Government has decided to increase withholding tax  mobile top up tax from 10% to 15%. The new tax will apply on first July 2013. Government is also thinking to increase call rates.

  The current tax rate is 10%.  After this month If you will recharge 100 rupees card you will receive only 65.5 rupees and tax will 34.5 rupees On the recharge of 500 rupees card you will only receive 333 rupees. On the top up of 1,000 rupees you will get only 666 rupees

These taxes are charged by Government but there are some other network service chargers which is depends on service providers