Tamil Nadu revises auto-rickshaw fares across Chennai and the State, detailing new minimums, per-km rates, night and ghat-road charges. CHENNAI: The state government has fixed the minimum fare for autorickshaws at Rs 50 for the first 1.8 km and Rs 25 for every subsequent kilometre, revising. Waiting time will cost Rs 1 a minute, and night fares between 10 p.m. will be 1.5 times the regular fare.