Tax auditing is an independent, systematic evaluation process aimed at verifying the accuracy and completeness of records and documents related to tax obligations. In the context of increasingly stringent tax administration, especially after... Tax Administration Law 38/2019/QH14Tax audits not only help businesses comply with the law but are also a strategic tool for identifying risks, preventing errors, and strengthening credibility with tax authorities and stakeholders.
Many businesses still face legal risks due to a lack of tax knowledge, leading to common mistakes such as incorrectly determining deductible corporate income tax expenses or misdeclaring VAT. These errors can result in tax arrears, administrative penalties, and even criminal prosecution if the tax debt is substantial, according to Article 200 of the Penal Code. Proactively conducting or preparing for a tax audit demonstrates the experience and expertise of the accounting team, helping businesses prevent risks and strengthen their reputation with regulatory authorities.
Tax auditing: concepts and core roles in businesses.
As tax authorities tighten management and inspection, tax audits become a crucial tool for businesses to prevent risks and optimize their financial obligations. Beyond reviewing data, tax audits provide a comprehensive view of legal compliance, reporting transparency, and tax management efficiency. This allows businesses to strengthen their financial foundation, confidently implement production and business activities, and expand their plans for the future.
What is a tax audit? How is it different from a financial statement audit?
Tax auditing is the review of all economic transactions, accounting records, and legal documents with the sole purpose of assessing the level of compliance with tax laws and regulations. The ultimate goal is to determine the accurate tax obligations of the entity, including VAT, corporate income tax, personal income tax, excise tax, and other taxes. The result of the tax audit process is usually a detailed report on risks and recommendations for adjustments to ensure compliance.
The fundamental difference is that financial statement auditing focuses on the fairness and accuracy of the entire financial statement according to Vietnamese Accounting Standards (VAS) and Vietnamese Auditing Standards (VSA). Meanwhile, the scope of tax auditing is narrower but more in-depth, focusing only on the provisions of the Tax Law. Tax audit reports are primarily used to facilitate tax settlements with tax authorities, helping businesses feel more confident when facing official inspections.
Three indispensable roles of tax auditing in risk management.
The first and most important role of tax audits is to help businesses improve their compliance with the law. Through careful review, businesses can proactively detect and correct errors, avoiding large administrative penalties as stipulated in Decree 125/2020/ND-CP on administrative penalties in the field of taxation. This significantly reduces unnecessary costs from late payments or incorrect declarations.
The second role is to optimize tax costs legally. Through the tax audit process, experts will identify opportunities to apply preferential tax policies that businesses may have overlooked, such as exemptions or reductions in corporate income tax for new investment projects or operations in encouraged sectors. Fully utilizing these policies demonstrates extensive experience and expertise.
Thirdly, tax audits enhance the reliability and transparency of financial reporting. When tax items are verified and adjusted accurately, financial statements will more accurately reflect the company's financial situation. This is especially important when a company wants to raise capital, enter into business partnerships, or list on the stock exchange, where credibility and trustworthiness are key factors.
Legal basis and classification of tax audit types
To conduct accurate and legally valid tax audits, businesses need to rely on a comprehensive and consistent system of tax laws. Based on this foundation, various forms of tax audits are clearly categorized to meet the specific risk management and compliance needs of businesses. A proper understanding of the legal basis and each type of audit helps businesses choose the appropriate approach, prepare complete documentation, and be more proactive in the face of tax authority inspections and audits.
The legal framework governing tax audit activities.
Tax audit activities are built on a solid legal foundation, the core of which is the Law on Tax Administration 38/2019/QH14. This law clearly defines the authority of tax agencies in inspection and examination, while also stipulating the obligation of taxpayers to provide information. Detailed guiding documents include Decree 126/2020/ND-CP and related circulars of the Ministry of Finance, such as Circular 80/2021/TT-BTC.
All tax audit professionals must be familiar with these regulations to ensure high-level expertise in their work. Accurately citing relevant legal provisions when making adjustment recommendations not only strengthens the legal basis but also helps businesses understand the foundation of any decision. This is a crucial element in enhancing the value of the audit report.
Classification of common types of tax audits
Classifying tax audit types helps businesses orient themselves and prepare resources accordingly. Classification can be based on the entity performing the audit or the audited entity.
Classification by performing entity: internal tax audit and independent tax audit.
