Circular 99 Explained: What businesses must act on today.

In this Acclime Conversation episode, Ms Thy Le, Manager of Accounting and Tax at Acclime Vietnam, explains Circular 99/2025/TT-BTC, which replaces Circular 200 from 1 January 2026. The discussion covers the move towards a principle-based framework, what the added flexibility means in practice and how to prepare before the effective date. Topics include:

• The broader scope of Circular 99, including credit institutions and foreign bank branches
• New expectations around internal governance and internal control
• Flexibility to design your own voucher forms and accounting book templates
• Customising the chart of accounts to match operating and management needs
• Using a foreign currency as the accounting currency and applying the conversion approach consistently
• Starting the transition with a gap analysis against the current accounting framework
• Updating the chart of accounts, templates and ERP mapping
• Running a mock closing and strengthening consolidation, particularly intercompany transactions
• Engaging advisers and auditors early to align on interpretation