National debt of the United States

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U.S. federal debt held by the public as a percentage of GDP, from 1940 to 2012

The national debt of the United States is the amount owed by the federal government of the United States. The measure of the public debt is the value of the Treasury securities that have been issued by the Treasury and other federal government agencies[which?] and which are outstanding at that point of time. Gross public debt consists of two components:[1]

In general, debt held by the public increases as a result of government spending and decreases as a result of government tax or other receipts, which fluctuate in the course of the fiscal year, and in practice Treasury securities are not issued or redeemed on a day-by-day basis.[2] (Treasury securities may also be issued or redeemed as part of government macroeconomic management.) The aggregate, gross amount that Treasury can borrow is limited by the United States debt ceiling.[3]

Historically, the US public debt as a share of GDP increased during wars and recessions, and subsequently declined. For example, debt held by the public as a share of GDP peaked just after World War II (113% of GDP in 1945), but then fell over the following 30 years. In recent decades, however, large budget deficits and the resulting increases in debt have led to concern about the long-term sustainability of the federal government's fiscal policies.[4] The ratio of debt to GDP may decrease as a result of a government surplus as well as due to growth of GDP and inflation.

On June 30, 2014, debt held by the public was approximately $12.6 trillion or about 74% of Q1 2014 GDP[5][6] Intragovernmental holdings stood at $5.1 trillion (30%), giving a combined total public debt of $17.6 trillion or about 104% of Q1 2014 GDP.[7] As of January 2013, $5 trillion or approximately 47% of the debt held by the public was owned by foreign investors, the largest of which were the People's Republic of China and Japan at just over $1.1 trillion each.[8]


US federal debt held by the public as a percentage of GDP, from 1790 to 2013, projected to 2038

Except for about a year during 1835–1836, the United States has continuously held a public debt since the US Constitution legally went into effect on March 4, 1789. Public debt as a percentage of GDP reached its highest level during Harry Truman's first presidential term, during and after World War II, but fell rapidly in the post-World War II period, and reached a low in 1973 under President Richard Nixon. Debt as a percentage of GDP has consistently increased since then, except during the presidencies of Jimmy Carter and Bill Clinton.

Valuation and measurement[edit]

Public and government accounts[edit]

Detailed breakdown of government holders of treasury debt and debt instruments used of the public portion

On June 28, 2013, debt held by the public was approximately $11.901 trillion or about 71.43% of GDP.[6][7] Intragovernmental holdings stood at $4.837 trillion, giving a combined total public debt of $16.738 trillion.[7]

The national debt can also be classified into marketable or non-marketable securities. As of March 2012, total marketable securities were $10.34 trillion while the non-marketable securities were $5.24 trillion.[9] Most of the marketable securities are Treasury notes, bills, and bonds held by investors and governments globally. The non-marketable securities are mainly the "government account series" owed to certain government trust funds such as the Social Security Trust Fund, which represented $2.7 trillion in 2011.[10] The non-marketable securities represent amounts owed to program beneficiaries. For example, in the case of the Social Security Trust Fund, the payroll taxes dedicated to Social Security were credited to the Trust Fund upon receipt, but spent for other purposes. If the government continues to run deficits in other parts of the budget, the government will have to issue debt held by the public to fund the Social Security Trust Fund, in effect exchanging one type of debt for the other.[11] Other large intragovernmental holders include the Federal Housing Administration, the Federal Savings and Loan Corporation's Resolution Fund and the Federal Hospital Insurance Trust Fund (Medicare).

Accounting treatment[edit]

U.S. debt from 1940 to 2011. Red lines indicate the "debt held by the public" and black lines indicate the total national debt or gross public debt. The difference is the "intragovernmental debt," which includes obligations to government programs such as Social Security. Stated as a formula, National Debt = Debt held by the Public + Intragovernmental Debt. The second panel shows the two debt figures as a percentage of U.S. GDP (dollar value of U.S. economic production for that year). The top panel is deflated so every year is in 2010 dollars.

Only debt held by the public is reported as a liability on the consolidated financial statements of the United States government. Debt held by government accounts is an asset to those accounts but a liability to the Treasury; they offset each other in the consolidated financial statements.[12]

Government receipts and expenditures are normally presented on a cash rather than an accruals basis, although the accrual basis may provide more information on the longer-term implications of the government's annual operations.[13]

The United States public debt is often expressed as a ratio of public debt to gross domestic product (GDP). The ratio of debt to GDP may decrease as a result of a government surplus as well as due to growth of GDP and inflation.

