What Is Section 19 Bis, and How Do Exporters Reclaim Duty?

An exporter who imports raw materials, pays duty on them, and then manufactures those materials into finished goods for export is, in one sense, taxed twice on the same trade flow: once on the way in, and effectively again through the cost of the duty embedded in an export price that has to compete internationally. Section 19 Bis of Thailand's Customs Act exists to address exactly this — it lets an importer reclaim duty already paid on raw materials once those materials can be shown to have gone into goods that were subsequently exported.

For a freight forwarder or an SME exporter encountering this for the first time, the mechanism can look similar to a BOI duty exemption from a distance, since both ultimately reduce the duty burden on materials used for export-oriented manufacturing. But they work in opposite directions and involve different administering considerations, different documentation, and different timing — understanding that difference matters for anyone trying to work out which mechanism, if either, actually applies to a given shipment.

The Basic Mechanism: Duty Paid First, Refunded Later

Under Section 19 Bis, duty is not waived at the point of import — it's paid in full, the same as any standard commercial import of raw materials. The relief comes afterward, as a refund claim, once the importer can demonstrate that the specific imported material was used to manufacture goods that were subsequently exported. This is a fundamentally different structure from an upfront exemption: the company carries the duty cost through the manufacturing cycle and recovers it only after the export leg is complete and documented.

The practical implication is that this mechanism is a cash-flow and paperwork commitment, not an instant discount. A company relying on Section 19 Bis needs working capital to cover the duty at import, and needs a records system robust enough to prove, potentially months later, that a specific batch of imported material ended up in a specific batch of exported product. Without that traceability, the fact that the material was genuinely used for export production isn't enough on its own — the claim has to be provable, not just true.

What a Freight Forwarder Needs to Get Right at Import

Because a Section 19 Bis claim is only as strong as the documentation trail behind it, the import stage — the part of the process a freight forwarder is most directly involved in — sets the foundation for a claim that may not be filed until much later. Accurate HS code classification, precise quantities, and a customs value that matches what was actually declared and duty-paid all become the anchor the later refund claim references.

An error at this stage doesn't necessarily block the import itself, but it can quietly undermine a drawback claim built on it far downstream, when correcting the original record is far more difficult than getting it right the first time. A forwarder working with an exporter who plans to use Section 19 Bis should treat the import declaration with the same care as if a refund claim were already pending, because — for the company's internal recordkeeping — it effectively is.

Tracing the Chain: Import, Production, Export

The core evidentiary requirement behind a Section 19 Bis claim is a documented chain connecting three points: the original import (what was brought in, in what quantity, with what duty paid), the manufacturing process (how that specific material was used in production), and the export (what finished goods left the country, and how they trace back to the imported material). Each link needs to hold up on its own and connect cleanly to the next.

In practice, this means production and inventory records inside the manufacturing operation matter just as much as the trade documents at the border. A company that imports a raw material in bulk and draws from a mixed inventory for multiple product lines needs a way to allocate a specific import batch to a specific export run — whether through batch numbering, a bill-of-materials system, or another traceable method — because Customs is verifying the link, not taking the exporter's summary claim at face value.

Why This Is Not the Same as a BOI Exemption

It's worth being explicit about the distinction, because the two mechanisms are sometimes conflated. A BOI duty exemption removes duty at the point of import, for machinery or materials covered under a company's approved promotion certificate — the company never pays the duty in the first place, for goods within that approved scope. Section 19 Bis, by contrast, applies more broadly to importers who pay duty on raw materials and later export goods manufactured from them, and works as a refund rather than an upfront exemption.

A company can, in principle, be BOI-promoted and separately have shipments that fall outside its BOI project scope where a Section 19 Bis claim might be relevant instead — the two mechanisms aren't mutually exclusive, but they also aren't interchangeable, and mixing them up in planning can lead to a shipment being handled under the wrong process from the start. Which mechanism, if either, actually fits a given shipment is a determination that should be made against the company's own circumstances, ideally with input from its customs broker or the Customs Department directly.

What Commonly Goes Wrong With a Drawback Claim

The most common source of friction in a Section 19 Bis claim isn't the underlying eligibility — it's the traceability. An exporter that genuinely used imported, duty-paid material to manufacture goods for export can still struggle to support a claim if the internal records weren't built with that link in mind from the start: inventory systems that don't distinguish between imported and locally sourced material, production records that track output but not input batches, or export declarations that don't reference the production run clearly enough to connect back.

Another common issue is timing — treating the claim as something to assemble whenever convenient, rather than being aware of the filing window Customs regulation sets. Because current time limits, refund percentages, and eligible categories of raw material are set by Customs Department regulation and can be updated, a company relying on this mechanism benefits from checking its current standing periodically rather than working from what applied on a previous claim.

Working With a Forwarder and Broker on a Drawback-Eligible Shipment

For an exporter setting up a supply chain around Section 19 Bis, the practical starting point is telling the freight forwarder and customs broker upfront that a shipment is intended to feed export production and may support a future drawback claim. This lets the forwarder pay closer attention to the accuracy of the import declaration, retain copies of duty payment records in an organized way, and flag if anything about the shipment's documentation looks likely to complicate a claim later — such as a mixed consignment where only part of the material is destined for export production.

A customs broker experienced with drawback claims can also advise on what internal records the company should be keeping in parallel, even though the manufacturing-side recordkeeping itself is the exporter's own responsibility rather than the forwarder's or broker's. Treating this as a coordinated effort from the first shipment, rather than something addressed only once a claim is being prepared, is what generally keeps the paperwork usable months down the line.

Example

Consider a Thai manufacturer that imports a specialty component, pays the applicable duty, and uses it in a product line built specifically for export markets. From the outset, the company's forwarder tags the import declaration clearly, retains the duty payment record, and confirms the HS code classification with the broker. Internally, the manufacturer's production system assigns a batch number to each incoming shipment of the component and records which finished-goods production runs drew from which batch.

When a shipment of the finished product is exported several months later, the export declaration references the production run, which in turn traces back through the batch records to the original import declaration and duty payment. With that chain intact, the company's customs broker is able to assemble a drawback claim with a clear, verifiable link between the duty paid and the exported goods.

Contrast this with a company that imports the same component into a shared inventory pool used for both domestic and export product lines, without batch-level tracking. Even if a portion of that material genuinely went into exported goods, the company may struggle to prove which specific import batch it came from — and a claim built on an unclear allocation is far more likely to be challenged, regardless of how legitimate the underlying export activity actually was.