GST Challenges in E-commerce

GST challenges in Indian e-commerce in 2026 include Section 52 TCS at 1 percent collected by e-commerce operators on net taxable supplies, Section 9(5) reverse charge where the operator pays GST on notified categories like restaurant and passenger transport services, mandatory GST registration for both operators and most sellers, multi-state nexus from cross-state warehouses, monthly GSTR-8 reconciliation, and emerging complexities in ONDC and cross-border D2C transactions including place of supply, valuation, and refund management.

Mayank Wadhera

Published: 7 May 2023

Updated: 16 May 2026

4 min read

E-commerce has been one of the most heavily watched verticals under GST since 2017, and 2026 brings fresh layers of complexity. With ONDC scaling, marketplace consolidation, cross-border D2C, social commerce, and quick commerce all sharing the regulatory canvas, GST compliance for online sellers, marketplaces, and aggregators demands sharp operational design. Section 52 TCS, Section 9(5) reverse-charge categories, and the steady stream of GST Council notifications keep e-commerce operators on a constant compliance treadmill.

Who Is an E-commerce Operator?

Under Section 2(45) of the CGST Act, an e-commerce operator (ECO) is any person who owns, operates, or manages a digital or electronic facility or platform for electronic commerce. The definition captures marketplaces (Amazon, Flipkart, Meesho), quick commerce (Blinkit, Zepto, Instamart), aggregators in specified categories (Ola, Uber, Urban Company), and increasingly the larger ONDC participants. The classification triggers TCS, mandatory registration, and additional reporting.

Key GST Challenges

Section 52 TCS at 1 percent on net taxable supplies made through the ECO; sellers claim TCS credit in their cash ledger.
Section 9(5) reverse charge on notified categories (restaurant services, transport of passengers, housekeeping services, accommodation by unregistered providers) where the ECO pays GST instead of the supplier.
Mandatory GST registration for ECOs and for sellers supplying through ECOs (with limited threshold relief for specified small unregistered service suppliers via composition-style schemes).
Multi-state nexus when sellers fulfil orders from FBA-style warehouses across states.
GSTR-8 monthly TCS return by the ECO, GSTR-1 and GSTR-3B by sellers, with reconciliation pressure.
Place of supply, time of supply, and OIDAR classification disputes for cross-border digital sales.

Marketplace vs. Inventory-Led Models

Indian FDI rules constrain marketplace operators with foreign investment from undertaking inventory-led B2C commerce. GST treatment differs sharply between the two models. Marketplace operators handle TCS and Section 9(5) obligations on third-party seller supplies, while inventory-led players (including most D2C brands selling directly) discharge their own output GST and manage state-wise registrations based on warehouse footprint.

Cross-Border and ONDC Layers

Cross-border D2C, exports under LUT, and dropshipping introduce questions on place of supply, valuation, and refunds. ONDC, with its decentralised buyer-seller-logistics architecture, raises issues around which participant is the ECO for TCS purposes, how invoices are split, and how returns and refunds flow. GST Council clarifications have provided guidance, but execution still demands tight ERP-GSTN integration.

Practical Compliance Architecture

E-commerce sellers should automate GSTR-1 generation from order data, reconcile GSTR-8 TCS credits monthly with GSTR-2B, maintain state-wise registrations based on warehouse and fulfilment patterns, track Section 9(5) categories that flip RCM liability to the ECO, and document export and SEZ supplies with shipping bills and BRCs. ECOs should publish a clear seller-onboarding KYC and GSTIN-validation workflow to avoid liability for unregistered sellers.

Returns, Refunds, and Reversal Mechanics

E-commerce sees a high volume of returns and cancellations, which complicates GST treatment. When a buyer returns a product after invoicing, the seller must issue a credit note within the timeline prescribed under Section 34, reverse the GST output liability, and reconcile the Section 52 TCS already deducted. The TCS already remitted by the operator is adjustable against future liabilities. Building automated workflows that link return events to credit notes and ledger adjustments prevents the most common reconciliation gap that arises in high-volume marketplaces.

Audit Triggers for E-commerce Sellers

E-commerce sellers face higher audit incidence than offline businesses because their data is highly digital and reconcilable. Common audit triggers include mismatches between GSTR-1, GSTR-3B, and GSTR-8 TCS data; ITC claimed on supplier invoices that supplier did not upload (GSTR-2B mismatch); persistent classification of supplies under lower HSN rates than appropriate; and missing shipping bill reconciliation for exports. Conducting an internal half-yearly reconciliation pulling marketplace settlement data against ledgers and GST returns avoids the worst of these triggers.

ONDC and the Decentralised Future

The Open Network for Digital Commerce (ONDC) is restructuring how e-commerce works in India by decoupling buyer apps, seller apps, and logistics providers. GST treatment in an ONDC transaction depends on which participant is classified as the e-commerce operator for Section 52 TCS and Section 9(5) purposes. GST Council clarifications have provided guidance on multi-participant transactions, but the practical implementation requires careful contractual structuring between participants. Sellers and operators on ONDC should obtain advance rulings or rely on documented professional opinions on the GST treatment of their specific role in the network.

Conclusion

GST challenges in e-commerce in 2026 are less about ambiguity and more about operational discipline. The framework is largely settled, but the volume of transactions, multi-state nexus, and shifting Section 9(5) categories mean that small process gaps create large compliance liabilities. Build the architecture early, automate reconciliations, and stay current with GST Council updates.

Frequently Asked Questions

What is Section 52 TCS in GST?

Section 52 of the CGST Act requires every e-commerce operator to collect tax at source at 1 percent on the net value of taxable supplies made through its platform by other suppliers, where consideration is collected by the operator. The collected TCS is deposited monthly and reported in GSTR-8, and sellers claim it as a credit in their electronic cash ledger.

Which services attract Section 9(5) reverse charge?

Section 9(5) of the CGST Act notifies categories where the e-commerce operator pays GST instead of the actual supplier. These include passenger transport (Ola, Uber), restaurant services (Zomato, Swiggy), housekeeping services (Urban Company, where applicable), and accommodation services supplied by unregistered providers. The ECO discharges output GST and reports it in its own returns.

Is GST registration mandatory for small sellers on e-commerce platforms?

GST registration is mandatory for sellers supplying goods through e-commerce platforms in most cases. A limited relaxation introduced via specific notifications allows certain small unregistered service suppliers to operate through ECOs under prescribed conditions. The general rule remains that aggregate turnover-based exemptions do not apply to e-commerce sellers.

How is GST applied on cross-border e-commerce exports?

Exports of goods or services by Indian e-commerce sellers qualify as zero-rated supplies. Sellers can either supply under a Letter of Undertaking (LUT) without payment of IGST and claim refund of accumulated input tax credit, or pay IGST and claim refund of the tax paid. Shipping bills, FIRCs, BRCs, and proper export documentation are essential for refund processing.