Fannie Mae and Freddie Mac obligations excluded[edit]

Under normal accounting rules, fully owned companies would be consolidated into the books of the owner, but the large size of Fannie and Freddie has made the U.S. government reluctant to incorporate Freddie and Fannie into its own books. When Freddie and Fannie required bail-outs, White House Budget Director Jim Nussle, on September 12, 2008, initially indicated their budget plans would not incorporate the GSE debt into the budget because of the temporary nature of the conservator intervention.[14] As the intervention has dragged out, pundits have started to further question this accounting treatment, noting that changes in August 2012 "makes them even more permanent wards of the state and turns the government's preferred stock into a permanent, perpetual kind of security".[15] The government controls the Public Company Accounting Oversight Board, which would normally criticize inconsistent accounting practices, but it does not oversee its own government's accounting practices or the standards set by the Federal Accounting Standards Advisory Board. The on- or off-balance sheet obligations of those two independent GSEs was just over $5 trillion at the time the conservatorship was put in place, consisting mainly of mortgage payment guarantees and agency bonds.[16] The confusing independent but government-controlled status of the GSEs has resulted in investors of the legacy common shares and preferred shares launching various activist campaigns in 2014.[17]

Guaranteed obligations excluded[edit]

U.S. federal government guarantees are not included in the public debt total, until such time as there is a call on the guarantees. For example, the U.S. federal government in late-2008 guaranteed large amounts of obligations of mutual funds, banks, and corporations under several programs designed to deal with the problems arising from the late-2000s financial crisis. The funding of direct investments made in response to the crisis, such as those made under the Troubled Assets Relief Program, are included in the debt.

Unfunded obligations excluded[edit]

The U.S. government is obligated under current law to make mandatory payments for programs such as Medicare, Medicaid and Social Security. The Government Accountability Office (GAO) projects that payouts for these programs will significantly exceed tax revenues over the next 75 years. The Medicare Part A (hospital insurance) payouts already exceed program tax revenues, and social security payouts exceeded payroll taxes in fiscal 2010. These deficits require funding from other tax sources or borrowing.[18] The present value of these deficits or unfunded obligations is an estimated $45.8 trillion. This is the amount that would have had to be set aside in 2009 in order to pay for the unfunded obligations which, under current law, will have to be raised by the government in the future. Approximately $7.7 trillion relates to Social Security, while $38.2 trillion relates to Medicare and Medicaid. In other words, health care programs will require nearly five times more funding than Social Security. Adding this to the national debt and other federal obligations would bring total obligations to nearly $62 trillion.[19] However, these unfunded obligations are not counted in the national debt.

Measuring debt burden[edit]

GDP is a measure of the total size and output of the economy. One measure of the debt burden is its size relative to GDP, called the "Debt to GDP ratio." Mathematically, this is the debt divided by the GDP amount. The Congressional Budget Office includes historical budget and debt tables along with its annual "Budget and Economic Outlook." Debt held by the public as a percentage of GDP rose from 34.7% GDP in 2000 to 40.5% in 2008 and 67.7% in 2011.[20]

Mathematically, the ratio can decrease even while debt grows, if the rate of increase in GDP (which also takes account of inflation) is higher than the rate of increase of debt. Conversely, the debt to GDP ratio can increase even while debt is being reduced, if the decline in GDP is sufficient.

According to the CIA World Factbook, during 2011, the U.S. debt to GDP ratio of 67.8% was the 38th highest in the world. This was measured using "debt held by the public."[21] However, this number excludes state and local debt. According to the OECD, general government gross debt (federal, state, and local) in the United States in the third quarter of 2012 was $16.3 trillion, 108% of GDP.[22]

The ratio is higher if the total national debt is used, by adding the "intragovernmental debt" to the "debt held by the public." For example, on January 10, 2013, debt held by the public was approximately $11.577 trillion or about 73% of GDP. Intra-governmental holdings stood at $4.855 trillion, giving a combined total public debt of $16.432 trillion. U.S. GDP in 2012 was approximately $15.6 trillion, for a total debt to GDP ratio of approximately 105%.[9][23][23][24]

Calculating the annual change in debt[edit]

Comparison of deficits to change in debt in 2008

The annual change in debt is not equal to the "total deficit." Social Security payroll taxes and benefit payments, along with the net balance of the U.S. Postal Service, are considered "off-budget", while most other expenditure and receipt categories are considered "on-budget." The total federal deficit is the sum of the on-budget deficit (or surplus) and the off-budget deficit (or surplus). Since FY1960, the federal government has run on-budget deficits except for FY1999 and FY2000, and total federal deficits except in FY1969 and FY1998–FY2001.[25]

In large part because of Social Security surpluses, the total deficit is smaller than the on-budget deficit. The surplus of Social Security payroll taxes over benefit payments is spent by the government for other purposes. However, the government credits the Social Security Trust fund for the surplus amount, adding to the "intragovernmental debt." The total federal debt is divided into "intragovernmental debt" and "debt held by the public." In other words, spending the "off budget" Social Security surplus adds to the total national debt (by increasing the intragovernmental debt) while the surplus reduces the "total" deficit reported in the media.

