Vietnam Tax Compliance: 7 Mistakes Foreign-Invested Companies Make

Vietnam tax compliance mistakes can arise even when foreign-invested companies submit every return on time. Gaps in transfer pricing documentation, tax incentive eligibility, expatriate payroll and cross-border payments can leave businesses exposed. This guide examines seven common mistakes and the practical controls management should review.

Common Vietnam Tax Compliance Mistakes and Their Business Impact

A business does not build compliance merely by maintaining standard ledger entries. The table below outlines the primary areas of exposure and their direct business impacts:

Risk Area	Common Compliance Mistake	Business & Operational Impact	Priority Control
Transfer Pricing (TP)	Treating related-party fees as routine bookkeeping without benefit/pricing proof.	Arbitrary tax adjustments, 30% EBITDA interest caps, late-payment penalties.	Annual transaction mapping, benefit documentation, and local benchmarking files.
CIT Incentives	Extending tax holidays/reduced rates from original projects to unapproved expansions.	Retroactive tax clawback, accumulated statutory interest, forfeited tax status.	Rigorous segregation of incentivized vs. non-incentivized revenue and expenses.
Expatriate PIT	Failing to report offshore salary, global benefits, or miscalculating tax residency.	Double employer/employee tax liability, reputational exposure, back-withholding.	Integrated cross-border payroll audits and global mobility day-tracking.
Foreign Contractor Tax (FCT)	Remitting cross-border payments (software, royalties, ads) without assessing withholding.	Unforeseen gross-up costs, withholding arrears, and administrative penalties.	Pre-payment contract classification and tax-clause allocation.
VAT Recovery	Relying on invalid supplier records, missing non-cash proofs ( VND 5M), or flawed categorization.	Frozen working capital, denied refunds, or protracted pre-refund audits.	Pre-filing reconciliations between customs, bank slips, and e-invoices.
Capital & Loans	Failing to register foreign debt or extensions with the State Bank of Vietnam (SBV).	Inability to remit outbound principal/interest, non-deductible finance costs, FX fines.	Unified equity and debt compliance monitoring schedule.
Tax Audit Preparedness	Waiting for an inspection notice to reconcile inter-departmental data mismatches.	Compressed remediation timelines, maximum reassessments, high dispute costs.	Periodic internal tax health checks and pro-active data reconciliation.

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Deep-Dives: The Mechanics Behind the Mistakes

1. Transfer Pricing: Bookkeeping Without Economic Substance

Purchases from parent companies, group management service fees, shared IT costs, and shareholder financing are standard inside multinational groups. The fatal mistake is recording the expense without compiling evidence proving what was performed, why the Vietnamese entity needed it, and whether the markup matches market rates.

Reporting a net taxable profit does not insulate a company from TP reassessments. Under Decree No. 255/2026/ND-CP (effective 1 July 2026, replacing Decree 132/2020/ND-CP), tax authorities apply strict risk-based data hierarchies and scrutinize related-party transactions. An exemption from compiling a local transfer pricing dossier does not exempt an enterprise from submitting mandatory related-party transaction disclosure forms at year-end.

2. Corporate Income Tax: Extending Project Incentives Illegally

Preferential CIT rates (such as 10% or 15%) and multi-year tax holidays significantly boost project yields. However, incentives attach strictly to qualifying investment projects and locations—not to the corporate legal entity.

When businesses invest in expansion phases, new production lines, or diversified service activities, they cannot assume original incentives roll over automatically. Under the governing framework (Law No. 67/2025/QH15, Decree No. 320/2025/ND-CP, and Circular No. 20/2026/TT-BTC), expansion projects must meet distinct statutory investment thresholds to claim separate incentives. Furthermore, accounting systems must strictly segregate income and expenses between eligible and ineligible streams; otherwise, authorities may revoke the incentives entirely.

Operational Insight: Tax exposure frequently manifests when contracts, ledgers, and e-invoices tell conflicting stories. Reviewing filing positions prior to capital expansions or corporate restructuring prevents costly post-audit corrections. Ascentium Vietnam’s tax and compliance practice routinely assists foreign investors in identifying these exposures early.

3. Expatriate Payroll: Partial Local Visibility

Exposure in expatriate personal income tax (PIT) typically occurs when local HR only handles the domestic payroll portion. Offshore salaries, group equity plans, relocation allowances, school tuition, and home leave paid directly by the global parent remain subject to Vietnamese tax jurisdiction if the individual is a Vietnamese tax resident.

