The Economic Times newspaper said Thursday both sides are negotiating the final price in what is being termed India's biggest cross-border power-trading deal.
A PTCI official said the project was one of the biggest bilateral projects and would be one of the largest revenue earners for Bhutan.
He said almost 80 percent of Tala's generation capacity would be traded with India. Sonam Tshering, director general of Bhutan's Energy Department, said the final price was being negotiated.
"The project should get commissioned by July or if it is delayed then by end of August," he said. "The surplus power from the project would be traded with India, which should be about 70-80 percent of the total generation capacity."