According to sources, the amount on account of tariff differential during last three months, from July to September 2010, has reached Rs 57 billion, against Rs 30 billion, allocated in the budget for the current fiscal year.

Sources said that there is a proposal that 2 percent tariff would be passed on to the consumers every month to minimise the gap. An amount of Rs 20 billion per month was being added because of tariff differential between 20 to 25 percent on account of production cost and recovery that would have an accumulated impact of Rs 220 billion to Rs 230 billion on the budget for the fiscal year if the gap was not reduced, they added.