GST Registration for E-Commerce Sellers: Mandatory Regardless of Turnover

The single biggest GST surprise for new e-commerce sellers is that the usual ₹40 lakh (goods) or ₹20 lakh (services) threshold exemption simply doesn't apply to them — registration is mandatory from the very first sale through a marketplace.

Why the Threshold Exemption Doesn't Apply

Suppliers making sales through an e-commerce operator that's required to collect Tax Collected at Source (TCS) — this covers virtually all major marketplaces — must register for GST regardless of turnover, under a specific provision that overrides the general threshold rule. A seller doing ₹2 lakh a year on Amazon still needs a GSTIN; a similarly-sized business selling only offline to local customers might not.

Understanding TCS (Tax Collected at Source)

The marketplace deducts 1% TCS (0.5% CGST + 0.5% SGST for intra-state, or 1% IGST for inter-state) from the payment due to you on each sale, and deposits it against your GSTIN. This isn't an additional cost to you in the way GST charged to a customer is — it's collected against the sale price already agreed, and shows up as a credit in your electronic cash ledger, usable to offset your own GST liability.

Registration Steps Specific to E-Commerce Sellers

1. Register for GST as normal (PAN, Aadhaar, business address, bank account) — the process itself is the same as any other GST registration
2. Provide your GSTIN to the marketplace(s) you sell on before or when onboarding as a seller — most platforms won't let you list without one
3. Ensure your HSN codes for listed products are correctly classified, since this determines the GST rate charged to end customers
4. Set up monthly reconciliation between your sales records, the TCS reflected in your electronic cash ledger, and the marketplace's GSTR-8 filing

Reconciling TCS — Where Sellers Commonly Lose Money

TCS credited to your ledger should match 1% of your net taxable sales through that platform for the period. Mismatches happen when a marketplace's GSTR-8 reporting lags, or when returns/refunds reduce your actual sale value after TCS was already calculated on the gross amount — reconciling this monthly (rather than assuming the credit is automatically correct) is what catches these before they become an unclaimed credit sitting unused.

Multi-State Selling and Warehousing

Sellers using a marketplace's fulfillment warehouses in multiple states (like Amazon FBA-equivalent programs) may need GST registration in each state where stock is warehoused, not just their home state — this is a separate consideration from the TCS/threshold rule above and is often the second surprise for sellers scaling across a marketplace's multi-warehouse network.

If you're setting up as a new marketplace seller or expanding into multi-warehouse fulfillment, it's worth getting the registration scope right from the start rather than fixing it after listings are already live. Our GST registration service can confirm exactly which states you need registration in based on your specific fulfillment setup.