T-Bill Rates · Treasury Bills
17-Week (4-Month) Treasury Bill Rates
Every 17-week bill auction since October 2022: the rate it sold at, what $10,000 cost and earned, and when the next one is.
Latest 17-Week Auction
Wednesday, Sep 30, 2026
17-Week (4-Month) Bill
4.230%
investment rate · −2.1 bp vs prior auction · discount rate 4.115%
$10,000 cost
$9,863.98
$98.639764 per $100
Earns at maturity
$136.02
over 119 days
Matures
Feb 2, 2027
issued Oct 6, 2026
Bid-to-cover
2.89×
$75B sold
At the Sep 30, 2026 auction, the 17-week (4-month) Treasury bill sold at an investment rate of 4.230% (discount rate 4.115%). $10,000 of face value cost $9,863.98 and pays $10,000 on Feb 2, 2027, earning $136.02.
Highest on Record
5.542%
Oct 11, 2023
Lowest on Record
3.601%
Jan 7, 2026
A Year Ago
3.907%
Sep 24, 2025
Auctions Tracked
207
53 in the last 12 months · since October 2022
Investment rate at every auction
Every 17-week bill auction
| Date | Rate | Discount | Chg | Price / $100 | $10,000 cost | Earns | Cover | Size | Official results |
|---|---|---|---|---|---|---|---|---|---|
| 4.230% | 4.115% | −2.1 bp | 98.639764 | $9,863.98 | $136.02 | 2.89× | $75B | ||
| 4.251% | 4.135% | +11 bp | 98.633153 | $9,863.32 | $136.68 | 2.81× | $72B | ||
| 4.141% | 4.030% | +14 bp | 98.667861 | $9,866.79 | $133.21 | 2.72× | $72B | ||
| 4.001% | 3.895% | +4.2 bp | 98.712486 | $9,871.25 | $128.75 | 2.73× | $72B | ||
| 3.959% | 3.855% | +10.9 bp | 98.725708 | $9,872.57 | $127.43 | 2.78× | $72B | ||
| 3.850% | 3.750% | 0 bp | 98.760417 | $9,876.04 | $123.96 | 3.09× | $72B | ||
| 3.850% | 3.750% | −0.5 bp | 98.760417 | $9,876.04 | $123.96 | 3.35× | $72B | ||
| 3.855% | 3.755% | −3.1 bp | 98.758764 | $9,875.88 | $124.12 | 3.16× | $72B | ||
| 3.886% | 3.785% | −9.4 bp | 98.748847 | $9,874.88 | $125.12 | 3.19× | $72B | ||
| 3.980% | 3.875% | +3.1 bp | 98.719097 | $9,871.91 | $128.09 | 3.04× | $72B | ||
| 3.949% | 3.845% | +10.4 bp | 98.729014 | $9,872.90 | $127.10 | 2.76× | $72B | ||
| 3.845% | 3.745% | −4.6 bp | 98.762069 | $9,876.21 | $123.79 | 3.35× | $72B | ||
| 3.891% | 3.790% | −0.6 bp | 98.747194 | $9,874.72 | $125.28 | 3.41× | $72B | ||
| 3.897% | 3.795% | +2.6 bp | 98.745542 | $9,874.55 | $125.45 | 2.66× | $72B | ||
| 3.871% | 3.770% | +10.4 bp | 98.753806 | $9,875.38 | $124.62 | 2.55× | $69B | ||
| 3.767% | 3.670% | +0.6 bp | 98.786861 | $9,878.69 | $121.31 | 2.87× | $69B | ||
| 3.761% | 3.665% | +3.1 bp | 98.788514 | $9,878.85 | $121.15 | 2.88× | $69B | ||
