Adherence to the arm's length principle is crucial for businesses to manage tax risks in the context of 2026, when the Tax Authority shifts to analyzing the economic nature of transactions rather than simply reviewing documents. This article clarifies audit "hot spots," the consequences of deviations from the arm's length principle, and provides guidance on comprehensive compliance strategies to help businesses protect their tax obligations and achieve sustainable growth.
The "Collusion" Trap and Inspection Pressure in 2026
The state of tax administration in 2026 reveals a clear and decisive trend: Tax authorities are tightening thematic audits of businesses with transactions involving closely related parties. In particular, businesses with prolonged losses, thin profit margins, or those making payments to related parties abroad are always the primary targets of these audits.
The core problem many businesses face is a superficial approach to documentation. Many still believe that simply having a complete set of Transfer Pricing Documentation with financial indicators within a theoretically safe range is sufficient to fulfill their obligations. However, they often overlook a golden rule: the transaction value must accurately reflect the actual contribution to the value chain and correspond to the value created from the nature of the production and business activities.
Based on the strict regulations in this Decree, the tax authorities manage, inspect, and audit the transfer pricing of taxpayers who comply with the arm's length principle. The tax authorities have the full right to reject related-party transactions that do not comply with the arm's length principle if these transactions reduce the enterprise's tax obligations to the State budget. This is the biggest trap that unprepared businesses often fall into. Once a transaction is deemed to lack economic substance, all efforts to formally comply with the arm's length principle will be completely rejected.
When the fundamental nature of independent trading is overlooked and the consequences of failing to adhere to the principles of independent trading are discussed.
If a business cannot demonstrate the accuracy and honesty of its compliance with the arm's length principle, the financial and legal consequences are extremely severe. The tax authorities will adjust the related-party transaction prices to determine the correct tax obligations according to regulations, ensuring there is no loss of revenue from transfer pricing practices.
Risks of price manipulation and direct tax imposition.
When authorities conduct audits, if they discover that related-party transaction prices deviate from market prices or do not accurately reflect the nature of the transaction, they will adjust the financial indicators. Being assessed for taxes based on internal tax data often results in significantly higher tax liabilities than initially anticipated by the business. This is accompanied by administrative penalties and late payment fees, which can cripple cash flow and severely impact long-term business plans.
Loss of credibility and risks in the tax administration system.
In 2026, the tax authorities' automated risk management system will classify businesses according to their level of compliance with the law. Failure to strictly adhere to the arm's length principle will result in businesses being placed on the High Risk list. This means businesses will be subject to more frequent audits in the following years, placing immense pressure on the Finance and Accounting departments and the management team.
A well-prepared file with polished figures will not protect a business if the transaction lacks genuine economic substance. It is the true nature of the operation and transaction that ultimately determines the taxpayer's corresponding tax obligations.
The strategy adheres to the principle of independent trading.
To protect businesses from rigorous audits, building a comprehensive independent audit strategy based on the principle of substance over form is the only viable solution for survival.
Understanding the principle that substance determines form
Adherence to the arm's length principle requires businesses to demonstrate the value created by the nature of their transactions and business operations. Tax authorities conduct audits based on this principle to determine corresponding tax obligations. This requires businesses to:
- Function, Asset, and Risk Analysis (FAR): Clearly identify which entity performs the primary function, utilizes which assets, and bears which risks. Profits should be allocated to those who make the most substantial contributions.
- Demonstrating economic benefits: For service transactions, businesses must answer the question: Does this service provide a specific benefit to business operations in Vietnam? If there is no affiliated party providing the service, will the business have to outsource or perform it itself?
Applying Value Chain Analysis provides businesses with a holistic view, ensuring that independent transaction compliance is not disrupted at any stage of the operational process.
If businesses encounter any difficulties or obstacles during the compliance process, they should consult with relevant authorities. related party transaction advisory services From reputable and experienced organizations like MAN – Master Accountant Network to receive advice and support from a team of experts.
