1. Context and Strategic Significance for SMEs
1.1. The Shift Toward Transparency and Data Governance
The current regulatory landscape marks a highly significant period for Small and Medium-sized Enterprises (SMEs) operating in Vietnam. The overarching objective of the prevailing legislative reforms is to aggressively tighten regulations concerning accounting practices, Corporate Income Tax (CIT) declarations, and the administration of tax incentives. These legislative adjustments are fundamentally directed toward standardizing corporate documentation, enforcing stringent transparency requirements, and substantially improving data governance across the private sector.
1.2. Balancing Compliance Challenges with Optimization Opportunities
For SMEs, this modernized framework presents a dual-faceted scenario. On one hand, it imposes a considerable challenge regarding the allocation of compliance resources, requiring immediate upgrades to internal procedures and accounting software. On the other hand, it offers a distinct, structured opportunity to standardize statutory books of accounts, optimize legitimate tax costs, and systematically reduce the risk of administrative tax reassessments or financial penalties during state audits. Adherence to these updated regulations is no longer optional but a critical component of corporate risk management.
2. Circular 99/2025: The New Accounting Regime Applicable to All Businesses
2.1. Core Objectives of the Accounting System Changes
The promulgation of Circular 99/2025 introduces a newly standardized accounting regime applicable across various enterprise types. The primary statutory objectives of these accounting system modifications include:
- Standardizing the criteria for revenue and expense recognition to align more closely with international financial reporting principles.
- Improving the precise data reconciliation mechanisms between internal accounting ledgers and statutory tax declaration systems.
- Enhancing the overarching quality, accuracy, and reliability of financial reports submitted for internal management, external audit, and state inspection purposes.
2.2. Chart of Accounts and Data Mapping Protocols
A critical area requiring immediate review by SMEs is the chart of accounts and the associated data mapping architecture. Enterprises are legally required to conduct a comprehensive review of their existing chart of accounts, evaluating the specific methodologies utilized for recording commercial revenue, calculating the cost of goods sold (COGS), allocating prepaid expenses, and applying depreciation schedules for fixed assets. To ensure compliance, SMEs must establish a definitive conversion “map” that accurately transitions historical financial data from the preceding system to the newly mandated framework under Circular 99/2025.
2.3. Enhancing Financial Statements and Explanatory Notes
Under the updated regime, the preparation of financial statements demands a significantly higher degree of granularity. SMEs are required to utilize more detailed reporting templates and provide exhaustive explanatory notes. Regulatory scrutiny will heavily focus on the disclosure of accounts receivable, accounts payable, intercompany balances within corporate groups, and the precise valuation of work-in-progress (WIP) costs. Failure to provide adequate notes validating these balances may result in the rejection of the financial statements by auditing bodies or tax authorities.
3. Accounting Software Systems and Internal Workflow Standardization
3.1. Standardizing Document Workflow Processes
The integrity of accounting data relies entirely on the underlying source documentation. The new regulatory environment requires SMEs to standardize their document workflow processes comprehensively. This encompasses the strict alignment of commercial contracts, formal acceptance reports (bien ban nghiem thu), financial invoices, and valid payment documents. Furthermore, enterprises must strengthen internal controls to assess the “eligibility” and deductibility of expenses at the point of origination, rather than attempting to reconcile unverified expenses at the end of the fiscal period.
3.2. Software System Capabilities and Regulatory Compliance
SMEs must conduct an immediate technical audit of their existing accounting software capabilities. The system must natively support the updated chart of accounts and generate report templates in the exact format prescribed by Circular 99/2025. Additionally, the software must feature robust internal controls, including strict user permission hierarchies and unalterable system logs (audit trails) that track every data entry or modification. The system must also possess the capability to export raw financial data seamlessly when formally requested by tax regulatory authorities during an inspection.
3.3. Practical Implementation Tips for Accounting Transitions
To facilitate a rapid and compliant transition, SMEs should execute a structured “mini gap analysis” over a one- to two-week period, directly comparing current internal processes against the new statutory requirements. Following this, management must finalize and formally issue internal policies governing asset depreciation, cost allocation, contract-based revenue recognition, and financial provisions. Where technically feasible, enterprises should run a parallel accounting period—operating both the old and new systems simultaneously—to detect and rectify data discrepancies before the official reporting deadline.
