HS Code 8421.23 : Filtering or purifying machinery and apparatus for liquids, Oil or fuel filters for internal combustion engines
MODULE 2: EXTRACTABLE ANSWER (AEO / SPEAKABLE)
EN (Official WCO)
FR (Pending)
ES (Pending)
The 6-digit Harmonized System (HS) code for filtering or purifying machinery and apparatus for liquids, oil or fuel filters for internal combustion engines is 8421.23. Under the 2026 Thailand (Thai Customs), the representative MFN general duty rate is 8.3% [Thai Customs Department].
MODULE 3: SIGNATURE A: HS DECODE VISUAL HIERARCHY
Chapter 84
Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof
Heading 8421
Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof
Subheading .23
.23
Filtering or purifying machinery and apparatus for liquids, Oil or fuel filters for internal combustion engines
MODULE 4: SIGNATURE B: TARIFF MATRIX
Import Duty Rates by Destination
Thailand (Thai Customs Tariff 2026)
8421.23.00.00
MODULE 5: THAILAND IMPORT DUTY & TAX BREAKDOWN
Customs Duty (อากรขาเข้า)
8.3%
WTO MFN Rate
Import VAT
7.00 %
CIF + Duty Base
TRACK THIS HS CODE
Get Real-Time Tariff & Trade Remedy Change Alerts for HS 8421.23
Receive an automated email notification whenever USITC or CBP publishes duty rate adjustments or customs notices for 8421.23.
MODULE 6: Mandatory Customs Entry Document Matrix
Rule-Derived Customs Entry Package Checklist
UNIVERSAL DOCUMENT
Commercial Invoice
Itemized description, currency, Incoterms, seller/buyer details, and country of origin.
UNIVERSAL DOCUMENT
Packing List & Bill of Lading
Gross/net weight, container/seal numbers, piece count, and transport B/L or Air Waybill.
PREFERENTIAL RULE
Certificate of Origin (If Claiming FTA)
Required only when claiming zero-duty preference under USMCA, KORUS, or GSP.
MODULE 7: Regulatory Compliance & Partner Government Agency (PGA) Flags
Standard Entry
This commodity does not carry mandatory PGA pre-clearance flags under the ACE message set.
MODULE 8: Trade Remedies (Section 301, Section 232, AD/CVD)
China Section 301 Tariff Status
7.5% – 25% Additional Duty (China Origin)
Section 232 Steel/Aluminum Status
Exempt (Non-Metal Commodity)
EU CBAM Carbon Alert
Not in Scope
MODULE 9: Free Trade Agreements (FTA) & Rules of Origin (RoO)
| Agreement Code | Trade Agreement / Program | Preferential Rate | Rules of Origin (RoO) Requirement |
|---|---|---|---|
| P | United States-Mexico-Canada Agreement (USMCA) | Free | Must meet USMCA Regional Value Content (RVC) or tariff shift rules. |
| KR | U.S.-Korea Free Trade Agreement (KORUS) | Free | Direct shipment from South Korea with KORUS Certificate of Origin. |
| AU | U.S.-Australia Free Trade Agreement | Free | Wholly obtained or tariff shift rule under US-Australia FTA. |
| A / D | GSP / African Growth & Opportunity Act (AGOA) | Free | 35% local value-add requirement for beneficiary country origin. |
MODULE 10: Logistics, Freight & Transport Specifications
Standard 20ft Container
~28 CBM / 28,000 kg Payload
Standard 40ft High-Cube
~68 CBM / 28,600 kg Payload
Stowage Factor & Handling
Standard commercial packaging for Filtering or purifying machinery and apparatus for liquids, Oil or fuel filters for internal combustion engines
MODULE 11: Thai Customs Advance Tariff Ruling
Legally binding advance classification rulings issued by Thai Customs Department for HS 8421.23.
Query official Thai Customs portal:
Search Official Thai Customs Portal for 8421.23 →Thailand Declarable Tariff Items (8421.23)
National line-level (8/10-digit) detail for Thailand (Thai Customs): coverage in progress.
Universal 6-digit WCO backbone applied rate: 8.3%. Confirm the full national commodity code at the official source (Thai Customs Department).
