TIPS Bond Real Return Calculator
Calculate the real inflation-adjusted return on Treasury Inflation-Protected Securities and compare to nominal Treasury bonds.
What Are TIPS?
Treasury Inflation-Protected Securities (TIPS) are U.S. government bonds whose principal adjusts with the Consumer Price Index (CPI). As inflation rises, so does your principal — and therefore your coupon payments. At maturity, you receive the higher of the original or inflation-adjusted principal.
TIPS vs Nominal Bonds
Nominal bonds pay a fixed coupon on a fixed principal. Inflation erodes the real purchasing power of those payments over time. TIPS protect against that erosion.
The Break-Even Inflation Rate Break-even inflation = nominal yield − TIPS real yield. If actual inflation exceeds the break-even rate, TIPS outperform nominal bonds. If inflation stays below break-even, nominal bonds win.
TIPS Mechanics Year n adjusted principal = original principal × (1 + inflation)^n Annual coupon = adjusted principal × TIPS real yield Cumulative TIPS value = adjusted principal + sum of all coupons
Nominal Bond Mechanics Annual coupon = original principal × nominal yield (fixed, does not adjust) Total nominal value = original principal + sum of all coupons Real purchasing power of nominal = total nominal value ÷ (1 + inflation)^years
Key Takeaway TIPS shine when inflation is higher than expected. In low-inflation environments, nominal bonds often win on total return. For retirement planning, a mix of both reduces risk.