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Against the backdrop of Vietnam’s continuously evolving tax system, businesses have various opportunities to structure their operations and make use of lawful tax policies to control costs. A legal tax cost optimization strategy for businesses in Vietnam is not about avoiding tax obligations, but about organizing business activities, expenses, and tax documentation in accordance with available incentives and applicable laws.
Tax Legal Framework Businesses Need to Keep Updated
In 2026, businesses should pay particular attention to the Law on Corporate Income Tax No. 67/2025/QH15, which took effect on October 1, 2025, together with Decree No. 320/2025/ND-CP and Circular No. 20/2026/TT-BTC guiding its implementation.
With respect to value-added tax, the Law on Value-Added Tax No. 48/2024/QH15 took effect on July 1, 2025 and was subsequently amended by Law No. 149/2025/QH15, which took effect on January 1, 2026.
In addition, the Law on Tax Administration No. 108/2025/QH15 took effect on July 1, 2026, making it increasingly important for businesses to maintain close control over tax records, tax declarations, tax payments, and tax compliance obligations.
Taking Advantage of Tax Incentives from the Business Planning Stage
One of the strategies for legally optimizing tax costs for businesses in Vietnam is to determine eligibility for tax incentives at the project planning stage, rather than considering them only after business operations have commenced.
Depending on the sector, location, and scale of a project, businesses may consider tax incentive policies provided by law. Therefore, the selection of an offshore investment location, business sector, project scale, and project structure may directly affect the overall tax costs over many years.
Businesses should assess the conditions for tax incentives and the timing from which such incentives may be applied before making investment decisions. This is a lawful approach that can help businesses reduce tax costs without adopting measures that create compliance risks.
Controlling Deductible Expenses and Supporting Documentation
An expense incurred in the course of business does not automatically qualify as a deductible expense when determining taxable income. Businesses need to consider the actual nature of the expense, its business purpose, supporting documentation, and applicable invoice and documentary requirements for each expense.
Accordingly, optimizing tax obligations within Vietnam’s legal framework should begin with establishing an accurate system for managing expenses and supporting documentation. Regularly reviewing contracts, invoices, payments, and internal records can help businesses avoid situations where an expense is commercially reasonable but does not fully satisfy the applicable tax requirements.
This is also an effective tax management strategy for businesses, as sustainable tax cost reduction must be accompanied by the ability to substantiate and defend the relevant documentation when the tax authorities conduct an inspection.
Businesses seeking to legally optimize tax costs in Vietnam should consider contacting ASL LAW for professional retainer service and legal support for enterprises looking to own in-house lawyer, including advice on What is Fees and Procedure of company formation in Vietnam and What is advantage of opening representative office in Vietnam tailored to their specific business and tax circumstances.
Optimizing Value-Added Tax and Cash Flow
Value-added tax has a direct impact on a business’s cash flow, particularly for businesses engaged in the purchase and sale of goods, import and export activities, or significant asset investments.
Businesses need to control the timing of invoice issuance, the conditions for input VAT deduction, and the documentation relating to each transaction. Effective management of these factors can help minimize the risk of input VAT becoming non-deductible or cash flow being adversely affected by procedural errors.
Therefore, lawful tax cost-saving solutions in Vietnam are not limited to the amount of tax payable, but also involve reducing financial costs arising from errors, processing delays, or the failure to make use of deduction rights available under applicable regulations.
Managing Related-Party Transactions and Tax Risks
For businesses conducting transactions with related parties, establishing appropriate pricing policies and transaction documentation is an important aspect of tax governance.
Businesses should analyze the nature of the transaction, its economic value, and supporting documentation rather than focusing solely on reducing the amount of tax payable. A structure lacking an adequate basis may result in a risk of adjustment during a tax inspection.
Therefore, a legal tax cost optimization strategy for businesses in Vietnam should pursue overall optimization, including both compliance costs and tax dispute risks.
Building a Proactive Tax Management System
Businesses should move from an approach focused on “filing tax returns on time” toward proactive tax management. An appropriate system may focus on:
- Periodically reviewing expenses and the conditions for tax deductibility.
- Updating changes in tax laws and tax incentive policies.
- Reviewing contracts, invoices, and supporting documentation before tax finalization.
- Assessing risks associated with related-party and cross-border transactions.
- Maintaining sufficient documentation to provide explanations during tax inspections or audits.
This approach enables businesses to optimize their tax obligations within Vietnam’s legal framework in a systematic manner rather than addressing issues only after they arise.
Tax Optimization Must Go Hand in Hand with Risk Management
The ultimate objective of a legal tax cost optimization strategy for businesses in Vietnam is not to reduce taxes at all costs, but to achieve a level of tax liability that complies with the law while limiting costs and potential risks.
A tax arrangement may generate short-term savings but become a significant risk if it lacks a legal basis or sufficient supporting documentation. Conversely, proactively structuring business activities, taking advantage of available incentives, controlling expenses, and maintaining complete documentation can create more sustainable benefits.
Therefore, balancing legal opportunities and challenges in energy offshore investment is not the objective of tax planning; for businesses, the focus should be on balancing financial efficiency, tax obligations, and compliance risks. An effective tax management strategy for businesses should be developed from the business planning stage and continuously updated throughout the course of operations.
FAQ
1. How can businesses legally reduce their tax costs?
Businesses can take advantage of available tax incentive policies, effectively manage deductible expenses and value-added tax, and structure transactions in accordance with applicable laws.
2. Is tax optimization the same as tax avoidance?
No. Lawful tax optimization involves making use of rights, incentives, and mechanisms permitted by law, whereas tax avoidance or tax fraud may give rise to legal and financial risks.
3. Why is supporting documentation important for tax optimization?
Supporting documentation provides the basis for businesses to demonstrate the validity of expenses, deduction rights, and transactions during tax finalization or when the tax authorities conduct an inspection.
4. What should businesses with related-party transactions pay particular attention to?
Businesses should review the nature of transactions, applicable conditions, pricing policies, and supporting documentation in accordance with regulations governing tax administration for related-party transactions.
5. When should a business review its tax strategy?
A business should review its tax strategy when planning an offshore investment or changing its business model, and should also conduct periodic reviews when tax laws, business operations, or transaction structures change.
ASL Law is a leading full-service and independent Vietnamese law firm made up of experienced and talented lawyers. ASL Law is ranked as the top tier Law Firm in Vietnam by Legal500, Asia Law, WTR, and Asia Business Law Journal. Based in both Hanoi and Ho Chi Minh City in Vietnam, the firm’s main purpose is to provide the most practical, efficient and lawful advice to its domestic and international clients. If we can be of assistance, please email to [email protected].
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