Updated on February 23, 2026

What is Deficit Spending?

Deficit spending occurs when a government spends more money than it collects in revenue during a specific fiscal period. This creates a budget deficit.

What is deficit spending? Is government debt bad? Can the US Government spend its way to prosperity? These questions are increasingly important, especially when politicians promote very different economic policies. In 2026, with US federal debt at historic levels and inflation debates ongoing, understanding these concepts is more critical than ever.

Deficit Spending in Simple Terms

Think of deficit spending like using a credit card: you're spending money you don't currently have, with the expectation you'll pay it back later. For governments, this means borrowing to fund priorities when tax revenue falls short.

Deficit spending allows governments to:

• Respond to emergencies like pandemics, natural disasters, or wars without waiting to collect taxes
• Invest in long-term projects such as highways, schools, and research that pay dividends over decades
• Stabilize the economy during recessions by maintaining spending when private sector demand collapses
• Provide essential services even when economic downturns reduce tax collections

The key question isn't whether deficit spending happens—most modern governments do it—but when, how much, and for what purpose.

Why Governments Use Deficit Spending

Governments turn to deficit spending for several strategic and practical reasons, according to research from the Congressional Budget Office and International Monetary Fund Fiscal Monitor:

• Stabilize recessions: When unemployment rises and consumer spending drops, government spending can fill the gap and prevent economic spirals (see Chicago Fed analysis of fiscal multipliers)
• Respond to emergencies: Wars, pandemics, and natural disasters require immediate spending that can't wait for tax collection cycles
• Fund long-term investments: Infrastructure, education, and research have multi-decade payback periods that justify borrowing now (CEA infrastructure economics)
• Maintain public services: Essential services like defense, healthcare, and education must continue even when revenues temporarily decline
• Political incentives: Elected officials face pressure to deliver benefits today while deferring costs to future administrations (see how voting systems affect policy priorities)
• Exploit low interest rates: When borrowing costs are low (10-year Treasury yields averaged 1.5% in 2020-2021 per FRED), the return on productive investments can exceed the interest paid

The US Treasury Department manages this borrowing through various maturity bonds, from short-term bills to 30-year bonds.

How Deficit Spending Is Financed

When a government runs a deficit, it must bridge the gap between spending and revenue. Here's how deficit financing actually works:

Issuing Government Bonds: The primary method is selling Treasury securities—promises to repay borrowed money with interest. These come in various forms:

• Treasury Bills (T-Bills): Short-term securities maturing in less than one year
• Treasury Notes: Medium-term securities maturing in 2-10 years
• Treasury Bonds: Long-term securities maturing in 20-30 years

Who Buys Government Debt?

• Domestic investors: Pension funds, insurance companies, banks, and individual savers seeking safe returns
• Foreign governments: Central banks and sovereign wealth funds (especially China and Japan) hold US debt as reserves
• The Federal Reserve: Through quantitative easing, the Fed can purchase government bonds, effectively creating new money
• Public institutions: Social Security trust funds and other government accounts hold Treasury securities

Interest Costs: The government must pay interest on this debt. As of 2026, rising interest rates have made debt service one of the fastest-growing parts of the federal budget, with net interest projected to reach $892 billion (3.1% of GDP) in 2024 per CBO. While government borrowing rates remain relatively low compared to private sector rates (compare to payday loan interest rates), the absolute cost continues rising.

Pros and Cons of Deficit Spending

Like any economic policy tool, deficit spending involves tradeoffs. Here's a balanced assessment:

The key insight from modern economics: the context determines whether deficit spending is beneficial or harmful. A $1 trillion deficit during a severe recession with 10% unemployment has vastly different effects than the same deficit when unemployment is 3% and inflation is rising.

What Does a Recession Mean for the Economy?

In a recession or a depression, people spend less money. That means grocery stores get less revenue. That means the owners of the stores can pay fewer employees. That means the employees can spend less money.

That means restaurants get less revenue, because people don't eat out as much. That means restaurant owners can pay fewer employees. That means the employees can spend less money.

The economy depends on people spending money, and they need to have money (or credit) to spend it. This cyclical flow is fundamental to understanding the velocity of money.

What is the Velocity of Money?

The velocity of money is the economic term for how a dollar spent in the economy gets spent and respent. As you well know, injecting money to the economy at the megabank level does very little for the economy unless that money gets loaned to small businesses like yours and mind. If it merely gets rolled over into exotic financial instruments like credit default swaps and derivatives and mortgage slices, it doesn't circulate in the economy among people who will spend it where that money has a positive velocity.

