Treasury bonds are as close to risk-free as any investment gets, but they are not risk-free in the everyday sense of the phrase. When economists and portfolio models call them risk-free, they mean one specific thing: the U.S. government will make every scheduled interest and principal payment. That guarantee says nothing about inflation quietly eroding your purchasing power, nothing about the price of your bond falling if you have to sell early, and nothing about the yields you’ll find when your bond matures and you need to reinvest. So the honest answer to whether Treasury bonds are risk free is: free of default risk, yes; free of all investment risk, no.
What “Risk-Free” Actually Covers
In finance, “risk-free” is shorthand for “no default risk.” The borrower will pay you every dollar promised, on time. The U.S. government earns that label because Congress can tax the world’s largest economy and the Treasury can issue new debt to retire old debt. Article I, Section 8 of the Constitution grants Congress the power “to borrow Money on the credit of the United States,” giving federal borrowing a constitutional foundation.1Congress.gov. ArtI.S8.C2.1 Borrowing Power of Congress Section 4 of the 14th Amendment adds that “the validity of the public debt of the United States, authorized by law…shall not be questioned,” a clause courts have read to cover all government obligations, not just Civil War-era debt.2Cornell Law School. Public Debt Clause, U.S. Constitution Annotated
That’s the whole promise. You’ll receive the exact dollar amount the bond contract specifies, on the scheduled dates. What those dollars will buy, and what your bond is worth if you sell before maturity, are separate questions with separate answers.
Inflation Risk: The Dollars Are Guaranteed, Not Their Value
A standard Treasury bond pays the exact number of dollars promised. Inflation controls what those dollars can actually buy. If your bond pays a 4 percent coupon and the Consumer Price Index rises 2.4 percent over the same year, your real return is about 1.6 percent. If inflation runs above your coupon, you lose purchasing power even as the government dutifully pays interest into your account.
This is the risk that catches conservative investors off guard. During stable, low-inflation periods, fixed-rate Treasuries work well. During the 2021 to 2023 spike, investors holding older bonds with 1 to 2 percent coupons watched their real returns turn deeply negative. Every payment arrived on schedule. Those investors were still poorer in practical terms than when they started.
Nominal yield is the number printed on the bond. Real yield subtracts inflation. The distinction matters for anyone using Treasuries to fund retirement or another long-term goal, because a positive nominal return can mask a negative real return for years at a stretch.
Interest Rate Risk: Price Drops Before Maturity
The government guarantees your principal at maturity, not at any moment before. If you need to sell a Treasury on the secondary market early, the price depends on where interest rates have moved since you bought. Bond prices and rates move in opposite directions: when rates rise, existing bonds with lower coupons become less attractive, and their market price falls to compensate.
The math can sting. A typical 10-year Treasury note loses roughly 7 to 8 percent of its market value for every one-percentage-point rise in rates. A two-point spike can shave 15 percent or more off the price, depending on time to maturity. Investors who bought long-term bonds in 2020 and 2021 at historically low yields lived through this when the Federal Reserve raised rates aggressively in 2022 and 2023.3Federal Reserve Bank of St. Louis. Federal Funds Effective Rate (FEDFUNDS)
Holding to maturity eliminates this problem. The government pays full face value on the scheduled date regardless of what the bond was trading for the day before. The risk lands on investors who might need their money early. Matching your bond’s maturity to the date you’ll actually need the cash is the simplest way to sidestep interest-rate risk.
How Maturity Length Changes the Picture
Not all Treasury securities react to rate changes the same way. The longer the maturity, the more sensitive the price, because a rate difference gets multiplied over more years of future coupon payments and the market prices in that whole stream at once.
- Treasury bills, which mature in 4 to 52 weeks, are sold at a discount to face value rather than paying a coupon, and their short horizon keeps price swings minimal.4TreasuryDirect. Understanding Pricing and Interest Rates
- Treasury notes, running 2 to 10 years, pay a fixed coupon every six months and carry moderate price sensitivity.5TreasuryDirect. Treasury Notes
- Treasury bonds at 20 or 30 years carry the most price volatility, because a small rate move repricing decades of future payments creates an outsized swing.6TreasuryDirect. Treasury Bonds
As of mid-March 2026, the 10-year Treasury note was yielding around 4.20 percent. At that yield, the note’s price would drop roughly 7 to 8 percent if rates climbed another full point, while a 4-week bill at the same moment would barely move. Choosing between these products is really choosing how much price risk you’ll accept in exchange for locking in a yield over a longer period.