| 3.730% | 3.635% | +0.5 bp | 98.798431 | $9,879.84 | $120.16 | 3.15× | $69B | ||
| 3.725% | 3.630% | +4.1 bp | 98.800083 | $9,880.01 | $119.99 | 3.01× | $69B | ||
| 3.684% | 3.590% | −2.6 bp | 98.813306 | $9,881.33 | $118.67 | 3.34× | $69B | ||
| 3.710% | 3.615% | +1.1 bp | 98.805042 | $9,880.50 | $119.50 | 3.20× | $69B | ||
| 3.699% | 3.605% | −1.6 bp | 98.808347 | $9,880.83 | $119.17 | 3.13× | $69B | ||
| 3.715% | 3.620% | +1.1 bp | 98.803389 | $9,880.34 | $119.66 | 2.78× | $69B | ||
| 3.704% | 3.610% | −1.6 bp | 98.806694 | $9,880.67 | $119.33 | 3.02× | $69B | ||
| 3.720% | 3.625% | +2.6 bp | 98.801736 | $9,880.17 | $119.83 | 2.93× | $69B | ||
| 3.694% | 3.600% | −1.6 bp | 98.810000 | $9,881.00 | $119.00 | 3.34× | $69B |
Show 181 earlier auctions, back to October 2022+
| Date | Rate | Discount | $10,000 cost | Cover | Size |
|---|---|---|---|---|---|
| Apr 1, 2026 | 3.710% | 3.615% | $9,880.50 | 2.95× | $69B |
| Mar 25, 2026 | 3.730% | 3.635% | $9,879.84 | 2.82× | $69B |
| Mar 18, 2026 | 3.704% | 3.610% | $9,880.67 | 3.05× | $69B |
| Mar 11, 2026 | 3.694% | 3.600% | $9,881.00 | 3.19× | $69B |
| Mar 4, 2026 | 3.684% | 3.590% | $9,881.33 | 3.25× | $69B |
| Feb 25, 2026 | 3.684% | 3.590% | $9,881.33 | 3.20× | $69B |
| Feb 18, 2026 | 3.689% | 3.595% | $9,881.17 | 3.15× | $69B |
| Feb 11, 2026 | 3.689% | 3.595% | $9,881.17 | 3.38× | $69B |
| Feb 4, 2026 | 3.689% | 3.595% | $9,881.17 | 2.97× | $69B |
| Jan 28, 2026 | 3.684% | 3.590% | $9,881.33 | 2.92× | $69B |
| Jan 21, 2026 | 3.673% | 3.580% | $9,881.66 | 2.99× | $69B |
| Jan 14, 2026 | 3.652% | 3.560% | $9,882.32 | 3.00× | $69B |
| Jan 7, 2026 | 3.601% | 3.510% | $9,883.98 | 3.02× | $69B |
| Dec 31, 2025 | 3.632% | 3.540% | $9,882.98 | 3.11× | $69B |
| Dec 24, 2025 | 3.647% | 3.555% | $9,882.49 | 2.95× | $69B |
| Dec 17, 2025 | 3.632% | 3.540% | $9,882.98 | 3.27× | $69B |
| Dec 10, 2025 | 3.704% | 3.610% | $9,880.67 | 3.04× | $69B |
| Dec 3, 2025 | 3.715% | 3.620% | $9,880.34 | 3.17× | $69B |
| Nov 26, 2025 | 3.839% | 3.740% | $9,876.37 | 2.84× | $69B |
| Nov 19, 2025 | 3.850% | 3.750% | $9,876.04 | 3.15× | $69B |
| Nov 12, 2025 | 3.850% | 3.750% | $9,876.04 | 3.18× | $69B |
| Nov 5, 2025 | 3.870% | 3.770% | $9,876.43 | 3.36× | $69B |
| Oct 29, 2025 | 3.803% | 3.705% | $9,877.53 | 2.94× | $69B |
| Oct 22, 2025 | 3.834% | 3.735% | $9,876.54 | 3.27× | $69B |
| Oct 15, 2025 | 3.912% | 3.810% | $9,874.06 | 2.87× | $69B |
