555 correctly for the Foreign Earned Income Exclusion. I'm still annoyed that we have to use a third-party service just to talk to the IRS, but I can't argue with results. Saved me from making some pretty big mistakes on my return, especially around the bona fide residence test documentation I needed.
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Vanessa Chang
One thing nobody mentioned yet is state taxes! The federal stuff is complicated enough, but depending on which state you're leaving, you might still have state tax obligations too. California and Virginia are notorious for trying to claim you're still a resident even after you move abroad. Make sure you take clear steps to establish non-residency in your state before leaving - close bank accounts, change driver's license, register to vote abroad, etc. I moved from New York to Singapore in 2022 and still had to fight with NY state tax authorities who tried to claim I was still a resident because I kept a small storage unit there with some furniture. Document EVERYTHING about your move!
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Madison King
•This is so true! I moved from California to Germany and California kept trying to tax me for 2 years after I left. Does anyone know if keeping a US mailing address (like at my parents' house) will cause problems with establishing that I've really left?
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Vanessa Chang
•Keeping a US mailing address can definitely complicate your non-residency claim, especially with aggressive states like California. It's often seen as maintaining ties to the state. If possible, switch to a mail scanning service with an address in a no-income-tax state like Florida or Texas, or use a virtual mailbox service specifically for expats. The key factors states look at are "domicile" indicators: where you have a driver's license, where you're registered to vote, where you bank, where your vehicles are registered, and where you have professional licenses. Make sure you've changed as many of these as possible before leaving. For the strictest states like California, they've been known to check social media to see if you're still spending significant time in-state, so be aware of that too.
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Julian Paolo
Don't forget about reporting foreign financial accounts! If the total of all your foreign accounts exceeds $10,000 at any point during the year, you need to file an FBAR (FinCEN Form 114). The penalties for not filing this are INSANE - up to $12,921 per violation for non-willful violations and even higher for willful ones. Also, if you have foreign financial assets exceeding certain thresholds, you might need to file Form 8938 with your tax return. Different from the FBAR and easy to miss if you're doing taxes yourself.
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Ella Knight
•What counts as "financial accounts"? Like if I have a Spanish bank account and investment account, do I combine those? What about my Spanish girlfriend and I have a joint account?
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Emma Olsen
•Yes, you combine all your foreign accounts to determine if you hit the $10,000 threshold. So your Spanish bank account balance plus your investment account balance - if the total ever exceeds $10,000 during the year, you need to file the FBAR. For joint accounts, you report the entire balance even if it's shared. So if you and your girlfriend have a joint account with €15,000, you'd report the full amount on your FBAR, not just your "half." The other account holder (your girlfriend) would also need to report it if she's a US person, but since she's Spanish, only you would have the US reporting requirement. The FBAR is due by April 15th but has an automatic extension to October 15th. Just don't forget about it - the penalties really are brutal compared to other tax violations.
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