How Are Our Federal Tax Dollars Spent?

The 1040 tax form.

We all grumble about having to pay taxes, but few people really know how the government spends that money. Where do our tax dollars really go?

In fiscal year 2008, federal government spending reached $3 trillion, which is roughly 21 percent of the country's gross domestic product (GDP). Of that amount, more than $2.5 trillion was financed by federal tax revenues collected by the government. The remaining $459 billion was financed by government borrowing to make up for the budget deficit, which occurs when total government expenditure exceeds total tax revenue in a given year. [Graphic details spending]

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Denise Chow
Live Science Contributor

Denise Chow was the assistant managing editor at Live Science before moving to NBC News as a science reporter, where she focuses on general science and climate change. Before joining the Live Science team in 2013, she spent two years as a staff writer for Space.com, writing about rocket launches and covering NASA's final three space shuttle missions. A Canadian transplant, Denise has a bachelor's degree from the University of Toronto, and a master's degree in journalism from New York University.