Reinvestment Risk: What Happens When Your Bond Matures
Reinvestment risk is the mirror image of interest-rate risk, and it gets less attention. When rates fall, your coupon payments and maturing principal have to be reinvested at the new, lower yields. An investor who built a portfolio of short-term Treasury bills at 5 percent may find, a year later, that the best available rate is 3 percent. The income stream shrinks even though the investor did nothing wrong.
Longer-term bonds offer some natural protection. If you lock in a 30-year bond at 4.5 percent, that coupon keeps paying regardless of where short-term rates drift. You’re trading reinvestment risk for the higher price volatility that comes with long maturities. One practical compromise is a bond ladder: buying bonds with staggered maturities so a portion of the portfolio matures each year. You’re never reinvesting everything at once into whatever rate environment happens to exist that day.
Credit Downgrades and Debt-Ceiling Scares
The “risk-free” reputation has taken visible hits over the past fifteen years. S&P downgraded U.S. sovereign debt from AAA in 2011, Fitch followed in 2023, and in May 2025 Moody’s became the last of the three major agencies to strip the top rating, dropping the U.S. to Aa1. Moody’s cited “the increase over more than a decade in government debt and interest payment ratios to levels that are significantly higher than similarly rated sovereigns.”7Moody’s Ratings. Moody’s Ratings Downgrades United States Ratings to Aa1 From Aaa No major credit agency now grades U.S. debt at the top tier.
Debt-ceiling standoffs create a more immediate concern. When Congress delays raising the borrowing limit, the Treasury relies on extraordinary accounting measures and existing cash to keep making payments. The Government Accountability Office has warned that these resources are finite, that the date when they run out is impossible to predict precisely, and that “last-minute negotiations on the debt limit can increase the risk of a default.”8U.S. Government Accountability Office. Debt Limit: Statutory Changes Could Avert the Risk of a Government Default and Its Potentially Severe Consequences A technical default driven by political gridlock rather than fiscal insolvency remains unlikely, but the market briefly prices in that uncertainty every time the ceiling becomes a bargaining chip.
Ways to Reduce the Risks That Remain
The Treasury offers two products designed specifically to guard against inflation. Treasury Inflation-Protected Securities (TIPS) adjust their principal up or down based on the Consumer Price Index. When inflation rises, principal grows, and because your coupon is calculated as a percentage of principal, interest payments grow with it. TIPS come in 5-, 10-, and 30-year terms with a $100 minimum purchase.9TreasuryDirect. TIPS – TreasuryDirect They also carry a deflation floor: at maturity you receive the inflation-adjusted principal or the original face value, whichever is greater. The catch is taxes. The IRS treats the annual inflation adjustment to your principal as taxable income in the year it occurs, even though you don’t receive that money until the bond matures. That “phantom income” can create a tax bill without corresponding cash.
Series I Savings Bonds take a different approach. Their rate combines a fixed rate set at purchase with a variable inflation component that resets every six months. For bonds issued from November 2025 through April 2026, the composite rate is 4.03 percent, built from a 0.90 percent fixed rate and a semiannual inflation adjustment of 1.56 percent.10TreasuryDirect. I Bonds Interest Rates Unlike TIPS, I Bonds defer all taxation until you cash them in. The trade-offs are a $10,000 annual purchase limit per person and a one-year minimum holding period.11TreasuryDirect. How Much Can I Spend/Own?
For interest-rate risk, the fix is behavioral rather than product-based: hold to maturity, and match maturities to when you’ll actually need the cash. For reinvestment risk, a ladder spreads maturities across years so you’re never fully exposed to a single day’s rates. Combined, these choices don’t turn a Treasury into a truly risk-free asset, but they narrow the gap between the textbook label and what actually happens to your money.