How to Start a US LLC From Thailand

Putting it together: form the LLC (Wyoming and Delaware remain the two most common choices), get the EIN using the international applicant line above, open a Mercury or Relay account since neither restricts Thailand, and build a simple personal rule for how and when you remit LLC profit to Thailand, since that single act, not the LLC's income itself, is what triggers Thai tax under Por.161/162. Keep an eye on the Revenue Department's still-pending relief proposal, but plan around the rule that's actually in force today rather than the one that might be enacted next.

Here's the part worth getting right as of when this is written: the Thai Revenue Department has been drafting a measure since mid-2025 that would exempt foreign-sourced income from tax if it's remitted to Thailand within the same calendar year it's earned or the following year, effectively restoring something close to the pre-2024 rule with a defined window. This proposal has been widely covered and is often described online as if it's already in effect. As of mid-2026, it is still a draft: it requires Cabinet approval, Council of State review, and formal publication in the Royal Gazette before it becomes binding law, and none of those steps had been completed as of this writing. Planning your LLC's remittances around this exemption before it's actually enacted is a real risk — the rule that currently applies is Por.161/162 as described above, not the proposed relief. Confirm current status before assuming the friendlier rule is live.

Thailand's digital nomad and remote-work scene, along with a fast-growing base of Thai founders selling SaaS, e-commerce, and consulting services to global clients, has made a US LLC an increasingly common structure for accessing US payment infrastructure. For these founders, a US LLC solves the practical problems a Thai limited company often can't from the outside: direct Stripe and PayPal access as a genuine US entity, USD invoicing that avoids baht volatility, and a formation process considerably simpler than setting up a Thai company specifically to serve international clients. Thailand's Board of Investment has also separately promoted the country as a digital-nomad and remote-work hub, and a US LLC pairs naturally with several of Thailand's own long-term visa categories aimed at exactly this kind of founder. What makes Thailand's tax story genuinely distinctive in this series, though, is that its personal tax system underwent a fundamental restructuring in 2024 that changed exactly the question a founder needs answered: not whether the LLC's income will be taxed, but when you bring it home. Getting the timing right, not the structure, is where a Thai founder's real planning happens.

Getting an EIN as a Thai founder works exactly like it does for any other non-US resident. Without a US Social Security Number or ITIN, you can't use the IRS's online EIN application — you'll file Form SS-4 and either call the IRS's international applicant line (267-941-1099, staffed 6am-11pm ET, for international applicants only) to receive the EIN over the phone, or fax the SS-4 (855-215-1627 from within the US, 304-707-9471 from outside) for a roughly 4-business-day official turnaround that often takes 1-2 weeks in practice. Mailing to Cincinnati, OH takes 4-5 weeks and should be a last resort. On Line 7b, write 'Foreign' or 'N/A' rather than leaving it blank. The responsible party listed must be the actual Thai owner, not EasyBrise or any formation agent. If you lose your CP 575 confirmation notice, request Form 147C, a letter, not a duplicate, instead. Don't skip Form 5472 plus a pro forma 1120 each year; the penalty for missing it starts at $25,000.

On the banking side, Thailand is not on Mercury's or Relay's prohibited-country list, and Thai founders go through the same standard non-resident application process, passport, LLC formation documents, and EIN, as founders from most other countries in this series. There's no distinct Thailand-specific hurdle at the account-opening stage; the genuine complexity for Thai founders sits entirely in the remittance-timing question above, not in getting a US bank account.

For decades, Thailand taxed foreign-sourced income only if it was brought into the country in the same calendar year it was earned, a loophole that let residents simply wait a year before remitting funds tax-free. That changed with Revenue Department Order Por.161/2566, issued in September 2023 and effective January 1, 2024: foreign-sourced income earned by a Thai tax resident (someone present in Thailand 180 days or more in the year the income was earned) is now taxable whenever it's brought into Thailand, regardless of how many years have passed since it was earned. A follow-up order, Por.162/2566, clarified that this new rule only applies to income earned from January 1, 2024 onward — income earned before that date keeps the old same-year rule permanently. For a Thai founder's US LLC, this means profit earned starting in 2024 carries a tax liability that follows it indefinitely until the day it's actually remitted to Thailand.

The practical upside is that this system gives you a genuine, simple lever: as long as the LLC's profit stays in its US bank account and isn't remitted into Thailand, it isn't taxed under Thai personal income tax, no matter how large it grows or how long it sits there. This is meaningfully different from the CFC-style attribution regimes covered elsewhere in this series, where ownership alone can trigger annual taxation on undistributed profit regardless of whether you ever bring the money home. For a Thai founder reinvesting most of the LLC's earnings into the business itself, US ad spend, contractor payments, tooling, none of that counts as a remittance to Thailand, so those retained earnings simply aren't part of the Thai tax calculation. This makes the timing of personal draws, not the LLC's income itself, the actual planning variable worth tracking. Founders should keep clean records distinguishing personal remittances from ordinary US-based business expenses, since Thai tax authorities look at what actually crosses into a Thai bank account, not at the LLC's overall profit figure.

The US-Thailand tax treaty, in force since December 1997, contains a provision that's directly relevant to how a Thai founder's US LLC income gets treated: Article 25's double-taxation relief is explicitly limited when a treaty partner taxes income on a remittance basis, meaning Thai relief for US-sourced tax generally only extends to income actually remitted or received in Thailand during the relevant period, not income earned but left abroad. This isn't treaty boilerplate; it's a clause negotiators wrote specifically because remittance-basis taxation was already part of Thailand's system at the time, decades before Por.161 sharpened it further. Combined with the FTC and treaty relief being largely irrelevant anyway for LLCs earning $0 US federal tax, the treaty's practical value here is mostly in residency tie-breaker rules and future flexibility rather than an active double-taxation shield.

Thailand has no formal controlled foreign company regime of the kind covered in Colombia, Uruguay, or Indonesia elsewhere in this series, where ownership percentage alone can trigger annual attribution regardless of distribution. Instead, the remittance-basis system does similar work through a different mechanism: rather than taxing you on the LLC's profit as it's earned based on your ownership share, Thailand simply waits until you personally bring money into the country, then taxes it at that point, however long that takes. The practical effect for a founder who mostly reinvests LLC profit and draws modest personal transfers is genuinely lighter than a CFC regime would be, since there's no ownership-triggered annual inclusion to track, just remittance timing. Documenting when and how much is remitted becomes the equivalent of what other countries track through formal CFC attribution paperwork, just triggered by a bank transfer instead of a fiscal year-end calculation. Founders planning eventual retirement or relocation back to full-time Thailand residency should build this remittance timing into long-term planning well before it becomes urgent.