CAAR Mumbai on CKD Motherboard Kits: Why They Cannot Be Classified as ‘Motherboards’ Under CTH 8473 30 20

Background and Context

Smile Electronics Limited approached the Customs Authority for Advance Rulings, Mumbai (CAAR) seeking clarity on the customs classification of Completely Knocked Down (CKD) kits of motherboards proposed to be imported. The advance ruling application was filed on 13.01.2026 under Section 28H(1) of the Customs Act, 1962.

The assessee is engaged in Electronic Manufacturing Services (EMS) and plans to import all critical components required to manufacture motherboards in CKD form. These components would be assembled, tested and finished at its facility in Bengaluru to produce fully functional motherboards.

The central legal issue was:

Whether CKD kits containing all essential parts for manufacturing motherboards can be classified as “motherboards” under CTH 8473 30 20 of the First Schedule to the Customs Tariff Act, 1975, by invoking Rule 2(a) of the General Rules for Interpretation (GIR).

CAAR Mumbai rejected this classification claim and held that the CKD kits do not qualify as “motherboards” for customs purposes and must instead be classified individually under their respective headings.

Facts Presented by the Applicant

Nature of Business and Proposed Imports

  • The assessee, M/s Smile Electronics Limited, is an EMS provider with GSTIN 29AACCS8765R1Z7.
  • It proposes to import CKD kits comprising all essential electrical and mechanical components required to manufacture a variety of motherboards.
  • Assembly and manufacturing will be carried out at the assessee’s facility located at Plot No. 22, SY No. 205, Hitech Defense and Aero Space Park, Mahadevakodigehalli Village, Bengaluru Urban, Karnataka, 562149, India (illustrative address rephrased).

Composition of CKD Kits and Manufacturing Flow

Each kit would contain, inter alia:

  • A bare printed circuit board (PCB)
  • Electronic components:
    • Integrated circuits (ICs)
    • Processors / chipsets
    • Transistors, MOSFETs, diodes
    • Capacitors, resistors, thermistors, inductors
    • Crystals, ferrite beads
  • Electromechanical components:
    • Connectors, headers, sockets, jumpers
    • Heat sinks, metal fittings
    • Socket assemblies / I/O plates
    • Screws and similar fittings

The assessee emphasised that:

  • The number of kits imported will equal the number of motherboards to be manufactured.
  • Only consumables (like soldering materials) and packing materials will be sourced domestically.
  • All kits will be imported as single consignments from a single foreign supplier, although the supplier may source individual components from different brands or manufacturers.

The manufacturing process, as described and supported by a flow chart, includes:

  1. Inward inspection and verification of components
  2. Storage and kitting
  3. Solder paste preparation and printing
  4. SMT machine programming and component loading
  5. Automated component placement on PCBs
  6. Reflow soldering and wave soldering
  7. Manual insertion of certain parts
  8. Mechanical assembly of heatsinks, sockets, jumpers, etc.
  9. Optical and visual inspections
  10. Rework and corrective actions
  11. Functional testing and calibration