Tax audits can be classified by the entity performing them, including internal tax audits and independent tax audits. Internal tax audits are conducted by the accounting or internal audit department, helping businesses to self-review, detect, and correct errors before tax authorities intervene. Meanwhile, independent tax audits are conducted by professional auditing firms, providing objective opinions on tax law compliance, which is particularly important in mergers, acquisitions, or dispute resolution.
- Internal Tax Audit (Self-Audit): This is conducted periodically by the company's internal accounting or audit department. Its purpose is to self-review, detect, and correct errors before tax authorities or independent auditors intervene. This demonstrates the company's experience and proactive risk management.
- Independent Tax Audits: These are conducted by professional auditing firms under contract. They provide independent, objective opinions on tax compliance, particularly useful for purposes such as mergers and acquisitions (M&A), or dispute resolution.
Classification by audit subject: corporate and personal income tax audits
The scope of tax audits is very broad, but the two areas that are usually given the most attention are:
- Corporate income tax audit: This is the most complex part, focusing on the reasonableness and validity of deductible and non-deductible revenues and expenses according to regulations. For example, determining depreciation expenses for fixed assets or expenses related to employee incidental income all require thorough review during the tax audit process.
- Personal Income Tax (PIT) Audit: Focuses on correctly identifying taxpayers, taxable income, family deductions, and the proper withholding and payment of PIT according to regulations. Errors in calculating temporary income for seasonal workers are common.
| Criteria | Auditing Financial Statements | Tax audit |
| Main objective | Provide an opinion on the accuracy and fairness of the financial statements. | Assess tax compliance and determine accurate tax obligations. |
| Base | Accounting Standards (VAS), Auditing Standards (VSA). | Tax laws, circulars, decrees, and official guidance documents on taxation. |
| Scope | The complete financial statements (Balance Sheet, Income Statement, Cash Flow Statement, Notes to the Financial Statements). | Items that affect tax obligations (Revenue, Expenses, Invoices, Tax documents). |
| Time | Usually at the end of the accounting period (fiscal year). | This can be done at any time, or as needed for tax settlement. |
| Output | Audit report of financial statements. | Tax review and advisory report. |
Professional tax audit process: from preparation to completion.
To ensure effectiveness, the independent tax audit process typically follows a logical and systematic sequence of steps, reflecting the experience of the audit team.
Phase 1: Audit preparation and planning
At this stage, the tax audit service provider will gather basic information about the business, including its industry, organizational structure, and applicable accounting policies. Risk assessment is crucial, especially risks related to foreign transactions or sensitive items such as capital gains tax and related-party transactions.
A detailed tax audit plan will be developed, clearly defining the scope, timeframe, and key areas of focus, such as auditing corporate income tax or personal income tax. Resource allocation and sampling methods will also be determined at this stage.
Phase 2: Conducting the audit at the entity.
This is the stage where experts gather audit evidence. They will perform detailed testing procedures, including:
- Verify the legality of invoices and documents: Ensure that VAT invoices and payment documents fully meet the formal and substantive requirements as stipulated by current regulations.
- Reviewing Revenue and Expense items: Particular focus is placed on identifying deductible and non-deductible expenses when calculating corporate income tax. Expenses without valid invoices or supporting documents, or those not related to business operations, will be disqualified. This is the essence of auditing the corporate income tax aspect.
- Checking the application of preferential tax policies: Ensuring that businesses correctly and fully meet the conditions to enjoy preferential tax rates, avoiding cases of incorrect application leading to tax arrears. This requires high expertise and a thorough understanding of tax law.
- Checking personal income tax obligations: Review payroll records, salary and bonus regulations, and personal income tax deductions, especially for employees' occasional income.
Phase 3: Synthesis, reporting, and consultation for adjustments.
After completing the fieldwork, the tax auditor will compile the errors discovered and classify them according to their materiality. A tax audit report will be prepared, outlining recommendations for adjusting the declared tax figures.
Businesses will receive specific advice on corrective measures, adjustments to tax returns, and preparation of explanatory documents for the tax authorities. The goal is to help businesses proactively carry out adjustment procedures before the tax authorities conduct an audit, thereby minimizing penalties related to late filing or incorrect declarations. This timely advice demonstrates the expertise and reliability of the auditing firm.
Key items are often scrutinized during corporate and personal income tax audits.
Tax audits always pay special attention to certain items that are high-risk or prone to errors.
Auditing the Corporate Income Tax (CIT) component.