| Oct 8, 2025 | 3.876% | 3.775% | $9,875.22 | 3.28× | $69B |
| Oct 1, 2025 | 3.886% | 3.785% | $9,874.88 | 3.32× | $67B |
| Sep 24, 2025 | 3.907% | 3.805% | $9,874.22 | 2.93× | $65B |
| Sep 17, 2025 | 3.917% | 3.815% | $9,873.89 | 3.06× | $65B |
| Sep 10, 2025 | 3.954% | 3.850% | $9,872.74 | 3.26× | $65B |
| Sep 3, 2025 | 4.073% | 3.965% | $9,868.93 | 3.34× | $65B |
| Aug 27, 2025 | 4.131% | 4.020% | $9,867.12 | 3.00× | $65B |
| Aug 20, 2025 | 4.162% | 4.050% | $9,866.13 | 3.14× | $65B |
| Aug 13, 2025 | 4.162% | 4.050% | $9,866.13 | 3.50× | $65B |
| Aug 6, 2025 | 4.219% | 4.105% | $9,864.31 | 3.31× | $65B |
| Jul 30, 2025 | 4.329% | 4.210% | $9,860.84 | 3.45× | $65B |
| Jul 23, 2025 | 4.344% | 4.225% | $9,860.34 | 3.55× | $65B |
| Jul 16, 2025 | 4.350% | 4.230% | $9,860.18 | 3.02× | $65B |
| Jul 9, 2025 | 4.350% | 4.230% | $9,859.00 | 3.03× | $65B |
| Jul 2, 2025 | 4.303% | 4.185% | $9,861.66 | 3.04× | $65B |
| Jun 25, 2025 | 4.313% | 4.195% | $9,861.33 | 3.13× | $63B |
| Jun 18, 2025 | 4.355% | 4.235% | $9,860.01 | 2.88× | $60B |
| Jun 11, 2025 | 4.339% | 4.220% | $9,860.51 | 2.96× | $60B |
| Jun 4, 2025 | 4.323% | 4.205% | $9,861.00 | 3.13× | $60B |
| May 28, 2025 | 4.339% | 4.220% | $9,860.51 | 3.36× | $60B |
| May 21, 2025 | 4.350% | 4.230% | $9,860.18 | 3.21× | $60B |
| May 14, 2025 | 4.360% | 4.240% | $9,859.84 | 3.28× | $60B |
| May 7, 2025 | 4.318% | 4.200% | $9,861.17 | 3.02× | $60B |
| Apr 30, 2025 | 4.308% | 4.190% | $9,861.50 | 3.08× | $60B |
| Apr 23, 2025 | 4.329% | 4.210% | $9,860.84 | 2.92× | $60B |
| Apr 16, 2025 | 4.344% | 4.225% | $9,860.34 | 2.75× | $60B |
| Apr 9, 2025 | 4.370% | 4.250% | $9,859.51 | 2.71× | $60B |
| Apr 2, 2025 | 4.318% | 4.200% | $9,861.17 | 2.98× | $60B |
| Mar 26, 2025 | 4.318% | 4.200% | $9,861.17 | 2.78× | $60B |
| Mar 19, 2025 | 4.313% | 4.195% | $9,861.33 | 2.99× | $60B |
| Mar 12, 2025 | 4.292% | 4.175% | $9,861.99 | 3.29× | $60B |
| Mar 5, 2025 | 4.297% | 4.180% | $9,861.83 | 3.42× | $60B |
| Feb 26, 2025 | 4.318% | 4.200% | $9,861.17 | 2.78× | $60B |
| Feb 19, 2025 | 4.334% | 4.215% | $9,860.67 | 3.33× | $60B |
| Feb 12, 2025 | 4.350% | 4.230% | $9,860.18 | 3.38× | $62B |
| Feb 5, 2025 | 4.323% | 4.205% | $9,861.00 | 2.99× | $64B |
| Jan 29, 2025 | 4.308% | 4.190% | $9,861.50 | 3.10× | $64B |
| Jan 22, 2025 | 4.323% | 4.205% | $9,861.00 | 3.28× | $64B |
| Jan 15, 2025 | 4.329% | 4.210% | $9,860.84 | 3.19× | $64B |
| Jan 8, 2025 | 4.308% | 4.190% | $9,861.50 | 3.24× | $64B |
