The Bank of Canada raised its overnight rate by a quarter point to 2.50% on October 28, its first increase since July 2023. The decision came with headline CPI at 3.1% in September and the two core measures the Bank watches most closely at 1.8% for CPI-trim and 1.9% for CPI-median, according to Statistics Canada.

That gap is the story. The Bank did not respond to the inflation that Canadians measured in September. It responded to the inflation it now forecasts.

The Gap Between Headline and Core Is 1.3 Points

Headline CPI has risen from 2.4% to 3.1% over 13 months while CPI-trim has fallen from 3.1% to 1.8%, so the two measures crossed in March and now sit 1.3 points apart.

CANADA CPI: HEADLINE VS CORE 3.1% ▲ 0.1 PT FROM AUGUST MONTHLY  |  SEP 2025 TO SEP 2026
Source: Bank of Canada, CPI and measures of core inflation, based on Statistics Canada data, Sep 2025 to Sep 2026.  |  hdq.ca

Series are annual percentage changes in total CPI, CPI-trim and CPI-common. CPI-median, the third core measure, stood at 1.9% in September.

Energy prices were up 19% from a year earlier in September, The Hub reported, and CPI excluding gasoline eased to 2.2% from 2.4% in August, according to Statistics Canada. The average of CPI-trim and CPI-median, 1.85%, was the lowest reading in the 13 months charted.

A headline rate carried by energy and core measures near 2% is the pattern of a price shock that has not yet spread. The Bank is acting on the risk that it will.

The Hike Responds to a Forecast, Not a Print

The October Monetary Policy Report projects inflation averaging 2.9% in 2026 and 3.1% in 2027, up 0.4 and 1.1 percentage points from July, with a return near 2% not until mid-2028, The Hub reported. Governor Tiff Macklem said further increases could not be ruled out and that the Bank would decide one meeting at a time. The stated aim is to keep energy prices from spilling into broad inflation.

The economy gave the Bank room. Second-quarter growth was 3.3% annualized, the Bank now forecasts 1% growth for 2026, up from 0.7% in July, and it expects about 2% growth in the third quarter. Macklem acknowledged the case for holding: inflation is concentrated in energy and energy-heavy services such as airfares, slack remains, and new U.S. tariffs are expected to slow fourth-quarter growth.

Three Inputs Decide December 9

The first input is oil. Reuters reported on Monday that oil fell more than 7% on hopes of a U.S.-Iran peace deal. A sustained decline would remove the energy component that justified the forecast, and a reversal would reinforce it.

The second is the October CPI report, due before the December 9 decision. It will show whether CPI-trim and CPI-median keep falling or turn up. Core inflation near 2% means the Bank has no evidence yet of the second-round effects it is guarding against, so the forecast carries the decision and the data have not yet confirmed it. The third is trade policy, which The Hub names with energy as the two largest risks to the inflation outlook.

The transmission is direct for some borrowers. Variable-rate mortgages and prime-linked credit lines reprice with the policy rate, so the quarter-point increase reaches them immediately. Fixed-rate pricing follows Government of Canada bond yields, which respond to the expected path of rates rather than to the decision itself.