TCS under GST: E‑commerce Guide to Tax Collected at Source

TCS under GST is the tax an e-commerce operator must collect from suppliers on the net taxable value of supplies made through its platform and deposit with the government. The provision came into effect on 1 October 2018 and requires the operator to collect specified percentage of net taxable supplies made through the platform, issue details in a return, and enable suppliers to claim input tax credit of the collected amount. TCS is separate from the supplier’s own output tax liability and is reflected in the supplier’s auto-populated purchase statement so the supplier can reconcile and claim credit. Non-compliance by the operator can attract interest and penalties under GST law.

Any e-commerce operator who facilitates the supply of goods or services through its electronic platform is required to collect TCS under GST. This liability applies to operators registered as e-commerce operators under GST rules, irrespective of their aggregate turnover, and includes both marketplace operators and platforms that facilitate supplies. The operator must collect TCS on taxable supplies made through the platform by third-party sellers and deposit the amount with the government. Exemptions or special cases (for example supplies by the operator itself) should be checked against the GST law and notifications.

The obligation to collect TCS arises at the time of receipt of the payment from the buyer or at the time of credit of proceeds to the supplier, whichever is earlier, for supplies made through the operator’s platform. Practically this means TCS must be collected when consideration for a taxable supply is received or becomes payable through the platform, ensuring collection even when payment and settlement timings differ. The operator must reflect these collections in its TCS return for the month in which collection occurred and deposit the amount by the prescribed due date. Operators should maintain clear payment and settlement records to determine the exact point when TCS is due.

TCS under GST is collected at the rate notified in the GST law for supplies made through e-commerce operators, commonly implemented as 1% of the net taxable value (split as 0.5% CGST and 0.5% SGST for intra-state supplies) or the applicable IGST rate for inter-state supplies. The exact rate and the tax head (CGST+SGST or IGST) depend on whether the supply is intra-state or inter-state and any specific government notifications. Operators should apply the notified percentage on the net taxable value of supplies after adjusting for taxes, discounts and returns as required, and keep updated with notifications that may amend rates. Sellers should reconcile the TCS recorded by the operator with their own tax liabilities since TCS is creditable to the supplier.

Yes, e-commerce operators must be registered under GST as e-commerce operators and typically need to obtain GST registration even if their aggregate turnover is below the normal registration threshold. The GST rules specifically require e-commerce operators to register in every state where they are required to collect TCS and facilitate supplies, and registration enables them to file the mandatory TCS return (GSTR-8). Operators should obtain GSTINs for each state as required and ensure their registration status is up to date to comply with TCS obligations. Failure to register or to collect TCS when required may attract penalties and interest.

TCS collected by an e-commerce operator must be deposited with the government by the 10th day of the month following the month in which the tax was collected. The operator is also required to file the monthly TCS return (GSTR-8) by the same due date, reporting details of supplies, TCS collected and the suppliers to whom credit will be made available. Late deposit or late filing attracts interest and possible penalties, so operators should reconcile collections and deposits before the 10th of the next month. Operators must ensure timely deposit to ensure suppliers can claim credit in their returns without delay.

TCS is to be computed on the net taxable value of supplies made through the e-commerce operator after adjusting for discounts, returns and taxes as prescribed under GST rules. Net taxable value means the aggregate value of taxable supplies facilitated through the platform minus taxable refunds and adjustments for the relevant period; the specified TCS rate is applied on this net value. Operators must maintain detailed ledgers showing gross supplies, taxes, discounts and returns to arrive at the correct net taxable value for each supplier and for the platform as a whole. Accurate computation is essential because incorrect calculation can lead to disputes, interest and penalties and can affect the supplier’s ability to claim input tax credit.

E-commerce operators must file the monthly TCS return in GSTR-8 to report supplies made through their platform, details of sellers, and the TCS collected and deposited for the month. GSTR-8 contains line items for each supplier’s supplies and the tax collected, and these details are used to auto-populate the suppliers’ purchase statements so they can claim credit. The return is generally filed monthly and the due date aligns with the TCS deposit due date (typically the 10th of the month following the collection month); late filing attracts interest and penalties. Operators should ensure their invoicing and settlement data are reconciled before filing GSTR-8 to avoid mismatches for suppliers.

Sellers can view the TCS details reported by e-commerce operators in their auto-populated purchase statement (GSTR-2A/GSTR-2B) and claim input tax credit for the TCS amount shown, provided the transaction is reflected correctly and invoices are available. The TCS reported in GSTR-8 is credited to the corresponding supplier’s electronic ledger, which the supplier should reconcile with their own sales and invoice records before claiming credit in their return (GSTR-3B). Any mismatch between the operator’s reported data and the supplier’s books should be resolved with the operator promptly to ensure the supplier can legitimately claim the credit. Suppliers must retain supporting invoices and reconcile monthly to prevent denial of credit due to discrepancies.

E-invoicing may streamline TCS collection and reporting but does not change the fundamental obligation of e-commerce operators to collect and deposit TCS under GST. Where e-invoicing is applicable, invoice-level data becomes electronically available and can help operators accurately compute net taxable supplies, reconcile transactions, and populate GSTR-8 with correct details, reducing mismatches for sellers. However, the requirement to collect the prescribed TCS percentage, deposit it by the due date and file GSTR-8 remains unchanged; e-invoicing only improves data quality and traceability. Operators and sellers should align their invoicing and settlement processes with e-invoicing mandates to ensure smooth credit flow and compliance.

TCS provisions increase compliance for e-commerce operators and affect cash flow and reconciliation for sellers, but they also create a transparent trail that helps suppliers claim input tax credit for tax collected on their supplies. Operators must implement systems to collect, deposit and report TCS monthly (via GSTR-8) and reconcile settlements with multiple sellers, while sellers must monitor GSTR-2A/GSTR-2B to ensure TCS credit is reflected correctly and resolve mismatches quickly. For sellers, TCS does not replace their output tax liability but provides a credit recorded by the operator; therefore accurate record-keeping, timely reconciliation and communication between sellers and operators are critical to avoid blocking of credits or disputes. Overall, TCS improves tax collection oversight but adds administrative tasks and potential short-term cash-flow timing differences for marketplace sellers.