| Jan 2, 2025 | 4.313% | 4.195% | $9,861.33 | 3.04× | $64B |
| Dec 26, 2024 | 4.350% | 4.230% | $9,860.18 | 2.91× | $64B |
| Dec 18, 2024 | 4.339% | 4.220% | $9,860.51 | 2.97× | $64B |
| Dec 11, 2024 | 4.360% | 4.240% | $9,859.84 | 2.83× | $64B |
| Dec 4, 2024 | 4.438% | 4.315% | $9,857.37 | 3.10× | $64B |
| Nov 27, 2024 | 4.517% | 4.390% | $9,854.89 | 2.80× | $64B |
| Nov 20, 2024 | 4.506% | 4.380% | $9,855.22 | 3.14× | $64B |
| Nov 13, 2024 | 4.496% | 4.370% | $9,855.55 | 3.15× | $64B |
| Nov 6, 2024 | 4.537% | 4.410% | $9,854.23 | 2.79× | $64B |
| Oct 30, 2024 | 4.558% | 4.430% | $9,853.56 | 2.99× | $64B |
| Oct 23, 2024 | 4.574% | 4.445% | $9,853.07 | 2.97× | $64B |
| Oct 16, 2024 | 4.548% | 4.420% | $9,853.89 | 3.05× | $64B |
| Oct 9, 2024 | 4.558% | 4.430% | $9,853.56 | 3.31× | $64B |
| Oct 2, 2024 | 4.537% | 4.410% | $9,854.23 | 3.37× | $64B |
| Sep 25, 2024 | 4.558% | 4.430% | $9,853.56 | 2.80× | $62B |
| Sep 18, 2024 | 4.799% | 4.660% | $9,845.96 | 3.05× | $60B |
| Sep 11, 2024 | 4.882% | 4.740% | $9,843.32 | 2.74× | $60B |
| Sep 4, 2024 | 4.956% | 4.810% | $9,841.00 | 3.21× | $60B |
| Aug 28, 2024 | 5.018% | 4.870% | $9,839.02 | 3.25× | $60B |
| Aug 21, 2024 | 5.071% | 4.920% | $9,837.37 | 3.28× | $60B |
| Aug 14, 2024 | 5.134% | 4.980% | $9,835.38 | 3.34× | $60B |
| Aug 7, 2024 | 5.144% | 4.990% | $9,835.05 | 2.89× | $60B |
| Jul 31, 2024 | 5.249% | 5.090% | $9,831.75 | 3.24× | $60B |
| Jul 24, 2024 | 5.275% | 5.115% | $9,830.92 | 3.00× | $60B |
| Jul 17, 2024 | 5.296% | 5.135% | $9,830.26 | 3.12× | $60B |
| Jul 10, 2024 | 5.359% | 5.195% | $9,828.28 | 3.16× | $60B |
| Jul 3, 2024 | 5.370% | 5.205% | $9,827.95 | 3.15× | $60B |
| Jun 26, 2024 | 5.385% | 5.220% | $9,827.45 | 2.75× | $60B |
| Jun 20, 2024 | 5.385% | 5.220% | $9,827.45 | 2.81× | $60B |
| Jun 12, 2024 | 5.385% | 5.220% | $9,827.45 | 2.94× | $60B |
| Jun 5, 2024 | 5.391% | 5.225% | $9,827.28 | 2.79× | $60B |
| May 29, 2024 | 5.406% | 5.240% | $9,826.79 | 2.80× | $60B |
| May 22, 2024 | 5.401% | 5.235% | $9,826.95 | 2.89× | $60B |
| May 15, 2024 | 5.401% | 5.235% | $9,826.95 | 2.98× | $60B |
| May 8, 2024 | 5.406% | 5.240% | $9,826.79 | 3.04× | $60B |
| May 1, 2024 | 5.412% | 5.245% | $9,826.62 | 3.02× | $60B |
| Apr 24, 2024 | 5.406% | 5.240% | $9,826.79 | 2.80× | $60B |
| Apr 17, 2024 | 5.406% | 5.240% | $9,826.79 | 2.81× | $60B |
| Apr 10, 2024 | 5.396% | 5.230% | $9,827.12 | 3.12× | $60B |
| Apr 3, 2024 | 5.364% | 5.200% | $9,828.11 | 2.91× | $60B |