Certain spending called "supplemental appropriations" is outside the budget process entirely but adds to the national debt. Funding for the Iraq and Afghanistan wars was accounted for this way prior to the Obama administration. Certain stimulus measures and earmarks are also outside the budget process.

For example, in FY2008 an off-budget surplus of $183 billion reduced the on-budget deficit of $642 billion, resulting in a total federal deficit of $459 billion. Media often reported the latter figure. The national debt increased by $1,017 billion between the end of FY2007 and the end of FY2008.[26] The federal government publishes the total debt owed (public and intragovernmental holdings) at the end of each fiscal year[27] and since FY1957 the amount of debt held by the federal government has increased each year.


Contrary to popular belief, reducing the debt burden (i.e., lowering the ratio of debt relative to GDP) is almost always accomplished without running budget surpluses. The U.S. has only run surpluses in four of the past 40 years (1998-2001) but had several periods where the debt to GDP ratio was lowered. This was accomplished by growing GDP (in real terms and via inflation) relatively faster than the increase in debt.

Negative real interest rates[edit]

Since 2010, the U.S. Treasury has been obtaining negative real interest rates on government debt, meaning the inflation rate is greater than the interest rate paid on the debt.[28] Such low rates, outpaced by the inflation rate, occur when the market believes that there are no alternatives with sufficiently low risk, or when popular institutional investments such as insurance companies, pensions, or bond, money market, and balanced mutual funds are required or choose to invest sufficiently large sums in Treasury securities to hedge against risk.[29][30] Economists such as Lawrence Summers and bloggers such as Matthew Yglesias have stated that at such low interest rates, government borrowing actually saves taxpayer money and improves creditworthiness.[31][32]

In the late 1940s through the early 1970s, the US and UK both reduced their debt burden by about 30% to 40% of GDP per decade by taking advantage of negative real interest rates, but there is no guarantee that government debt rates will continue to stay so low.[29][33] Between 1946 and 1974, the US debt-to-GDP ratio fell from 121% to 32% even though there were surpluses in only eight of those years which were much smaller than the deficits.[34]

Converting fractional reserve to full reserve banking[edit]

The two economists, Jaromir Benes and Michael Kumhof, working for the International Monetary Fund published a working paper called The Chicago Plan Revisited suggesting that the debt could be eliminated by raising bank reserve requirements, converting from fractional reserve banking to full reserve banking.[35][36] Economists at the Paris School of Economics have commented on the plan, stating that it is already the status quo for coinage currency,[37] and a Norges Bank economist has examined the proposal in the context of considering the finance industry as part of the real economy.[38] A Centre for Economic Policy Research paper agrees with the conclusion that, "no real liability is created by new fiat money creation, and therefore public debt does not rise as a result."[39]

Debt ceiling[edit]

US debt ceiling at the end of each year from 1981 to 2010

Relationship to appropriation process[edit]

The present debt ceiling is an aggregate limit applied to nearly all federal debt, which was substantially established by the Public Debt Acts[40][41] of 1939 and 1941 and subsequently amended to change the ceiling amount.

The process of setting the debt ceiling is separate and distinct from the federal budget process, and raising the debt ceiling does not have any direct impact on the budget deficit. The U.S. President proposes a federal budget every year. This budget details projected tax collections and outlays and, if there is a budget deficit, the amount of borrowing the President is proposing in that fiscal year. Congress creates specific appropriation bills which authorize spending, which are signed into law by the President.

