
US Debt Interest spending is rapidly increasing as the national debt goes past $39.4 trillion, putting even more strain on the government’s finances. The latest figures from the CBO estimate that US Debt Interest spending has become one of the fastest-growing expenses for the government, which currently has to pay $24 billion each week to service its debt.

As stated by the CBO, the US Treasury has been borrowing excessively to cover budget deficits for the period between January and September 2026, at a rate of $155 billion of new borrowing per month. With such borrowing increasing and interest rates being higher compared to those seen in previous periods, the cost of US Debt Interest is eating up more of the government expenditure.
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US Debt Interest Continues to Climb
The CBO said that during the time between October and June, the first nine months of fiscal year 2026, the government borrowed $1.39 trillion. In addition, the government incurred interest costs totaling $939 billion, which represents an increase of $100 billion, or 13%, over the same period of the previous year.
This dramatic rise is due to the effect of increased interest rates on the increasing level of debt. In the wake of the financial crisis of 2008, government borrowing has been much more expensive than it was before.
Another fact revealed by the report is that US Debt Interest surpasses the expenditures in many important areas within the US Government budget. Interest expenditures have been greater than those of the Department of Homeland Security, the EPA, the Small Business Administration, and other federal agencies combined.
CBO has projected that the interest outlay was approximately $20 billion more than the expenditure on the Defense Department in the same nine-month period.
Entitlement Spending Also Moves Higher
Despite an increase in interest payments, the major entitlement programs run by the government needed additional money.
An additional $62 billion was spent on Social Security as a result of greater payments and a greater number of recipients. An extra $58 billion was spent on Medicare due to an increase in enrollment and reimbursements. Spending on Medicaid grew by an additional $49 billion, or about 10%.
Unlike the expenditures for infrastructure, health care, education, or national defense, US Debt Interest is not used to finance any additional programs by the government. It only accounts for the borrowing cost of the existing debt.
A large number of economists have stated that as interest payments eat up more and more of the federal budget, it will be much harder for lawmakers to make decisions about budgets in the coming years. Higher taxes, lower expenditures, or debt financing may be needed to fund new projects, and this is why US Debt Interest is becoming an increasingly critical factor in financial circles, including crypto.
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