No. An I bond is not a bank deposit, so FDIC deposit insurance does not apply to it. Its protection works differently: an I bond is a loan to the United States government, bought directly from the Treasury, and TreasuryDirect describes savings bonds as "Backed by the full faith and credit of the U.S. government." That is a different promise from deposit insurance. It comes from the borrower itself, not from an insurer standing behind a bank.
Can it lose value? Not in dollars: its rate cannot go below zero, its value cannot fall from one month to the next, and the early-cashing penalty never takes it below what you paid. The real risks are quieter, and this page takes each in turn. It prints no current rate; the I bond interest rate page explains how the rate is built and where Treasury posts it.
What backs an I bond
TreasuryDirect's own summary takes two sentences: "When you buy a U.S. savings bond, you lend money to the U.S. government. In turn, the government agrees to pay that much money back later – plus additional money (interest)." Under the heading "Safe", the same page lists savings bonds as "Backed by the full faith and credit of the U.S. government". Two things follow from who the borrower is.
There is no bank in the middle. Treasury calls TreasuryDirect "the one and only place to electronically buy and redeem U.S. Savings Bonds", and since 1 January 2025 I bonds have been sold only electronically, in a TreasuryDirect account. The bond is the government's debt to you, not a bank's.
There is no market price. Treasury bills can be sold before they mature, at the day's market price. Savings bonds cannot: TreasuryDirect calls them non-marketable, because "each is registered to one person's social security number. You cannot sell them or transfer them to someone else." Their value is set by the regulation's rules, not by a market.
Are I bonds FDIC insured?
No, and the FDIC's own pages explain the principle. Its Understanding Deposit Insurance page (last updated 1 April 2024) says FDIC insurance "covers deposits in all types of accounts at FDIC-insured banks, but it does not cover non-deposit investment products, even those offered by FDIC-insured banks." An I bond is not a deposit at any bank.
On savings bonds by name, its pages differ:
- Its current lists of uninsured products do not name them. Financial Products That Are Not Insured by the FDIC (last updated 12 May 2026) names "U.S. Treasury Bills, Bonds or Notes", with a footnote: "These investments are backed by the full faith and credit of the U.S. government." The Not Covered list on Understanding Deposit Insurance names "U.S. Treasury bills, bonds, or notes". Neither mentions savings bonds.
- An FDIC consumer article from August 2022, still on fdic.gov (last updated 7 September 2022), does. It says the FDIC "does NOT insure non-deposit investment products, such as stocks, bonds, government and municipal securities, mutual funds, annuities (fixed and variable), life insurance policies (whole and variable), savings bonds, crypto assets, etc."
So the FDIC has said in terms, in that 2022 article, that savings bonds are not insured; its current lists say the same of Treasury bills, bonds and notes without naming savings bonds. For savings bonds, the full-faith-and-credit wording quoted above is TreasuryDirect's own, not the FDIC's. The not-insured page also says non-deposit investment products are not insured "even if they were purchased from an FDIC-insured bank", which covers an old paper bond bought over a bank counter.
| Bank CD or money market deposit account | I bond | |
|---|---|---|
| What it is | A deposit: the bank owes you the balance | A loan to the US government, bought from the Treasury |
| What stands behind it | FDIC deposit insurance, if the bank is FDIC-insured | The full faith and credit of the US government, in TreasuryDirect's words |
| How much is covered or allowed | Insured to $250,000 per depositor, per FDIC-insured bank, for each account ownership category | No FDIC cover; new purchases capped at $10,000 a year, with no limit on the total owned |
| Can an early exit cost you principal? | At some banks, yes: a CD's early-withdrawal penalty can be taken from principal once accrued interest runs out | No: the penalty stops at the issue price |
Deposit insurance in full, ownership categories and bank failures included, is on are CDs FDIC insured; are money market accounts FDIC insured separates the insured account from the uninsured fund.
Can I bonds lose value?
