The Authority of Advanced Ruling (AAR) for the goods and services tax (GST) has ruled that firms supplying food and beverages to canteens of other organisations are ‘outdoor caterers’ and the service would attract an 18% GST.
The ruling was delivered by Gujarat AAR on an application filed by Rashmi Hospitality Services. The firm is engaged in supplying food, beverages and other eatables at various places of their customers having in-house canteens at their factories. The authority said the assessee provides services from other than its own premises to the recipient. So, the nature of service provided by the applicant is that of an outdoor catering service.

Source - https://www.financialexpress.com