| Mar 27, 2024 | 5.370% | 5.205% | $9,827.95 | 2.77× | $60B |
| Mar 20, 2024 | 5.380% | 5.215% | $9,827.62 | 2.73× | $60B |
| Mar 13, 2024 | 5.375% | 5.210% | $9,827.78 | 3.00× | $60B |
| Mar 6, 2024 | 5.370% | 5.205% | $9,827.95 | 2.84× | $60B |
| Feb 28, 2024 | 5.391% | 5.225% | $9,827.28 | 2.86× | $60B |
| Feb 21, 2024 | 5.395% | 5.215% | $9,827.62 | 2.97× | $60B |
| Feb 14, 2024 | 5.395% | 5.215% | $9,827.62 | 3.07× | $60B |
| Feb 7, 2024 | 5.358% | 5.180% | $9,828.77 | 2.97× | $60B |
| Jan 31, 2024 | 5.327% | 5.150% | $9,829.76 | 2.69× | $60B |
| Jan 24, 2024 | 5.363% | 5.185% | $9,828.61 | 2.76× | $60B |
| Jan 17, 2024 | 5.363% | 5.185% | $9,828.61 | 3.22× | $58B |
| Jan 10, 2024 | 5.358% | 5.180% | $9,828.77 | 3.19× | $56B |
| Jan 3, 2024 | 5.379% | 5.200% | $9,828.11 | 3.09× | $56B |
| Dec 27, 2023 | 5.390% | 5.210% | $9,827.78 | 3.15× | $56B |
| Dec 20, 2023 | 5.400% | 5.220% | $9,827.45 | 2.99× | $56B |
| Dec 13, 2023 | 5.432% | 5.250% | $9,826.46 | 2.84× | $56B |
| Dec 6, 2023 | 5.421% | 5.240% | $9,826.79 | 2.97× | $56B |
| Nov 29, 2023 | 5.421% | 5.240% | $9,826.79 | 2.92× | $56B |
| Nov 22, 2023 | 5.442% | 5.260% | $9,826.13 | 3.08× | $56B |
| Nov 15, 2023 | 5.437% | 5.255% | $9,826.29 | 3.17× | $56B |
| Nov 8, 2023 | 5.469% | 5.285% | $9,825.30 | 3.06× | $56B |
| Nov 1, 2023 | 5.527% | 5.340% | $9,823.48 | 2.89× | $56B |
| Oct 25, 2023 | 5.521% | 5.335% | $9,823.65 | 2.96× | $56B |
| Oct 18, 2023 | 5.542% | 5.355% | $9,822.99 | 3.27× | $56B |
| Oct 11, 2023 | 5.542% | 5.355% | $9,822.99 | 3.37× | $56B |
| Oct 4, 2023 | 5.537% | 5.350% | $9,823.15 | 2.96× | $54B |
| Sep 27, 2023 | 5.532% | 5.345% | $9,823.32 | 3.18× | $52B |
| Sep 20, 2023 | 5.527% | 5.340% | $9,823.48 | 2.83× | $50B |
| Sep 13, 2023 | 5.516% | 5.330% | $9,823.81 | 2.95× | $50B |
| Sep 6, 2023 | 5.521% | 5.335% | $9,823.65 | 2.98× | $50B |
| Aug 30, 2023 | 5.516% | 5.330% | $9,823.81 | 3.12× | $50B |
| Aug 23, 2023 | 5.500% | 5.315% | $9,824.31 | 3.01× | $50B |
| Aug 16, 2023 | 5.490% | 5.305% | $9,824.64 | 3.02× | $50B |
| Aug 9, 2023 | 5.495% | 5.310% | $9,824.48 | 3.19× | $48B |
| Aug 2, 2023 | 5.484% | 5.300% | $9,824.81 | 3.21× | $46B |
| Jul 26, 2023 | 5.484% | 5.300% | $9,824.81 | 2.99× | $46B |
| Jul 19, 2023 | 5.453% | 5.270% | $9,825.80 | 3.29× | $46B |
| Jul 12, 2023 | 5.442% | 5.260% | $9,826.13 | 3.13× | $46B |
| Jul 5, 2023 | 5.432% | 5.250% | $9,826.46 | 3.31× | $46B |
