Here's how much the war on ISIS is costing the United States

BRETT LOGIURATO AND AMANDA MACIAS --- BUSINESS INSIDER 

Ongoing operations in Iraq and Syria to confront the extremist group calling itself the Islamic State cost an estimated $7 million to $10 million per day, the Department of Defense said Tuesday. 

"We're still at the $7 million to $10 million, and as I said when I talked about it last week, it's just an estimate and it's likely to change over time," Pentagon spokesman Rear Admiral John Kirby told reporters. "And as operations intensify, you know, you can expect that that number will probably go north of that over time."

Earlier Pentagon estimates had put the cost of fighting the Islamic State, also known as ISIS or ISIL, around $7.5 million per day, amid the US escalating its campaign in Iraq with airstrikes beginning in early August. Since the stepped-up involvement in early June, including surveillance flights and increased deployment of military advisers, the number was much lower.

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