In India, custom duty is primarily calculated on the Assessable Value (AV) of imported goods, which is the CIF value (Cost, Insurance, and Freight) plus a 1% landing charge. The calculation follows a specific sequence:
- Basic Customs Duty (BCD): Calculated as a percentage of the AV based on the item's HSN code.
- Social Welfare Surcharge (SWS): Usually 10% of the BCD amount.
- Integrated Goods and Services Tax (IGST): Calculated on the cumulative value (AV + BCD + SWS).
The total duty is the sum of BCD, SWS, and IGST.