Not in dollars. Three written rules see to it.
The rate has a floor of zero. An I bond's rate combines a fixed rate with an inflation rate that resets every six months, and in deflation the inflation part turns negative. TreasuryDirect: "if the inflation rate is so negative that it would pull the combined rate below zero, we don't let that happen. We stop at zero." A note to the regulation, 31 CFR 359.10, says the same: in all cases the composite rate is zero or more.
The value cannot slip from month to month. When deflation completely offsets the fixed rate, 31 CFR 359.12 says "the redemption value of a Series I bond for any particular month will not be less than the value for the preceding month."
The early-cashing penalty stops at what you paid. Cash a bond before five years and Treasury cuts its earning period by three months. But under 31 CFR 359.7, "we will not reduce the redemption value of a bond subject to the three-month interest penalty below the issue price (par)."
Six months on $10,000, four ways (illustrative rates)
The rate comes from TreasuryDirect's formula (the fixed rate, plus twice the six-month inflation rate, plus the two multiplied together) on illustrative inputs, rounded to four decimal places as in its own worked example. The value follows the regulation's method (31 CFR 359.39): six months add half the annual rate, and a negative result counts as zero. Treasury's $25-unit rounding is ignored, and these are values, not cash: a bond normally cannot be cashed in its first 12 months.
| Illustrative fixed rate | Illustrative six-month inflation | Formula result | Rate the bond earns | Value after six months |
|---|---|---|---|---|
| 0.00% | 0.60% | 0.0120 | 1.20% | $10,060.00 |
| 1.00% | 1.20% | 0.03412 | 3.41% | $10,170.50 |
| 1.00% | −0.30% | 0.00397 | 0.40% | $10,020.00 |
| 0.00% | −0.50% | −0.0100 | 0.00% (the floor) | $10,000.00 |
The worst row is the last: six months of earning nothing, not a loss. What the rules do not promise is growth to any particular figure. Treasury's FAQ says Series I bonds "aren’t guaranteed to grow to a particular value", and the fixed rate is no floor either: the regulation says it "is not a guaranteed minimum rate", as the third row shows. The I bond calculator projects a bond's value with the zero floor and the penalty built in.
The risks that are real
None of these is a risk of default. Each is a way an I bond can do less than the word "safe" suggests.
A zero fixed rate: inflation in, inflation out
The fixed rate is known when you buy and kept for life ("The fixed rate never changes"), and it is the only part of the return above inflation. As read on 14 October 2026, TreasuryDirect's table of fixed rates since September 1998 lists 57 settings; 16 were 0.00%, most recently on 1 May 2022 (historical figures, not illustrative ones). A bond issued under a zero fixed rate earns the inflation component and nothing more.
One year on illustrative numbers, by the same method: prices rise 1.20% in each six-month period, the bond's six-month inflation rate is that same 1.20% both times, and the values are before the three-month penalty that applies to cashing within five years:
| One year on $10,000 (illustrative) | 0.00% fixed rate | 1.00% fixed rate |
|---|---|---|
| Value after a year | $10,241.44 | $10,343.91 |
| What the same goods cost a year later | $10,241.44 | $10,241.44 |
| Gain in purchasing power | none | about 1.00% |
| Federal tax on the year's interest at an illustrative 24% | $57.95 | $82.54 |
| After that tax, against prices | $57.95 behind | $19.93 ahead |
The zero-fixed-rate bond keeps pace with the index and no further; federal income tax on the interest then puts it behind. The interest is federally taxable, though exempt from state and local income tax, and IRS Publication 550 lets cash-method taxpayers postpone reporting it until the year they cash the bond or it matures, whichever is earlier. Deferral moves the tax; it does not remove it.
Two simplifications sit behind the table. An inflation reading "may affect interest accruals from 3 to 13 months from the date that the CPI-U is measured", in the regulation's words. And the index averages urban consumers' prices, all items "including food and energy", not your own household's bills.
