The minimum fares of autorickshaws and taxis in the Mumbai metropolitan region will go up by a rupee from June 1. The minimum fare for autos will go up from Rs 17 to Rs 18, while minimum taxi fare will go up from Rs 21 to Rs 22. The minimum fare for cool cabs has gone up by Rs 2 - from Rs 26 to Rs 28.The decision was taken at the Mumbai Metropolitan Regional Transport Authority (MMRTA) meeting held on Monday. It will come into effect only after the meters are re-calibrated, starting June 1.For autos, the minimum fare will now be Rs 18 and Rs 12.19 per subsequent km as compared to Rs 11.33 per km now. For taxis, the minimum fare will now be Rs 22 and Rs 14.84 per subsequent km as compared to Rs 13.96 now. For cool cabs, the minimum fare will be Rs 28 and Rs 18.55 per subsequent km as compared to Rs 17.45 now.Officials said the calculations on the fare hike were based on the Hakim committee formula that takes into account factors like fuel price, cost of repairs and maintenance and the cost of living index.