When do you become tax resident in Thailand?

180 days or more in a calendar year. This is decided by the tax authority under domestic law and is separate from holding a residence permit, which is an immigration matter.

Does Thailand tax foreign income?

Foreign income is taxed when it is brought into Thailand. Income kept outside the country is not taxed, which makes the definition of a remittance the operative question.

Does Thailand have a tax treaty with the United States?

Yes — Thailand appears on the IRS list of in-force income tax treaties. That provides a tie-breaker where both countries claim you as resident, and can reduce withholding on US-source payments when claimed.

Can I keep my US LLC if I move to Thailand?

Yes — owning it is not the issue. The issues are how Thailand classifies it, whether managing it from Thailand makes it tax resident there, and whether your activity creates a taxable presence for it. Resolve those with a local adviser before you become resident.

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Relocation guide

Moving to Thailand: residence, tax and your company

Thailand is chosen for the life rather than the rate. Here is what being tax resident actually costs, and the conditions attached to the relief if you qualify for one.

The short answer

Tax residence in Thailand is determined by 180 days or more in a calendar year. Thailand operates a remittance basis, so foreign income is taxed when it is brought into the country and not before. The residence permit and the tax residence are separate things, granted by different authorities on different tests.

Two separate questions get collapsed into one whenever people write about moving to Thailand. The first is whether you are allowed to be there, which is immigration. The second is whether the tax authority counts you as resident, which is tax. They are decided by different bodies on different tests, and having the first does not give you the second.

This page keeps them apart, and states the facts that are specific to Thailand rather than the ones that are true everywhere.

The facts specific to Thailand


Usual route in	The Long-Term Resident visa for qualifying professionals, pensioners and wealthy applicants, or the Destination Thailand Visa introduced in 2024
Indicative cost	Moderate; the LTR carries an application fee and qualifying income or asset conditions
Time to obtain	Weeks to a few months
Presence needed to keep the permit	The DTV allows long multi-entry stays with a cap per entry; the LTR runs for years with annual reporting rather than a presence minimum
Domestic tax residence test	180 days or more in a calendar year
Basis of taxation	Remittance basis
US income tax treaty	Yes — in force per the IRS treaty table
CFC rules affecting resident individuals	None applying to individuals
Treatment of a US LLC	No settled published position
Route to citizenship	Ten years or more, heavily discretionary, with language requirements
Dual nationality	Conditional — take advice before swearing anything

Immigration and tax positions for Thailand, last checked August 2026, taken from the sources listed at the foot of this page. Immigration thresholds in particular change every few years and several routes in this set have been rewritten recently. Verify before acting, and take advice on your own facts.

Getting the residence

The route most founders use is the Long-Term Resident visa for qualifying professionals, pensioners and wealthy applicants, or the Destination Thailand Visa introduced in 2024. Timeline: weeks to a few months. Cost: moderate; the LTR carries an application fee and qualifying income or asset conditions.

Keeping it is a separate condition from getting it. Here: the DTV allows long multi-entry stays with a cap per entry; the LTR runs for years with annual reporting rather than a presence minimum. That number is the one to plan travel around, and it is frequently different from the number that decides your tax position.

When you become tax resident

The domestic test is this: 180 days or more in a calendar year.

What being resident here costs

Foreign-source income is taxed when brought into Thailand. The treatment was rewritten with effect from 2024 and has been revised since — this is the least settled regime in the set.

A remittance basis is not the same thing as a territorial one, and the difference is the whole risk. Your foreign income is untaxed while it stays outside Thailand. That makes the definition of a remittance load-bearing, and those definitions get rewritten — which is exactly what has happened here.

What happens to your company

There is no clearly settled published position on how Thailand classifies a US LLC. That is the honest answer for most of the world, and it means the question has to be resolved with a local adviser on your facts rather than assumed from how the IRS treats it.

There are no controlled-foreign-company rules applying to resident individuals here, which removes one of the three doctrines that usually catch founders. The other two still apply: your company can become tax resident where it is managed from, and it can create a taxable presence through what you do there. The distinction between them is worth being precise about.

The treaty position

Thailand has an income tax treaty in force with the United States. That gives you a tie-breaker if both countries claim you as resident, and it can reduce withholding on US-source payments — claimed rather than automatic, generally on a Form W-8BEN.

Banking

Openable with the right visa category, and difficult without one.

Whatever you open locally, the account-opening form will ask which countries you are tax resident in and will report accordingly — see what your bank reports. The general picture across jurisdictions is here.

Where the route ends

Citizenship: ten years or more, heavily discretionary, with language requirements. The dual-nationality position is conditional, and formal renunciation requirements are not always applied as written — confirm it in both directions before you reach the oath.

The years only count if the permit you hold is a reckonable one and you are actually present for the required part of it — the two clocks run separately, and only one of them appears in most marketing.

What goes wrong in Thailand

The order to do this in

Settle the exit first. What it takes to stop being resident where you are now, and whether leaving triggers an exit charge. This is the half that decides the bill.
Resolve the company question before you land, not in your first filing season — classification, management and any local registration obligation.
Get the permit, and diarise the presence condition that keeps it alive.
Register with the tax authority and meet the domestic residence test deliberately rather than incidentally.
Request the certificate of tax residence for the first full year, and every year after. It is the document every other party in this story will ask you for.
Record presence contemporaneously — entry and exit dates, per country. Both the permit and the tax position depend on it, and neither can be reconstructed convincingly from memory.

The move, tracked rather than remembered

Presence by country, residence status, permit conditions and the filings each one creates — recorded from the day you land so the position you rely on is evidenced.

See how residency works

Frequently asked questions

When do you become tax resident in Thailand?: 180 days or more in a calendar year. This is decided by the tax authority under domestic law and is separate from holding a residence permit, which is an immigration matter.
Does Thailand tax foreign income?: Foreign income is taxed when it is brought into Thailand. Income kept outside the country is not taxed, which makes the definition of a remittance the operative question.
Does Thailand have a tax treaty with the United States?: Yes — Thailand appears on the IRS list of in-force income tax treaties. That provides a tie-breaker where both countries claim you as resident, and can reduce withholding on US-source payments when claimed.
Can I keep my US LLC if I move to Thailand?: Yes — owning it is not the issue. The issues are how Thailand classifies it, whether managing it from Thailand makes it tax resident there, and whether your activity creates a taxable presence for it. Resolve those with a local adviser before you become resident.

Sources

Immigration routes, presence conditions, residence tests and tax treatment were taken from the authorities above and last checked in August 2026. Immigration thresholds in this area change every few years and several of these routes have been rewritten recently — verify before acting, and take advice on your own position.

Residency information is general and for orientation only. Eligibility, timelines and outcomes are determined by the relevant authorities, and applications are handled by licensed local partners.