Average interest rate
Treasury Bills
Short-term securities that mature in one year or less. Their average rate tracks the front end of the yield curve closely and moves fastest when policy rates change.
Latest (Aug 2026)
3.79%
▲ +0.030 pp MoM
Year-over-year
▼ -0.495 pp
vs. Aug 2025
13-year low
0.04%
Jun 2021
13-year high
5.45%
Nov 2023
This is an average, not today's rate. For what bills are selling at right now, see Treasury bill rates today — 3.88% on the 4-week and 4.12% on the 13-week, coupon equivalent.
Treasury Bills — average rate history
Monthly, Jan 2013 – Aug 2026.
Download: rates-treasury-bills.csv · CSV · public domain
Last 24 months
| Month | Avg. rate | MoM |
|---|---|---|
| Aug 2026 | 3.788% | ▲ +0.030 pp |
| Jul 2026 | 3.758% | ▲ +0.052 pp |
| Jun 2026 | 3.706% | ▲ +0.016 pp |
| May 2026 | 3.690% | ▼ -0.006 pp |
| Apr 2026 | 3.696% | ▼ -0.006 pp |
| Mar 2026 | 3.702% | ▼ -0.018 pp |
| Feb 2026 | 3.720% | ▼ -0.040 pp |
| Jan 2026 | 3.760% | ▼ -0.100 pp |
| Dec 2025 | 3.860% | ▼ -0.123 pp |
| Nov 2025 | 3.983% | ▼ -0.092 pp |
| Oct 2025 | 4.075% | ▼ -0.112 pp |
| Sep 2025 | 4.187% | ▼ -0.096 pp |
| Aug 2025 | 4.283% | ▼ -0.031 pp |
| Jul 2025 | 4.314% | ▲ +0.008 pp |
| Jun 2025 | 4.306% | ▼ -0.010 pp |
| May 2025 | 4.316% | ▼ -0.019 pp |
| Apr 2025 | 4.335% | ▼ -0.024 pp |
| Mar 2025 | 4.359% | ▼ -0.040 pp |
| Feb 2025 | 4.399% | ▼ -0.056 pp |
| Jan 2025 | 4.455% | ▼ -0.131 pp |
| Dec 2024 | 4.586% | ▼ -0.155 pp |
| Nov 2024 | 4.741% | ▼ -0.160 pp |
| Oct 2024 | 4.901% | ▼ -0.253 pp |
| Sep 2024 | 5.154% | — |