As the new GST structure of 5% and 18% will be effective from September 22, experts are favouring holding off shopping till then. "Any sales made till September 21 will attract...current rates. From September 22...sales will attract...lower rates," KPMG's Abhishek Jain said. "Retailers can’t charge you...old rate even if...distributor arrangements are pending," Deloitte India's Hardik Gandhi said.