PCE inflation: the Fed’s preferred gauge vs the CPI

The PCE price index measures the prices of goods and services bought by and for US households. It is published monthly by the Bureau of Economic Analysis (BEA) as part of the Personal Income and Outlays report, about two weeks after the CPI. On its own release day it draws less attention than the Consumer Price Index. Yet it is the inflation measure the Federal Reserve’s 2% goal is written in, which makes it the gauge that matters most for interest rates.

The two indexes usually tell a similar story and differ in the details. Over 2000–2019, CPI inflation ran about a third of a percentage point above PCE inflation on average. In 2022 the gap was over a point. In September 2026 it ran the other way for the core measures: core PCE was up 3.1% over the year while core CPI was up 2.6%.

This page explains what PCE measures, why the Fed prefers it, where the four sources of difference from the CPI come from, and how to read the two side by side.

What the PCE price index measures

Personal consumption expenditures are the consumer-spending component of GDP. BEA describes the price index as reflecting changes in the prices of goods and services purchased by consumers in the United States, including purchases made by others on their behalf. It is published monthly in the Personal Income and Outlays report, and quarterly and annual figures appear in the GDP release. The September 2026 figures came out on October 29, 2026; BEA’s next release was scheduled for November 25, 2026.

Like the CPI, PCE has a core version that excludes food and energy (see Core inflation: why food and energy are left out). Fed officials watch core PCE closely because it is a better guide to where headline inflation is heading, but the formal goal is defined on headline PCE.

Why the Fed targets PCE

The FOMC’s Statement on Longer-Run Goals and Monetary Policy Strategy, adopted in January 2012 and reaffirmed effective January 27, 2026, judges that "inflation at the rate of 2 percent, as measured by the annual change in the price index for personal consumption expenditures" is most consistent with the Fed’s mandate.

The statement itself doesn’t list reasons for choosing PCE, but the properties usually cited follow directly from how the index is built:

• Broader coverage. It counts spending on households’ behalf, such as medical care paid for by employer insurance or government programs, not only what comes out of pocket.
• Substitution. Its formula updates the basket’s composition every period, so when consumers shift from a product that got pricier to a cheaper one, the index reflects it quickly.
• Consistency with the national accounts. It is built from the same spending data as GDP, so inflation and real growth are measured on the same footing.
• Revisability. BEA revises PCE as more complete data arrive. That is a drawback for traders who want a final number on release day, but an advantage for policy that cares about getting the history right.

The four differences from the CPI

BEA’s explanation of the gap between the two indexes groups it into four effects.

Formula effect

The CPI uses a modified Laspeyres formula: it prices a basket whose quantities are fixed for a period, so it is slow to reflect consumers switching away from items whose prices rose. PCE uses a Fisher-Ideal formula, which combines the basket from the start and the end of each period. When people substitute toward cheaper goods, Fisher-Ideal inflation comes out lower. This is the most reliable reason CPI tends to run above PCE.

Weight effect

Even for the same item, the two indexes give different weights, because they come from different data. The CPI’s weights come from household surveys (the Consumer Expenditure Surveys). PCE’s come from business and government data in the national accounts. Housing is the largest example: shelter was 35.6% of the CPI-U in December 2025, and it carries a much smaller share of PCE because PCE’s basket is broader.

Scope effect

The CPI covers out-of-pocket spending by urban households. PCE covers spending by and for the whole personal sector, including nonprofit institutions serving households. Health care is the clearest case: the CPI includes only what households pay directly for medical care and insurance, while PCE also counts what employers and government programs pay for them.

Other effects

Differences in seasonal adjustment, in the individual prices used for some items and a residual that BEA does not break down further make up the rest.

How the two compare since 2015

The chart shows the three series moving together with CPI generally on top. Some numbers, all 12-month changes:

CPI and core CPI figures are computed from the seasonally adjusted series and match BLS’s published 12-month figures for September 2026. Three patterns stand out.

