September 9, 2026 · last fitted close

1 month US Treasury rate

Fitted from Treasury bills alone on a bond-equivalent basis, because the zero curve is not fitted below one year.

Rate
3.742%
+0.5 bp on the day

Where it sits in 18 years

3.742% today
-0.009% low · Aug 31, 20155.954% high · Nov 9, 2023

Today’s rate is higher than 83.1% of the 4,508 trading days fitted since September 2, 2008. That is a count of days, not a position on the scale above: a rate can sit near the top of its range while only a few days ever reached it.

Every month since September 2, 2008

-1%0%1%2%3%4%5%6%Sep 30, 2008Sep 9, 2026Sep 30, 20081 month rate0.409%Oct 31, 20081 month rate0.177%Nov 28, 20081 month rate0.011%Dec 31, 20081 month rate0.049%Jan 30, 20091 month rate0.150%Feb 27, 20091 month rate0.163%Mar 31, 20091 month rate0.145%Apr 30, 20091 month rate0.045%May 29, 20091 month rate0.122%Jun 30, 20091 month rate0.136%Jul 31, 20091 month rate0.148%Aug 31, 20091 month rate0.098%Sep 30, 20091 month rate0.051%Oct 30, 20091 month rate0.022%Nov 30, 20091 month rate0.038%Dec 31, 20091 month rate0.037%Jan 29, 20101 month rate0.031%Feb 26, 20101 month rate0.089%Mar 31, 20101 month rate0.154%Apr 30, 20101 month rate0.144%May 31, 20101 month rate0.147%Jun 30, 20101 month rate0.153%Jul 30, 20101 month rate0.146%Aug 31, 20101 month rate0.143%Sep 30, 20101 month rate0.141%Oct 29, 20101 month rate0.133%Nov 30, 20101 month rate0.148%Dec 31, 20101 month rate0.082%Jan 31, 20111 month rate0.153%Feb 28, 20111 month rate0.118%Mar 31, 20111 month rate0.049%Apr 29, 20111 month rate0.017%May 31, 20111 month rate0.032%Jun 30, 20111 month rate0.014%Jul 29, 20111 month rate0.121%Aug 31, 20111 month rate0.012%Sep 30, 20111 month rate0.017%Oct 31, 20111 month rate0.010%Nov 30, 20111 month rate0.008%Dec 30, 20111 month rate0.010%Jan 31, 20121 month rate0.048%Feb 29, 20121 month rate0.059%Mar 30, 20121 month rate0.046%Apr 30, 20121 month rate0.073%May 31, 20121 month rate0.034%Jun 29, 20121 month rate0.044%Jul 31, 20121 month rate0.061%Aug 31, 20121 month rate0.083%Sep 28, 20121 month rate0.067%Oct 31, 20121 month rate0.083%Nov 30, 20121 month rate0.067%Dec 31, 20121 month rate0.024%Jan 31, 20131 month rate0.039%Feb 28, 20131 month rate0.072%Mar 28, 20131 month rate0.038%Apr 30, 20131 month rate0.022%May 31, 20131 month rate0.022%Jun 28, 20131 month rate0.022%Jul 31, 20131 month rate0.025%Aug 30, 20131 month rate0.017%Sep 30, 20131 month rate0.025%Oct 31, 20131 month rate0.027%Nov 29, 20131 month rate0.019%Dec 31, 20131 month rate0.022%Jan 31, 20141 month rate0.036%Feb 28, 20141 month rate0.037%Mar 31, 20141 month rate0.023%Apr 30, 20141 month rate0.011%May 30, 20141 month rate0.036%Jun 30, 20141 month rate0.017%Jul 31, 20141 month rate0.014%Aug 29, 20141 month rate0.017%Sep 30, 20141 month rate0.019%Oct 31, 20141 month rate0.013%Nov 28, 20141 month rate0.018%Dec 31, 20141 month rate0.023%Jan 30, 20151 month rate0.013%Feb 27, 20151 month rate0.013%Mar 31, 20151 month rate0.024%Apr 30, 20151 month rate0.003%May 29, 20151 month rate0.009%Jun 30, 20151 month rate0.013%Jul 31, 20151 month rate0.038%Aug 31, 20151 month rate-0.009%Sep 30, 20151 month rate0.002%Oct 30, 20151 month rate0.014%Nov 30, 20151 month rate0.078%Dec 31, 20151 month rate0.083%Jan 29, 20161 month rate0.230%Feb 29, 20161 month rate0.242%Mar 31, 20161 month rate0.129%Apr 29, 20161 month rate0.144%May 31, 20161 month rate0.214%Jun 30, 20161 month rate0.203%Jul 29, 20161 month rate0.203%Aug 31, 20161 month rate0.228%Sep 30, 20161 month rate0.160%Oct 31, 20161 month rate0.188%Nov 30, 