From the Costs of War Project: Because the Iraq war appropriations for FY2003 - FY2013 were not funded with new taxes, but by borrowing, it is important to keep in mind the interest costs already paid, and future interest costs. Iraq War appropriations for DOD and State were 54 percent of the interest costs. If one were to include Iraq's share of cumulative interest through 2053, those costs could be more than $3.9 trillion.
So far, Washington has paid some 260 billion dollars in interest charged on war-related borrowing, but the potential interest cost of the U.S. war debt reaches into the trillions
31 March 2013 - Costs to U.S. taxpayers of the wars in Iraq and Afghanistan will run between four and six trillion dollars, making them the most expensive conflicts in U.S. history, according to a new report by a prominent Harvard University researcher.
While Washington has already spent close to two trillion dollars in direct costs related to its military campaigns in the two countries, that total “represents only a fraction of the total war costs”, according to the report by former Bill Clinton administration official Linda Bilmes.
“The single largest accrued liability of the wars in Iraq and Afghanistan is the cost of providing medical care and disability benefits to war veterans,” she wrote in the 21-page report, ‘The Financial Legacy of Iraq and Afghanistan: How Wartime Spending Decisions Will Constrain Future National Security Budgets’. read more>>>