Total U.S. Government Spending

Government spending covers a range of services provided by the federal, state, and local governments. When the federal government spends more money than it receives in taxes in a given year, it runs a budget deficit. Conversely, when the government receives more money in taxes than it spends in a year, it runs a budget surplus. If government spending and taxes are equal, it is said to have a balanced budget. For example, in 2009, the U.S. government experienced its largest budget deficit ever, as the federal government spent $1.4 trillion more than it collected in taxes. This deficit was about 10% of the size of the U.S. GDP in 2009, making it by far the largest budget deficit relative to GDP since the mammoth borrowing used to finance World War II.

Federal spending in nominal dollars (that is, dollars not adjusted for inflation) has grown by a multiple of more than 38 over the last four decades, from $92 billion in 1960 to $3.9 trillion in 2014. Comparing spending over time in nominal dollars is misleading though, because it does not take into account inflation, growth in population, or growth in the real economy. A more useful method of comparison is to examine government spending as a percent of GDP over time.

The top line in Figure 1 shows the level of federal spending since 1960, expressed as a share of GDP. Despite a widespread sense among many Americans that the federal government has been growing steadily larger, the graph shows that federal spending has hovered in a range from 18% to 22% of GDP most of the time since 1960. The other lines in Figure 1 show the major federal spending categories: national defense, Social Security, health programs, and interest payments. From the graph, we see that national defense spending as a share of GDP has generally declined since the 1960s, although there were some upward bumps in the 1980s buildup under President Ronald Reagan and in the aftermath of the terrorist attacks on September 11, 2001. In contrast, Social Security and healthcare have grown steadily as a percent of GDP. Healthcare expenditures include both payments for senior citizens (Medicare), and payments for low-income Americans (Medicaid). Medicaid is also partially funded by state governments. Interest payments are the final main category of government spending shown in the figure.

Figure 1. Federal Spending. Since 1960, total federal spending has ranged from about 18% to 22% of GDP, although it climbed above that level in 2009, but quickly dropped back down to that level by 2013. The share that the government has spent on national defense has generally declined, while the share it has spent on Social Security and on healthcare expenses (mainly Medicare and Medicaid) has increased. (Source: Economic Report of the President, Tables B-2 and B-22, http://www.gpo.gov/fdsys/pkg/ERP-2014/content-detail.html)

These four categories—national defense, Social Security, healthcare, and interest payments—account for roughly 71% of all federal spending, as Figure 2 shows. The remaining 29% wedge of the pie chart covers all other categories of federal government spending: international affairs; science and technology; natural resources and the environment; transportation; housing; education; income support for the poor; community and regional development; law enforcement and the judicial system; and the administrative costs of running the government.

Figure 2. Slices of Federal Spending, 2014. About 73% of government spending goes to four major areas: national defense, Social Security, healthcare, and interest payments on past borrowing. This leaves about 29% of federal spending for all other functions of the U.S. government. (Source: https://www.whitehouse.gov/omb/budget/Historicals/)

Each year the government runs a budget deficit, it finances the deficit by borrowing funds from U.S. citizens and foreigners. It does this by selling securities (Treasury bonds, notes, and bills)—in essence borrowing from the public and promising to repay with interest in the future. From 1961 to 1997, the U.S. government has run budget deficits, and thus borrowed funds, in almost every year. It had budget surpluses from 1998 to 2001, and then returned to deficits since then.

The interest payments on past federal government borrowing were typically 1–2% of GDP in the 1960s and 1970s but then climbed above 3% of GDP in the 1980s and stayed there until the late 1990s. The government was able to repay some of its past borrowing by running surpluses from 1998 to 2001 and, with help from low interest rates, the interest payments on past federal government borrowing had fallen back to 1.4% of GDP by 2012.