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Step-by-step regulatory requirements organized by timeline phase
Register for Tax ID & VAT
Register for Tax ID with Revenue Department. VAT registration mandatory if annual revenue exceeds THB 1.8 million.
Open Corporate Bank Account
Open a Thai business bank account. Requires company registration documents and director identification.
Obtain Non-Immigrant B Visa
Foreign workers must obtain a Non-Immigrant B visa before applying for work permit.
Factory License (Ror Ngor 4)
Required for manufacturing operations with 50+ HP machinery or 50+ workers. Apply to DIW.
Register with Social Security Office
Register as employer within 30 days of hiring first employee. 5% employer + 5% employee contribution.
Obtain Work Permit for Foreign Staff
Apply for work permit before foreign employee starts work. Tied to the employer and specific position.
Obtain Sector-Specific Licenses
Additional licenses needed for restaurants (FDA), hotels (DPT), education, healthcare, etc.
Register Work Rules (10+ Employees)
Companies with 10+ employees must establish written work rules in Thai and register with DLPW.
Monthly Withholding Tax Filings
File PND 1 (salary), PND 3 (individual), PND 53 (corporate) withholding tax returns monthly.
Monthly Social Security Contributions
Remit employer and employee SSO contributions by 15th of following month.
Annual Corporate Tax Return (PND 50)
File annual corporate income tax return within 150 days of fiscal year-end. 20% CIT rate.
Half-Year Corporate Tax Return (PND 51)
File mid-year estimated corporate tax return within 2 months of the first 6 months of fiscal year.
Annual Audit & Financial Statements
All limited companies must prepare audited financial statements and file with DBD and Revenue Department.
Annual Work Permit Renewal
Renew work permits for foreign staff before expiry. Must maintain 4:1 Thai-to-foreign employee ratio.