• CPI usually runs higher. From 2000 to 2019 the average gap was 0.34 point for headline and 0.28 for core. That fits the formula effect.
• The gap widens when inflation is high. In 2021–2022 the headline gap averaged 1.04 points. A bigger shelter weight and a slower-adjusting formula can both amplify a broad price surge in the CPI.
• It can flip. Core PCE was above core CPI every month from November 2025 through September 2026; in September the gap was about half a point the other way. The data show the reversal; the BEA and BLS sources used here do not explain it. One thing worth knowing when comparing them: BLS published no October 2025 CPI after a lapse in federal appropriations and carried September prices forward, which it notes may understate inflation in rising-price periods, while BEA’s PCE series has an October 2025 value.

The Fed’s target in practice

Over 2012–2019 core PCE inflation averaged 1.6%, and it was at or above 2% in only 6 of those 96 months. Since March 2021 it has not been below 2%; its low point since then was 2.6% in March 2025. Read against a 2% goal, those two stretches describe opposite problems: inflation persistently a little too low before the pandemic, and persistently above target after it.

A worked example

PCE’s index level was 132.257 in September 2026 (2017 = 100), up from 131.611 in August. The monthly change is 132.257 ÷ 131.611 − 1 = 0.49%. Compounded over a year, that monthly pace is 1.0049¹² − 1 = 6.0%, well above the 2% goal. The 12-month change, 3.6%, is the number the Fed’s goal refers to. As with the CPI, single months annualize into large numbers; look at the 12-month rate and at 3- and 6-month averages before drawing a conclusion.

Pitfalls and limitations

• Revisions. The PCE you read on release day can change. Monthly figures are revised in later reports and in BEA’s periodic updates, sometimes enough to change the story.
• Timing. PCE arrives after the CPI and PPI for the same month. Much of it can be estimated from those releases, so the PCE report itself often brings little surprise.
• Imputed prices. Some PCE components, such as financial services furnished without payment, rely on imputations rather than observed prices.
• Neither index is your inflation. Both are averages over very large populations.
• Headline vs core. The goal is on headline PCE; core PCE is a guide, not the target.

PCE and its neighbours

How Finabase does it

Finabase does not carry PCE, CPI or other macro data, and it has no economic calendar. The chart on this page is ours, built from BEA and BLS series downloaded through FRED on October 30, 2026.

What the app shows is how markets respond to inflation and Fed expectations. Short Treasury yields on the Treasury page, especially the 2-year, move with expectations for Fed policy, which depend on PCE trends. News and commentary on Fed decisions are in the Fed topic of Discover, and inflation data coverage is in the economy topic.

Frequently asked questions

Why does the Fed use PCE instead of CPI?

The FOMC’s goal is written in terms of PCE inflation. The index covers a broader range of spending, including what is paid on households’ behalf, adjusts faster when consumers switch products, and is consistent with the GDP accounts.

Is PCE inflation usually lower than CPI inflation?

Yes, usually. From 2000 to 2019 CPI inflation averaged about 0.34 point above PCE. The gap can close or reverse, as it did for the core measures in late 2025 and 2026.

When is the PCE report released?

BEA publishes it monthly in the Personal Income and Outlays report, near the end of the month after the reference month. The September 2026 data came out on October 29, 2026.

What is core PCE?

Core PCE is the PCE price index excluding food and energy. In September 2026 it was up 3.1% over the year. See Core inflation: why food and energy are left out.

Summary

The PCE price index measures the prices of everything consumers buy and everything bought on their behalf, using a Fisher-Ideal formula and national-accounts weights. The Fed has defined its 2% inflation goal on PCE since 2012. BEA traces the PCE–CPI gap to formula, weight, scope and other effects; in practice CPI inflation has run about a third of a point higher in normal times and about a point higher in the 2021–2022 surge. The relationship is not fixed: from late 2025 to September 2026 core PCE ran above core CPI, at 3.1% against 2.6%. To judge where the Fed stands relative to its goal, read PCE; to see the first look at the month, read the CPI two weeks earlier.