The Airports Economic Regulatory Authority (AERA), in an order today, said the additional levy shall be merged with the existing airport project development fee.
Mumbai International Airport Limited (MIAL), the private airport operator, currently levies a development fee of Rs 600 from an international passenger and Rs 100 from a domestic passenger. Development fee is charged only from departing passengers.
The additional levy would be applicable from April 1, 2016 and remain in force till March 31, 2021, it said.
MIAL had last year sought AERA's permission to charge additional development fee, to fund the metro rail project.
Mumbai Metro Rail Corporation (MMRC), the project implementing company for all metro rail corridors across the western metropolis, is to construct a 32.5-km underground line, connecting Colaba in South Mumbai to SEEPZ in western Andheri suburb. MMRC, on its part, has sought funding contribution from MIAL.