FDI Statutory Audit in Vietnam: Rules, Deadline & Penalties

Statutory financial statement audits are a mandatory legal obligation for all foreign-invested enterprises (FDIs) under Vietnam’s accounting and reporting framework. In contrast to regional jurisdictions where small and medium-sized private corporations qualify for audit exemption thresholds based on turnover or asset size, Vietnamese legislation enforces full financial transparency over foreign capital from the first day of corporate licensing.

For foreign executive directors, financial controllers, and overseas headquarters, the annual independent audit extends beyond a routine administrative exercise designed to avoid regulatory penalties. An audited financial report forms the evidentiary basis for annual corporate income tax (CIT) finalization, validates the deductibility of operational business expenses, and is one of the filing conditions for cross-border profit remittances. Completing the audit within the 90-day filing deadline under Circular 99/2025/TT-BTC is a core governance priority for every foreign investment vehicle.

1. Legal Framework and Mandatory Audit Obligations for FDI Entities

The statutory audit framework in Vietnam is established under the Law on Independent Audit No. 67/2011/QH12 (as amended by Law No. 56/2024/QH15), the Law on Accounting No. 88/2015/QH13 (as amended in 2024), and Government Decree No. 17/2012/ND-CP detailing statutory audit implementation.

Under Article 37 of the Law on Independent Audit and Article 15.1.a of Decree 17/2012/ND-CP, every enterprise with foreign-invested capital must have its annual financial statements examined and verified by an accredited independent audit firm licensed by the Ministry of Finance. This statutory mandate applies regardless of charter capital, revenue, or headcount:

• Wholly foreign-owned enterprises (100% WFOE) and equity joint ventures regardless of foreign ownership percentage.
• Greenfield investment projects undergoing initial construction and factory setup that have not yet generated commercial revenue or issued commercial sales invoices.
• Enterprises in temporary business suspension or micro-scale units with fewer than 5 staff remain foreign-invested enterprises, as the Law on Independent Audit offers no size-based exemption.
• Branches of foreign corporations in Vietnam: confirm the specific obligation with the tax authority or your audit firm.

By contrast, domestic private enterprises are subject to mandatory statutory audits only if they fall within groups such as credit institutions, financial institutions and insurers, public and listed companies, state-owned enterprises, or large-scale enterprises designated by the Government under the Law on Independent Audit (as amended by Law 56/2024/QH15). This statutory distinction reflects the regulatory priority of Vietnamese authorities to monitor cross-border capital inflows, regulate foreign currency movements, and prevent international tax base erosion through intercompany transfer pricing.

2. The 90-Day Filing Deadline and 5-Step Independent Audit Roadmap

Under the Law on Accounting, the statutory deadline for submitting annual audited financial statements is 90 days following the end of the fiscal year. For enterprises adopting the standard calendar year ending December 31, the statutory filing deadline is March 31 of the following calendar year. For entities adopting an alternative approved fiscal year ending March 31, June 30, or September 30, the 90-day calculation applies strictly from their respective fiscal closing dates.

Because accredited audit firms face capacity constraints during the first quarter compliance rush, foreign enterprises must organize their preparation across a structured 5-step roadmap:

1. Step 1 - Audit Firm Selection and Engagement (September - November): Review the Ministry of Finance register of licensed independent audit practices, define the engagement scope, verify auditor credentials, and formally execute the audit service contract prior to the close of the fiscal period.
2. Step 2 - Interim Audit Fieldwork and Physical Stocktaking (November - December): Facilitate interim testing of operational controls, review year-end cut-off procedures, and ensure audit teams physically attend and witness the year-end physical count of cash funds, fixed assets, and raw materials or merchandise inventory on December 31.
3. Step 3 - Accounting Book Closing and Draft Accounts Preparation (January): The chief accountant completes necessary accruals, amortization calculations, intercompany balance reconciliations, and compiles the complete draft of financial statements adhering strictly to Vietnamese Accounting Standards (VAS).
4. Step 4 - Substantive Audit Fieldwork (February): Independent audit teams conduct substantive transactional testing, inspect supporting accounting vouchers, dispatch third-party confirmation letters to commercial banks and counterparty debtors under VSA 505, and review tax compliance filings.
5. Step 5 - Audit Clearance, Sign-off, and Filing (March): Review proposed audit adjustment entries, sign formal management representation letters, obtain final signed audited reports, and file with the competent authorities before March 31.

3. Filing of Audited Financial Statements with Regulatory Agencies

Annual audited financial statements are filed with the competent state authorities together with the audit report under the Law on Accounting and Circular 99. In practice, an FDI enterprise deals with three main counterparts:

• Supervising Tax Office: Uploaded electronically through the Department of Taxation eTax portal alongside the Annual Corporate Income Tax Finalization Return (Form No. 03/TNDN). The audited figures serve as the official benchmark against which tax inspectors cross-examine self-assessed corporate income tax liabilities.
• Provincial Statistics Office: Receives the enterprise’s investment-activity report under Decree 96/2026/ND-CP, not the audited financial statements.
• Investment Registration Authority: The Department of Finance (incorporating the former Department of Planning and Investment) or the relevant Industrial Zone Management Board receives the annual investment-activity report through the National Investment Information System by March 31 under Decree 96/2026; see FDI periodic reporting.