Compare that to something like SNAP (Supplemental Nutrition Assistance Program), which has a velocity of around 1.50-1.79x per USDA Economic Research Service analysis. A SNAP dollar gets spent every month in places where it will circulate and recirculate. According to Center on Budget and Policy Priorities research, that dollar going to SNAP increases GDP by roughly $1.50 to $1.80. That's a 50-80% economic return!

Among conservatives who talk economics at all, a few know enough to talk about the ratio of debt to GDP, as if there's some unsustainable threshold of federal debt. There probably is an unsustainable threshold, but if you pick an arbitrary number out of the air because it sounds good ($15 trillion dollars), you're going to miss an important context. The conservative position is often that the current US government uses deficit spending too much so it owes too much money and so it must cut spending, cut deficits, cut the American debt, cut cut cut.

That position has two problems in practice.

Academic economists debate whether US debt-to-GDP poses an immediate threat. The influential Reinhart-Rogoff "Growth in a Time of Debt" (AER 2010) study proposed a 90% debt-to-GDP threshold for growth drag, but IMF Working Paper 2014/004 by Pescatori, Sandri, and Simon identified serious calculation errors and data exclusions in the original analysis. Meanwhile, NBER Working Paper 31510 documents that the US sustained 119% debt-to-GDP in 1945 without triggering the predicted economic collapse.

Second, there's a business cycle of which the entire point of both fiscal (how does the government spend its money) and monetary (how much of a sovereign currency is available at any point in time and why) policy hopes to smooth out.

By expanding and contracting the money supply (monetary policy), the Federal Reserve tries to keep the GDP growing at a rate of 2% per year (Fed's long-run goal established in 2012). When it's growing faster, the central bank raises interest rates (to discourage borrowing and decrease the amount of money in circulation) and reduces the amount of money in circulation. That's to discourage velocity slightly. When it's growing slower, the central bank lowers interest rates (like the emergency 0-0.25% rate in March 2020) to encourage borrowing and increase the amount of money in circulation.

Definition of Deficit Spending

The definition of deficit spending is borrowing money right now that you'll have to pay back in the future. It's not a short term loan like a 30 day line of credit a business might use to cover payroll. It's borrowing money for 90 or 180 days or one, five, or ten years. It's like taking out a mortgage to buy a house; if getting what you want or need right now is more important or valuable than the money you'll spend on interest, it can be a good deal.

Deficit spending implies a few things:

• The government has power to control its spending.
• The government has the power to spend more than it brings in in revenue in a given fiscal period (that is, it can perform deficit spending at all).
• The government has the ability to collect revenue—and predict the revenue collected in a given fiscal period.

That second point is really important to distinguish between types of government entities. For example, many US states have balanced budget amendments which prohibit the state as a whole from performing any sort of deficit spending. The US government does not, though a lot of people think this would be a good idea. (It's a terrible idea.)

It's not required that a government have a fiat currency to engage in deficit spending, nor is it required that the government set its own tax rates. All that's required is the ability to set spending levels distinct from (or exceeding) revenue.

How does it really work? The plan for the US economy is to grow. If it grows, more people will work. If more people work, they'll buy more things and more dollars will circulate. The more dollars that circulate, the more tax revenue will come in—even if tax rates stay the same.

Who loans the US government this money? That's a good question!

What is the Debt? What is the Deficit?

The federal government deficit is the current gap between the money brought in as revenue and the money going out as spending. The federal government debt is the cumulative amount of money borrowed. You probably have to incur debt to cover deficit spending, but a deficit can be temporary while a debt may stick around for a while.

Why does a budget deficit occur? Because a government spends more than it brings in. Why? Either deliberately or because revenues were smaller than expected. This could happen to a country, a province or state, a city, or any municipality.

What is Deficit Financing?

What happens when a government spends money it doesn't have? It has to get that money somewhere. This is deficit financing, and it happens in one of two ways. Either the government borrows money (by selling bonds or taking out some other kind of loan) or it prints more money.

What is Sovereign Currency?

The US Dollar is a sovereign currency. A sovereign currency is a unit of exchange completely under the control of a single issuing authority (in this case US Treasury and the Federal Reserve).

The dollar is also a fiat currency, not tied to an underlying asset such as gold or silver. Because of this, The Fed can control the number of dollars circulating as well as the interest rates banks pay for their reserves (too complicated to go into).

That manages the supply side of dollars. The only problem is that having a lot of dollars available to circulate in the economy (hopefully at a good velocity) is that those dollars only circulate when they get spent.

When those dollars don't get spent on groceries, clothes, movies, appliances, vacations, meals, or other consumer goods, you have a demand side slowdown, by definition.

That's what we have in the US right now; that's what we've been having for the past few years.