Non-deductible expenses
This is the most risky area in corporate income tax audits. Expenses such as exceeding advertising limits, ineligible interest expenses, depreciation expenses for assets not used in production or business, or penalties for breach of contract all require thorough review. Tax auditors will determine whether the business has correctly and fully excluded these expenses.
Transfer Pricing (TP)
For businesses with related-party transactions (as stipulated in Decree 132/2020/ND-CP), tax audits will focus on examining records determining transfer pricing. Non-market-based pricing may lead to the tax authorities reassessing the transaction value, resulting in increased corporate income tax payable. The risks associated with related-party transactions pose a significant challenge in international corporate income tax audits.
Auditing the personal income tax (PIT) section.
Review of temporary income and seasonal contracts
When conducting personal income tax audits, payments to employees without long-term contracts (probationary contracts, service contracts, occasional income) will be examined. Businesses must ensure that they have deducted tax (if the total payment is 2 million VND or more per transaction) and issued tax deduction certificates to employees within the prescribed timeframe as stipulated in Circular 111/2013/TT-BTC.
Allowances, subsidies, and benefits in cash or in kind.
Personal income tax audits will examine allowances, subsidies, or other benefits that businesses pay to employees. A clear distinction must be made between tax-exempt items (e.g., travel expenses, meal allowances) and taxable items. Combining these income items can lead to errors during personal income tax audits.
The benefits and risks of businesses facing tax audits.
Tax audits are not only a legal requirement but also a strategic tool that helps businesses improve compliance, optimize tax obligations, and prevent risks. Proactively conducting tax audits brings long-term benefits, from building credibility with tax authorities and avoiding criminal prosecution to exploiting legitimate tax incentives. Conversely, lack of preparation or violations can lead to tax arrears, administrative penalties, tax arrears, and even criminal prosecution, seriously impacting the company's finances and reputation.
Long-term benefits of proactively conducting tax audits.
Proactively conducting tax audits offers significant strategic benefits. Firstly, it helps businesses build a clean tax compliance history. When tax authorities recognize this proactive approach, the company's credibility is enhanced, reducing the likelihood of surprise inspections or audits.
Secondly, tax audits help businesses avoid criminal prosecution for tax evasion, especially when the scale of tax debt or fraud exceeds the thresholds stipulated by criminal law. This demonstrates expertise in high-level risk management. Thirdly, detailed tax audit reports provide a basis for optimizing and fully utilizing current preferential tax rates.
Legal and financial risks of tax violations.
If a business is not well-prepared for a tax audit or intentionally violates the rules, the legal and financial consequences can be very serious. The main consequences include:
- Tax arrears and administrative penalties: The tax authorities may collect back taxes owed for up to 10 years and apply administrative penalties (late payment penalties, incorrect declaration penalties) up to 20% of the back taxes collected.
- Tax debt pressure: If a large amount of tax is collected retrospectively, the business may fall into tax debt, and be subject to enforcement of administrative tax decisions (account freezing, asset seizure).
- Criminal Prosecution: In particularly serious cases, when tax evasion involves a large sum of money, the legal representative or chief accountant may be held criminally liable under Article 200 of the 2015 Penal Code (amended in 2017).
Tax optimization strategies and preparation for tax audits.
To effectively cope with any form of tax audit, businesses need to develop a solid tax strategy.
Take advantage of preferential tax policies.
A skilled tax auditor knows how to help businesses legally take full advantage of preferential tax rates. Businesses need to review the eligibility criteria for these incentives: for example, new investment projects in high-tech zones, encouraged industries (software production, education), or economically disadvantaged areas. All documentation proving eligibility for these incentives must be complete and clear.
Standardize accounting processes and documentation.
Professionalism in management is demonstrated through the standardization of records. All documents, input and output invoices, contracts, settlement minutes, and internal regulations (financial regulations, salary and bonus regulations) must be stored systematically and easily retrieved. This helps the tax audit process to be faster, smoother, and more accurate, minimizing errors related to tax audits.
Managing current income risk
For irregular income (unrecurring payments), a strict control process is necessary. Each payment must be accompanied by clear payment documentation, a service contract (if any), and proof of personal income tax withholding (or a commitment not to withhold if conditions are met). Errors in managing irregular income are often one of the most common mistakes when auditing personal income tax.
The relationship between tax audits and financial statement audits.
Although differing in objectives and scope, tax audits and financial statement audits are mutually reinforcing and closely related. The results of a tax audit will directly affect current and deferred tax items on the financial statements.
