If you are coming from a country which is included in SAARC (South Asian Association for Regional Co-operation) then you do NOT have to pay any visa fee application fee.
Nationals from India DO NOT NEED A VISA to enter Nepal as per the present laws.
However for people from other countries who come to Nepal on tourist visa need to pay an additional USD $ 20 (generally it is included in 90 days VISA but you can check on while applying for one).
* One can enter Nepal from TIA(Kathmandu), Kakarvitta( Jhapa), Birganj(Parsa), Kodari(Sindhupalchowk),Belahia(Bhairahawa), Jamunaha(Nepalgunj), Mohana(Dhangadhi) and Gaddachauki(Mahendranagar)
* Countries NOT eligible for VISA on Arrival in Nepal include