Indian e-commerce is among the fastest-growing markets globally (estimated USD 350+ billion GMV by 2030). But it is also one of the most regulated for foreign investors. Press Note 2 of 2018 hard-codes the distinction between marketplace e-commerce (100% FDI allowed under Automatic Route) and inventory-based e-commerce (no FDI permitted), with detailed conditions that constrain how foreign marketplaces structure seller relationships, related-party inventory, and platform pricing. Add Section 194-O TDS, GST TCS, the Digital Personal Data Protection Act 2023, and the still-evolving e-commerce policy, and the structuring choices made at incorporation have multi-year operational consequences.