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For HS 620342 (men’s/boys’ cotton trousers & shorts, not knit) shipped from India to Sri Lanka:

Duty in Sri Lanka

• Import duty: 0.0% MFN (applied) for this HS code, per the routed duty engine.
• That means the shipment is currently duty-free on the customs tariff line.
• Note: Sri Lanka may still assess other import charges/taxes or regulatory fees depending on the shipment and importer status, even when basic customs duty is zero.

India export benefit

• RoDTEP benefit: 4.3% of FOB for India exports of this product category, per the routed engine.
• This is an export incentive for the Indian exporter, not a discount on the Sri Lanka import duty.

Documents you should prepare

For this lane, the core export/import set is:

• Commercial Invoice
• Packing List
• Bill of Lading / Air Waybill
• Certificate of Origin
• FTA certificate, if claiming any preferential treatment under a relevant trade arrangement
• Insurance certificate
• Export inspection / quality documents, if required by buyer or cargo type
• LC documents, if payment is via Letter of Credit

India-side compliance

• IEC (Import Export Code) – mandatory for exporting from India
• GST registration – needed for most exporters and for GST refund/zero-rated export handling
• RCMC – useful/required to claim certain DGFT export incentives like RoDTEP
• Customs filing via ICEGATE

Practical point for this route

Because the Sri Lanka duty is currently 0%, the main commercial value usually comes from:

• correct HS classification
• proving origin
• clean invoice/packing list matching
• ensuring the buyer’s import filing in Sri Lanka is complete

If you want, I can also give you a shipment-ready document checklist for this exact India → Sri Lanka apparel export, or a profit estimate using your FOB value.