US national debt crosses $40T as annual interest expense reaches $1.25T
Resolved · macro data · Occurred · Assessed · 1 sources
This assessment is dated 2026-09-28. Check what remains unresolved below before relying on it.
What changed relative to expectations?
Higher net issuance supply to finance $1.25 trillion in annual interest service widens Treasury term premia and depresses TLT valuation.
| Question | What the evidence establishes |
|---|---|
| What was reported? | Reported factUnited States national debt has surpassed $40 trillion. |
| What else was confirmed? | Reported factAnnual federal debt interest costs reached $1.25 trillion in 2025. |
| Does the valuation support acting? | UnknownRequires applying the change to specific holdings. |
| What would change the assessment? | UnknownUS Treasury Quarterly Refunding Announcement and auction tail metrics — Bid-to-cover ratios falling below 2.3x on 10Y and 30Y Treasury auctions. |
What would this event cost your holdings?
Apply your own hypothetical returns to current holding values. The calculator does not infer security effects from this event.
Test this event against my holdingsPublic research record
Research framework · page evidenceCompleted event assessment
higher 10Y yield via term-premium repricing and auction supply pressure
| Type | Claim | Scope |
|---|---|---|
| Assumption | United States national debt has surpassed $40 trillion. | 2026-09-28 |
| Interpretation | higher 10Y yield via term-premium repricing and auction supply pressure | TLT |
Countercase, invalidators, and sources
Treasury auction demand from foreign official and institutional accounts remains strong, absorbing debt supply without steepening the long end.
- · US Treasury Quarterly Refunding Announcement and auction tail metrics — Bid-to-cover ratios falling below 2.3x on 10Y and 30Y Treasury auctions.
- The United States Debt Just Passed an Auspicious Milestone · 2026-09-26
What remains unresolved
- Base path
- Annual debt service near $1.25 trillion cements structural Treasury supply, keeping 10Y yields anchored above 5.00%.
- Adverse path
- Auction tails force primary dealers to absorb excess supply, triggering broad bond sell-offs and upward yield spikes.
- Supportive path
- Treasury auction demand from foreign official and institutional accounts remains strong, absorbing debt supply without steepening the long end.
- · US Treasury Quarterly Refunding Announcement and auction tail metrics — Bid-to-cover ratios falling below 2.3x on 10Y and 30Y Treasury auctions.this week
Evidence
- The United States Debt Just Passed an Auspicious Milestone2026-09-26
“U.S. national debt has surpassed $40 trillion with interest costs hitting $1.25 trillion in 2025.”
Supports: U.S. national debt has surpassed $40 trillion with interest costs hitting $1.25 trillion in 2025.