Updated November 6, 2026. Quick answer: TreasuryDirect has not announced the I bond rate for November 2027. It announces a new fixed rate and inflation rate every May 1 and November 1, so the November 1, 2027 announcement comes after the May 1, 2027 one, which has not been made either. As of November 6, 2026 the rate is 5.51% combined, including a fixed rate of 1.40%, for I bonds issued November 1, 2026 to April 30, 2027. This page prints no November 2027 figure and no estimate.
Two announcements stand between today and November 2027
| Item | Status as of November 6, 2026 |
|---|---|
| Next announcement | May 1, 2027 (not yet made) |
| The announcement this page is about | November 1, 2027 (not yet made) |
| Rate in force today | 5.51% combined, fixed 1.40%, semiannual inflation 2.04% (bonds issued November 1, 2026 to April 30, 2027) |
| Rate announced May 1, 2026 | 4.26% combined (computed), fixed 0.90%, semiannual inflation 1.67% |
TreasuryDirect’s I bond page shows “Series I Savings Bonds 5.51% This includes a fixed rate of 1.40% For I bonds issued November 1, 2026 to April 30, 2027.” The page that lists every announcement and its fixed-rate history is I bond rates, and the current announcement has its own page, the November 2026 I bond rate.
When the November 2027 rate arrives
TreasuryDirect says “We announce the fixed rate every May 1 and November 1.” It adds “That fixed rate then applies, for the life of the bond, to all I bonds that we issue during the next 6 months.” A November 1 announcement therefore governs bonds issued from November 2027 on. The inflation part is also set on those two dates: “We base the inflation rate on changes in the non-seasonally adjusted Consumer Price Index for all Urban Consumers (CPI-U)”. The combined rate “changes every 6 months. It can go up or down.” Until the announcement the November 2027 figure is unknown, so this page prints none.
How the November combined rate will be built
TreasuryDirect gives the formula as “Composite rate formula: [Fixed rate + (2 x semiannual inflation rate) + (fixed rate x semiannual inflation rate)]”. Its own worked example is the current rate: fixed 1.40%, semiannual inflation 2.04%, “Adding the parts gives 0.0550856”, “Rounding gives 0.0551”. Recomputed here: 0.0140 + (2 x 0.0204) + (0.0140 x 0.0204) = 0.0140 + 0.0408 + 0.0002856 = 0.0550856, which rounds to 0.0551, or 5.51% (computed). The regulation, 31 CFR 359.14, writes the same calculation as “Composite rate = {(Fixed rate ÷ 2) + Semiannual inflation rate + [Semiannual inflation rate × (Fixed rate ÷ 2)]} × 2.” The two inputs for November 2027 are the new fixed rate and the new semiannual inflation rate, both announced November 1, 2027; neither is known today.
The November announcements since 2019
Each November 1 announcement from 2019 to 2026, from TreasuryDirect’s tables of fixed rates and inflation rates. The combined rate in the last column is computed from the other two with the formula above (inputs printed in the row).
| Announced | Fixed rate | Semiannual inflation rate | Combined rate (computed) |
|---|---|---|---|
| November 1, 2026 | 1.40% | 2.04% | 5.51% |
| November 1, 2025 | 0.90% | 1.56% | 4.03% |
| November 1, 2024 | 1.20% | 0.95% | 3.11% |
| November 1, 2023 | 1.30% | 1.97% | 5.27% |
| November 1, 2022 | 0.40% | 3.24% | 6.89% |
| November 1, 2021 | 0.00% | 3.56% | 7.12% |
| November 1, 2020 | 0.00% | 0.84% | 1.68% |
| November 1, 2019 | 0.20% | 1.01% | 2.22% |
November 2026 against November 2025: the fixed rate is up 0.50 points (1.40 minus 0.90), the inflation rate is up 0.48 points (2.04 minus 1.56) and the combined rate is up 1.48 points (5.51 minus 4.03), all computed. The rows are a record, not a forecast of 2027.
Which bonds the November 1 announcement touches
A bond keeps the fixed rate it was issued with. The inflation part is reset on a schedule that follows each bond’s own issue month. TreasuryDirect says “the date when the rate changes for your bond is every 6 months from the issue date of your bond”. Its table:
| If we issued your bond in | Your interest rate changes every |
|---|---|
| January | July 1 and January 1 |
| February | August 1 and February 1 |
| March | September 1 and March 1 |
| April | October 1 and April 1 |
| May | November 1 and May 1 |
| June | December 1 and June 1 |
| July | January 1 and July 1 |
| August | February 1 and August 1 |
| September | March 1 and September 1 |
| October | April 1 and October 1 |
| November | May 1 and November 1 |
| December | June 1 and December 1 |
By that table, bonds issued in May or November are the ones whose next rate applies from the May 1 and November 1 dates. Bonds issued in other months move to their next six-month rate on their own dates; the fixed-rate announcement is the one that applies to bonds issued from November 1, 2027 on.
Common mistakes
- Treating the 5.51% as the November 2027 rate. It applies to bonds issued through April 30, 2027, and a May 1 announcement sits between it and November.
- Assuming a new rate applies to your bond on the announcement date. It applies from your own issue-month schedule.
- Confusing the fixed rate, which stays for life, with the combined rate, which resets every six months.
- Counting on a particular November rate before TreasuryDirect posts it.
Related: I bond rates and fixed-rate history, the November 2026 I bond rate, the May 2027 I bond rate, when to cash out an I bond, and I bond purchase limits and gifting.
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Answer againSources
- U.S. Department of the Treasury, TreasuryDirect, I bonds: www.treasurydirect.gov
- U.S. Department of the Treasury, TreasuryDirect, I bonds interest rates (fixed, inflation and combined rates, by date set): www.treasurydirect.gov
- 31 CFR Part 359, Series I savings bonds (eCFR): www.ecfr.gov
Read from the primary documents linked above on November 6, 2026. General information, not tax advice. Your own facts decide the outcome, and a preparer or the IRS itself is the right place to confirm anything consequential.