4. Decree 320/2025: Key Updates in Corporate Income Tax (CIT) Guidelines
4.4. Structural Overhaul of CIT Regulations
Corporate Income Tax implementation has been significantly restructured. Circular No. 20/2026/TT-BTC, issued by the Minister of Finance, provides detailed guidelines for the Law on Corporate Income Tax and Decree No. 320/2025/ND-CP. This regulatory instrument replaces preceding circulars in their entirety, establishing a new baseline for CIT compliance that directly impacts how SMEs calculate taxable income.
4.2. Deductible Expenses and Strict Substantiation
CIT compliance typically poses challenges for SMEs concerning the validity of expenses, the timing of recognition, and the adequacy of supporting documentation. Under Decree 320/2025, expenses lacking comprehensive documentation—specifically, executed contracts, formal acceptance reports, or proper non-cash payment evidence—constitute a high-risk category for tax disallowance. Furthermore, expenses allocated for outsourced services (such as marketing, management consulting, sales commissions, and logistics) are subject to intense scrutiny. SMEs must maintain dossiers that clearly describe the precise nature of the services rendered and provide empirical evidence demonstrating the economic effectiveness or direct outputs of such services.
4.3. Minimum Checklist to Mitigate CIT Risks
To systematically mitigate CIT disallowance risks, SMEs must enforce a minimum compliance checklist for every significant operational expense. This checklist dictates that every transaction must be supported by an executed contract, verifiable output documentation, a legal invoice, proof of lawful payment, and a documented internal approval workflow. Furthermore, enterprises must formally standardize and publish internal “rule books” or financial policies regarding travel expenses, business entertainment, marketing outlays, and outsourced contractor fees. Conducting scheduled quarterly reviews of high-risk expense categories and adjusting CIT provisions accordingly is highly recommended.
5. Transfer Pricing, Related-Party Transactions, and Revenue Recognition
5.1. Compliance in Related-Party Transactions
For SMEs operating within a group structure or engaging in transactions with affiliated companies, strict adherence to transfer pricing regulations is mandatory. When executing internal sales, loans, or service provisions with related parties, SMEs are legally obligated to prepare and maintain contemporaneous transfer pricing documentation. This documentation must conclusively demonstrate that the transaction prices comply strictly with the arm’s-length principle, ensuring that profits are not artificially shifted to minimize corporate income tax liabilities.
5.2. Revenue and the Timing of Taxable Income Recognition
A frequent area of tax penalization involves the mismatched timing of income recognition. SMEs must meticulously review their commercial contract terms and the corresponding dates on acceptance reports. The timing of revenue recognition for accounting purposes must be carefully reconciled with the timing of revenue recognition for CIT purposes, as defined by the tax code. Discrepancies between the issuance of an invoice, the transfer of risks and rewards to the buyer, and the recording of revenue in the ledger frequently lead to tax reassessments and late payment interest penalties.
6. Decree 20/2026: Comprehensive Tax Incentives for SMEs
6.1. The Statutory Basis for SME Incentives
The government has introduced substantial fiscal support mechanisms to stimulate private economic development, formalized through Resolution 198/2025/QH15 and guided by the subsequent Decree 20/2026/ND-CP. This legislative package redefines the tax incentive landscape for SMEs, offering profound financial relief but demanding strict adherence to eligibility criteria.
6.2. Three-Year Corporate Income Tax Exemption
The most impactful provision under Decree 20/2026/ND-CP is the establishment of a three-year Corporate Income Tax exemption specifically targeted at newly established small and medium-sized enterprises. This exemption period commences from the exact date the enterprise is granted its initial business registration certificate. However, the statute explicitly outlines that these preferential tax provisions do not apply uniformly; certain business subjects and specific sectors are expressly excluded from claiming this exemption, necessitating a careful legal review of the company’s registered business lines.
6.3. Abolition of Fees and Reform of Household Businesses
In a move to lower operational barriers, the newly enacted regulations mandate the complete abolition of business license fees (subject fees) applicable from the beginning of the fiscal period. Additionally, a critical reform targets the informal sector: business households and individual business owners are no longer permitted to apply the lump-sum (fixed) tax method. This statutory change forces these entities to adopt standardized accounting practices and transition toward formalized corporate structures to maintain legal compliance.
7. Maintaining SME Status and Navigating Compliance Pitfalls
7.1. Criteria for Identifying and Maintaining SME Status
Tax incentives for SMEs extend far beyond simple tax rates; they are fundamentally contingent upon meeting specific SME eligibility criteria, satisfying industry or location requirements, and maintaining the continuity of these criteria throughout the fiscal year. SMEs are classified based on statutory thresholds regarding annual revenue, the size of the workforce, or total capital. Businesses must establish a rigorous internal mechanism to track these specific criteria annually to avoid critical compliance failures where they meet the criteria at the beginning of the year but inadvertently exceed the thresholds and fail to meet them by year-end.
