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US Tax Help for Americans in Thailand
Short answer: Americans in Thailand file a US return on worldwide income, whether they teach, work remotely, run a business or are retired. All State Tax Resolution, led by Sabih Shafi, an Enrolled Agent, prepares the US side. Thailand appears on the IRS list of income tax treaties, but it has no Social Security agreement with the US, and we do not prepare Thai returns.
Key takeaways
A US citizen or green card holder in Thailand files a US return on worldwide income, and the IRS says the rules are generally the same as at home.
Thailand and the US have separate day counts. Thailand has a 180-day residency line. The US exclusion uses 330 full days in foreign countries, or a full-year residence test.
The exclusion is up to $130,000 for 2025 and $132,900 for 2026, but not for pensions or Social Security benefits.
Thailand is on the IRS treaty list, and the Social Security Administration lists no agreement with Thailand.
A US return is in dollars, so Thai baht income and balances must be converted.
Do Americans in Thailand have to file a US return?
Yes, in most cases. The IRS says you are taxed on worldwide income from all sources, and the filing rules are generally the same abroad as at home. Living in Bangkok, Chiang Mai, Phuket or on an island does not change that for a citizen or a green card holder.
The regular due date is April 15. If you live outside the US and your main place of business or post of duty is outside the US on that date, you get an automatic two extra months, to June 15, by attaching a statement. Interest on tax you owe still runs from April 15. Form 4868 adds four more months, to October 15, for filing only.
Thailand and the US count days differently
Thailand and the US each count days, and the counts do not match. The Thai Revenue Department's English page says a resident is someone who lives in Thailand for more than 180 days in a calendar year. It says a resident pays Thai tax on Thai income and on the part of foreign income that is brought into Thailand. Those are Thai rules, and the page is a summary, so check current rules with a Thai adviser. They do not decide your US result.
The US exclusion has its own tests. The physical presence test needs at least 330 full days in foreign countries in any 12 months in a row. A full day is the 24-hour period that starts at midnight, and time on or over international waters does not count. The IRS says you can count days abroad for any reason, so long as your tax home is in a foreign country. A weekend in Cambodia or Vietnam still counts as a foreign day. A week back in the US does not.
The other test, bona fide residence, needs an uninterrupted stay in a foreign country that includes an entire tax year. Whichever test you use, you also need a tax home in a foreign country, and the IRS says your tax home is not abroad while your abode stays in the US.
Exclusion or credit
The foreign earned income exclusion, claimed on Form 2555, leaves up to $130,000 of foreign earnings out of US income tax for 2025, and up to $132,900 for 2026, per person. Foreign earned income means pay for work you do abroad, so a teacher at a Thai school or a remote worker who does the work from Thailand is a typical fit. The IRS says it does not include pension or annuity payments, including social security benefits, or pay from the US government.
The foreign tax credit, claimed on Form 1116, reduces your US tax by qualifying foreign income taxes. The IRS says you cannot take a credit for tax on income you exclude. We run both and show you the result before you choose. The exclusion lowers income tax only, not self-employment tax.
A treaty, but no Social Security agreement
The IRS list of US income tax treaties includes Thailand. The IRS also says most income tax treaties contain a saving clause that stops a US citizen or resident from using the treaty to avoid tax on US source income. So the treaty is not a way around US tax, but specific articles can matter for specific income. We read the treaty for your facts rather than assuming.
The Social Security Administration's list of agreements in force does not include Thailand. For employees, the IRS says US social security and Medicare taxes generally do not apply to wages for work you do outside the US, unless an exception applies, such as working for an American employer. For the self-employed, the Social Security Administration says US coverage extends to US citizens and residents wherever they work, so they are almost always covered by both countries. An agreement is what fixes that, and there is none. A freelancer in Thailand normally owes US self-employment tax on net earnings.
Baht, bank accounts and FATCA
You must report amounts on a US return in US dollars. The IRS says you generally use the exchange rate in effect when you receive, pay or accrue the item, and that it has no official exchange rate but generally accepts any posted rate used consistently. The IRS yearly average rate table lists the Thai baht. We pick one method and apply it every year.
FBAR (FinCEN Form 114). FinCEN says you must file if your foreign financial accounts together exceed $10,000 at any time in the calendar year. It is filed online with FinCEN, not with your return, and due April 15 with an automatic extension to October 15.
Form 8938. It is attached to your return. If you live abroad by the IRS definition, the thresholds are above $200,000 on the last day of the year or $300,000 at any time for a return that is not joint, and $400,000 or $600,000 for a joint return.
The US Treasury lists an intergovernmental agreement with Thailand as in force. The IRS says FATCA generally requires foreign financial institutions to report on assets held by their US account holders. Treat your Thai accounts as visible to the IRS.
Behind on US filing from Thailand?
We often see Americans in Thailand who were never told they had to file. The streamlined foreign offshore procedures are for people abroad whose failures were non-willful. The IRS asks for returns for the most recent three years with a passed due date, FBARs for the most recent six years, all tax and interest paid with the returns, and Form 14653 certifying non-willful conduct. You need no US abode and at least 330 full days outside the US in one of the three years.
The IRS says a filer who qualifies and follows the instructions is not subject to failure-to-file, failure-to-pay, accuracy-related, information return or FBAR penalties, unless an exam finds fraud or a willful FBAR violation. A civil exam or criminal investigation already underway rules the procedures out. If your conduct may have been willful, talk to us before filing.
State taxes after you move
California's Franchise Tax Board treats you as a resident if you are domiciled in California but outside the state for a temporary or transitory purpose. Other states have their own tests. We check your last state's rules instead of guessing.
How we help
I am Sabih Shafi, an IRS Enrolled Agent, federally licensed to represent taxpayers before the IRS in all 50 states. We work by phone and video, in English or Spanish, with Americans anywhere in Thailand.
Your US return: Form 1040 with Form 2555 or Form 1116, run both ways.
Day counting: we build your foreign-day calendar so the 330-day test is documented.
Foreign account reports: FBAR and Form 8938 checks.
Missed years: several unfiled years prepared, with a straight answer on whether streamlined fits.
A flat fee quoted in writing before work starts.
Frequently Asked Questions
I teach English in Thailand. Do I file a US return?
Yes, if you are a US citizen or green card holder with income above the filing threshold. Pay for teaching in Thailand is foreign earned income, which the exclusion can cover if you meet the tests.
Does Thailand have a tax treaty with the US?
Yes. Thailand is on the IRS list of US income tax treaties. Most treaties contain a saving clause, so we check the specific article for your income.
Does time in Cambodia or Vietnam count toward the 330 days?
Yes, if you spend the full day in a foreign country and your tax home is abroad. The IRS counts days in foreign countries, not only days in one country.
Do I need an FBAR for my Thai bank account?
If all your foreign accounts together exceed $10,000 at any time in the year, yes. Balances are added across accounts.
Can you prepare my Thai tax return?
No. We prepare the US side only, and work with the figures your Thai preparer gives us.
I have not filed US returns since I moved. What now?
Book the free review before filing anything. We see which years are missing and whether the streamlined procedures fit.
General information, not tax advice for your situation.
Related Reading
Talk to an Enrolled Agent
This article is general information, not individual tax advice. If you want to talk through your own IRS or state balance, book a free 20-minute review or call or text us directly.
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