The process adheres to the standard independent trading principles as stipulated in Decree 132/2020/ND-CP.
To ensure high authenticity and reliability, businesses should implement the following four-step standardization process:
Step 1: Review and accurately identify the relationships between the links.
In 2026, the criteria for related party relationships were closely monitored by the Tax Authority through digital data. Businesses needed to review all ownership relationships exceeding 25%, loans exceeding 50% equity, as well as more discreet control relationships. Accurately identifying the relevant parties is the first step towards independent transaction compliance.
See details: Forms of related party transactions
Step 2: Choose a pricing method that suits the nature of the transaction.
Choosing the wrong method is the leading cause of transfer pricing adjustments by the tax authorities. Businesses need to understand the five common methods as stipulated by regulations. Decree 132/2020/ND-CP.
- The Comparable Prices (CUP) method: Compares prices in linked transactions with prices in independent transactions. This method is excellent in terms of accuracy but it is difficult to find perfectly matching data.
- Resale Price Method: Based on the resale price of goods purchased from an affiliated party to an independent party. Suitable for trading and distribution businesses.
- Cost Plus Method: This method determines the price by adding the cost of goods sold to a predetermined gross profit margin. It is commonly used for contract manufacturing and production based on orders.
- Net Profit Margin Comparison (NPMR): This method compares the net profit margin of related-party transactions with the profit margin of comparable independent transactions. This is the most popular method in 2026 due to its high flexibility.
- Profit Split Method: This method divides the consolidated total profit of related parties based on their actual contributions. It is often applied to specific transactions or exclusive ownership of intangible assets.
Step 3: Establish the standard independent value range (Arm's length range
A key update to the 2026 tax roadmap is the tightening of the percentile range. Businesses complying with the arm's length principle must ensure their profit margins not only fall within the 35th to 75th percentile range, but must also explain why if these margins fall below the lower end of the safety margin.
Step 4: Complete and archive the three-tiered record system.
The record system is the highest legal evidence of compliance with independent transaction practices:
- Local File: Focuses on transactions originating in Vietnam.
- Master File: Provides a global overview of the corporation.
- CbCR: Country-by-Country Earnings Report for Large Corporations.
For those cases Exemption from filing related-party transaction records., Businesses must still provide complete information in the Appendix.
Important considerations for businesses
To ensure a smooth tax settlement process and minimize the risk of being assessed for taxes, businesses need to pay special attention to the following crucial factors:
- Controlling Interest Expense (EBITDA): Compliance with the arm's length principle always goes hand in hand with adhering to the 30% EBITDA interest expense limit. This is a point that the tax authorities frequently check to prevent profit shifting through financial expenses by artificially inflating internal borrowing interest rates.
- Contracts and Actual Documentation: Every transaction must have a formal contract, but more importantly, actual documentation (email exchanges, handover records, service logs) is crucial to prove that the transaction actually took place as per the contract. This strengthens the credibility of the transaction when the business demonstrates compliance with the arm's length principle to the inspection team.
See details: How to calculate interest costs according to Decree 132
Conclusion: Transparency for sustainable development
When the Tax Authority adjusts related-party transaction prices to determine the correct tax liability, they are aiming for a level playing field in the business environment where true value is respected.
Businesses need to proactively review and build a transparent tax management system starting today. Don't let small mistakes regarding the arm's length principle become obstacles to your future growth. Consider the investment in complying with the arm's length principle as smart insurance that helps protect your business's reputation.
If your business has questions about how to adjust transfer pricing or needs assistance with a review, contact MAN – Master Accountant Network for expert advice.
Contact information MAN – Master Accountant Network
- Address: No. 19A, Street 43, Tan Thuan Ward, Ho Chi Minh City
- Mobile/Zalo: 0903 963 163 – 0903 428 622
- Email: man@man.net.vn
Content is moderated by: Mr. Le Hoang Tuyen – Founder & CEO of Man, CPA Vietnam Auditor with over 30 years of experience in Accounting, Auditing and Financial Consulting..