In a demand side slowdown, you either wait it out (eventually people will find jobs or "exit the workforce", if you care for euphemisms) or you find some entity which is willing to spend money, hopefully in ways where those dollars have a good velocity, and you grow your way back into prosperity.

You need an entity which either has plenty of money to spend (cash reserves) or can borrow money at an attractive interest rate AND which is willing to spend that money.

It's kind of like me saying "I have a job offer to write software for the pharmaceutical industry. Maybe I should borrow $100 to buy a nice computer because I can make $200 every paycheck and pay off that loan very quickly." (It's not exactly like that, but it's kind of like that.)

That's the position of the US Government, which has its own sovereign currency (controls the number of dollars) and can borrow at a fantastically low interest rate (can control the rate of return for T-bills, but that's too complicated to understand). In other words, when no one else has cash available to circulate (demand side slowdown), a modern 21st century economy needs a countercyclical entity willing to borrow money to circulate through the economy to help restaurants and grocery stores and appliance stores and clothing stores bring in more revenue and pay their employees who are going to spend their paychecks on mortgages and gasoline and soccer leagues for their kids and pet food and haircuts and everything else that adds up to the GDP.

Why Does the Government Have a Spending Deficit?

Deficit spending by the US government is defined by:

1. A budget process which allocates more money to spend than it predicts will be received in tax revenue (unlike an accidental bank overdraft)
2. An approved borrowing limit which the US Treasury cannot exceed without authorization
3. The ability to create US dollars by printing more of them or to destroy them (fiat currency)

Why does the government use deficit spending? Because it can.

That's a simplistic answer. The real answer is because borrowing money at a low rate to spend wisely is an investment. Think about this: who's in the market for an aircraft carrier? Not many businesses would or could buy one.

If no one buys an aircraft carrier, think of how many people would lose their jobs. You have people who do everything from make and paint the steel to install light fixtures and design computer systems for aircraft carriers.

(You can argue whether the world needs another aircraft carrier, but apply the same argument to building airports or bridges, maintaining freeways, funding technology infrastructure, or even sending in the National Guard to help with disaster preparation, rescue, and cleanup. For insights on government spending efficiency, see why government IT projects often fail.)

If every dollar the government spent had to come from a financial reserve—savings, in fact—then the government would have a huge pile of money just sitting around, doing nothing. Can you think of better uses of that money?

(Sure, buying $600 hammers to sit around in a warehouse somewhere is a poor use of money, but that's a matter of waste and not an economic principle.) That money could just as easily go to development of alternative fuels and batteries, scientific research, even loans to small businesses. In other words, investments in the country.

If the cost of borrowing that money is low and if the expected return of the investment is positive, it's a good investment. (Again, the discussion is about an idealized principle. Getting rid of wasteful spending only improves the investment and expected rate of return.)

What's the right way to spend the money? Get it in circulation where the velocity of that money is positive. For more on managing finances and understanding financial metrics, see our guide on understanding financial statements.

A Sovereign Currency During an Economic Downturn

The relationship between deficit spending and inflation depends on economic slack. According to NBER Working Paper 26739, deficit spending during periods of high unemployment and idle productive capacity has limited inflationary effect. However, IMF Staff Discussion Note (SDN/2020/05) documents that spending during near-full-employment periods carries elevated inflation risk. This explains the actual outcomes: large deficits in 2020-2021 (pandemic period with unemployment peaking at 14.7% in April 2020 per FRED) produced modest initial inflation, while continued spending in 2022-2023 coincided with inflation exceeding Fed targets at 3-4%.

As of 2025, Congressional Budget Office Long-Term Budget Outlook 2024-2034 projections show rising interest costs on federal debt due to sustained higher rates. The debt service burden (interest payments as % of federal revenue) has risen to post-WWII highs at 2.4% of GDP, making debt trajectory a critical fiscal concern despite the US's sovereign currency advantages.

Remember that debt doesn't have to be a bad thing; debt held by the public means individuals loaning the government money. That's sort of like them spending the money directly, if those dollars go to people who will spend it. These aren't special funds, but they're funds with a special trust in the government's stability.

Is government debt bad? That depends on the government and the current economic state. Is the government stable? How much does it cost to service that debt? What's the interest rate of that debt? What's the ratio of debt to assets or tax revenue or productivity at full employment?

Debt service is an interesting topic—it's a place where conservative economic policy is useful. There is a point at which it's possible to have so much debt that all of your revenue goes to paying the interest on that debt. You can see that in a lot of municipalities which have crippling pension costs, where they're spending more money paying people not to work than they can spend paying people to work. (Note that municipalities don't have their own sovereign currencies and a lot of them have balanced budget amendments. This is similar to constraints that can lead to government furloughs.)

