Manufacturing audits are independent examinations aimed at assessing the accuracy and fairness of financial statements. This process focuses particularly on complex items such as production costs and inventory. In the context of Vietnam becoming the world's "factory," transparency in financial data is key for businesses to attract sustainable investment.
According to Independent Auditing Law 2011FDI enterprises and listed companies in the manufacturing sector are required to conduct annual audits. This helps managers identify loopholes in the internal control system and prevent fraudulent cost allocation. As evidence from tax audits, cost errors often account for 40% of the amount of tax arrears collected from manufacturing companies.
The core objective of manufacturing industry audits.
Before delving into the technical details, we need to clearly define the ultimate goal of auditing the manufacturing industry. Unlike commerce, the manufacturing industry has a closed cycle from raw material procurement to the formation of finished products.
Determine the exact cost of the product.
The primary objective of manufacturing audits is to examine the reasonableness of cost aggregation. Auditors will compare technical standards with actual costs incurred to detect any irregularities in consumption. The allocation of labor and manufacturing overhead costs is also assessed. Circular 200/2014/TT-BTC It needs to be done consistently.
Inventory control and evaluation
Inventory typically accounts for the largest proportion of a manufacturing business's total assets. Manufacturing audits focus on verifying the existence of raw materials and work-in-progress through physical inventory checks. Additionally, assessing provisions for bad debts according to VAS 02 is crucial to ensure assets are not overvalued.
Legal framework and standards applicable to auditing in the manufacturing industry.
To ensure quality, manufacturing audits must be based on a rigorous system of legal regulations. Compliance helps businesses avoid legal risks and discrepancies in material data.
| Legal documents | Content adjustments | Notes for manufacturing businesses |
| Independent Auditing Law 2011 | General regulations on auditing activities | Entities that are required to be audited |
| Circular 200/2014/TT-BTC | Business accounting system | Instructions for accounting for expenses (621, 622, 627) |
| VSA system (VSA 315, 330, 500) | Vietnamese Auditing Standards | Risk evidence gathering process |
| Accounting Standard VAS 02 | Inventory | Methods for calculating inventory cost and provisions. |
Understanding these regulations helps auditors form accurate opinions on compliance. If a business does not apply the correct pricing method, such as FIFO, the audit results for the manufacturing industry will inaccurately reflect profitability. This can lead to serious consequences when settling taxes.
Detailed audit procedures for the manufacturing industry.
A well-structured manufacturing audit typically goes through three main phases: Planning, Execution, and Completion. Each phase plays a crucial role in forming an independent audit opinion.
Planning and risk assessment phase
During this stage, auditors need to understand the specifics of the unit's production process. For example, an electronics factory will have a higher risk of product obsolescence than a food factory. Manufacturing audits require determining materiality levels for items such as Direct Material Costs (621).
Test of Controls
Auditors will examine the effectiveness of the internal control system at the factory. This includes reviewing the process for approving production orders and material requisition slips. Manufacturing audits also assess the separation of responsibilities between the warehouse and cost accounting departments to prevent fraud.
Substantive Procedures
This is the most time-consuming stage in the manufacturing audit process. Auditors conduct a comparative analysis of the cost of goods sold/revenue ratio across periods to identify unusual fluctuations. Detailed inspection procedures for purchase invoices and cut-offs are also performed to ensure correct recording in the appropriate period.
Cost and pricing audits – the “heart” of manufacturing audits.
Production costs are a complex factor, requiring auditors to have in-depth knowledge of management accounting. Accurately assessing the components of cost helps businesses optimize profits.
Auditing of direct material costs
Audits in the manufacturing sector focus on comparing actual material consumption norms. If actual usage exceeds the norms without justification, auditors will suspect waste. According to Circular 200, costs exceeding the norms must be directly transferred to expenses in the current period instead of being included in the cost of goods sold.
Auditing direct labor costs
Auditors will review timesheets, wage rates, and payroll deductions for workers. A key point in manufacturing audits is identifying the correct recipients of wages. This ensures that production workers' salaries are not confused with those of office management staff.
Auditing of manufacturing overhead and work-in-process costs.
General production costs (627) include depreciation, electricity, water, and auxiliary materials. Manufacturing industry audits focus on examining the allocation of these costs to each product type. The valuation of work-in-progress at the end of the period is also done thoroughly because this is an area prone to data manipulation.
Common risks in manufacturing industry audits and solutions.
Based on experience from MAN – Master Accountant Network, risks in the manufacturing industry are often very specific. Businesses need to proactively identify them in order to have timely solutions.
- Inventory value risk: Businesses often forget to set aside provisions for defective or obsolete goods.
- Risks related to cost allocation: Using inconsistent allocation criteria across years creates artificial volatility.
- Risk of cost capitalization: Confusing major repair costs with fixed asset upgrades to reduce fictitious losses.
Proposed solution for businesses:
- ERP software is used to track production and inventory data in real time.
- Establish a process for conducting periodic quarterly inventory checks instead of focusing solely on the end of the fiscal year.
- Utilize professional manufacturing audit services to ensure maximum objectivity.
Conclude
Auditing in the manufacturing sector is not just about confirming figures, but also about providing advice to help businesses optimize their processes. Properly conducted audits give businesses confidence in the face of tax inspections. In the digital age, transparent audit reports are a crucial "passport" for businesses to expand internationally.
If your business is struggling with cost management, contact MAN – Master Accountant Network. We are a leading network of experts in auditing and tax accounting services for the manufacturing industry. With a team knowledgeable in Vietnamese law, MAN is committed to helping your business comply with regulations and achieve sustainable growth.
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
- Email: 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.
Frequently Asked Questions about Auditing in the Manufacturing Industry
Are small manufacturing businesses required to undergo audits?
While not legally mandatory for small private businesses, a manufacturing audit is crucial documentation when applying for bank loans or demonstrating financial capacity to partners.
When is the appropriate time to begin preparing for an audit?
Businesses should start preparing in November, especially in reviewing documents and finalizing physical inventory figures.
How are audit costs calculated for the manufacturing industry?
Service fees are typically based on the scale of revenue and the complexity of the product costing process.
Does an audit of the manufacturing industry involve a detailed examination of product costs?
Yes. Auditors will review the cost calculation methods, material consumption standards, general manufacturing overheads, and cost allocation to ensure that the figures accurately reflect reality.
What documents do businesses need to prepare when undergoing an audit in the manufacturing sector?
Businesses need to prepare detailed accounting records, cost calculation sheets, inventory records (inflow, outflow, and stock levels), inventory count reports, and sales contracts related to production activities.