Foreign enterprises located within Industrial Parks, Export Processing Zones, or High-Tech Zones should also check the reporting requirements of the Zone Management Authority stated in their licence or Investment Registration Certificate (IRC). Audited statements are also sent to overseas parent entities for group consolidation under IFRS.

4. Internal Controls (Article 3 of Circular 99/2025/TT-BTC) and Auditing Standards

Taking effect from January 1, 2026, for financial years beginning on or after this benchmark date, Circular 99/2025/TT-BTC replaces Circular 200/2014/TT-BTC and sets internal control requirements that audit engagements will test, alongside separate auditing-standard and professional rules:

• Mandatory Written Internal Control Regulations: Under Circular 99, enterprises must establish their own internal governance rules (or equivalent documents) and organize internal control. Under auditing standard VSA 315, auditors assess risk, including an understanding of internal controls, and therefore typically look at expenditure approval procedures, signature authorities, and the segregation of duties between custody and accounting personnel.
• Auditing Verification for Newly Created Accounts: Circular 99 adds ledger accounts, most notably Account 215 (Biological Assets) and Account 82112 (Top-up Corporate Income Tax under the Global Minimum Tax framework regarding QDMTT and IIR rules). These accounts are new under Circular 99, so expect auditor questions on how they were set up.
• Independent Auditor Rotation (not part of Circular 99): Under the Law on Independent Audit, a source separate from Circular 99, after more than five consecutive years with the same audit firm the enterprise must require a change of signing auditor (Article 39 of the Law on Independent Audit); for public-interest entities the 5-year cap is in Article 58. FDI enterprises should plan auditor rotation before reaching this limit.

A lack of documented internal controls or missing management approval records significantly elevates evaluated control risk, prompting auditors to expand transactional sampling and potentially delaying final report sign-off.

5. Administrative Penalties and Business Impacts of Modified Audit Opinions

Failure to execute mandatory financial statement audits or submitting audited statements past the statutory 90-day deadline triggers administrative sanctions: late filing under Government Decree No. 41/2018/ND-CP (accounting), and failure to audit under Decree No. 228/2025/ND-CP (independent auditing):

• Penalties for Late Financial Statement Submissions (Article 12): Delayed filing of less than 3 months incurs administrative fines from VND 5 million to 10 million; delays of 3 months or more, or filing without the audit report, incur VND 10 million to 20 million; non-submission of required reports incurs fines between VND 40 million and 50 million for corporate organizations.
• Penalties for Failure to Audit Mandated Financial Statements (Decree 228/2025): Enterprises subject to compulsory audit requirements that fail to retain a licensed audit firm to perform statutory audits face administrative fines from VND 40 million to 50 million for organizations.

Beyond financial penalties, the greatest commercial and operational threat to foreign enterprises stems from the audit opinion category rendered by the independent auditor:

Under Decree 252/2026/ND-CP, an enterprise may remit annual profit abroad only after it has filed the audited financial statements and the CIT finalization return, paid all tax, and carries no accumulated loss after loss carry-forward. Banks handling the transfer typically ask for documents evidencing these conditions. If the bank asks for proof of tax compliance, the enterprise can request a tax-obligation confirmation on Form 01/ĐNXN from its supervisory Tax Department (Circular 89/2026/TT-BTC).

6. Actionable Audit Compliance Recommendations for Foreign Investors

To maintain audit compliance, prevent regulatory penalties, and reliably obtain an unmodified audit report, foreign-invested enterprises should apply these 5 recommendations:

1. Formalize Audit Appointments Early: Complete market tenders and sign independent audit engagements before November 30 to lock in senior, experienced audit teams ahead of peak first-quarter demand.
2. Execute Structured Year-End Inventory Counts: Conduct full year-end physical counts for cash, inventory, and tangible fixed assets on December 31 with mandatory physical auditor observation, generating detailed variance reconciliation minutes.
3. Dispatch Full Third-Party Confirmations: Maintain updated counterparty directories and issue 100% external confirmation requests covering bank accounts, trade receivables, trade payables, and intercompany loans in accordance with VSA 505.
4. Assemble Transfer Pricing Documentation Early: Prepare Transfer Pricing local files and master documentation under Decree 255/2026/ND-CP in advance, enabling auditors to verify the substance, market pricing, and tax deductibility of cross-border management fees, royalties, and loan interest.
5. Enforce Chief Accountant Supervision: Ensure the licensed chief accountant performs careful closing checks on expense accruals, depreciation schedules, and tax provisions under Circular 99 prior to releasing initial trial balances to the audit team.

Coordinating year-end closing schedules and working papers before fieldwork starts helps prevent bottlenecks ahead of the March 31 filing deadline. For assistance with statutory audit readiness, explore Indochina Link Vietnam’s audit support services.