CBO Projects Debt Could Reach 222% of GDP by 2056
The Congressional Budget Office warns that interest rates 1 percentage point above its baseline would push federal debt to 222% of GDP by 2056, with
The Congressional Budget Office projects federal debt could reach 222% of GDP by 2056 if interest rates rise 1 percentage point above its baseline. The agency released its analysis, titled 'Projections of Deficits and Debt Under Alternative Scenarios for Interest Rates and the Budget,' on September 24, 2026.
Under this higher-rate scenario, the debt level would be 47 percentage points of GDP larger than in the CBO's extended baseline. The primary deficits would average 2.3 percent of GDP from 2026 to 2056, which is 0.2 percentage points larger than the baseline average.
Baseline Comparison
Under the CBO's extended baseline, debt held by the public is projected to rise from 101 percent of GDP in 2026 to 175 percent by 2056. Primary deficits would average 2.1 percent of GDP over the 2026-2056 period. The average annual GDP growth in this baseline is 3.8 percent, with an average interest rate on federal debt of 4 percent.
Alternative Scenarios
The analysis also modeled a scenario where the debt-to-GDP ratio is held at its 2026 level of 101 percent. Achieving this stability would require primary deficits to average just 0.2 percent of GDP from 2026 to 2056. This is 1.9 percentage points smaller than the average primary deficit in the extended baseline.
Interest and Deficit Impacts
The higher interest rate scenario shows a dramatic escalation in borrowing costs. Interest spending would rise from $1 trillion in 2026 to $10.6 trillion by 2056. This represents an additional $35.7 trillion in interest payments through 2056 compared to the baseline. By mid-century, interest would consume roughly 60 percent of federal revenue.
Deficits would swell from 5.8 percent of GDP in 2026 to 14 percent in 2056. The debt-to-GDP ratio would climb steadily.
| Metric | 2026 | 2036 | 2056 |
|---|---|---|---|
| Debt-to-GDP Ratio | 101% | 124% | 222% |
| Deficit as % of GDP | 5.8% | 7.5% | 14% |
| Interest Spending | $1 trillion | $2.5 trillion | $10.6 trillion |
Mechanism and Outlook
Rising debt and interest rates create a dangerous feedback loop. As debt rises, investors demand a higher term premium to compensate for the additional risk. This leads to higher interest spending and more borrowing. Higher debt can also slow economic growth, which would boost debt further and contribute to a vicious debt spiral. Under the alternate path, GDP would reach $93 trillion in 2056, which is $2.7 trillion less than the February baseline estimate.
The CBO indicates that deficit reduction today is the best way to put downward pressure on interest rates. It would signal fiscal responsibility to bondholders and put the debt on a sustainable path.
