In tandem, Bangalore Metropolitan Transport Corporation also announced a modest fare hike ranging from Re 1 to Rs 3.
The hike would come into affect from midnight tonight, KSRTC and BMTC said in separate statements.
KSRTC said the financial burden on the Corporation due to fuel price hike will be Rs.120.10 crore per annum.
Besides, as per the fare revision formula approved by government, the dearness allowance increase to employees had also been factored in for fare revision.
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With this fare increase, additional revenue mobilization expected per annum is Rs 186.72 crore and the additional cost is Rs 222.68 crore, leaving a deficit of Rs 35.96 crore per annum.
BMTC also said the frequent hike in the High Speed Diesel price since January 18 and release of DA and HRA to the employees has resulted in severe financial burden.
The increase will be from Rs 1 to Rs 3 for ordinary services and apply to all categories of "Non-AC services" only, it said.