Thailandの税務居住ルール：180日テスト
180日のしきい値
Thailandにおける180日ルールの仕組み
Thailand uses a 180 day threshold per calendar year. Since 2024, overseas income remitted to Thailand is taxable for residents.
暦年（1月〜12月）. これは、日数カウントが毎年1月1日にリセットされることを意味します。前年の日数は繰り越されません。
180日を超えると、Thailandは税務居住者としてあなたの全世界所得に課税する可能性があります。具体的な影響は、個人の状況、適用される租税条約、所得の種類によって異なります。
日数のカウント方法
Thai tax residency turns on a single threshold: spend 180 days or more in Thailand in a calendar year (aggregate, not continuous) and you are resident. As a resident, you pay Thai tax on Thai source income, plus on foreign source income to the extent the remittance rules introduced in 2024 bring it into the Thai tax base.
1日とみなされる条件
Any day of presence in Thailand counts toward the total, arrival and departure days included, and the count resets each calendar year.
日数以外の判定基準
Thailand does not run a separate residency test based on domicile or ties; the 180 day count is the sole criterion. Stay below 180 days and you are non resident, taxed only on Thai source income.
特別税制
The Long-Term Resident (LTR) visa is the headline product. It grants a 10 year stay and a flat 17% personal income tax rate for qualifying highly skilled professionals, and it exempts foreign source income earned outside Thailand from Thai tax under specific conditions. Other long stay visas (Elite, retirement) are immigration products only and do not change your tax position on their own.
租税条約
Thailand has tax treaties with most major economies. They can credit foreign tax paid against Thai tax on the same remitted foreign source income, which is the main relief on offer.
よくある質問
What changed with foreign income in 2024?
From 1 January 2024, foreign source income earned by Thai tax residents is taxable in Thailand once it is remitted, no matter when the remittance happens. The old rule, which exempted income remitted in a later year than it was earned, is gone. Subsequent guidance has kept refining the detail, so check with an adviser for the current treatment of your income types.
Does the LTR visa exempt foreign income from Thai tax?
Qualifying LTR visa holders (Wealthy Global Citizens, Wealthy Pensioners, and Work-from-Thailand Professionals among them) are exempt from Thai tax on foreign source income earned abroad and brought into Thailand, subject to the conditions attached to each category.
Does the Thailand Elite visa make me tax resident?
No. The Elite visa is purely an immigration scheme and does not change your tax position. Thai tax residency is decided separately by the 180 day rule.
公式情報源: https://www.rd.go.th/english/