Countercyclical Monetary Policy

To make all of this work at the federal level, fiscal policy has to be countercyclical. In other words, when the economy is slow, the government acts as spender of last resort, injecting money into the economy hopefully in places where those dollars have a high velocity. When the economy is high, the government should pay down its debt (obviously the cost of borrowing has gone up, so it shouldn't be borrowing) and even consider socking away some reserves for a rainy day. (Drop the Debt to GDP ratio so that that ratio is healthier when the business cycle turns again.)

This is the economic model that's guided modern economies since at least the Great Depression in the US. Keep in mind that most of the (capitalist) economics in the 20th century has tried to answer the question "How can we prevent another Great Depression?" The good news is that this economic model fits the data really well. Where it doesn't (Greece, Portugal), you can see the damage that not having a sovereign currency can do.

This is a complicated subject and parts of it seem counter-intuitive at first, because these ideas are very different from how you manage your own budget. Keep in mind that you can't compare federal spending to your household spending, because you don't have a sovereign, fiat currency and you don't control the global dollar supply. (Whenever someone tries to answer the question "How does the government work?" by comparing it to a family or small business, walk away. You're only going to get a misleading answer.) Because the US government does have a sovereign currency and can control the global dollar supply, it has many more options for managing both the number of dollars in circulation globally (monetary policy) and how and when those dollars get spent (fiscal policy). One of those options is deficit spending—because it's cheap to borrow money from the entity which can create infinite amounts of money.

The most important thing to remember for fiscal policy is the velocity of money; you can work out a lot of the rest of the economics from that.

Modern Monetary Theory (MMT)

Modern Monetary Theory represents a newer school of economic thought that challenges traditional views on government deficit spending. MMT proponents argue that for countries with sovereign currencies (like the United States), the constraints on government spending are different than for households or businesses.

According to MMT, a government that controls its own currency and borrows in that currency cannot run out of money in the traditional sense. The real constraint is not financial but real: whether the economy has the productive capacity (labor, resources, infrastructure) to meet the demand created by government spending. This fundamentally shifts the debate from "Can we afford it?" to "Do we have the real resources to produce it?"

MMT perspectives suggest that:

• Inflation, not insolvency, is the primary risk of excess deficit spending
• Full employment, not balanced budgets, should be the primary fiscal policy goal
• Governments should spend what they need to spend in order to reach full employment, then tax to control inflation
• The order matters: spend first, tax second—not the reverse

Critics of MMT argue it oversimplifies the complex relationship between money supply, inflation expectations, and currency value. However, 2025's experience with years of large deficits and stimulus yet persistent inflation above Fed targets in many periods has given MMT adherents evidence for their arguments about the non-linear relationship between spending and inflation.

Why Deficit Spending Matters in 2026

As of February 2026, deficit spending remains at the center of economic and political debates for several critical reasons:

Rising Interest Costs: The Federal Reserve's aggressive rate hikes to combat inflation (from near-zero to 5.25-5.50% in July 2023) have dramatically increased the cost of servicing government debt. Interest payments now consume over 15% of federal revenue (\$892 billion in FY2024 per CBO), approaching the record set after World War II.

Inflation Concerns: After years of debate about whether deficits cause inflation, 2022-2025 provided a real-world test. The consensus among economists remains that context matters. Large deficits during the pandemic (with unemployment peaking at 14.7% in April 2020 per FRED data) produced modest initial inflation, while continued spending as the economy approached full employment contributed to inflation exceeding Fed targets at 9.1% in June 2022.

Debt Trajectory: With federal debt now exceeding 123% of GDP, the question isn't whether the US can borrow (it clearly can, as a sovereign currency issuer), but whether the trajectory is sustainable given rising interest costs and demographic pressures (Social Security, Medicare).

Political Polarization: Deficit spending has become intensely partisan since at least the 1970s (see the Tea Party movement for a prominent example). The same politicians who support tax cuts that increase deficits often oppose spending increases that do the same, and vice versa. This inconsistency makes coherent fiscal policy difficult.

Global Context: Other major economies face similar challenges. Japan's debt-to-GDP exceeds 264% per IMF data, European nations debate fiscal rules under the Stability and Growth Pact, and developing countries struggle with dollar-denominated debt. The US's unique position as reserve currency issuer (59% of global reserves per IMF) provides advantages but also global responsibilities.

In 2026, deficit spending remains a powerful tool, but its effectiveness depends on economic conditions, what the money funds, and whether policymakers use it countercyclically (spending during downturns, restraining during booms) rather than procyclically (spending constantly regardless of conditions).