7.2. Documentation, Procedural Requirements, and Exclusion Criteria
Claiming incentives requires proactive administrative compliance. SMEs may be subject to specific documentation and procedural requirements, including the submission of formal notifications, specialized tax declarations, and the mandatory retention of supporting documents to verify ongoing eligibility. Furthermore, any changes in the corporate structure, such as mergers, acquisitions, or shifts in ultimate ownership, can trigger a reassessment and potential loss of SME status. Certain cases may be entirely excluded from incentives, particularly if the enterprise commits statutory violations related to invoice fraud, incorrect tax declarations, or operates within restricted industries.
7.3. A Practical Approach to Securing Incentives
To securely lock in tax incentives, enterprises should proactively create an “SME Eligibility File.” This centralized dossier must contain all data proving the criteria, relevant financial reports, and internal board decisions. Management should design a standard operating procedure for periodic reviews (e.g., every six months) of these eligibility criteria and maintenance conditions. Crucially, when special corporate situations arise—such as rapid operational expansion, M&A activities, or the relocation of manufacturing facilities—the enterprise must comprehensively reassess its tax incentive eligibility before finalizing the strategic plan.
8. The 30-Day Strategic Roadmap for Compliance Preparation
8.1. Identifying Common Compliance Pitfalls
Before implementing procedural changes, SMEs must recognize the most common compliance pitfalls that attract regulatory penalties. These include:
- Lack of documentation proving services: Instances where financial invoices exist, but underlying contracts, acceptance reports, or empirical output descriptions are absent.
- Non-compliant payments: Situations where expenses are subject to specific non-cash payment terms under the law, but the business fails to comply.
- Mismatched recognition timing: Revenue or expense recognition in the ledgers does not accurately align with formal acceptance, physical delivery, or specific contractual terms.
- Lack of invoice risk management: Sourcing goods or services through multiple unverified intermediaries, engaging with high-risk suppliers, or lacking concrete evidence of actual commercial transactions.
- Failure to conduct regular reconciliations: Waiting until the absolute end of the fiscal year to make tax-accounting adjustments, leading to insurmountable errors and administrative overload.
- Lack of role-based controls: Operating an accounting system where a single individual holds the permissions to create documents, approve them, and post the final journal entries, entirely violating segregation of duties.
8.2. Execution of the 30-Day Roadmap
To systematically prepare for these stringent regulatory requirements, SMEs are advised to adopt the following 30-day implementation roadmap:
- Week 1: Process and Vulnerability Review. The finance department must comprehensively review existing accounting processes, map the current chart of accounts against Circular 99/2025, and identify all critical weaknesses in expense substantiation and documentation.
- Week 2: Standardization of Templates. The enterprise must formally standardize all commercial contract templates, formalize acceptance procedures, enforce non-cash payment processes, and publish binding internal expense policies.
- Week 3: Risk Categorization and Trial Reconciliation. Management must establish a detailed CIT checklist segmented by high-risk expense categories. Concurrently, the accounting team should conduct a trial run of the accounting-to-tax data reconciliation process to identify systemic friction points.
- Week 4: Incentive Protection and Governance. The enterprise must formally assess its eligibility for SME tax incentives under Decree 20/2026/ND-CP, compile the definitive “SME Eligibility File,” assign strict oversight responsibilities to key personnel, and establish an unalterable schedule for regular internal compliance reviews.
9. Conclusion
The comprehensive overhaul of Vietnam’s tax and accounting frameworks marks a pivotal shift for SMEs, elevating statutory compliance from a routine administrative duty to a core strategic imperative. While adapting to the stringent data governance, strict expense substantiation, and modernized reporting standards presents initial operational challenges, it simultaneously offers a distinct opportunity to optimize financial health and secure vital tax incentives. By proactively executing a structured transition plan, business leaders can effectively mitigate audit risks, ensure internal transparency, and transform regulatory adherence into a strong foundation for sustainable, long-term growth.
This article is for informational purposes only and does not replace professional legal advice. For support tailored to your situation, please contact a lawyer or legal professional.
HARLEY MILLER LAW FIRM
- Email: [email protected]
- Web: hmlf.vn
- Hotline: +84937215585