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🇮🇩 Thai Law vs Indonesian Law: Key Differences
Comparative guide highlighting differences between Thai and Indonesian legal systems for Indonesian nationals and Indonesia-Thailand business operators.
Indonesia operates a mixed legal system combining Dutch-influenced civil law (the colonial-era Burgerlijk Wetboek), customary adat law, and Islamic law for Muslims in personal status matters. Thailand is a unitary secular civil law system. Both are ASEAN members with significant cross-border trade and migration flows.
Comparison Table
| Area | 🇹🇭 Thai Law | 🇮🇩 Indonesia | Key Difference |
|---|---|---|---|
| Legal System Basis | Unitary civil law (Continental European model). Single national legal code. Secular courts. | Mixed: Dutch civil law (KUHP / KUHPerdata) + adat customary law + Islamic family law for Muslims. 34 provinces with limited regional law-making. | Indonesia layers civil, customary, and religious systems; Thailand applies one secular code uniformly. |
| Constitutional Framework | Constitution replaced 20 times since 1932; 2017 constitution currently in force. | 1945 Constitution (UUD 1945) with 4 amendment periods (1999-2002). Reformasi-era constitutional court active. | Indonesian Constitutional Court (Mahkamah Konstitusi) plays an active rights-protection role with no equivalent practical reach in Thailand. |
| Visa Status with Thailand | Indonesia is on the 93-country visa-exempt list — 60 days visa-exempt. | Indonesia offers visa-on-arrival and visa-exempt regimes for Thai nationals — typically 30 days. | Both nationalities have streamlined short-stay entry as ASEAN members. |
| Business Formation | Foreign Business Act B.E. 2542. Most sectors require majority Thai ownership; BOI promotion eases. Minimum 2 shareholders. | Investment Law (UU 25/2007). DNI (Negative Investment List) restricts foreign ownership in listed sectors; OSS (Online Single Submission) modernises licensing. PT PMA (foreign-investment company) structure standard. | Both restrict foreign ownership but Indonesia's Negative Investment List and the post-2020 Omnibus Law on Job Creation have liberalised more sectors than Thailand's FBA. |
| Halal + Islamic Finance | Halal certification administered by CICOT (สำนักงานคณะกรรมการกลางอิสลามแห่งประเทศไทย). Sharia banking via specific licences. Mostly Buddhist context. | Halal certification mandatory for many F&B products under Law 33/2014. Sharia banking developed framework via OJK. Mostly Muslim context. | Indonesian halal certification is mandatory by statute; Thai halal is voluntary but commercially essential for Muslim-export markets. |
| Property / Land Ownership | Foreigners cannot own land. Condominium Act 49% foreign quota. | Foreigners cannot own freehold land. HGB (right to build) and Hak Pakai (right to use) for foreigners with KITAS / KITAP residency. Apartment ownership limited. | Both prohibit foreign freehold; Indonesia offers HGB / Hak Pakai mechanisms for residents; Thailand uses condo quota + long lease. |
| Drug Laws | Cannabis decriminalised 2022 but recreational use restricted since 2024. Death penalty possible for trafficking. | Law 35/2009. Death penalty for trafficking. Cannabis fully illegal (Class I). Extensive death-row population of foreign traffickers. | Both impose death penalty for trafficking; Indonesia executes drug-trafficking sentences more actively. Cannabis remains fully illegal in Indonesia. |
| Defamation | Criminal offence under Criminal Code §326-333 + Computer Crime Act §14(1) for online. | ITE Law (UU 11/2008, revised 2016 & 2024) for online defamation — heavily used. Penal Code articles also apply. | Both have aggressive online-defamation regimes; Indonesian ITE Law has drawn major free-speech criticism comparable to Thai CCA §14(1). |
| Tax System | Worldwide remittance basis from 2024. Tax-resident at 180+ days. Top personal rate 35%. | Worldwide taxation for tax-residents (183+ days or domicile). Top personal rate 35%. Indonesia-Thailand DTA in force. | Both apply worldwide taxation for residents; the DTA prevents double taxation on most income types. |
| Family Law | Community property default. Civil marriage at amphur. Same-sex marriage from 22 Jan 2025. | Religious marriage required (Law 1/1974). No civil marriage. Different marriage rules by religion. Same-sex marriage not recognised. | Indonesia requires religious marriage; Thailand offers civil marriage including same-sex unions since 2025. |
Important Notes
Indonesia and Thailand are both ASEAN members — services-sector liberalisation under the ASEAN Economic Community framework applies.
Indonesian halal-certification is mandatory by law — Thai F&B exporters to Indonesia must obtain Indonesian halal recognition (BPJPH).
ITE Law (UU 11/2008) and Thai Computer Crime Act §14 are functional parallels — both impose substantial online-speech criminal liability.
Indonesia-Thailand DTA (signed 2001) covers individual and corporate income tax + capital gains.
Professional Legal Assistance
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