20161 month rate0.297%Dec 30, 20161 month rate0.441%Jan 31, 20171 month rate0.464%Feb 28, 20171 month rate0.437%Mar 31, 20171 month rate0.722%Apr 28, 20171 month rate0.679%May 31, 20171 month rate0.810%Jun 30, 20171 month rate0.865%Jul 31, 20171 month rate0.995%Aug 31, 20171 month rate1.021%Sep 29, 20171 month rate0.956%Oct 31, 20171 month rate0.992%Nov 30, 20171 month rate1.117%Dec 29, 20171 month rate1.255%Jan 31, 20181 month rate1.306%Feb 28, 20181 month rate1.451%Mar 29, 20181 month rate1.469%Apr 30, 20181 month rate1.656%May 31, 20181 month rate1.762%Jun 29, 20181 month rate1.803%Jul 31, 20181 month rate1.906%Aug 31, 20181 month rate1.975%Sep 28, 20181 month rate2.108%Oct 31, 20181 month rate2.179%Nov 30, 20181 month rate2.262%Dec 31, 20181 month rate2.368%Jan 31, 20191 month rate2.388%Feb 28, 20191 month rate2.407%Mar 29, 20191 month rate2.417%Apr 30, 20191 month rate2.419%May 31, 20191 month rate2.320%Jun 28, 20191 month rate2.081%Jul 31, 20191 month rate2.018%Aug 30, 20191 month rate2.027%Sep 30, 20191 month rate1.797%Oct 31, 20191 month rate1.527%Nov 29, 20191 month rate1.584%Dec 31, 20191 month rate1.487%Jan 31, 20201 month rate1.525%Feb 28, 20201 month rate1.415%Mar 31, 20201 month rate0.070%Apr 30, 20201 month rate0.095%May 29, 20201 month rate0.127%Jun 30, 20201 month rate0.130%Jul 31, 20201 month rate0.090%Aug 31, 20201 month rate0.092%Sep 30, 20201 month rate0.085%Oct 30, 20201 month rate0.084%Nov 30, 20201 month rate0.074%Dec 31, 20201 month rate0.066%Jan 29, 20211 month rate0.046%Feb 26, 20211 month rate0.037%Mar 31, 20211 month rate0.012%Apr 30, 20211 month rate0.010%May 28, 20211 month rate0.007%Jun 30, 20211 month rate0.049%Jul 30, 20211 month rate0.042%Aug 31, 20211 month rate0.043%Sep 30, 20211 month rate0.055%Oct 29, 20211 month rate0.070%Nov 30, 20211 month rate0.075%Dec 31, 20211 month rate0.044%Jan 31, 20221 month rate0.045%Feb 28, 20221 month rate0.093%Mar 31, 20221 month rate0.179%Apr 29, 20221 month rate0.397%May 31, 20221 month rate0.713%Jun 30, 20221 month rate1.185%Jul 29, 20221 month rate2.112%Aug 31, 20221 month rate2.294%Sep 30, 20221 month rate2.716%Oct 31, 20221 month rate3.474%Nov 30, 20221 month rate3.836%Dec 30, 20221 month rate4.016%Jan 31, 20231 month rate4.520%Feb 28, 20231 month rate4.577%Mar 31, 20231 month rate4.739%Apr 28, 20231 month rate4.606%May 31, 20231 month rate5.152%Jun 30, 20231 month rate5.187%Jul 31, 20231 month rate5.364%Aug 31, 20231 month rate5.382%Sep 29, 20231 month rate5.387%Oct 31, 20231 month rate5.389%Nov 30, 20231 month rate5.374%Dec 29, 20231 month rate5.378%Jan 31, 20241 month rate5.361%Feb 29, 20241 month rate5.387%Mar 29, 20241 month rate5.358%Apr 30, 20241 month rate5.376%May 31, 20241 month rate5.373%Jun 28, 20241 month rate5.342%Jul 31, 20241 month rate5.375%Aug 30, 20241 month rate5.264%Sep 30, 20241 month rate4.775%Oct 31, 20241 month rate4.680%Nov 29, 20241 month rate4.588%Dec 31, 20241 month rate4.309%Jan 31, 20251 month rate4.314%Feb 28, 20251 month rate4.308%Mar 31, 20251 month rate4.315%Apr 30, 20251 month rate4.301%May 30, 20251 month rate4.309%Jun 30, 20251 month rate4.297%Jul 31, 20251 month rate4.357%Aug 29, 20251 month rate4.290%Sep 30, 20251 month rate4.094%Oct 31, 20251 month rate3.936%Nov 28, 20251 month rate3.912%Dec 31, 20251 month rate3.609%Jan 30, 20261 month rate3.684%Feb 27, 20261 month rate3.686%Mar 31, 20261 month rate3.692%Apr 30, 20261 month rate3.658%May 29, 20261 month rate3.684%Jun 30, 20261 month rate3.668%Jul 31, 20261 month rate3.685%Aug 31, 20261 month rate3.743%Sep 9, 20261 month rate3.742%

