Introduction
Foreign Direct Investment (FDI) enterprises play an important role in Vietnam’s economy. However, their operations are often more complex than domestic businesses, leading to stricter requirements in tax declaration. Understanding the specific regulations will help FDI companies stay compliant and avoid unnecessary risks.
1. Registration for Tax Identification Numbers
FDI enterprises must register for a tax identification number (TIN) within 10 working days from the issuance of their business license. Without a TIN, the company cannot perform tax declaration, pay taxes, or conduct financial transactions legally.

2. VAT Tax Declaration
- FDI companies must register their VAT method: deduction method or direct method, depending on revenue and legal requirements.
- VAT tax declaration is typically done on a monthly or quarterly basis, depending on revenue size.
- Export activities may qualify for 0% VAT, but enterprises must submit full supporting documents.
3. Corporate Income Tax (CIT) Obligations
- FDI enterprises must submit CIT tax declaration annually, based on profit after deducting expenses
- Tax incentives may apply for businesses in industrial zones, high-tech parks, or priority sectors.
- Any errors in expense reports can directly affect CIT tax declaration and result in penalties.

4. Personal Income Tax (PIT) for Foreign Employees
- FDI companies must handle PIT tax declaration on behalf of foreign experts and employees.
- Tax residency status must be determined (resident vs. non-resident) to apply the correct tax rate.
- Annual PIT finalization is compulsory for both the company and the foreign employees.
5. Reporting and Compliance Requirements
- FDI enterprises must prepare transfer pricing reports to prove transactions with related parties are fair and comply with market principles.
- Annual audit reports must be submitted together with tax declaration documents.
- Inconsistent reporting can trigger tax inspections or audits.
Conclusion
Tax declaration for FDI enterprises requires strict compliance with Vietnamese tax laws and international standards. From VAT, CIT to PIT, every step must be accurate and transparent. To minimize risks, FDI businesses should invest in professional accounting systems or outsource to trusted tax service providers.