If a tax audit uncovers significant errors in determining deductible expenses (affecting corporate income tax), this will force the financial statement auditors to adjust tax expenses and after-tax profits, impacting the integrity of the report. Therefore, many large audit firms often offer integrated service packages, in which tax auditing is an integral part of the comprehensive audit process.
Simultaneous review saves businesses time and costs while ensuring all aspects of compliance are comprehensively considered. Both processes reinforce the authenticity and reliability of financial information in the eyes of shareholders, investors, and government agencies.
Common challenges encountered when conducting tax audits.
The challenge of the complexity of the tax legal system.
The Vietnamese tax legal system is frequently updated and supplemented with new circulars and guiding documents, creating difficulties for businesses and tax auditors alike. Interpretations of preferential tax regulations or conditions for deductible expenses are sometimes inconsistent, requiring experts to possess extensive expertise and continuously update their knowledge.
Difficulties in collecting and verifying documents.
During tax audits, particularly corporate and personal income tax audits, obtaining complete and valid original documentation is often a challenge. Many businesses do not maintain proper records or lack crucial documents such as detailed payroll statements, business contracts, or evidence of preferential tax treatment. This directly impacts the reliability of tax records.
Tax debt issues and criminal risks
When a business shows signs of fraud or has long-standing tax arrears, the tax audit process becomes more intense. Experts must work closely to accurately determine the amount of tax owed and advise on a remediation plan, preventing the business from facing criminal prosecution under the law.
Conclude
Tax audits are a crucial strategic tool and legal responsibility for the sustainable development of businesses. From accurately determining tax obligations and ensuring compliance with corporate and personal income tax audits, to leveraging tax incentives, this process both prevents risks and optimizes financial efficiency. An independent, professional tax audit helps businesses build trust with regulatory authorities and stakeholders, while also establishing a solid foundation for future business operations and expansion plans.
MAN – Master Accountant Network provides auditing services MAN provides professional tax accounting services, helping businesses review compliance, optimize tax obligations, and minimize risks during tax settlement. With a team of experienced experts and continuous updates on the latest tax regulations, MAN supports businesses from independent tax audits and document reviews to comprehensive tax accounting services. Our solutions bring transparency, accuracy, and security to your business's financial operations. Choose MAN for peace of mind during any tax audit.
Service contact information at MAN – Master Accountant Network
- Address: No. 19A, Street 43, Tan Thuan Ward, Ho Chi Minh City
- Mobile/Zalo: 0903 963 163 – 0903 428 622
- E-mail: man@man.net.vn
Content production by: Mr. Le Hoang Tuyen – Founder & CEO MAN – Master Accountant Network, Vietnamese CPA Auditor with over 30 years of experience in Accounting, Auditing and Financial Consulting.
FAQ – Frequently Asked Questions about Tax Audits
How is a tax audit different from a tax inspection?
Tax audits are independent, voluntary activities performed by businesses hired by external companies for the purpose of self-assessment, risk prevention, and cost optimization. Tax inspections, on the other hand, are mandatory activities carried out by tax authorities to verify compliance with tax laws. The purpose of a tax audit is to proactively correct errors before a tax inspection takes place.
What are the biggest risks that businesses typically face?
The biggest risks are the exclusion of expenses that are not deductible when calculating corporate income tax (such as expenses without valid invoices, exceeding advertising limits, and ineligible interest expenses), and the risk of related-party transactions (Transfer Pricing) for businesses with internal transactions. These are two key areas that tax authorities scrutinize most closely.
Can businesses that owe taxes face criminal prosecution?
Yes. According to Article 200 of the Penal Code, individuals who evade taxes on large amounts (from VND 100 million or more) or commit tax fraud may be prosecuted. Tax audits help businesses identify and rectify these issues early, avoiding serious legal consequences.
How is personal income tax calculated on irregular income (income that is not paid regularly)?
For payments of VND 2 million or more per transaction to individuals without long-term employment contracts, businesses must deduct personal income tax (PIT) before payment. Individuals can make a commitment form (02/CK-TNCN) to temporarily avoid tax deduction if their total income from this source is below the taxable threshold.
What is Preferential Tax?
Preferential tax refers to tax exemptions or reductions (e.g., corporate income tax) granted by the government to new investment projects or business activities in encouraged sectors (such as high technology, education, or economically disadvantaged areas). Maximizing these incentives is a crucial part of a legitimate tax optimization strategy.
