Is it legal to sell products online without a GST number?

No. In India, GST registration is mandatory for all online sellers, especially on platforms like Amazon and Flipkart, since e-commerce operators must collect and remit GST.

Unlike offline businesses, the usual exemption thresholds (₹40 lakh turnover, or ₹20 lakh in special states) don’t apply to online sellers. Limited exceptions exist for those dealing in non-taxable goods.

Without GST, sellers can’t legally issue invoices, collect taxes, or operate on major e-commerce sites. Doing so may attract penalties and even restrictions on their business.