Under the amended PIT Law No. 109/2025/QH15, Decree No. 253/2026/ND-CP, and Circular No. 87/2026/TT-BTC (effective 1 July 2026), international physical presence rules (the 183-day test) and non-cash benefit caps (such as employer-provided housing rules) are enforced with enhanced digital tracking. Cross-border employees must be assessed against integrated group-wide compensation ledgers.

4. Foreign Contractor Tax: Unreviewed Cross-Border Remittances

When an enterprise purchases software licenses, offshore digital marketing, technical consulting, or equipment installations from foreign vendors, Vietnamese Foreign Contractor Tax (comprising VAT and CIT) is frequently triggered. With Circular No. 89/2026/TT-BTC having formally replaced Circular 103/2014/TT-BTC on 1 July 2026, withholding and tax registration procedures operate under updated administrative mandates. If an agreement does not specify whether pricing is gross or net of Vietnamese withholding, the local buyer risks bearing the unexpected tax bill itself, along with non-deductibility challenges if statutory withholding obligations were ignored

What Changed in 2026?

Two procedural shifts introduced in 2026 directly change how enterprises manage ongoing compliance:

• The VND 5 Million Cash-Payment Threshold: The traditional VND 20 million cash ceiling for VAT deductions and CIT expense deductibility has been superseded. Under Decree No. 181/2025/ND-CP (as amended by Decree No. 144/2026/ND-CP), purchases of VND 5 million or more must be settled via legitimate non-cash banking channels to safeguard input VAT credits and CIT deductibility. Direct cash deposits by buyers into seller bank accounts are explicitly non-compliant.

Foreign Loan Lifecycle Controls: Under Circular No. 12/2022/TT-NHNN as amended by Circular No. 80/2025/TT-NHNN (effective 25 January 2026), foreign borrowing frameworks apply tighter account-use controls and registration procedures. Short-term shareholder or third-party loans rolled over past the one-year mark trigger mandatory SBV registration; unregistered loans prevent commercial banks from processing outbound debt service and principal repayments.

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Practical Friction Points That Delay Filings and Trigger Audits

In real-world inspections, assessments are rarely triggered by bad faith. They stem from operational disconnects:

Delayed Response to Clarification Notices: Failing to reply within specified administrative timeframes, which often escalates a standard desk inquiry into an on-site audit.s.

Contract and Invoice Inconsistencies: Discrepancies in party names, scope descriptions, and commercial terms between commercial agreements, customs documents, and e-invoices.

Missing Commercial Delivery Evidence: Paying overseas intercompany management charges without maintaining supporting logs, emails, deliverables, or timesheets.

Failure to Document Settlement Offsets: Using triangular payments, debt novation, or tripartite set-offs without explicit contractual authorization and clearing documentation.

Unmonitored Loan Maturities: Converting a 360-day shareholder loan into a medium-term facility without completing SBV registration before the initial maturity date.

How to Avoid Vietnam Tax Compliance Mistakes

Finance and compliance leaders should execute a structured five-step internal review:

Reconcile Cross-System Data Quarterly: Run internal reconciliation runs pairing e-invoices, customs declarations, accounting ledgers, and bank statements before annual filing deadlines.

Map Related-Party Flows: Audit intercompany agreements against actual commercial delivery and assemble transfer pricing defense files concurrently with CIT filings.

Isolate Incentive Entitlements: Audit project licenses against operational assets to ensure non-qualifying secondary production lines are not commingled with incentivized revenue.

Harmonize Cross-Border Payroll: Conduct a cross-border salary reconciliation covering base pay, allowances, and offshore bonuses for every foreign national working in Vietnam.

Enforce Non-Cash Banking Protocols: Implement a strict enterprise payment policy blocking cash settlements for any transaction at or above VND 5 million.

Conclusion

Vietnam’s General Department of Taxation continues rolling out real-time analytical tools powered by big data and automated transaction matching. Tax filings are no longer evaluated in isolation; they are continuously cross-referenced against your suppliers’ disclosures, your buyers’ filings, customs records, and commercial banking flows.

For foreign enterprises operating in Vietnam, the priority is no longer just submitting returns on time. It is ensuring that your contracts, physical delivery logs, banking trails, and statutory filings tell an identical, legally defensible story from day one.

Strengthen your tax readiness before an inspection arrives. Our experts can help review your documentation, reconcile records and address compliance gaps. Speak to Our Tax Experts