Imports from Pakistan into India constituted USD 441 million in fiscal year 2016 while Indian exports into Pakistan stood at USD 2.171 billion.
informal trade via Dubai estimated to be USD 4.71 billion. Of this, India’s exports to Pakistan are estimated to be USD 3.99 billion and imports from Pakistan USD 0.72 billion. Trading through a ‘third country,’ generally done through Dubai, is not illegal. The ‘third country’ trade also happens through agents in Singapore.
illegal trade (smuggling) is at quite another level “Smuggling of good between India and Pakistan estimated at $5 billion and it is mostly goods exported from India to Pakistan,”
it first goes to Afghanistan/Iran, then onward to Pakistan