Economy · · 2 min read
Editor: Bohdan S.
US budget deficit hits $1.99 trillion in 2026 as interest costs top $1tn
America's shortfall grew 12% in fiscal 2026 to its widest in five years, with interest on the debt now the fastest-growing bill and bond yields near 24-year highs.
The short answer
The US government spent $1.992 trillion more than it collected in the fiscal year to September 2026, up 12% from $1.775 trillion a year earlier, Treasury data showed. It is the third-largest gap on record. Rising interest costs drove about two-thirds of the increase, a concern for bond markets already pushing yields higher.
What happened
The Treasury Department's year-end figures, released Friday, put the fiscal 2026 deficit at $1.992 trillion. Only the pandemic years of 2020 and 2021 were worse, and this marks the 25th year running without a surplus. Both receipts and outlays hit records. Social Security cost nearly $1.7 trillion and Medicare almost $1.1 trillion, while net interest passed $1 trillion, up from $970 billion. Gross interest reached a record of about $1.36 trillion. Individual income taxes brought in over $2.8 trillion, roughly 7% more, but corporate tax receipts fell by about $70 billion to $381 billion after last year's tax cuts. September alone showed a $27 billion gap.
What it means
The striking part is not the size of the deficit but what is driving it. Interest costs rose by $144 billion over the year, according to figures summarized by InvestingLive, which accounts for roughly two-thirds of the $217 billion widening. In other words, the government is increasingly borrowing just to pay for past borrowing, and that bill grows on its own as old debt is refinanced at today's higher rates.
This feeds a loop that bond investors watch closely. More borrowing means more Treasury bonds to sell, and buyers demand higher yields to absorb them. CNBC noted that 10-year and 30-year yields hit 24-year highs last week, with the 10-year near 5.1%, versus the Congressional Budget Office's assumption of a 4.3% average over the next decade. The CBO estimates that if rates run half a point above its forecast, ten-year deficits come in $1.9 trillion higher.
Tariffs have not closed the gap. Gross customs duties hit a record, a Treasury official said, but refunds ordered after the Supreme Court struck down many of the levies sent billions back to importers. In September, refunds swallowed about 77% of gross customs receipts.
Politics makes a quick fix unlikely. Treasury Secretary Scott Bessent has argued the US can grow its way out of the debt and has set a goal of a deficit under 4% of GDP. CNBC estimates this year's figure at about 6.2% of GDP, and the Committee for a Responsible Federal Budget reckons balancing the budget through growth alone would need a decade of 7.2% annual growth.
The bull case
Receipts reached a record, and individual income tax revenue grew about 7%, showing a still-solid economy. High yields are also drawing buyers to Treasuries, and the debt is not yet at crisis levels. If growth stays firm, oil prices ease or a divided Congress after the midterms finds a compromise, borrowing pressure could fade and long-term yields could settle lower, which would relieve mortgages and corporate borrowers.
The bear case
Interest is now growing faster than almost any other spending line, and it compounds as debt rolls over at higher rates. With heavy Treasury supply competing against record AI-related corporate bond issuance, investors may keep demanding higher yields. That could keep mortgage rates near 7.5%, raise borrowing costs across the economy and push future deficits even wider, a self-reinforcing cycle the CBO has warned about.
Why it matters
For investors
A wider deficit means more Treasury supply, which tends to keep long-term yields elevated and weigh on rate-sensitive assets like long-dated bonds, homebuilders and highly indebted growth companies.
The wider context
Persistent deficits help keep borrowing costs high for households, from mortgages to car loans, and raise the odds of future tax rises or spending cuts that could touch benefits people plan around.
Market impact
| Asset (ticker) | Possible move | Timeframe | Why |
|---|---|---|---|
| US 10-year Treasury yield | ↑ Up | Long term | Larger deficits mean more bond supply, so investors may keep demanding higher yields. |
| iShares 20+ Year Treasury Bond ETF (TLT) | ↓ Down | Long term | Long-dated bond prices fall when yields rise on heavier government borrowing. |
| iShares U.S. Home Construction ETF (ITB) | ↓ Down | Short term | Mortgage rates track Treasury yields, which could keep pressure on housing demand. |
The FinPrism newsroom's view of how these figures could move, as of . It is general news commentary, not a recommendation to buy, sell or hold anything.
Frequently asked questions
How big was the US budget deficit in 2026?
The deficit for fiscal 2026, which ended on September 30, was $1.992 trillion, according to the Treasury Department. That is about 12% more than the $1.775 trillion gap in fiscal 2025 and the third-largest on record, behind only 2020 and 2021.
Why is US interest on the debt rising so fast?
The government keeps borrowing and must refinance maturing bonds at today's higher rates. Gross interest reached about $1.36 trillion in fiscal 2026, up $144 billion, and net interest topped $1 trillion. That rise explains about two-thirds of this year's wider deficit.
How does the deficit affect mortgage rates?
Mortgage rates move with the 10-year Treasury yield. When the government borrows more, investors may require higher yields to buy its bonds, which can push mortgage rates up. The 10-year yield was around 5.1% this week, with 30-year mortgage rates near 7.5%.
Sources: CNBC, CNBC, InvestingLive
How this was made: written with AI assistance from the sources listed above, following our editorial standards.
