Importing into Thailand runs through the Thai Customs Department's electronic system, usually called e-Customs. The importer, or a customs broker acting for it, files an import declaration against the carrier's manifest. The system then routes the shipment to a green line (a quick online check) or a red line (documents and a physical inspection), and duty and VAT are paid before release. Anything controlled by another agency, such as food, medicines or certain industrial goods, needs that agency's permit before the goods arrive. This guide covers the Customs Act, the declaration, valuation, duty, the VAT rate, FTA preferences, permits and the usual delay points. Figures are as of November 2026; check the current rule for your goods. If your cargo is leaving Thailand rather than entering it, see the Thailand to USA shipping guide for the outbound leg.
What law governs imports into Thailand?
The Customs Act B.E. 2560 (2017) replaced the 1926 customs law. It was published in the Royal Gazette on 17 May 2017 and took effect 180 days later (Tilleke & Gibbins, June 2017). Duty rates themselves sit in the Customs Tariff Decree B.E. 2530 (1987) and its amendments. Three features of the Act matter to importers in practice:
- Reassessment window. Customs has three years from the date an entry is submitted to assess duty, which the Director-General may extend by up to two years. Where there is evidence of intent to evade duty, a further five years can apply.
- Personal liability. Criminal liability can reach directors and managers where an offence results from their order, act or neglect of duty, rather than attaching strictly to the company.
- Appeals. A Board of Appeal hears appeals, and if it does not decide within 180 days of receiving the appeal and complete documents, the appellant may go to court. The US Commercial Service's Thailand customs page (April 2026) also notes that appeals to the Customs Department are made within 30 days of notification.
Because the reassessment window is measured in years, keep your import records for far longer than the short retention periods some guides quote. The customs audit readiness guide lists what to keep.
Who can file the import declaration, and how does e-Customs work?
Thailand's National Trade Repository describes the import process this way: before or on arrival, the shipping agent transmits the vessel or aircraft arrival report and manifest to e-Customs. The importer or its customs broker then files the import declaration. The system checks the declaration against the manifest and the actual arrival and issues a declaration number only if they match. It also issues a payment number and assigns a green or red line.
The same source lists who may file: the importer directly, a customs broker assigned by the importer, or a service counter assigned by the importer, with a paper route still available. A company can register for e-Customs itself (digital certificate, software, a test of message exchange, then a registration ID) or go through an agent. Most importers, especially those without a trained customs team, use a broker. See Do You Need a Customs Broker? for how to decide.
What I could not confirm: an exact statutory deadline for filing the declaration after arrival. The official-style guides say the declaration is submitted when the cargo reaches the port or place of entry, and none states a day count. Ask your broker for the current rule at your port of entry. The Thai National Single Window (NSW) is a separate layer: it links the Customs Department with the permit-issuing agencies so licence approvals and the declaration can be handled through one electronic channel.
Who can be the importer?
The importer is the party named on the declaration and liable for duty and VAT. It needs a Thai tax identity and, to file electronically, e-Customs access directly or through a broker. A company without a Thai entity can often only import by using a local importer of record; Importer of Record Explained covers the liability that comes with that arrangement. Importers with a strong compliance record can apply for Authorized Economic Operator (AEO) status. Thai Customs-linked material describes lighter audits for AEO customs brokers and a requirement to have licensed, certified staff, but benefit details change, so check the Customs Department. The general idea is covered in AEO and C-TPAT Explained.
How is customs value worked out?
Thailand applies the WTO Customs Valuation Agreement, so the starting point is the transaction value: the price actually paid or payable, adjusted for items such as freight and insurance to the border, royalties and assists. If the transaction value cannot be used, the Act falls back to identical goods, similar goods and later methods, in the usual WTO order. In practice duty is assessed on the CIF value (cost, insurance and freight to the Thai port or airport). That is why the Incoterm on your sale matters: an FOB price needs the freight and insurance added before duty is calculated. A common misconception is that the commercial invoice value is always the customs value. It is only the starting point. See Customs Valuation Explained and Incoterms 2020 Explained.
What duty and taxes apply?
| Charge | Basis | Notes (as of November 2026) |
|---|---|---|
| Import duty | HS classification, usually ad valorem on CIF | The US Commercial Service reports ad valorem rates of 0% to 80%, and duty may be specific or ad valorem, "whichever is higher". Thailand uses a tariff nomenclature based on the 2022 Harmonized System. |
| Excise tax | Specified goods only | Applies to categories such as certain vehicles, fuels, alcohol, tobacco and luxury items. Rates and the base vary; confirm with the Excise Department. |
| VAT | CIF + import duty + excise + other taxes and fees | 7% reduced rate, extended by Royal Decree No. 807 for 1 October 2026 to 30 September 2027, covering imports. The statutory rate is 10%. |
The VAT base formula comes from the Board of Investment's VAT guidance. The 7% figure is a temporary reduction that has been renewed year by year, so confirm the rate on the Revenue Department site for any shipment arriving after September 2027.