| Jun 28, 2023 | 5.405% | 5.225% | $9,828.74 | 3.44× | $46B |
| Jun 21, 2023 | 5.400% | 5.220% | $9,827.45 | 3.27× | $46B |
| Jun 14, 2023 | 5.327% | 5.150% | $9,829.76 | 3.18× | $46B |
| Jun 7, 2023 | 5.379% | 5.200% | $9,828.11 | 3.36× | $46B |
| May 31, 2023 | 5.511% | 5.325% | $9,823.98 | 2.97× | $44B |
| May 24, 2023 | 5.442% | 5.260% | $9,826.13 | 2.73× | $42B |
| May 17, 2023 | 5.274% | 5.100% | $9,831.42 | 2.57× | $39B |
| May 10, 2023 | 5.169% | 5.000% | $9,834.72 | 2.98× | $36B |
| May 3, 2023 | 5.148% | 4.980% | $9,835.38 | 2.95× | $36B |
| Apr 26, 2023 | 5.142% | 4.975% | $9,835.55 | 2.85× | $36B |
| Apr 19, 2023 | 5.232% | 5.060% | $9,832.74 | 2.91× | $36B |
| Apr 12, 2023 | 5.148% | 4.980% | $9,835.38 | 2.70× | $36B |
| Apr 5, 2023 | 4.906% | 4.750% | $9,842.99 | 2.81× | $36B |
| Mar 29, 2023 | 4.938% | 4.780% | $9,841.99 | 2.63× | $36B |
| Mar 22, 2023 | 4.964% | 4.805% | $9,841.17 | 2.61× | $36B |
| Mar 15, 2023 | 4.906% | 4.750% | $9,842.99 | 2.74× | $36B |
| Mar 8, 2023 | 5.216% | 5.045% | $9,833.23 | 2.62× | $36B |
| Mar 1, 2023 | 5.049% | 4.885% | $9,837.17 | 2.92× | $36B |
| Feb 22, 2023 | 4.977% | 4.830% | $9,840.34 | 2.93× | $36B |
| Feb 15, 2023 | 4.945% | 4.800% | $9,841.33 | 2.93× | $36B |
| Feb 8, 2023 | 4.840% | 4.700% | $9,844.64 | 2.59× | $36B |
| Feb 1, 2023 | 4.762% | 4.625% | $9,847.12 | 2.86× | $36B |
| Jan 25, 2023 | 4.757% | 4.620% | $9,847.28 | 2.90× | $36B |
| Jan 18, 2023 | 4.746% | 4.610% | $9,847.61 | 2.97× | $36B |
| Jan 11, 2023 | 4.820% | 4.680% | $9,845.30 | 2.79× | $36B |
| Jan 4, 2023 | 4.705% | 4.570% | $9,848.94 | 3.10× | $33B |
| Dec 28, 2022 | 4.684% | 4.550% | $9,849.60 | 2.88× | $33B |
| Dec 21, 2022 | 4.553% | 4.425% | $9,853.73 | 3.00× | $33B |
| Dec 14, 2022 | 4.569% | 4.440% | $9,853.23 | 2.96× | $33B |
| Dec 7, 2022 | 4.527% | 4.400% | $9,854.56 | 2.66× | $33B |
| Nov 30, 2022 | 4.558% | 4.430% | $9,853.56 | 3.10× | $33B |
| Nov 23, 2022 | 4.527% | 4.400% | $9,854.56 | 3.24× | $33B |
| Nov 16, 2022 | 4.443% | 4.320% | $9,857.20 | 3.15× | $33B |
| Nov 9, 2022 | 4.423% | 4.300% | $9,857.86 | 3.21× | $33B |
| Nov 2, 2022 | 4.402% | 4.280% | $9,858.52 | 3.14× | $33B |
| Oct 26, 2022 | 4.297% | 4.180% | $9,861.83 | 2.92× | $33B |
| Oct 19, 2022 | 4.256% | 4.140% | $9,863.15 | 2.93× | $33B |
