CPI vs Core CPI vs PCE: Which Number to Use

Prosperics' Inflation Tracker (prosperics.com/inflation-tracker) shows the latest US and Canada inflation prints side by side, but the number in a headline is not always the number that answers your question. Three US series get mixed up constantly, and Canada publishes a fourth family of its own.

Headline CPI is the Consumer Price Index for All Urban Consumers (CPI-U) from the Bureau of Labor Statistics. It tracks the out-of-pocket cost of a fixed basket of goods and services for urban households, including food and energy. Core CPI is that same index with food and energy removed, because those two categories jump around for reasons that have little to do with the broader trend. The PCE price index, from the Bureau of Economic Analysis, covers what is spent on behalf of households as well as by them, so employer-paid health insurance is in PCE and mostly absent from CPI. PCE also lets people substitute cheaper goods when prices change; CPI holds the basket fixed for longer. Housing, especially owners' equivalent rent, is a much larger share of CPI than of PCE, and medical care is a much larger share of PCE.

Canada does not use any of those US series. Statistics Canada publishes the Consumer Price Index, and the Bank of Canada targets the 12-month change in total CPI at the 2 percent midpoint of a 1 to 3 percent band. For a cleaner read it prefers two core measures, CPI-median and CPI-trim, not US core CPI and not PCE.

How the basket is built, how inflation hits different assets, and how TIPS work are covered in the longer guide at prosperics.com/learn/inflation-cpi-tips. This page is only about which published number to use.

Match the number to the decision, then read the latest print on the tracker instead of a month-old article.

A raise, a household budget, or a lease renewal in the United States should start from headline CPI. That is the series that includes the food, gasoline and rent you actually pay. Core CPI is the wrong series for a cost-of-living conversation: it is useful precisely because it ignores the bills that moved. In Canada, use the all-items CPI for your experience of prices, and do not import a US CPI figure. The two countries do not share a basket, a housing method, or a release calendar.

A question about whether inflation is sticky, once food and energy noise is set aside, is a core question. In the US that is core CPI, or core PCE if you are talking about the Federal Reserve. In Canada it is CPI-median or CPI-trim.

The Federal Reserve's longer-run inflation goal is 2 percent inflation in the price index for personal consumption expenditures, not CPI. When a news story says inflation is above or below the Fed's target, the honest comparison is the 12-month change in PCE. Core PCE is what officials watch to see the trend under that target. The Bank of Canada's target, by contrast, is total CPI. Comparing a Canadian CPI print to the Fed's PCE goal, or a US CPI print to the Bank of Canada's target, answers neither institution's question.

Treasury Inflation-Protected Securities and Series I savings bonds adjust with CPI-U, not with PCE and not with core CPI. If you are deciding whether TIPS or a nominal Treasury fits you, the inflation assumption has to be headline CPI. The methodology guide explains the TIPS mechanics; the tracker is where the current CPI prints live.

Five substitutions show up in almost every bad comparison. First, quoting a one-month change as if it were the 2 percent target. Targets are 12-month rates. A single month, especially annualized, swings with gasoline and should not be lined up against either central bank's goal. Second, treating core as what life costs. Core can look calm in a year when food or energy is the entire household story, and it can look hot when the thing you buy every week has already cooled. Third, shelter. CPI rent and owners' equivalent rent move months behind listed rents and home prices, so a CPI print can still be rising after the housing market you shop in has flattened. Fourth, base effects. A very high reading 12 months ago makes this month's year-over-year rate look low even if prices are still climbing, and the reverse is also true. Fifth, country and index mixing: a US core CPI beat is not a Bank of Canada story, and a PCE miss is not a TIPS story.

The Prosperics tracker separates the US and Canada headlines and states when each series was last updated, so the comparison stays on the release you mean. Use it for the current number, use this page to pick the series, and use prosperics.com/learn/inflation-cpi-tips when you need the basket, the policy lag, or the inflation-protected bond detail.