Union Minister Arun Jaitley has said hotel rooms costing upto 7,500 will come under the 18 per cent slab on Goods and Services Tax. Rooms with higher charges will be taxed at 28 per cent. The GST on restaurants in these hotels will be 18 per cent -- at par with other air-conditioned restaurants. The official launch of the GST, the minister added, will take place on the midnight of June 30 and July 1 at a function in Delhi.