I am a registerd dealer under GST. I am doing business on rental in residential building of a unregistered person. Shall I Pay RCM on rent amount ?

The full form of RCM is Reverse Charge Mechanism. It is given under the Goods and Services Tax (GST) regime in India. RCM is applicable when a registered person (the recipient of goods or services) is required to pay the tax directly to the government instead of the supplier. It is applicable in the cases, of specified services received from an unregistered supplier.

As the answer to your question, if you are a registered GST dealer and you are receiving rental income from a residential building owned by an unregistered person, RCM may not apply to your rental income. Rental income from residential properties is usually exempt from GST, whether the owner is registered or unregistered, provided certain conditions are met. This exemption falls under Notification No. 12/2017 - Central Tax (Rate).