Federal deficit reaches $1.97 trillion with one month of the fiscal year left

The federal budget deficit for August shrank to $167 billion, largely on calendar shifts in benefit payments^5,6. That left the cumulative fiscal 2026 deficit at $1.966 trillion through eleven months, effectively flat against the same period a year earlier^5,6. The Congressional Budget Office’s monthly update put the eleven-month total $6 billion below last year’s².

The monthly narrowing was steep. One account put the August improvement at 52% and noted receipts rose 5% to $360 billion⁴. Unadjusted outlays fell 24% to $527 billion, and interest payments on the federal debt fell by $14 billion⁷. Tax receipts for the year to date are up $154 billion on the same period last year⁸, while the Defense Department’s spending rose by $41 billion, or 5%, on higher military personnel and research and development costs⁹.

Why it matters to investors

The composition is the story rather than the monthly swing. Interest costs on the debt have now surpassed the entire defense budget over the eleven months, on the CBO’s accounting¹. That makes one of the largest lines in the budget a function of the yield curve rather than of any appropriation vote.

The CBO still projects a full-year 2026 deficit of about $1.9 trillion, accounting for roughly 5.8% of GDP³. A deficit of that size sets the supply of Treasury paper the bond market has to absorb, and it does so in a week when the Federal Reserve is expected to tighten. The increase in spending was driven mainly by mandatory programmes, which are the part of the budget no annual appropriation controls⁸.

What to watch

September closes the fiscal year, and the final month decides whether the total lands at or above $2 trillion^1,3. Reuters described the year-to-date figure as flat at $1.97 trillion, so the distance between the CBO’s $1.9 trillion projection and the running total is already narrow^3,5.

The interest line is the one to track month by month. It fell by $14 billion in August, which shows the series is not a one-way ratchet, but it did so in a month when unadjusted outlays fell 24% overall⁷. Receipts are the offsetting variable: up $154 billion for the year, and up 5% in August alone to $360 billion^4,8. Whether that receipts growth is enough to hold the annual total near the CBO’s projection is the arithmetic the September statement will settle^2,3.