A vote to increase the debt ceiling is, therefore, usually treated as a formality, needed to continue spending that has already been approved previously by the Congress and the President. The Government Accountability Office (GAO) explains: "The debt limit does not control or limit the ability of the federal government to run deficits or incur obligations. Rather, it is a limit on the ability to pay obligations already incurred."[42] The apparent redundancy of the debt ceiling has led to suggestions that it should be abolished altogether.[43][44]

Since 1979, the House of Representatives passed a rule to automatically raise the debt ceiling when passing a budget, without the need for a separate vote on the debt ceiling, except when the House votes to waive or repeal this rule. The exception to the rule was invoked in 1995, which resulted in two government shutdowns.[45]

Treasury measures when debt ceiling is reached[edit]

The Treasury is authorized to issue debt needed to fund government operations (as authorized by each federal budget) up to a stated debt ceiling, with some small exceptions. When the debt ceiling is reached, Treasury can declare a debt issuance suspension period and utilize "extraordinary measures" to acquire funds to meet federal obligations but which do not require the issue of new debt. One example is to suspend contributions to certain government pension funds. However, these amounts are not sufficient to cover government operations.[46] Treasury first used these measures on December 16, 2009, to remain within the debt ceiling, and avoid a government shutdown,[47] and also used it during the debt-ceiling crisis of 2011. However, there are limits to how much can be raised by these measures.[48]


Development of US federal government debt ceiling from 1990 to January 2012[49]

Between 1940 and January 2013, the debt ceiling was raised 54 times during Republican presidential administrations and 40 times during Democratic administrations. The ceiling was raised the most times (18) during President Reagan's administration, with no other President exceeding 10 times. During President Obama's first term, the ceiling was raised six times.[50]

The debt ceiling was increased on February 12, 2010, to $14.294 trillion.[51][52][53] On April 15, 2011, Congress finally passed the 2011 United States federal budget, authorizing federal government spending for the remainder of the 2011 fiscal year, which ends on September 30, 2011, with a deficit of $1.48 trillion,[citation needed] without voting to increase the debt ceiling. The two Houses of Congress were unable to agree on a revision of the debt ceiling in mid-2011, resulting in the United States debt-ceiling crisis. The impasse was resolved with the passing on August 2, 2011, the deadline for a default by the U.S. government on its debt, of the Budget Control Act of 2011, which immediately increased the debt ceiling to $14.694 trillion, required a vote on a Balanced Budget Amendment, and established several complex mechanisms to further increase the debt ceiling and reduce federal spending.

On September 8, 2011, one of the complex mechanisms to further increase the debt ceiling took place as the Senate defeated a resolution to block a $500 billion automatic increase. The Senate's action allowed the debt ceiling to increase to $15.194 trillion, as agreed upon in the Budget Control Act.[54] This was the third increase in the debt ceiling in 19 months, the fifth increase since President Obama took office, and the twelfth increase in 10 years. The August 2 Act also created the United States Congress Joint Select Committee on Deficit Reduction for the purpose of developing a set of proposals by November 23, 2011, to reduce federal spending by $1.2 trillion. The Act required both houses of Congress to convene an "up-or-down" vote on the proposals as a whole by December 23, 2011. The Joint Select Committee met for the first time on September 8, 2011. The debt ceiling was raised once more on January 30, 2012, to a new high of $16.394 trillion.

At midnight on December 31, 2012, a major provision of the Budget Control Act of 2011 (BCA) was scheduled to go into effect. The crucial part of the Act provided for a Joint Select Committee of Congressional Democrats and Republicans—the so-called "Supercommittee"—to produce bipartisan legislation by late November 2012 that would decrease the U.S. deficit by $1.2 trillion over the next 10 years. To do so, the committee agreed to implement by law—if no other deal was reached before Dec. 31—massive government spending cuts as well as tax increases or a return to tax levels from previous years. These are the elements that make up the 'United States fiscal cliff.'[55]

The Continuing Appropriations Act suspended the statutory debt limit through February 7, 2014.[48] However, after February 7, the US "would be forced to use extraordinary measures to continue to finance the government on a temporary basis" and "Treasury is more likely to exhaust those measures in late February".[48]

Debt holdings[edit]

Estimated ownership each year

Because a large variety of people own the notes, bills, and bonds in the "public" portion of the debt, Treasury also publishes information that groups the types of holders by general categories to portray who owns United States debt. In this data set, some of the public portion is moved and combined with the total government portion, because this amount is owned by the Federal Reserve as part of United States monetary policy. (See Federal Reserve System.)

As is apparent from the chart, a little less than half of the total national debt is owed to the "Federal Reserve and intragovernmental holdings". The foreign and international holders of the debt are also put together from the notes, bills, and bonds sections. To the right is a chart for the data as of June 2008:

Foreign holdings[edit]

Composition of US Long-Term Treasury Debt held by foreign states, Nov. 2005–Nov. 2010. June figures are results of comprehensive Treasury Department surveys.