217 month ends. The high, low, mean and percentile above are computed over all 4,508 fitted days, not over these 217 points. Mean across the whole history is 1.352%.

The last 30 trading days

The 1 month US Treasury rate on each of the last 30 fitted trading days.
DateRate
Sep 9, 20263.742%
Sep 8, 20263.737%
Sep 4, 20263.726%
Sep 3, 20263.722%
Sep 2, 20263.746%
Sep 1, 20263.757%
Aug 31, 20263.743%
Aug 28, 20263.733%
Aug 27, 20263.710%
Aug 26, 20263.699%
Aug 25, 20263.697%
Aug 24, 20263.693%
Aug 21, 20263.691%
Aug 20, 20263.686%
Aug 19, 20263.682%
Aug 18, 20263.686%
Aug 17, 20263.693%
Aug 14, 20263.694%
Aug 13, 20263.674%
Aug 12, 20263.675%
Aug 11, 20263.693%
Aug 10, 20263.692%
Aug 7, 20263.684%
Aug 6, 20263.685%
Aug 5, 20263.673%
Aug 4, 20263.680%
Aug 3, 20263.691%
Jul 31, 20263.685%
Jul 30, 20263.675%
Jul 29, 20263.690%

Each date links to every family fitted on that day.

The other key rates

3 month6 month1 year2 year3 year5 year7 year10 year20 year30 year

Index levels before September 30, 2026 are back-tested. They were computed after the fact by applying the rules to historical data, which benefits from hindsight in the choice of rules, and an index cannot be invested in directly. Methodology v1.0 takes effect at that rebalance, when levels begin to be struck on the day; the rulebook is identical either way, and the version is published on every row.

A fitted curve is a fit, not a quote. Daily error averages 3.8 basis points across the history and reaches about 20 on the worst days, in December 2008, when the market was genuinely hard to fit one smooth curve to. Every curve page publishes its own fit error rather than burying it.

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Safe Rate™, Safe Rate Indices™ and the Safe Rate US Treasury Index™ are trademarks of Safe Rate, claimed through use in commerce and not registered. Third-party marks are the property of their owners, which are not affiliated with and do not endorse this data.

Curves are fitted from public Treasury data and carry fit error; figures are not a record of trading, and an index cannot be invested in directly. No claim of compliance with the IOSCO Principles for Financial Benchmarks is made or implied. Not investment advice, not an offer, and not a recommendation to buy or sell any security.