Which key items recorded the highest & lowest inflation in Sept 2026. India's retail inflation rose from 4.83% in August to 5.54% in September, driven by a rise in food prices, with a 7.74% inflation rate. The key items with the highest inflation in September included onion, silver jewellery, ginger, garlic and lemon. Meanwhile, potato, tomato, motor car and jeep, lady's finger and coconut were the key items with the lowest inflation.