US Treasury Raises Q3 Borrowing Estimate to $739 Billion, Citing Weaker Cash Flows

What Treasury Announced

In a press release issued August 3, 2026, the US Department of the Treasury published its current estimates of privately-held net marketable borrowing for two quarters: July–September 2026 and October–December 2026. For the current (July–September) quarter, Treasury expects to borrow $739 billion in privately-held net marketable debt, assuming an end-of-September cash balance of $950 billion. Treasury's own footnote to the release defines privately-held net marketable borrowing precisely: it excludes rollovers, or auction "add-ons," of Treasury securities held in the Federal Reserve's System Open Market Account (SOMA), but it does include financing required because of SOMA redemptions. In plain terms, this is the amount of new debt Treasury needs private investors — not the Federal Reserve — to absorb.

Why the Estimate Moved Higher

The $739 billion figure is $68 billion above what Treasury projected for the same quarter back in May 2026. Treasury attributed the revision primarily to lower projected net cash flows — a weaker gap between what the government expects to collect and what it expects to spend over the quarter — partially offset by a higher-than-assumed cash balance at the start of the quarter. Treasury's release goes a step further and isolates that cash-balance effect: excluding the higher-than-assumed beginning-of-quarter cash balance, the underlying borrowing estimate for the current quarter is actually $87 billion higher than what was announced in May, a somewhat larger revision than the $68 billion headline number suggests once the cash-timing effect is stripped out.

The Fourth-Quarter Outlook

For the following quarter, October–December 2026, Treasury projected $628 billion in privately-held net marketable borrowing, assuming the cash balance ends the year at $850 billion — $100 billion lower than the assumed close of the current quarter. Treasury did not publish a prior comparison figure for this quarter in the release, since it is the first official estimate for that period.

How the Second Quarter Actually Came In

Treasury also reported actual results for the April–June 2026 quarter: privately-held net marketable borrowing came in at $190 billion, against a cash balance of $919 billion at quarter's end. In May, Treasury had estimated borrowing of $189 billion and assumed an end-of-June cash balance of $900 billion. The $1 billion increase in actual borrowing versus the May estimate resulted mainly from the higher-than-assumed ending cash balance, partially offset by higher net cash flows during the quarter. Isolating that cash-balance effect again, Treasury said actual borrowing was in fact $18 billion lower than the May estimate once the extra cash-balance build is excluded — meaning the underlying fiscal picture for the second quarter came in somewhat better than projected, even though the headline borrowing number looks almost unchanged.

What Comes Next

This release is a preview of the numbers, not the full financing plan. Treasury said additional financing details relating to its Quarterly Refunding — including the specific sizes of upcoming bill, note and bond auctions — will be released at 8:30 a.m. on Wednesday, August 5, 2026. That announcement, together with the Treasury Borrowing Advisory Committee's own recommendations, will determine how the higher borrowing need gets distributed across different maturities, which matters for how the extra supply is absorbed across the yield curve.

Reader Q&A

Q: What exactly does "privately-held net marketable borrowing" measure? A: It's the amount of new debt the Treasury needs private investors — banks, funds, foreign governments, individuals — to buy, net of securities that mature. It specifically excludes debt rollovers held by the Federal Reserve's SOMA account, so it isolates the borrowing burden that falls on the private market rather than the Fed.

Q: Why did the July–September estimate rise by $68 billion from May? A: Treasury cited lower projected net cash flows — a weaker gap between expected receipts and expected spending — partly offset by a higher starting cash balance. Stripping out the cash-balance timing effect, the underlying increase is actually $87 billion.

Q: How did the actual April–June borrowing compare with what was forecast? A: Treasury borrowed $190 billion, just $1 billion above the $189 billion it had estimated in May — though after adjusting for a higher ending cash balance, the underlying number was actually $18 billion better than forecast.

Q: What happens on August 5, 2026? A: Treasury releases its full Quarterly Refunding announcement, specifying the exact sizes of upcoming bill, note and bond auctions needed to meet the borrowing estimate — the detail that bond markets watch most closely.

Q: Why do investors pay attention to this figure at all? A: A larger borrowing program means more Treasury securities for the private market to absorb. All else equal, a bigger supply of bonds competing for investor demand tends to push yields higher across the curve, which is why bond markets react to shifts in Treasury's quarterly estimates even before the specific auction sizes are known.