SUMMARY OF UPDATED CUSTOMS UNIT CODE CHANGES EFFECTIVE FROM JUNE 1, 2026
To support businesses in promptly updating changes related to the Customs unit code system under the Regional Customs model, THT Cargo Logistics would like to summarize the key points based on:
- Official Letter No. 489/CNTT-QLVH dated May 19, 2026 issued by the Customs Department regarding updates to Customs units;
- Official Letter No. 240/VBNB-CNTT regarding the implementation of Customs unit code changes on IT systems.
These changes will officially take effect from June 1, 2026 across all electronic Customs systems and will directly impact customs declaration processes, registration procedures, and system operations for import-export enterprises, warehouse operators, and port businesses.
1. Official Application of New Customs Unit Codes from June 1, 2026
According to the latest guidance from the Customs Department, the entire Customs system will transition to a synchronized application of new Customs unit codes under the Regional Customs management model.
- Several Customs units will be merged and assigned new management codes.
- Units currently using multiple Customs codes will be consolidated into one single management code.
- This update will be implemented simultaneously across all IT systems related to Customs declarations and Customs operations.
The objectives of this update include:
- Standardizing the Regional Customs management model
- Enhancing data synchronization across Customs systems
- Optimizing Customs operational management and processing
- Reducing overlapping Customs unit codes during declaration procedures
2. Specific Update for Dong Nai Port Customs Branch
For Dong Nai Port Customs Branch, businesses should pay special attention to the following important changes:
- The official Customs code to be used from June 1, 2026 will be 47D3.
- The previous codes 47D1, 47D2, and 47D3 will be consolidated under the unified code 47D3.
- Warehouse, depot, and port operators are required to proactively register/update information on the VASSCM system before May 31, 2026.
3. Important Notes During VNACCS/VCIS Declaration Process
During the transition period, the electronic Customs system will maintain parallel operation of both old and new Customs codes to support businesses in processing pending operations.
- The VNACCS/VCIS system will continue supporting old Customs codes for:
- Processing pending declarations
- Liquidation procedures
- Incomplete Customs operations before the transition date
However, businesses should pay particular attention to the following:
- Do not register new declarations using old Customs codes after the official implementation date.
- Proactively review:
- Internal declaration systems
- Current Customs code lists in use
- ERP/WMS software integration (if applicable)
- Data connections with forwarders, warehouses, and ports
Using incorrect Customs unit codes may result in:
- Errors during declaration registration
- Delays in Customs processing
- Disruptions to customs clearance schedules
- Additional amendment procedures
4. Reference Documents
📄 Official Letter No. 489/CNTT-QLVH dated May 19, 2026
📄 Official Letter No. 240/VBNB-CNTT
5. Recommendations from THT Cargo Logistics
THT recommends that businesses proactively:
- Review all Customs unit codes currently used in internal systems
- Update information promptly on VASSCM and related systems
- Coordinate with logistics teams, customs brokers, and IT departments to ensure a smooth transition process
- Carefully verify Customs unit codes before registering new declarations after June 1, 2026
Early preparation will help businesses minimize declaration disruptions and ensure stable import-export operations during the Customs system transition period.
Need Support Reviewing Customs Codes and Updating Systems?
THT Cargo Logistics is ready to support businesses in updating Customs unit code changes, reviewing declaration procedures, and advising on operational issues arising during the transition to the new Customs system.
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