PersonsNature of activitiesPersons making interstate suppliesAll persons who make interstate outward supplies have to mandatorily register. Note that exports and imports are also considered as interstate supplies.Persons making taxable supplies on behalf of other taxable personsExample: Agents, brokers, dealers, etc. who make taxable supplies on behalf of other taxable persons.Persons liable to pay tax on reverse chargeRead this blog post to know more about the supplies on which reverse charge is applicableCasual taxable persons

These are persons who occasionally undertake taxable transactions in a state where they do not have a fixed place of business. For example, sellers in exhibitions, trade fairs, circus business, etc.

Read more about casual taxable persons

Non-resident taxable persons

These are persons who reside outside India and occasionally undertake taxable transactions in India, where they do not have a fixed place of business or residence.

Read more about non-resident taxable persons

Input service distributors

An input service distributor is an office of a supplier of goods and/or services, which receives tax invoices for inward supply of services, and distributes input credit on these invoices to offices registered under the same PAN.

Read more about input service distributors

Persons liable to deduct TDS

Departments or establishments of the Central and State Governments, local authorities and governmental agencies are liable to deduct TDS on inward supplies.

As TDS rules have been deferred currently, mandatory registration is not applicable to these persons till the TDS rules are made applicable.

Persons making supplies through e-commerce operators

All persons making supplies through e-commerce operators should mandatorily register.

As TCS rules have been deferred currently, mandatory registration is not applicable to these persons till the TCS rules are made applicable.

E-commerce operators

An e-commerce operator is a person who owns, operates or manages a digital or electronic facility or platform for e-commerce.

As TCS rules have been deferred currently, mandatory registration is not applicable to these persons till the TCS rules are made applicable.

Persons supplying online information and database access or retrieval services from a place outside India to a person in IndiaFor example: Persons providing e-books, cloud services, online downloading of software, advertising space on a website, etc. from a place outside India to a person in India.