Thai Customs runs a paperless system. The declaration is transmitted electronically, risk-assessed, and returned with a channel assignment before the cargo is touched.
01The filing sequence
- Register. The exporter or importer must hold a Customs registration with a digital certificate. The broker files under a granted authority.
- Transmit the declaration. Invoice, packing list, B/L or AWB data, HS codes, values, and privilege claims.
- Validation. The system checks structure, code validity, and cross-field consistency. Errors return within minutes.
- Payment. Duty and VAT paid electronically. VAT on imports is 7% of CIF value plus duty plus excise where applicable.
- Channel assignment.
- Green line — released without inspection.
- Red line — physical or X-ray inspection before release.
- Release and gate-out. The delivery order is matched and the container leaves.
Risk assessment considers importer history, goods type, origin, value plausibility, and declared privileges. A clean filing history is a commercial asset — green-line rates translate directly into faster delivery and lower demurrage.
02Claiming FTA preference correctly
Three things must all be true:
- The goods meet the origin rule for that agreement.
- A valid certificate of origin exists, issued by the competent authority or self-certified by an accredited exporter.
- The consignment is direct, or any transhipment satisfies the agreement's direct-consignment rule.
03The origin rules you will meet
- WO — Wholly Obtained. Grown, mined, or born and raised in the country. Agricultural and mineral goods.
- CTC — Change in Tariff Classification. Non-originating inputs change HS heading (CTH) or subheading (CTSH) through processing in Thailand.
- RVC — Regional Value Content. Usually 40% under ATIGA. Calculated either as (FOB − value of non-originating materials) ÷ FOB × 100, or by direct build-up of originating costs.
- PSR — Product Specific Rules. Some products have their own rule that overrides the general one. Always check the PSR annex before relying on the general rule.
04e-Form D and self-certification
ASEAN has moved Form D onto electronic exchange between member states. Certificates are transmitted directly between customs administrations, so the destination authority verifies against the issuing authority's record rather than a stamped paper.
Under the ASEAN-Wide Self-Certification scheme, a Certified Exporter may declare origin on the commercial invoice itself, without applying for a certificate per shipment. The accreditation requires demonstrated origin record-keeping — worth it for exporters shipping frequently within ASEAN.
05The common failures
| Failure | What happens |
|---|---|
| CO issued after shipment without "ISSUED RETROACTIVELY" marked | Preference refused |
| HS code on CO differs from the import declaration | Query, often refusal |
| Third-country invoicing not declared on the CO | Preference refused |
| Transhipment without through B/L or non-manipulation certificate | Direct consignment rule fails |
| RVC calculated on selling price instead of FOB | Wrong percentage, invalid claim |
Preference is worth real money — often 5–20% of value. It is worth the paperwork discipline that keeps it.