Small parcels changed recently. Thai government reporting says that from 1 January 2026 Customs collects duty and VAT on goods sold online from as little as one baht, ending the old THB 1,500 duty exemption. If you ship small e-commerce consignments, do not assume an exemption.
Which trade agreements reduce Thai duty?
Thailand grants preferential rates under the ASEAN Trade in Goods Agreement (ATIGA), RCEP (origin paperwork accepted from 1 January 2022) and bilateral or ASEAN-plus agreements with partners including China, Japan, Korea, India, Australia and New Zealand. To claim a preference you generally need a valid origin certificate issued in the exporting country, such as Form D for ATIGA, which many ASEAN members can now exchange electronically through their single windows. The product must meet the rules of origin in the agreement; paying the preferential rate by mistake is a reassessment risk. Read Free Trade Agreement Certificates of Origin and Rules of Origin before you claim. Preferential duty is a saving only if the origin evidence is in the file when Customs asks.
Which goods need an import permit?
Most general merchandise needs no permit, but controlled goods need approval from the relevant agency, normally before the goods arrive. The US Commercial Service lists, for example, the Food and Drug Administration for processed foods, medical devices, pharmaceuticals, vitamins and cosmetics, the Department of Livestock Development for animal-derived products, the Ministry of Interior for arms and explosives, and the Fine Arts Department for antiques. Thailand's National Trade Repository also names the Department of Fisheries and the Department of Agriculture for inspections before release.
- Department of Foreign Trade (Ministry of Commerce): issues import licences and controls the lists of goods requiring them. Ask it, not your supplier, whether a product is on a list.
- FDA: food, drugs, cosmetics and medical devices typically need the importer to hold the right licence and product registration. Only a Thai-registered entity can hold the licence.
- TISI and NBTC: some electrical products, toys and radio or wireless devices are reported to need mandatory standards certification or type approval. This comes from broker and carrier sources, so confirm the current list on the TISI and NBTC sites.
- Plants and animals: see Phytosanitary Certificates and Plant Import Permits for the general permit logic.
A permit is tied to a specific importer, product and often a specific shipment. A supplier's certificate is not a substitute for it.
What are BOI, free zones and bonded warehouses?
Companies promoted by the Board of Investment (BOI) can receive exemption or reduction of import duty on machinery and on raw or essential materials, with the raw-material exemption tied to production for export. Machinery usually has to arrive within the period set in the promotion certificate (reported as 30 months), and the BOI form must be filed with the declaration. The detailed conditions are specific to each certificate, so treat this as a pointer, not a promise.
Bonded warehouses let goods sit under customs control before duty is paid. The US Commercial Service reports storage of up to 45 days without an import entry, or up to 60 days once an entry is submitted, with landing and storage charges payable before release. Free zones are designated by Customs and the Industrial Estate Authority of Thailand. The mechanics are similar to those described in Foreign Trade Zones vs Bonded Warehouses, but the Thai rules differ, so ask the operator for current conditions.
Where do Thai import clearances get delayed?
- HS classification disputes. The tariff code sets the duty, any permit and the preference. A code that differs from Customs' view can mean a red line, a reassessment or a dispute. Classify early using HS Codes Explained and keep the reasoning.
- Missing or late permits. Permits are meant to be in hand before arrival. A licence applied for after the ship docks means storage charges while you wait.
- Red-line inspections. The system flags shipments after the declaration is submitted, and there is no published list of what triggers it. Prepare the red-line paperwork for every shipment.
- Value and origin queries. Under-declared freight, unexplained related-party prices, or an origin certificate that does not match the goods all invite questions.
- Declaration and manifest mismatch. Because the system matches the declaration to the manifest, a wrong bill of lading number or arrival date stops the declaration number being issued.
What to do next
- Classify the goods and ask the Department of Foreign Trade and the relevant agency (FDA, TISI, NBTC and others) whether a permit or registration is needed.
- Decide who will be the importer, and whether you will use a customs broker or register for e-Customs yourself.
- Compute landed cost: CIF value, duty at the correct rate or FTA preference, any excise, and 7% VAT on the combined base.
- Collect the origin certificate, invoice, packing list, bill of lading or air waybill and permits before the cargo arrives, and keep copies for the full reassessment period.
For general background, see Customs Clearance Explained. If you are looking for a Thai forwarder or customs broker, more than 29,300 logistics companies are searchable by country and service in the CargoLinked directory, and the public requests board lists freight that shippers have posted for forwarders to quote on directly.
This guide is general information as of November 2026, not legal, tax or customs advice. Thai customs rules, rates and permit lists change; confirm the current requirements with the Thai Customs Department, the Revenue Department, the Department of Foreign Trade and the relevant permit agency, or with a licensed customs broker.