As of January 2011, foreigners owned $4.45 trillion of U.S. debt, or approximately 47% of the debt held by the public of $9.49 trillion and 32% of the total debt of $14.1 trillion.[56] The largest holders were the central banks of China, Japan, Brazil, Taiwan, United Kingdom, Switzerland and Russia.[58] The share held by foreign governments has grown over time, rising from 13% of the public debt in 1988[59] to 25% in 2007.[60]

As of May 2011 the largest single holder of U.S. government debt was China, with 26 percent of all foreign-held U.S. Treasury securities (8% of total U.S. public debt).[61] China's holdings of government debt, as a percentage of all foreign-held government debt, have decreased a bit between 2010 and 2011, but are up significantly since 2000 (when China held just 6 percent of all foreign-held U.S. Treasury securities).[62]

This exposure to potential financial or political risk should foreign banks stop buying Treasury securities or start selling them heavily was addressed in a June 2008 report issued by the Bank of International Settlements, which stated, "Foreign investors in U.S. dollar assets have seen big losses measured in dollars, and still bigger ones measured in their own currency. While unlikely, indeed highly improbable for public sector investors, a sudden rush for the exits cannot be ruled out completely."[63]

On May 20, 2007, Kuwait discontinued pegging its currency exclusively to the dollar, preferring to use the dollar in a basket of currencies.[64] Syria made a similar announcement on June 4, 2007.[65] In September 2009 China, India and Russia said they were interested in buying International Monetary Fund gold to diversify their dollar-denominated securities.[66] However, in July 2010 China's State Administration of Foreign Exchange "ruled out the option of dumping its vast holdings of US Treasury securities" and said gold "cannot become a main channel for investing our foreign exchange reserves" because the market for gold is too small and prices are too volatile.[67]

According to Paul Krugman, "It’s true that foreigners now hold large claims on the United States, including a fair amount of government debt. But every dollar’s worth of foreign claims on America is matched by 89 cents’ worth of U.S. claims on foreigners. And because foreigners tend to put their U.S. investments into safe, low-yield assets, America actually earns more from its assets abroad than it pays to foreign investors. If your image is of a nation that’s already deep in hock to the Chinese, you’ve been misinformed. Nor are we heading rapidly in that direction."[68]


Further information: United States federal budget

Short-term forecasts[edit]

The Congressional Budget Office releases its "Budget and Economic Outlook" annually in January or February, with an update in August. This report covers a ten-year window. CBO projected in August 2012 that the fiscal year 2012 debt held by the public would be $11,318 billion, or 72.8% GDP. CBO projected that if 2012 tax and spending policies were extended (i.e., the "alternate fiscal scenario"), these amounts would rise to $12,460 billion (78.1% GDP) in 2013 and $22,181 billion (89.7% GDP) in 2022. If the U.S. were to experience significant tax increases and spending cuts (i.e., the "baseline scenario") related to the United States fiscal cliff, these amounts would be considerably less in 2013 ($12,064 billion or 76.1% GDP) and 2022 ($14,464 billion or 58.5% GDP).[69]

Long-term trends[edit]

CBO-Public Debt Under "Extended" and "Alternate" Scenarios

The Congressional Budget Office (CBO) wrote in 2008 that: "Future growth in spending per beneficiary for Medicare and Medicaid – the federal government’s major health care programs – will be the most important determinant of long-term trends in federal spending. Changing those programs in ways that reduce the growth of costs – which will be difficult, in part because of the complexity of health policy choices – is ultimately the nation’s central long-term challenge in setting federal fiscal policy."[70]

Demographic shifts and per-capita spending are causing Social Security and Medicare/Medicaid expenditures to grow significantly faster than GDP. If this trend continues, government simulations under various assumptions project mandatory spending for these programs will exceed taxes dedicated to these programs by more than $40 trillion over the next 75 years on a present value basis.[71]

According to the GAO, this will double debt-to-GDP ratios by 2040 and double them again by 2060, reaching 600% by 2080.[72] A GAO simulation indicates that Social Security, Medicare, and Medicaid expenditures alone will exceed 20% of GDP by 2080, which is approximately the historical ratio of taxes collected by the federal government. In other words, these mandatory programs alone will take up all government revenues under this simulation.[71]

CBO long-term scenarios[edit]

