Comprehensive Guide to Accounting Books and Record-Keeping for FDI Enterprises

For foreign-invested enterprises (FDI), particularly Japanese companies known for stringent governance standards, establishing a standardized financial system from the outset is not only a legal obligation but also a foundation for all strategic decision-making. However, the pathway from scattered source documents to a complete set of financial statements is often full of challenges. In this article, KMC provides an A-to-Z guide to accounting book-keeping, helping you not only comply with Vietnamese law but also optimize operational efficiency.

Key Initial Step: Preparation Before Setting Up Accounting Books

Many FDI enterprises tend to rush into bookkeeping without first completing the necessary strategic setup steps. A proper A-to-Z accounting guide should begin with defining the following core parameters:

• Applicable accounting regime: Based on the enterprise’s scale and type, it is necessary to select either Circular 200/2014/TT-BTC (for medium and large enterprises) or Circular 133/2016/TT-BTC (for micro, small, and medium-sized enterprises). Proper understanding and selection of the appropriate regime from the outset is critical.
• Accounting system form: Choose one of the following forms: General Journal, Journal–Ledger, Voucher-Based Ledger, or Journal–Voucher. The General Journal form is the most commonly used due to its flexibility and compatibility with accounting software systems.
• Accounting policies: Establish consistent policies regarding tax calculation methods, depreciation methods, and inventory valuation methods (FIFO or weighted average method) to ensure data accuracy over time.

This setup requires a deep understanding of both local regulations and international practices. If a strong foundation is needed, KMC provides an in-depth A-to-Z accounting setup roadmap, helping enterprises eliminate the risk of systemic errors from the very beginning.

Mandatory and Optional Accounting Books and Records

In any A-to-Z accounting guide, distinguishing between statutory accounting books and internal management records is essential. According to the Ministry of Finance regulations, the following records are considered core components:

1. General Journal (Form S03a-DN): Records economic transactions in chronological order as they occur.
2. General Ledger (Form S03b-DN): Reflects the movement and changes of each accounting account.
3. Detailed accounting books and subsidiary ledgers: Used for inventory, receivables and payables, or fixed assets.
4. Cash book and bank deposit ledger: Used to control actual cash flows.

In addition, multinational corporations often establish detailed management reports to serve their parent companies. The mandatory list in this accounting guide must be carefully maintained and properly archived to ensure readiness for tax inspections

7-Step Standard Accounting Process for FDI Enterprises

To ensure systematic and well-controlled data flows, KMC’s accounting guide recommends the following 7-step process:

• Step 1 – Collecting, verifying, and processing source documents: All transactions must be supported by valid, lawful, and legitimate documents. This is a critical step that determines the accuracy of the entire accounting system.
• Step 2 – Classifying and recording transactions into accounting software: Information from source documents is entered into the accounting system using appropriate journal entries.
• Step 3 – Recording in the General Journal: The software will automatically post or the accountant will manually record all transactions into the General Journal.
• Step 4 – Posting to the General Ledger and subsidiary ledgers: Data from the General Journal is transferred into the relevant General Ledger accounts and detailed subsidiary ledgers.
• Step 5 – Preparing the Trial Balance: This is a key control and reconciliation step used to detect errors before preparing financial statements. Total Debits must equal total Credits.
• Step 6 – Preparing Financial Statements: This includes the Balance Sheet, Income Statement, Cash Flow Statement, and Notes to the Financial Statements.
• Step 7 – Printing, signing, and archiving accounting books: Accounting records must be printed, signed by the preparer, Chief Accountant, and Legal Representative, and stored in accordance with statutory retention requirements.

Handling Real-World Challenges in Accounting Bookkeeping

Theory is one thing, but in practice, numerous issues may arise. Below are common situations and recommended solutions:

• Missing or invalid accounting documents: A report on lost documents must be prepared immediately, and replacement documents should be obtained where legally possible. It is important to always request copies during transactions and to properly maintain both electronic and physical records.
• Discrepancies between accounting books: Return to the Trial Balance reconciliation step. Review each transaction in the period, especially closing entries and adjusting entries. The principle is “trace back to the source” — from subsidiary ledgers back to original source documents.
• Common data entry errors: These include incorrect account codes, duplicate postings, missing documents, or incorrect amounts. The best preventive measure is to establish a robust internal control system with clearly defined responsibilities (data entry personnel vs. review/control personnel).
• Best practices for document organization: Documents should be arranged chronologically within each month and clearly classified by type (input/output invoices, cash receipts/payments, bank transactions). This not only facilitates quick retrieval when needed but is also extremely useful during tax audits and inspections.

Golden Principles: Compliance, Accuracy, Confidentiality, and Archiving

The application of any accounting book-keeping guide must go hand in hand with strict information security principles. For Japanese companies in particular, discipline is a fundamental requirement. All transactions must accurately reflect their economic substance and be protected against unauthorized access.

• Absolute legal compliance: All transactions must be recorded in accordance with the Law on Accounting, the Law on Tax Administration, and all relevant guiding regulations in force.
•   Accuracy and truthfulness: Figures must correctly reflect the nature of each transaction. Even minor errors may lead to significant tax risks and reputational damage for the enterprise.
•  Information confidentiality: Financial data is highly confidential. Appropriate security mechanisms must be implemented, including software access control, user permission management, and data protection measures.
•  Complete and systematic archiving: Accounting documents and records must be retained for a minimum of 10 years. Electronic storage is acceptable provided that it meets the legal requirements prescribed by law.

KMC – A Trusted Partner for Sustainable Growth

Building a professional accounting system in 2026 requires a combination of technology and deep expertise. With hands-on experience, KMC’s accounting bookkeeping guide helps FDI enterprises remove barriers arising from differences in accounting standards.

We hope this accounting guide has provided investors with a clear and comprehensive overview. To receive more detailed, tailored guidance on accounting book-keeping that best fits your business model, please connect with KMC’s team of experts via hotline 081 489 4789 today.