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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteA deficit is the amount spending exceeds revenue over a period; debt is the amount still owed at a particular point in time. For the U.S. federal government, borrowing generally finances deficits, which means annual deficits tend to add to debt held by the public—but the two measures are not interchangeable.
Deficit and debt, side by side
The simplest distinction is flow versus stock: a deficit measures what happens during a period, while debt measures an outstanding balance on a date. In federal budget terms, a deficit occurs when outlays exceed receipts over a fiscal year. Debt is the amount the government has borrowed and still owes.
| Measure | Deficit | Debt |
|---|---|---|
| Type | Flow | Stock |
| Time reference | A period, usually a fiscal year | A point in time |
| What it measures | Spending or budget outlays in excess of revenue or budget receipts | Amounts borrowed and still owed |
| How they relate | Annual shortfalls are generally financed through borrowing | Reflects accumulated borrowing and can include different categories of federal debt |
The U.S. Government Accountability Office (GAO) defines a deficit as the amount by which government spending exceeds revenues for a given period, usually a fiscal year. A budget deficit more specifically means budget outlays exceed budget receipts for that period. GAO’s federal budget glossary gives these definitions.
How a deficit affects federal debt
When the federal government spends more than it collects, it generally borrows to cover the gap. GAO explains, “To finance a budget deficit, the government borrows from the public.” A surplus reverses the direction: excess funds are used to reduce debt held by the public. GAO’s federal debt FAQ says annual deficits or surpluses generally approximate the net annual change in debt held by the public.
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“Generally” matters. A deficit is a fiscal-year flow, while debt is a balance at a date, and federal debt includes more than debt held by the public. So a deficit does not translate mechanically into an identical change in every measure of total federal debt.
Who holds federal debt?
Federal debt includes Treasury obligations held in two broad categories:
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- Debt held by the public: held by investors and entities outside the federal government.
- Intragovernmental holdings: owed to other federal government accounts.
Because these categories identify who holds the obligations, “debt held by the public” and total federal debt are not the same measure. GAO discusses these categories in its federal debt FAQ.
Recent U.S. federal figures—and what they measure
GAO’s FY 2025 debt audit, published January 20, 2026, reported federal debt of $37.6 trillion as of September 30, 2025, an outstanding balance that was $2.2 trillion above FY 2024. Separately, GAO reported a $1.8 trillion federal budget deficit for FY 2025. The first figure is debt on a specific date; the second is a shortfall over a fiscal year. They are not two ways of stating the same number. See GAO’s FY 2025 debt audit summary.
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- American Economy
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For comparison, GAO reported a $1.8 trillion federal deficit for FY 2024, including an approximately $950 billion primary deficit and approximately $882 billion in net interest spending. These are FY 2024 figures, not a later fiscal year’s deficit. GAO’s FY 2024 debt audit summary provides that breakdown.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why the distinction matters
A deficit tells you whether the government ran a shortfall or surplus over a defined period. Debt tells you how much it owes at a particular date. When comparing figures, check both the time frame and the measure: a fiscal-year deficit should not be compared as if it were a point-in-time debt balance, and a debt figure should identify whether it means debt held by the public or another federal debt measure.
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