The company had posted a net profit of Rs 40.50 crore during January-March 2014.
Its net sales dipped 30 per cent to Rs 159.85 crore during January-March 2015 as against Rs 228.36 crore during the fourth quarter of the previous fiscal.
Total expenses of the firm stood at Rs 166.15 crore during the quarter as against Rs 181.64 crore in the corresponding quarter of the previous fiscal.
The company said it has disclosed Rs 32.50 crore as "contingent liability" with regard to the bank guarantee (BG) towards a coal block in the wake of a High Court order to keep the BG valid till May 28, 2015 by which the Court had asked the Coal Ministry to take a decision on it.
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Coal Ministry in November 2012 had issued notice to the firm for invoking BG towards a block but the Court had granted a stay and asked Ministry to take decision by May 28.
As per the Ministry's directive to furnish expenses by previous allottees, the company said it has submitted the details.
"Based on rules and necessary legal opinion obtained by the company, the provision made during the quarter ended September 30, 2014 on coal block expenses amounting to Rs 6.27 crore has been reversed during the current quarter", it said.
For the entire 2014-15 fiscal, the firm recoded a 9.14 per cent decline in its net to Rs 91.94 crore against Rs 101.19 crore.
Net sales was almost stagnant at Rs 766.23 crore during the last fiscal as against Rs 762.72 crore. Total expenses for the fiscal stood at Rs 703.45 crore as against Rs 654.64 crore in 2013-14.
The company's shares were trading 7.86 per cent down at Rs 720.60 per scrip during afternoon session on the BSE.