Twelve months with no way out
"You can cash in (redeem) your I bond after 12 months", counted from the issue date (when I bonds mature lists the dates). Before then the bond cannot be cashed at all, penalty or not. Treasury's FAQ says the holding period "may be waived" in an area affected by a natural disaster, and that it "will allow early redemption in some cases" of financial hardship, without saying which. A year with no access is why where to keep an emergency fund calls I bonds "a good product and a bad emergency fund".
Before five years, the last three months of interest
"If you cash in the bond in less than 5 years, you lose the last 3 months of interest. For example, if you cash in the bond after 18 months, you get the first 15 months of interest." The forfeit is interest only, the floor at the issue price still holds, and the values TreasuryDirect shows for bonds under five years old already leave those three months out. What cashing before five years costs is priced month by month on the cashing page, which also covers lost-bond claims.
$10,000 a year caps how much the backing can cover
One Social Security number or one Employer Identification Number may buy up to $10,000 in electronic I bonds in a calendar year, and gift bonds count against the recipient's limit "in the year in which they get the bond". There is no cap on the total anyone can own, but the yearly cap sets the pace: moving an illustrative $50,000 into I bonds through one person's individual account takes five calendar years. How to buy I bonds covers how the limit is counted, gifts and entity accounts included, and EE bonds vs I bonds the other series, which has its own separate $10,000 limit.
Account access: the risk that changed in 2026
An electronic I bond lives in a TreasuryDirect account, so signing in is part of using it. After 28 October 2026, in Treasury's words, ID.me "will be the only method to log in to your TreasuryDirect account"; Login.gov cannot be used. Without an ID.me Wallet an owner can still manage the account "by submitting paper forms", but cannot sign in online, make new purchases or view tax forms online.
Treasury is clear that this is a question of access, not loss: its ID.me FAQ says "Your funds and investments will remain safe", and online access can be restored at any time by completing the ID.me setup. But paper is slow: as posted on TreasuryDirect's home page on 14 October 2026, mailed requests "to unlock your TreasuryDirect account or update your banking details may take two weeks or longer to complete." TreasuryDirect also reminds users that ID.me "will not charge you or ask for a credit card".
Paper bonds can be lost, and the search tool is gone
TreasuryDirect says you may own paper I bonds "issued before 2012 that you bought at a bank or through payroll savings", and paper I bonds were also sold with tax refunds from 2010 until that option ended on 1 January 2025. A paper bond's risk is the paper itself.
Treasury Hunt, the search tool older articles mention, is gone: "As of September 30, 2025, the Treasury Hunt® tool is no longer available." A lost, stolen or destroyed bond is now claimed on FS Form 1048, and Treasury will replace it with an electronic bond or cash it, as TreasuryDirect's lost-bond page sets out. The form asks for each bond's issue date (exact, or a range), face amount, serial number and the names, addresses and Social Security numbers on it. Expect a wait: as posted on TreasuryDirect's home page on 14 October 2026, requests to locate lost, stolen or missing bonds "require eleven months or longer for processing."
What safety means for an I bond
An I bond's protection does not run through a bank; it rests on the US government's full faith and credit. Within it, the dollar value is protected three ways: a rate that cannot go below zero, a value that cannot fall month to month, and a penalty that stops at the price paid. What is not protected is what the money buys, how soon you can reach it and how much can go in. Five checks follow:
- The fixed rate. It is the bond's whole return above inflation, known when you buy and fixed for life; Treasury announces a new one each 1 May and 1 November.
- The first 12 months. Money that may be needed within a year cannot come out, disaster and hardship cases aside.
- The five-year date. Until then, cashing costs the last three months of interest, never principal.
- The login. After 28 October 2026 online access runs only through ID.me; without it, the paper route applies.
- The paper. For any paper bond, a record of the issue date, face amount and serial number is what FS Form 1048 asks for.
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