Managing use of dynamic power sharing for dual carrier operation is provided. A power head room report is received (902) from the master cell group. An allowed tolerance is identified (904) from the received power head room report, which includes a maximum expected possible deviation between a power level at which the user equipment requests that a communication be set and an actual power level at which the corresponding communication is transmitted. A lower bound of a maximum configured power of the secondary cell group is determined (906), which enables the user equipment to meet emission requirements during the dual carrier operation, as well as the total power constraints, while accounting for the allowed tolerance identified. The lower bound of the maximum configured power for the carrier of the secondary cell group is set (908) at the determined level.