Watson Institute for International and Public Affairs
Costs of War

Summary of War Spending, in Billions of Current Dollars
(Rounded to the Nearest Billion)
FY2001-FY2020

Posted on November 13, 2019

US BUDGETARY COSTS The vast economic impact of the US war on terrorism is poorly understood by the American public and policymakers. This chart and the attached paper estimate the costs of the wars. 

  $ Billions
Overseas Contingency Operations (OCO) Appropriations  
Department of Defense $1,959
State Department / USAID 131
Estimated Interest on Borrowing for DOD and State Dept OCO Spending 925
War-related Spending in the DOD Base Budget  
Estimated Increases to DOD Base Budget Due to Post-9-11 Wars 803
"OCO for Base" a new category of spending in FY2019 and FY2020 100
Medical and Disability Care for Post-9/11 Veterans 437
Homeland Security Spending for Prevention and Response to Terrorism 1,054
Total War Appropriations and War-Related Spending through FY 2020 5,409
Estimated Future Obligations for Veterans Medical and Disability FY2020 - FY2059 >1,000
Total War-Related Spending through FY2020 and Obligations for Veterans $6,409

November 2019