Rate = investment rate (bond-equivalent yield); Discount = the same result on Treasury's 360-day discount basis. Chg = rate versus the previous auction of this bill. Price = per $100 of face value, as Treasury prints it; $10,000 cost and Earns scale it to $10,000 of face value. Cover = bid-to-cover ratio. Size = amount offered to the public. r = reopening of an existing bill. PDF = Treasury's official results.
Frequently Asked Questions
What is the current 4-month T-bill rate?
At the Sep 30, 2026 auction, the 17-week (4-month) Treasury bill sold at an investment rate of 4.230% (discount rate 4.115%). $10,000 of face value cost $9,863.98 and pays $10,000 on Feb 2, 2027, earning $136.02. The investment rate is the bond-equivalent yield, the number to set beside a savings account or CD rate; the discount rate is the same result on Treasury's 360-day discount basis and is always a little lower.
When is the next 17-week T-bill auction?
Treasury has not announced the next 17-week bill auction yet; it does so a few days ahead, and this bill usually auctions on a Wednesday. This page lists it as soon as it is announced. Competitive bidding closes at 11:30 am Eastern on auction day and Treasury posts the results within minutes.
How much does $10,000 of the 17-week bill cost?
At the Sep 30, 2026 auction, $10,000 of face value cost $9,863.98. It pays $10,000 on Feb 2, 2027, 119 days after issue, so the bill earns $136.02. Individuals can place a non-competitive bid through TreasuryDirect (from $100) or most brokerages (usually from $1,000), up to $10 million per auction, and receive the rate the auction sets. Interest on Treasury bills is subject to federal income tax and exempt from state and local income tax.
What was the 17-week (4-month) T-bill rate a year ago?
3.907%, at the Sep 24, 2025 auction. The latest auction, on Sep 30, 2026, paid 4.230%, 32 bp higher.
What is the highest 17-week (4-month) T-bill rate since 2022?
5.542%, at the Oct 11, 2023 auction. The lowest was 3.601% on Jan 7, 2026. The record on this page starts with the Oct 19, 2022 auction.
How often does Treasury auction the 17-week bill?
Treasury held 53 17-week bill auctions in the last twelve months, usually on a Wednesday. Each 17-week auction sells a new bill with its own CUSIP and maturity date.
Data: US Department of the Treasury (Fiscal Data and TreasuryDirect); Treasury's official results are linked on every auction. The $10,000 cost and earnings are TFTC's arithmetic from the price per $100. How to read the two rates, and how to buy at auction, is on the T-bill rates page. Full history as open JSON (CC BY 4.0). Not investment advice.