GST Registration Checker: Do You Need to Register for GST?

Key takeaways

• The GST turnover limit depends on what you supply (goods, services, or both) and whether you are in a normal or special-category state.
• Inter-state goods suppliers, e-commerce sellers, RCM-liable persons, casual taxable persons and NRTPs must register from day one — turnover does not matter.
• Voluntary registration unlocks Input Tax Credit, B2B sales and e-commerce listings.
• Aadhaar-authenticated applicants can get GSTIN in 3 working days under Rule 14A (effective 1 Nov 2025).

What is the GST registration turnover limit?

"Aggregate turnover" is computed across all branches and verticals operating under the same PAN, on an all-India basis.

Who must register regardless of turnover?

Section 24 of the CGST Act lists categories that must register from the first rupee of supply:

• Inter-state suppliers of taxable goods (services have a notified exemption up to Rs 20 lakh)
• E-commerce sellers and e-commerce operators required to collect TCS
• Persons required to pay tax under reverse charge
• Casual taxable persons and non-resident taxable persons
• Input Service Distributors, TDS deductors, and agents supplying on behalf of others

What happens if you don't register?

Operating without registration when you are required to attracts a penalty of Rs 10,000 or 10% of the tax due (whichever is higher), and up to 100% of the tax due in evasion cases. You also cannot legally collect GST from customers, cannot claim Input Tax Credit, and risk having your bank accounts and assets attached during recovery proceedings.

Should you register voluntarily?

Voluntary registration is worth considering if your buyers are GST-registered businesses (they expect a GSTIN to claim ITC), if you sell on platforms like Amazon/Flipkart, if you export services (LUT route, zero-rated supply with ITC refund), or if your inputs carry significant GST you would otherwise sink as cost. The trade-off is monthly/quarterly return filing and compliance discipline.