"All importers of coal have misclassified their imports, which has led to short payment of duty. Coal imports at the ports in Gujarat alone last year (2012-13) has led to duty evasion of around Rs 600 crore," a DRI official said.
"Coal importers from the state are under scanner, for reporting bituminous coal imports as steam coal," he said.
Steam coal was exempt from customs duty in 2012-13, but it attracted a concessional Counter Vailing Duty (CVD) of one percent. However, Bituminous coal attracted a duty of 5 percent and CVD of 6 percent.
"Misclassification of coal imports was a nationwide phenomenon last year involving an estimated duty evasion of upto Rs 2,500 crore," a DRI official said.
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"The coal imports last year at ports like Tuiticorin, Paradip, Mumbai, New Mangalore Port, amongst other are under scanner," he said.
Alarmed over the trend, Union Finance Minister P Chidambaram, equalised the duty structure on coal in the 2013-14 budget.
"Steam coal is exempt from customs duty but attracts a concessional CVD of one percent. Bituminous coal attracts a duty of 5 percent and CVD of 6 percent," he had said.
As per FM's budget speech, coal imports during April-December, 2012 in India crossed 100 million tonnes.