The $633 million payment under the Coalition Support Fund (CSF) program came Wednesday, amid reports that top US military commanders in Afghanistan were pushing to expand special forces ground raids across the border into Pakistan's tribal areas.
"The Coalition Support Fund is designed to reimburse the government of Pakistan for expenses incurred fighting violent extremist groups," the embassy said in a statement.
It added that the payment covered the first six months of this year and Pakistan had now received "approximately 8.76 billion dollars" since 2001 under the scheme.
The CSF process reimburses 27 nations, including Pakistan, for logistical, military and other support provided to Washington's overseas military operations.
Pakistan has been fighting militants on its border with Afghanistan for years. On Friday some 150 extremists attacked five security posts in an unusually large and coordinated assault, sparking hours of fighting that killed 11 soldiers and 24 insurgents, officials said.
The top government official in Mohmand, Amjad Ali Khan, said 12 soldiers were wounded in the fighting.
The troops called in helicopter gunships to help push back the militants, said Maj. Fazl Ur Rehman, a spokesman for the Frontier Corps security force. The fighting ended by morning.
The Pakistan Army says 2,500 of its soldiers have been killed by militants in the tribal areas since 2001.
