Cost of National Security

Welcome Cost of War Visitors

Thanks for visiting National Priorities Project's Cost of War page. You are being redirected to Cost of National Security, our new resource showing the Cost of War in Iraq and Afghanistan as well as spending for the Department of Defense, Homeland Security, Nuclear Weapons, and Foreign Military Assistance.

If you have any questions or need assistance locating Cost of War information, please do not hesitate to contact us at or 413-584-9556.

Try using Cost of National Security with our Trade-Offs tool. Curious about these counters? Visit our notes & sources page.

Our counters show the costs of the United States’ wars since September 11, 2001. Counters reflect costs estimated by the Costs of War project at Brown University.

Last updated September 3, 2021.

Costs of the War on Terror since 2001

Care for Veterans of the War on Terror

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Homeland Security Costs of War

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Interest on War Debt

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Military Costs of War on Terror

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State Department in War on Terror

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Total Cost of War on Terror

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Trade-Offs: What else could these dollars buy?

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Why are these numbers different from the numbers in our Trade-Offs tool?

The numbers in Trade-Offs are projected total costs for a federal program in a given year. The numbers in the Cost of National Security counters are changing in real time to show how much has been spent on a program this year to date.