Dear Clients and Partners,
As we cross the mid-way point of 2026, the landscape of Value Added Tax (VAT) in Vietnam has undergone a profound transformation. With the full implementation of the 2026 Tax Transparency Act and the finalized rollout of real-time e-invoicing under Decree 70/2025/ND-CP, the margin for error has narrowed significantly. For businesses operating in Vietnam: especially those with foreign capital: VAT compliance is no longer just an accounting task; it is a critical component of your corporate governance strategy.
At BLaw Vietnam, we have observed a surge in tax audits where small oversights in "VAT Proof" lead to massive financial adjustments. To help you navigate this complex environment, we have identified the seven most common mistakes businesses are making today and provided actionable solutions to fix them before your next audit.
1. Ignoring the New VND 5 Million Non-Cash Payment Threshold
For years, the "20 million VND rule" was the standard for non-cash payments to qualify for input VAT deduction. However, under the updated 2026 regulations, the threshold for mandatory bank transfers has been slashed to VND 5 million.
The Mistake: Your procurement team is still processing petty cash payments for office supplies or small services between VND 5 million and VND 20 million, assuming they are safe from scrutiny.
The Fix: Update your internal "Clockwork" SOPs immediately. Every invoice exceeding VND 5 million (inclusive of VAT) must be paid via a verifiable bank transfer from the company’s registered account. Our team often sees this as the #1 reason for rejected tax settlements.
2. Lags in Real-Time E-Invoice Transmission
In 2026, "real-time" means exactly that. The General Department of Taxation (GDT) now cross-references your sales data against your buyers' purchase data within seconds of a transaction.
The Mistake: Waiting until the end of the month or quarter to "sync" your e-invoice software with the GDT portal. Any delay can trigger an automated red flag in the GDT’s risk management system.
The Fix: Ensure your e-invoice solution is integrated directly with your ERP and is certified for Decree 70 compliance. Conduct weekly reconciliations between your internal books and the GDT portal data to ensure 100% alignment.
3. Misapplying the 10% VAT on Cross-Border Digital Services
As of July 2026, the tax authority has tightened the net on services supplied by foreign entities without a permanent establishment in Vietnam. The previous 5% rate for many digital platforms has been unified to a strict 10% VAT.
The Mistake: Continuing to pay foreign software-as-a-service (SaaS) or marketing vendors without withholding or accounting for the correct 10% VAT.
The Fix: Review all foreign contractor contracts. Ensure you are withholding the correct amount or that your vendor is registered to pay VAT directly in Vietnam. Failing to do this can lead to your input VAT being disallowed and potential penalties for failing to fulfill withholding obligations.
4. Poor Documentation for Exported Services (0% VAT)
The 0% VAT rate for exported services is one of the most powerful tools for tax optimization, but it is also the most heavily scrutinized during an audit.
The Mistake: Assuming a contract and an invoice are enough "proof" of export. In 2026, auditors are demanding secondary proof of service consumption outside of Vietnam.
The Fix: You must maintain a comprehensive "Defense File" for every 0% VAT claim, including:
- Signed contracts with foreign entities.
- Bank transfer receipts from abroad.
- Evidence that the service was consumed outside of Vietnam (e.g., project reports, logs, or delivery certificates).
Is your business ready for a 2026 Tax Health Check?
At BLaw Vietnam, we specialize in building "Clockwork" legal systems that prevent these mistakes before they happen. Contact us today to optimize your tax strategy.
5. Mismanaging the Temporary 2% VAT Reduction Expiry
While the 2% VAT reduction (dropping the rate from 10% to 8%) has been a welcome relief, it is currently scheduled to expire on December 31, 2026.
The Mistake: Issuing invoices in January 2027 at the old 8% rate for services rendered in December 2026, or vice-versa.
The Fix: Timing is everything. The VAT rate is determined by the time of invoice issuance (which should align with the completion of service or delivery of goods). Start planning your year-end invoicing cycle now to ensure every transaction reflects the correct rate applicable at that specific moment.
6. Neglecting Inconsistencies in EPE and Customs Data
For Export Processing Enterprises (EPEs), the integration between customs data and tax data is now seamless. If your customs declarations (Form HQ) do not perfectly match your VAT-exempt e-invoices, you are inviting an audit.
The Mistake: Recording raw material imports as "tax-free" but failing to account for waste or scrap sales in the domestic market with the appropriate VAT.
The Fix: Implement a dual-check system where your logistics/customs team and your accounting team verify every entry before submission. Any discrepancy should be reconciled monthly, not annually.
7. Relying on Manual Reconciliations Instead of a "Clockwork" System
The most significant mistake we see is the "Human Factor." In an era of high-speed digital reporting, manual spreadsheets are no longer sufficient to maintain VAT proof.
The Mistake: Using manual data entry to track VAT inputs and outputs, which leads to transcription errors, missing invoices, and late filings.
The Fix: Transition to a Clockwork Legal and Tax System. This involves:
- Standardizing Templates: Using pre-approved templates for all tax-related contracts.
- Automated Checklists: Forcing a digital sign-off on the "VAT Proof Checklist" (contracts, invoices, bank receipts) before any VAT return is filed.
- Senior Review: Having a dedicated compliance officer (or an external partner like BLaw Vietnam) perform a quarterly health check.
Conclusion: Take Action Before the Auditor Arrives
The 2026 tax environment in Vietnam rewards transparency and punishes negligence. Through the above article, it is clear that "VAT Proof" is no longer just about having an invoice: it is about the integrity of your entire data trail.
By fixing these seven mistakes, you can significantly reduce your risk profile and ensure your business remains a leader in compliance. However, staying updated with every nuance of the Vietnam tax optimization landscape can be overwhelming.
Are you ready to streamline your tax processes and secure your business?
At BLaw Vietnam, our knowledgeable attorneys and tax specialists are here to help you build a robust, error-free tax settlement system. Whether you are a foreign-invested enterprise or a growing domestic organization, we put your needs first.
[Contact BLaw Vietnam Today for a Comprehensive Tax Health Check]