CESC Ltd was allowed an average 13.29%increase in tariff from West Bengal Electricity Regulatory Commission (WBERC),which would result in a gain of Rs 552 crore for the company for 2011-12. TheWBERC order gave retrospective effect for the hike from April 2011 and CESC's2.4 million consumers will have to pay arrears for the current fiscal in2012-13. CESC had demanded hike of Rs 1.11 a unit on various heads but WBERChas allowed 69 paisa hike for 2011-12.