U.S. National Debt Daily Interest Expenditure Approximately $3 Billion
The net interest expenditure on U.S. national debt is currently about $3 billion per day, annualized over $1 trillion.
According to CBO data, net interest for the first nine months of fiscal year 2026 has reached $857 billion, an increase of about $100 billion compared to the same period last year, driven by the total debt and interest rates raising costs.
Funds continue to flow towards interest payments on national debt, with fiscal space being squeezed by interest under event-driven circumstances, benefiting debt holders while discretionary spending and deficit control are under pressure.
Source: Public Information
ABAB AI Insight
The U.S. federal debt has rapidly expanded over the past decade, rising from about $20 trillion before the pandemic to nearly $40 trillion, compounded by a significant increase in average financing costs following the Federal Reserve's interest rate hikes, with interest expenditures jumping from about $345 billion in 2020 to the current annualized trillion-dollar level.
Resource allocation is forced to prioritize interest payments, motivated by the need to maintain debt rollover and market confidence, while limiting other spending space, creating a path dependency of "borrowing new to pay old + interest accumulation."
Similar to Japan's long-term high debt and low interest rate pressure, or emerging markets facing high-interest debt crises; the U.S. is currently in a phase of coexisting high debt and high interest rates, with interest becoming one of the largest single expenditures.
Essentially, this is a concentration of capital: interest payments lock fiscal resources to existing debt holders, and when both debt scale and interest rates rise, new output is consumed by interest, reducing the fiscal multiplier.
ABAB News · Cognitive Law
The product of debt scale and interest rates determines the speed of interest consumption.
Interest is the most rigid fiscal expenditure.
The endpoint of borrowing new to pay old is a budget dominated by interest.