MODULE 12: Candidate Subheadings & Related Codes
| Related HS Code | Heading Category | Action |
|---|---|---|
| 8421.11 | Subheading under Heading 8421 | Compare Subheading 8421.11 → |
| 8421.12 | Subheading under Heading 8421 | Compare Subheading 8421.12 → |
| 8421.19 | Subheading under Heading 8421 | Compare Subheading 8421.19 → |
| 8421.21 | Subheading under Heading 8421 | Compare Subheading 8421.21 → |
| 8421.22 | Subheading under Heading 8421 | Compare Subheading 8421.22 → |
| 8421.29 | Subheading under Heading 8421 | Compare Subheading 8421.29 → |
| 8421.31 | Subheading under Heading 8421 | Compare Subheading 8421.31 → |
| 8421.32 | Subheading under Heading 8421 | Compare Subheading 8421.32 → |
Official Primary Sources & Authority References
Thai Customs Department ↗
Official Thai customs tariff schedule and general duty (อากรขาเข้า) rates.
Thai Customs Advance Tariff Ruling System ↗
Thai Customs Department binding advance tariff classification rulings database.
MODULE 14: Frequently Asked Questions (FAQ) & Operational Guide
What is the 6-digit WCO tariff classification and Thailand (Thai Customs) general duty for Filtering or purifying machinery and apparatus for liquids, Oil or fuel filters for internal combustion engines?
Under WCO Harmonized System 2022 and Thailand (Thai Customs), Filtering or purifying machinery and apparatus for liquids, Oil or fuel filters for internal combustion engines is classified under HS 8421.23 (Heading 8421, Chapter 84). The representative TH MFN general duty rate is 8.3%.
How is HS 8421.23 distinguished within Heading 8421 (Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof)?
Heading 8421 covers Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof. Subheading 8421.23 specifically isolates Filtering or purifying machinery and apparatus for liquids, Oil or fuel filters for internal combustion engines. Importers must verify whether physical characteristics, processing state, or composition require alternative subheadings under Heading 8421.
What are the primary candidate subheadings related to HS 8421.23?
Related subheadings under Heading 8421 include 8421.11, 8421.12, 8421.19, 8421.21, 8421.22, 8421.29, 8421.31, 8421.32. Classification depends on processing stage, decaffeination, purity, or material form.
What mandatory commercial entry documents are required to import Filtering or purifying machinery and apparatus for liquids, Oil or fuel filters for internal combustion engines?
Commercial Invoice (detailing Incoterms, currency, and origin), Packing List, Bill of Lading (or Air Waybill), CBP Form 7501 Entry Summary, and a continuous customs bond are required for formal entries.
Can goods under HS 8421.23 enter duty-free under USMCA or Free Trade Agreements?
Yes. Eligible goods originating in Mexico, Canada, South Korea, or Australia enter duty-free under preference SPI codes (P, KR, AU) provided they satisfy Regional Value Content (RVC) or tariff-shift rules with a valid Certificate of Origin.
What is the US formal entry threshold for shipments of Filtering or purifying machinery and apparatus for liquids, Oil or fuel filters for internal combustion engines?
Commercial shipments of Filtering or purifying machinery and apparatus for liquids, Oil or fuel filters for internal combustion engines with a customs value exceeding $2,500 USD require formal customs entry (CBP Form 7501) and a continuous entry bond. Informal entry applies to lower values.
How can an importer obtain a binding CBP classification ruling for HS 8421.23?
Importers may submit an e-Ruling request under 19 CFR Part 177 to CBP National Commodity Specialist Division (NCSD) to obtain a legally binding tariff classification ruling prior to importation.
What is the import VAT rate for HS 8421.23 in Thailand?
Thailand assesses a standard 7% Value-Added Tax (VAT) on imports, calculated on CIF value + statutory customs duty (อากรขาเข้า).
What is Thailand's de minimis duty-free threshold?
Thailand's de minimis threshold for express parcel imports is THB 1,500 total CIF value. Consignments under this threshold enter duty-free and tax-free.
Which agency regulates customs clearance and advance rulings in Thailand?
Customs declarations and binding advance tariff classification rulings are administered by the Thai Customs Department.
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