The Tax Rate for Regular Scheme in case of Restaurant Business is 5% without the benefit of ITC. However, if the Restaurant is in a Hotel where the Declared Tariff is Rs. 7,500 or more per day, then you are required to collect 18% with the benefit of ITC.
The person who have opted to pay GST under Section 10 of the CGST Act 2017 i.e. Composition Scheme are also required to pay GST @ 5% out of their own pocket. The ITC of GST paid is not available in accordance with the Provision of Section 10(4) read with Section 17(5)(e) of the CGST Act 2017.