5 “Costly” Tax Mistakes FDI Enterprises Make In Their First Year Of Operation

The first year is often considered a “golden period” for foreign-invested enterprises (FDIs) to establish their operational, financial, and governance foundations. However, as Vietnam has shifted toward a tax administration model based on self-assessment and post-audit review, this is also the stage where tax risks most commonly arise.

In practice, many tax exposures do not stem from intentional violations but from an incomplete understanding of local regulations and the failure to standardize systems from the outset. When tax authorities conduct inspections three to five years later, these early-stage mistakes can result in tax reassessments and penalties amounting to millions of dollars.

Below are five of the most common and costly mistakes.

1. Insufficient Charter Capital Contribution and the 30% EBITDA Interest Deduction Cap

In the first year, many FDIs have not fully contributed charter capital in accordance with the timeline stated in their Investment Registration Certificate (IRC), yet they rely on intercompany loans from their parent companies to finance operations.

Under Vietnamese regulations, if charter capital is not fully contributed on time, the portion of interest expense corresponding to the unpaid capital will not be deductible for Corporate Income Tax (CIT) purposes.

In addition, for enterprises with related-party transactions, net interest expenses are subject to a cap of 30% of EBITDA under Decree 132 on transfer pricing.

Because first-year operations often generate losses or very low profits, EBITDA is typically minimal. As a result, a significant portion of interest expenses may be disallowed. The consequence is a paradoxical situation in which a company reports accounting losses but still faces increased taxable income due to non-deductible expenses.

2. Underestimating Transfer Pricing Documentation Requirements

A common misconception is: “If we are making losses in the first year, transfer pricing will not be an issue.”

In reality, most FDIs engage in related-party transactions such as management fees, royalties, technical service fees, and intercompany loans. These transactions must comply with the arm’s length principle.

Vietnamese law requires enterprises to prepare and maintain transfer pricing documentation before the annual tax finalization deadline. If such documentation is not available, tax authorities have the right to adjust taxable income based on comparable companies and deemed profit margins.

In such cases, even if the enterprise is genuinely loss-making, the tax authority may impose a deemed profit margin and assess additional Corporate Income Tax.

3. Overlooking Foreign Contractor Tax (FCT)

During the initial investment phase, cross-border transactions are common, including software purchases, engagement of foreign experts, royalty payments, installation services, and consulting services from the parent company.

Many enterprises mistakenly assume that payments to overseas suppliers are not subject to Vietnamese tax. However, if services are consumed in Vietnam, they fall within the scope of Foreign Contractor Tax (comprising VAT and CIT components).

The Vietnamese entity is responsible for withholding and remitting FCT before transferring funds abroad. Failure to do so may result in the company having to pay the tax out of its own pocket, together with late payment interest and administrative penalties. In addition, the related expense may be disallowed for tax deduction purposes.

This is one of the most common first-year risks and directly affects cash flow.

4. Misunderstanding Corporate Income Tax Incentives

Vietnam maintains various tax incentive policies to attract FDI, particularly in high-tech industries, manufacturing, and projects located in socio-economically disadvantaged areas. However, tax incentives are not automatically granted to all foreign-invested enterprises.

Eligibility depends on several factors, including the investment sector, project location, and specific conditions stated in the investment license.

Moreover, the tax exemption and reduction period typically begins from the first year in which the enterprise generates taxable income, not merely from the first year of revenue. If the starting point or eligibility conditions are incorrectly determined, the enterprise may face retrospective tax reassessment for incentives that were improperly applied.

Notably, such issues are often discovered only during tax inspections years later.

5. Failure to Standardize Accounting Systems from the Outset

Differences between group accounting standards and Vietnamese accounting and tax regulations are a frequent source of risk.

Common issues include insufficient supporting documents for pre-operating expenses, improper allocation of incorporation costs, and revenue or expense recognition that does not align with Vietnamese regulations.

During a tax audit, these expenses may be disallowed in bulk, increasing taxable income and resulting in significant additional tax liabilities.

⚠️ The Biggest Risk: Complacency in the First Year

A common thread among these mistakes is that they originate in the first year of operation, when management attention is often focused on market entry and operational setup rather than tax structuring.

Under Vietnam’s post-audit tax administration regime, authorities may review tax compliance several years after filing. At that point, the financial impact includes not only additional tax but also late payment interest and administrative penalties.

For FDI enterprises, getting the tax structure right from day one is not merely a matter of compliance — it is a critical determinant of long-term financial stability.