The Congressional Budget Office projects the debt as part of its "Long-term Budget Outlook" which is released annually. The 2012 Outlook included projections for debt through 2037. CBO outlined two scenarios, the "Extended Baseline" scenario and "Extended Alternative Fiscal" scenario. The Baseline scenario assumes significant fiscal austerity, with lower debt and deficits via higher tax revenues and lower spending. The Alternative scenario assumes higher debt and deficits via lower tax revenues and higher spending. CBO projected that debt held by the public would be 53% of GDP in 2037 under the Baseline Scenario but 199% under the Alternate Scenario, versus 73% in 2012. CBO has warned that the debt levels under the Alternative scenario would pose significant risks, including much higher interest expenses crowding out government benefits.[73]

CBO estimated in August 2011 that if laws currently "on the books" were enforced without changes, meaning the "extended baseline scenario" described above is implemented along with deficit reductions from the Budget Control Act of 2011, the deficit would decline from 8.5% GDP in 2011 to around 1% GDP by 2021.[74]

The CBO reported in August 2011: "Many budget analysts believe that the alternative fiscal scenario presents a more realistic picture of the nation’s underlying fiscal policies than the extended-baseline scenario does. The explosive path of federal debt under the alternative fiscal scenario underscores the need for large and rapid policy changes to put the nation on a sustainable fiscal course."[74]

Risks and debates[edit]

Risks due to increasing entitlement spending, according to GAO's projections of future trends
Components of interest on the debt

CBO risk factors[edit]

The CBO reported several types of risk factors related to rising debt levels in a July 2010 publication:


According to the Government Accountability Office (GAO), the United States is on a fiscally unsustainable path because of projected future increases in Medicare and Social Security spending, and that politicians and the electorate have been unwilling to change this path.[18] Further, the subprime mortgage crisis has significantly increased the financial burden on the U.S. government, with over $10 trillion in commitments or guarantees and $2.6 trillion in investments or expenditures as of May 2009, only some of which are included in the public debt computation.[76] However, these concerns are not universally shared.[77]

Risks to economic growth[edit]

Debt levels may affect economic growth rates. In 2010, economists Kenneth Rogoff and Carmen Reinhart reported that among the 20 developed countries studied, average annual GDP growth was 3–4% when debt was relatively moderate or low (i.e. under 60% of GDP), but it dips to just 1.6% when debt was high (i.e., above 90% of GDP).[78] In April 2013, the conclusions of Rogoff and Reinhart's study have come into question when a coding error in their original paper was discovered by Herndon, Ash and Pollin of the University of Massachusetts, Amherst.[79][80] They found that after correcting for errors and unorthodox methods used, there was no evidence that debt above a specific threshold reduces growth.[81] Reinhart and Rogoff maintain that after correcting for errors, a negative relationship between high debt and growth remains.[82] However, other economists, including Paul Krugman, have argued that it is low growth which causes national debt to increase, rather than the other way around.[83][84][85]

A February 2013 paper from four economists concluded that, "Countries with debt above 80 percent of GDP and persistent current-account [trade] deficits are vulnerable to a rapid fiscal deterioration..."[86][87] The statistical relationship between a higher trade deficit and higher interest rates was stronger for several troubled Eurozone countries, indicating significant private borrowing from foreign countries (required to fund a trade deficit) may be a bigger factor than government debt in predicting interest rates.[88]

Former Federal Reserve Chairman Ben Bernanke stated in April 2010 that "Neither experience nor economic theory clearly indicates the threshold at which government debt begins to endanger prosperity and economic stability. But given the significant costs and risks associated with a rapidly rising federal debt, our nation should soon put in place a credible plan for reducing deficits to sustainable levels over time."[89]

Mandatory programs[edit]

While there is significant debate about solutions,[90] the significant long-term risk posed by the increase in mandatory program spending is widely recognized,[91] with health care costs (Medicare and Medicaid) the primary risk category.[92][93] In a June 2010 opinion piece in the Wall Street Journal, former chairman of the Federal Reserve, Alan Greenspan noted that "Only politically toxic cuts or rationing of medical care, a marked rise in the eligible age for health and retirement benefits, or significant inflation, can close the deficit."[94] If significant reforms are not undertaken, benefits under entitlement programs will exceed government income by over $40 trillion over the next 75 years.[93]

Interest costs[edit]

Despite rising debt levels, interest costs have remained at approximately 2008 levels (around $450 billion in total) due to lower interest rates paid to Treasury debt holders.[95] However, should interest rates return to historical averages, the interest cost would increase dramatically. Historian Niall Ferguson described the risk that foreign investors would demand higher interest rates as the U.S. debt levels increase over time in a November 2009 interview.[96]

Definition of public debt[edit]

