Breakeven inflation is the bond market’s real-time estimate of future price increases, pulled from the yield gap between two types of U.S. Treasury debt. Subtract the real yield on a Treasury Inflation-Protected Security (TIPS) from the yield on a nominal Treasury bond of the same maturity, and the difference is the breakeven inflation rate. When the 10-year breakeven sits at 2.5%, investors are collectively pricing in average consumer price inflation of about 2.5% per year over the next decade. The number updates daily as capital moves between the two bond types.
The Two Bonds It Compares
The calculation rests on two Treasury instruments that share a maturity date but handle inflation very differently.1U.S. Department of the Treasury. Breakeven Inflation: Calculation, Components, and Market Signals
Standard Treasury bonds pay a fixed interest rate until maturity. An investor who buys a 10-year note yielding 4% knows exactly how many dollars each coupon will deliver. If prices rise faster than expected over those 10 years, each dollar of interest buys less. The yield on a nominal bond therefore reflects both an expected real return and whatever extra compensation investors demand for bearing inflation uncertainty.
TIPS take a different approach. The Treasury sells them in 5-year, 10-year, and 30-year terms.2TreasuryDirect. Treasury Inflation-Protected Securities (TIPS) The face value of a TIPS bond adjusts based on the non-seasonally adjusted Consumer Price Index for All Urban Consumers (CPI-U).1U.S. Department of the Treasury. Breakeven Inflation: Calculation, Components, and Market Signals When consumer prices climb 3% in a year, the principal rises by 3%, and coupon payments recalculate on the new, higher base. The yield TIPS quote is a real yield: the return after inflation.
How to Calculate the Breakeven Rate
The math is a simple subtraction. Take the yield on a nominal Treasury bond and subtract the real yield on a TIPS bond of the same maturity. The difference is the breakeven inflation rate.3Federal Reserve Bank of St. Louis. Breakeven Inflation
Say a 10-year nominal Treasury yields 4.0% and a 10-year TIPS yields 1.5%. The breakeven rate is 2.5%. That is the exact inflation rate at which both bonds would produce the same total return. An investor who expects prices to rise faster than 2.5% annually would prefer TIPS, since the inflation adjustments would outpace the fixed coupon. An investor who expects inflation below 2.5% would prefer the nominal bond and keep the higher fixed rate.4Federal Reserve Board. TIPS Yield Curve and Inflation Compensation
You do not have to do the arithmetic yourself. The Federal Reserve Bank of St. Louis publishes both the 5-year and 10-year breakeven rates daily through FRED, as series T5YIE and T10YIE.5Federal Reserve Bank of St. Louis (FRED). 10-Year Breakeven Inflation Rate The underlying Treasury yield data comes from the U.S. Treasury Department, and the series are free to pull.
What the Rate Is Telling You
A breakeven rate is a market consensus forecast for average annual CPI inflation over the chosen horizon. A 5-year breakeven of 2.3% means the investors pricing these bonds expect consumer prices to rise about 2.3% per year for the next five years.6Federal Reserve Bank of St. Louis (FRED). 5-Year Breakeven Inflation Rate It is capital at work, not a survey of economists.
One important wrinkle: the Federal Reserve’s 2% inflation target is set in terms of the personal consumption expenditures (PCE) price index, not CPI.7Federal Reserve Board. Why Does the Federal Reserve Aim for Inflation of 2 Percent Over the Longer Run? CPI tends to run slightly higher than PCE, so a 10-year breakeven near 2.3% can still be consistent with the Fed hitting its target. When breakevens climb well above that range, markets are signaling doubt about the Fed’s ability to contain prices.8Federal Reserve Bank of Cleveland. Inflation: Noise, Risk, and Expectations
Comparing the 5-year and 10-year rates tells you whether the market sees inflation pressure as temporary or persistent. If the 5-year rate spikes while the 10-year barely moves, investors are pricing a near-term shock that fades. If both climb together, the market is pricing a more structural shift.
The 5-Year, 5-Year Forward Rate
A useful extension of breakeven data is the 5-year, 5-year forward inflation expectation rate. It strips out the near-term noise and isolates expected average inflation for the five-year window that begins five years from today.9Federal Reserve Bank of St. Louis (FRED). 5-Year, 5-Year Forward Inflation Expectation Rate
The calculation uses both the 5-year and 10-year breakevens, extracting the implied rate for years six through ten by removing the five-year expectation already embedded in the ten-year figure. FRED publishes it daily as series T5YIFR. Central bankers watch this number as a gauge of whether long-run inflation expectations remain anchored. A temporary oil shock might push the 5-year breakeven up, but if the forward rate holds near 2%, the market still trusts the Fed to bring inflation back under control. If the forward rate drifts up too, that confidence is slipping.
Why the Number Is Not a Pure Forecast
This is where casual readings go wrong. The breakeven rate is not a clean measure of expected inflation. It bundles together expected price changes, a liquidity adjustment, and an inflation risk premium.4Federal Reserve Board. TIPS Yield Curve and Inflation Compensation
Inflation Risk Premium
Buyers of nominal bonds face real uncertainty about future price levels. They demand a slightly higher yield as compensation for that risk, which gets baked into the nominal yield and widens the breakeven spread beyond what investors actually expect inflation to be. The Cleveland Fed has noted that this systematically pushes breakeven rates above true inflation expectations, especially when economic uncertainty is elevated.8Federal Reserve Bank of Cleveland. Inflation: Noise, Risk, and Expectations
Liquidity Premium
Nominal Treasuries trade in far larger volumes than TIPS. A standard 10-year note can be sold quickly with minimal price impact; TIPS can take more effort to move at a fair price. Because TIPS are less liquid, investors demand a slightly higher real yield to hold them, which pushes TIPS yields up and compresses the breakeven spread. This works in the opposite direction from the risk premium. In practice the risk premium usually dominates, so the net bias tends to make breakevens overstate expected inflation by a modest amount.
Negative Real Yields
TIPS yields occasionally turn negative. A negative real yield means investors are paying a price that locks in a guaranteed loss of purchasing power, which they accept during flights to safety such as financial crises or aggressive central bank bond-buying.10U.S. Department of the Treasury. The Treasury Real Yield Curve and Breakeven Inflation When TIPS yields fall deeply negative for safety reasons, the breakeven spread can widen even if inflation expectations have not changed much. Reading that widening as a sudden inflation scare would misinterpret what is really a scramble for safe assets.
Survey-based measures of inflation expectations, like the University of Michigan consumer survey, avoid the premium distortions but introduce their own: small samples, infrequent updates, and respondents who are guessing rather than committing capital. Breakevens and surveys often move together but can diverge sharply during financial stress. Looking at both is usually the safer habit before drawing a conclusion from either.