CPI vs. PCE: Understanding Inflation Measures

In Depth

The Consumer Price Index (CPI) and the Personal Consumption Expenditures (PCE) price index are the two most important inflation measures in the United States, each with distinct methodologies and uses. CPI, published monthly by the Bureau of Labor Statistics, measures the average change in prices paid by urban consumers for a fixed basket of goods and services. PCE, published by the Bureau of Economic Analysis, captures price changes across a broader set of expenditures and uses a chain-weighted methodology that accounts for consumer substitution behavior. The Federal Reserve officially targets 2% inflation as measured by core PCE (excluding food and energy), making it the more policy-relevant metric. However, CPI tends to receive more media attention because it is released earlier and is used to calculate Social Security cost-of-living adjustments, tax bracket inflation adjustments, and TIPS returns. CPI typically runs 0.3 to 0.5 percentage points higher than PCE due to its fixed-weight methodology and different scope. Both measures report "headline" (all items) and "core" (excluding food and energy) variants. For business leaders, understanding the distinction matters for contract escalation clauses, wage negotiation benchmarks, and interpreting Federal Reserve policy signals.