Economists also debate the definition of public debt. Krugman argued in May 2010 that the debt held by the public is the right measure to use, while Reinhart has testified to the President's Fiscal Reform Commission that gross debt is the appropriate measure.[83] The Center on Budget and Policy Priorities (CBPP) cited research by several economists supporting the use of the lower debt held by the public figure as a more accurate measure of the debt burden, disagreeing with these Commission members.[97]

There is debate regarding the economic nature of the intragovernmental debt, which was approximately $4.6 trillion in February 2011.[98] For example, the CBPP argues: that "large increases in [debt held by the public] can also push up interest rates and increase the amount of future interest payments the federal government must make to lenders outside of the United States, which reduces Americans’ income. By contrast, intragovernmental debt (the other component of the gross debt) has no such effects because it is simply money the federal government owes (and pays interest on) to itself."[97] However, if the U.S. government continues to run "on budget" deficits as projected by the CBO and OMB for the foreseeable future, it will have to issue marketable Treasury bills and bonds (i.e., debt held by the public) to pay for the projected shortfall in the Social Security program. This will result in "debt held by the public" replacing "intragovernmental debt".[99][100]

Intergenerational equity[edit]

One debate about the national debt relates to intergenerational equity. For example, if one generation is receiving the benefit of government programs or employment enabled by deficit spending and debt accumulation, to what extent does the resulting higher debt impose risks and costs on future generations? There are several factors to consider:

Economist Paul Krugman wrote in March 2013 that by neglecting public investment and failing to create jobs, we are doing far more harm to future generations than merely passing along debt: "Fiscal policy is, indeed, a moral issue, and we should be ashamed of what we’re doing to the next generation’s economic prospects. But our sin involves investing too little, not borrowing too much." Young workers face high unemployment and studies have shown their income may lag throughout their careers as a result. Teacher jobs have been cut, which could affect the quality of education and competitiveness of younger Americans.[104]


National debt for selected years[edit]

debt in
debt in
as % of GDP
Low-High est.
(a – Treas.
held by
as %
of GDP
OMB or
19102.658.02.658.0est. 32.8
192025.9529.225.9529.2est. 88.6
1927[109] 18.5119.218.5119.2est. 96.5
193016.1916.616.1916.6est. 97.4
2000(a1) 5,6745,629a55.8/57.63,41034.710,150/9,821
2001(a2) 5,8075,770a54.8/56.63,32032.510,570/10,230
2002(a3) 6,2286,198a57.2/59.03,54033.610,880/10,540
2003(a) 6,7836,760a 59.8/61.83,91335.611,330/10,980
2004(a) 7,3797,355a 61.0/63.24,29636.812,090/11,680
2005(a4) 7,9337,905a 61.4/63.84,59236.912,890/12,430
2006(a5) 8,5078,451a 62.0/64.44,82936.513,690/13,210
2007(a6) 9,0088,951a 62.8/64.85,03536.214,320/13,860
2008(a7) 10,0259,986a 67.8/69.85,80340.214,760/14,330
2009(a8) 11,91011,876a 82.6/85.27,55253.614,410/13,960
2010(a9) 13,56213,529a 91.6/94.49,02362.214,790/14,350
2011(a10) 14,79014,764a 96.0/99.010,12715,390/14,930
2012(a11) 16,06616,051a 99.8/103.211,27016,090/15,550
2013(a12) 16,73816,719a 100.6/-16,630/-
(Oct. '13-
Jun. '14)

On June 25, 2014, the BEA announced: "[On July 30, 2014, i]n addition to the regular revision of estimates for the most recent 3 years and for the first quarter of 2014, GDP and select components will be revised back to the first quarter of 1999.

Fiscal years 1940–2009 GDP figures were derived from February 2011 Office of Management and Budget figures which contained revisions of prior year figures due to significant changes from prior GDP measurements. Fiscal years 1950–2010 GDP measurements were derived from December 2010 Bureau of Economic Analysis figures which also tend to be subject to revision, especially more recent years. Afterwards the OMB figures were revised back to 2004 and the BEA figures (in a revision dated July 31, 2013) were revised back to 1947.

Absolute differences from advance (one month after) BEA reports of GDP percent change to current findings (as of November 2013) found in revisions are stated to be 1.3% ± 2.0% or a 95% probability of being within the range of 0.0–3.3%, assuming the differences to occur according to standard deviations from the average absolute difference of 1.3%. E.g. with an advance report of a $400 billion increase of a $10 trillion GDP, for example, one could be 95% confident that the range would be 0.0 to 3.3% different than 4.0% (400 ÷ 10,000) or $0 to $333 billion different than the hypothetical $400 billion.

