What turnover limit requires GST registration for a small business?

For a business supplying only services, registration is generally required once aggregate turnover crosses Rs 20 lakh in a financial year (Rs 10 lakh in most special category states). For suppliers of goods the limit is Rs 40 lakh in most states, with some states and special category states at Rs 20 lakh or Rs 10 lakh.

Registration is mandatory regardless of turnover in some cases, such as inter-state supply of goods and e-commerce sellers. Check your situation with your CA, and the thresholds on the GST portal.