"The most recent major report on these costs come from Brown University in the form of the Costs of War project,[1] which said the total for wars in Iraq, Afghanistan, and Pakistan is at least $3.2-4 trillion.[2] The report disavowed previous estimates of the Iraq War's cost as being under $1 trillion, saying the Department of Defense's direct spending on Iraq totaled at least $757.8 billion, but also highlighting the complementary costs at home, such as interest paid on the funds borrowed to finance the wars and a potential nearly $1 trillion in extra spending to care for veterans returning from combat through 2050."

"According to a Congressional Budget Office (CBO) report published in October 2007, the U.S. wars in Iraq and Afghanistan could cost taxpayers a total of $2.4 trillion dollars by 2017 when counting the huge interest costs because combat is being financed with borrowed money."


"WASHINGTON (MarketWatch) — The nine-year-old Iraq war came to an official end on Thursday, but paying for it will continue for decades until U.S. taxpayers have shelled out an estimated $4 trillion.

Over a 50-year period, that comes to $80 billion annually.

"“The direct costs for the war were about $800 billion, but the indirect costs, the costs you can’t easily see, that payoff will outlast you and me,” said Lawrence Korb, a senior fellow at American Progress, a Washington, D.C. think tank, and a former assistant secretary of defense under Ronald Reagan.

Those costs include interest payments on the billions borrowed to fund the war; the cost of maintaining military bases in Kuwait, Qatar and Bahrain to defend Iraq or reoccupy the country if the Baghdad government unravels; and the expense of using private security contractors to protect U.S. property in the country and to train Iraqi forces.

Caring for veterans, more than 2 million of them, could alone reach $1 trillion, according to Paul Rieckhoff, executive director of the Iraq and Afghanistan Veterans of America, in Congressional testimony in July.Although that only represents about 1% of nation’s gross domestic product, it’s more than half of the national budget deficit. It’s also roughly equal to what the U.S. spends on the Department of Justice, Homeland Security and the Environmental Protection Agency combined each year.