Fiscal years 1940–1970 begin July 1 of the previous year (for example, Fiscal Year 1940 begins July 1, 1939 and ends June 30, 1940); fiscal years 1980–2010 begin October 1 of the previous year.

Intergovernmental debts before the Social Security Act are presumed to equal zero.

1909–1930 calendar year GDP estimates are from[110] Fiscal Year estimates are derived from simple linear interpolation.

(a1) Audited figure was "about $5,659 billion."[111]

(a2) Audited figure was "about $5,792 billion."[112]

(a3) Audited figure was "about $6,213 billion."[112]

(a) Audited figure was said to be "about" the stated figure.[113]

(a4) Audited figure was "about $7,918 billion."[114]

(a5) Audited figure was "about $8,493 billion."[114]

(a6) Audited figure was "about $8,993 billion."[115]

(a7)Audited figure was "about $10,011 billion."[115]

(a8) Audited figure was "about $11,898 billion."[116]

(a9) Audited figure was "about $13,551 billion."[117]

(a10) GAO affirmed Bureau of the Public debt figure as $14,781 billion.[118]

(a11) GAO affirmed Bureau of the Public debt figure as $16,059 billion.[118]

(a12) GAO affirmed Bureau of the Public debt figure as $16,732 billion.[119]

Interest Paid[edit]

YearHistorical Debt Outstanding, US$[120]Interest paid[121]Interest rate

Foreign holders of US Treasury securities[edit]

The following is a list of the top foreign holders (over $75 billion) of US Treasury securities as listed by the US Treasury (revised by April 2014 survey):[122]

Leading foreign holders of US Treasury securities as of April 2014
Economic areaBillions of dollars (est.)Ratio of owned US debt
to GDP (est.)[123][124]
Percent change since
April 2013
Mainland China1,263.29%- 2.1%
Japan1,209.724%+ 8.7%
Caribbean Banking Centers1308.4n/a+ 8.2%
Oil exporters2255.5n/a- 6.0%
Brazil245.811%- 2.9%
British Islands3185.57%+15.8%
Switzerland177.627%- 4.4%
Taiwan175.736%- 5.4%
Hong Kong155.157%+ 9.8%
Luxembourg141.3233%- 5.6%
Ireland112.151%- 7.0%
Singapore93.131%+ 0.9%
Others1,069.6n/a+ 1.7%
Grand total5,960.9n/a+ 4.4%

1Caribbean Banking Centers are Cayman Islands, Bermuda, British Virgin Islands, Bahamas, Netherlands Antilles, and Panama

2Oil exporters are Indonesia, Saudi Arabia, Nigeria, Iran, United Arab Emirates, Venezuela, Iraq, Algeria, Qatar, Kuwait, Ecuador, Oman, Libya, Bahrain, and Gabon

3British Islands are United Kingdom, Guernsey, Jersey, and Isle of Man


Revenue and Expense as percent of GDP
US federal debt as percent of GDP by presidential party from 1940 to 2012
US federal debt as percent of GDP by Senate majority party from 1940 to 2009

International debt comparisons[edit]

Gross debt as percentage of GDP
United States62%92%102%
European Union59%80%83%
Czech Republic28%38%41%
United Kingdom47%80%86%
Asia 137%40%41%
Latin America 241%37%35%

Sources: Eurostat,[140][dead link] International Monetary Fund, World Economic Outlook (emerging market economies); Organisation for Economic Co-operation and Development, Economic Outlook (advanced economies)[141]

1China, Hong Kong SAR, India, Indonesia, Korea, Malaysia, the Philippines, Singapore and Thailand

2Argentina, Brazil, Chile and Mexico

Recent additions to the public debt of the United States[edit]

Deficit and Debt Increases 2001–2013
Recent additions to U.S. public debt[24][105][106][108]
Fiscal year (begins
Oct. 1 of year prior
to stated year)
Value of
yrly debt
% of GDPTotal debt
% of GDP
Mar.'14 only)

The more precise FY 1999–2013 debt figures are derived from Treasury audit results.

The variations in the 1990s and FY 2014 figures are due to double-sourced or relatively preliminary GDP figures respectively.

A comprehensive revision GDP revision dated July 31, 2013 was described on the Bureau of Economic
Analysis website. In November 2013 the total debt and yearly debt as a percentage of GDP columns of this table were
changed to reflect those revised GDP figures.

Historical debt ceiling levels[edit]

See also[edit]


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Further reading[edit]

External links[edit]