GST for E-commerce Sellers: Complete Compliance Guide 2026

Who Counts as an E-commerce Seller Under GST

Under the CGST Act, two distinct roles exist. An e-commerce operator (ECO) is the entity that owns and manages the digital platform, such as Amazon, Flipkart, or Meesho. An e-commerce seller (or supplier) is the business that lists and sells goods or services through that platform. Section 2(45) defines the ECO, while Section 52 governs the TCS obligation it carries. If you sell your products through any such marketplace, you are an e-commerce supplier and special rules apply to you that do not apply to ordinary offline traders.

Registration Rules for E-commerce Sellers

This is where most confusion arises. The general threshold of Rs 40 lakh (goods) or Rs 20 lakh (services) does not apply uniformly to e-commerce sellers.

• Sellers of goods through an ECO: As per amendments effective from 2023, suppliers of goods through an ECO can avail an exemption from compulsory registration if their aggregate turnover is below the threshold and they sell only intra-state, subject to conditions and obtaining an enrolment number. However, in practice most marketplaces still require a GSTIN to onboard sellers, so the majority register regardless.
• Inter-state sellers: If you sell goods to customers in other states through a marketplace, registration is generally mandatory irrespective of turnover.
• Sellers of services through an ECO: Service suppliers below the Rs 20 lakh threshold are not compelled to register merely because they sell through a platform, except for notified services under Section 9(5).

If you sell through your own website (not a third-party marketplace), you are treated as a normal supplier and the regular thresholds apply.

Understanding TCS Under Section 52

The single biggest difference for online sellers is Tax Collected at Source. Every ECO must collect TCS at 0.5% CGST + 0.5% SGST (total 1%) for intra-state supplies, or 1% IGST for inter-state supplies, on the net taxable value of goods and services sold through it.

How TCS Works in Practice

The ECO deducts TCS on the net value of taxable supplies after adjusting for returns. It deposits this with the government by the 10th of the following month and files Form GSTR-8. The TCS amount then reflects in your Electronic Cash Ledger and can be claimed.

Example: Suppose Priya runs an apparel store on Flipkart and sells goods worth Rs 5,00,000 in a month, with Rs 50,000 worth of returns. The net value is Rs 4,50,000. Flipkart collects 1% TCS = Rs 4,500 (split as Rs 2,250 CGST and Rs 2,250 SGST for intra-state sales). This Rs 4,500 appears in Priya's cash ledger, and she can use it to offset her output tax liability.

Claiming TCS Credit

The TCS collected by the ECO auto-populates in Form GSTR-2A/2B and a TCS statement. The seller must accept it, after which the credit moves to the cash ledger. You should reconcile the TCS figure shown by the marketplace against what appears on the GST portal every month, because mismatches are common.

GST Returns for E-commerce Sellers

As a registered e-commerce seller you have the same core return obligations as other taxpayers, plus the TCS reconciliation layer.

GSTR-1 and GSTR-3B

• GSTR-1: Report all outward supplies. Sales through e-commerce operators must be reported correctly, including details required for supplies made through an ECO. The monthly or quarterly (QRMP) frequency depends on your turnover.
• GSTR-3B: Summary return where you declare output liability and claim input tax credit, and pay any balance tax. The TCS credit sitting in your cash ledger reduces the actual cash you need to pay.

Reconciliation with GSTR-8

The ECO files GSTR-8 reporting the supplies it facilitated and the TCS collected. Your reported sales in GSTR-1 should broadly match the gross value the marketplace reports. Departmental scrutiny often flags sellers whose GSTR-1 turnover is lower than the value reported by the ECO in GSTR-8.

Input Tax Credit for Online Sellers

E-commerce sellers can claim ITC under Section 16 on purchases of inventory, packaging, marketplace commission, logistics, advertising, and software subscriptions, provided the supplier has uploaded the invoice and it appears in GSTR-2B. Note that marketplaces charge GST on their commission, closing fees, shipping fees, and advertising services, and this GST is fully creditable.

Example: If Amazon charges Rs 10,000 commission plus Rs 1,800 GST, that Rs 1,800 is ITC you can claim against your output liability. Many sellers overlook this and effectively pay tax twice.

Remember Rule 36(4) requires that ITC can generally be claimed only to the extent it appears in GSTR-2B. Always download the monthly tax invoice for fees from your seller dashboard.

Section 9(5): When the Platform Pays GST For You

For certain notified services, the ECO itself is liable to pay GST as if it were the supplier. This includes passenger transport (cab aggregators), restaurant services supplied through platforms like Zomato and Swiggy, and accommodation and housekeeping services through platforms. If you supply such services, the platform discharges the GST, and you do not charge it separately, though registration nuances still apply. Sellers of physical goods are not covered by Section 9(5).

E-way Bills and Logistics

When the consignment value exceeds Rs 50,000, an e-way bill is required for movement of goods. In marketplace fulfilment models (like Amazon FBA), the logistics partner often generates the e-way bill, but ownership of compliance still rests with the registered supplier. If you use your own GSTIN for stock transfers to a fulfilment warehouse in another state, you may need additional registration in that state.

Common Mistakes to Avoid

1. Not Reconciling TCS Every Month

Sellers frequently forget that TCS credit must be reconciled and accepted. Unclaimed TCS simply sits idle in the cash ledger or gets missed entirely. Reconcile the marketplace TCS report against GSTR-2B monthly.

2. Under-reporting Sales in GSTR-1

Reporting net sales (after commission) instead of gross taxable value is a frequent error. Your GSTR-1 must reflect the full invoice value to the customer; commission is a separate expense, not a deduction from turnover.

3. Ignoring ITC on Marketplace Fees

Commission, advertising, and shipping fees carry GST that is fully creditable. Failing to claim this inflates your effective tax cost significantly over a year.

4. Wrong Place of Supply

E-commerce is inherently inter-state. Charging CGST+SGST on a sale shipped to another state instead of IGST creates mismatches and refund headaches. Always determine place of supply based on the delivery address.

5. Treating Returns Incorrectly

When a customer returns goods, the value must be adjusted through credit notes and reflected correctly. Many sellers fail to issue credit notes, leading to over-payment of tax.

6. Assuming the Composition Scheme Applies

Suppliers selling through an ECO are not eligible for the composition scheme under Section 10. Some new sellers mistakenly opt in and later face penalties.

Practical Compliance Checklist

• Obtain GST registration before onboarding to a marketplace.
• Download monthly TCS and commission tax invoices from your seller dashboard.
• File GSTR-1 and GSTR-3B on time, reconciling with GSTR-8 and GSTR-2B.
• Maintain separate records for each marketplace and state.
• Issue credit notes promptly for returns.
• Use accounting or reconciliation software to automate sales-versus-TCS matching, especially if you sell across multiple platforms.

Staying disciplined with monthly reconciliation is the single most valuable habit for an online seller. The marketplaces report your data to the department independently, so any gap in your own filings becomes visible quickly. Build a simple monthly routine and e-commerce GST compliance becomes entirely manageable.