Washington’s Trillion-Dollar Deficits: How Sustainable Is U.S. Debt?

Deficits in an age of prosperity

The U.S. government’s deficit remains alarmingly high even in a time of moderate growth and low unemployment. The Congressional Budget Office (CBO) projects a federal deficit of $1.7 trillion in FY 2025, roughly 6 percent of GDP, with no major recession in sight. Persistent deficits during expansionary years mark a shift in fiscal norms—reflecting aging demographics, defense spending, and structural entitlement costs.

Table 1. U.S. Federal Finances Snapshot

Metric202320242025 (f)
Federal Deficit ($ T)1.71.61.7
Debt Held by Public (% GDP)9799101
Interest Payments ($ B)659870930
Nominal GDP Growth (%)5.94.33.1

Sources: CBO, U.S. Treasury, BEA.

Table 2. Global Context: Public Debt (% GDP)

Country20192025 (f)
United States80101
Canada3173
Japan238252
Germany5965

Source: IMF Fiscal Monitor 2025.

What keeps the system stable

Despite ballooning debt, U.S. Treasury securities remain the world’s benchmark “safe asset.” Global investors continue to absorb issuance at modest spreads, aided by the dollar’s dominance and strong demand from pension and insurance funds.

Risks on the horizon

The danger lies in compounding interest costs. If rates remain near 4 percent, net interest could exceed defense spending by 2026. Fiscal crowding-out may follow, limiting policy flexibility in the next downturn.

Strategic takeaway

Executives should assume higher baseline yields and slower fiscal stimulus capacity. Infrastructure and climate-transition initiatives will depend increasingly on private-public financing structures rather than direct federal outlays.