Canada’s March Inflation Came In at 2.4%: What the Gasoline Number Hides and What the BoC Sees

Statistics Canada published March CPI data this morning confirming what economists had anticipated: the Iran war’s energy shock has entered Canada’s price data in a significant way. Headline inflation rose to 2.4% year-over-year in March, up from 1.8% in February, with the monthly increase of 0.9% driven almost entirely by gasoline. The 21.2% month-over-month jump in pump prices is the largest single-month increase on record for data going back to 1950, topping the 17% rebound in the immediate post-pandemic period of April-May 2020. That data point is alarming in isolation. In context, it is more manageable than it appears.

What the Headline Masks

The distinction that matters most for interpreting today’s data is between headline CPI and core inflation. Headline includes energy and food, two categories that are highly volatile and frequently driven by external shocks unrelated to domestic monetary conditions. Core measures, which the Bank of Canada monitors most closely as indicators of underlying price pressure, strip out those categories and focus on whether inflationary psychology is embedding itself in the broad economy.

In March, core inflation remained close to 2%. The energy spike has not yet transmitted into broad categories of goods and services in a measurable way. RBC senior economist Claire Fan noted that jet fuel costs have risen substantially and could flow through to airfares and freight costs in coming months, but that transmission typically takes two to three months to appear in consumer price data. Douglas Porter of BMO identified food prices as a secondary watch item, projecting that food inflation could average above 4% this year if energy costs stay elevated, but noted that February’s grocery data had already shown improvement before the energy shock fully arrived.

The Forward Look: April and May

National Bank of Canada economist Alexandra Ducharme projects April CPI will reach 3.2%, as the full force of elevated gasoline prices hits a complete calendar month of data for the first time. BMO’s Douglas Porter sees April coming in around 3%, with risks to the upside if oil stays above $90/barrel. The timing matters: April CPI will not be published until mid-May, and the Bank of Canada’s April 29 rate decision will be made before that data exists. The BoC is essentially committing to a hold based on its judgment that the March print confirms the energy-driven spike thesis and that core measures have not yet deteriorated.

What would change that judgment? TD Economics has identified two trigger conditions: first, evidence that inflation expectations are becoming unanchored, meaning households and businesses are beginning to build higher expected inflation into wages, contracts, and pricing decisions; second, evidence that the energy shock is transmitting into core categories at a pace that cannot be attributed to temporary supply-chain effects. Neither condition is yet evident in the data. Until one of them appears, the Bank’s stated posture is to watch and hold.

The federal fuel excise suspension, which took effect this morning, provides a mechanical tailwind for the April and May CPI readings. If the 10 cents per litre reduction is passed through fully by retailers, it will dampen the April headline number by approximately 0.2 to 0.3 percentage points relative to where it would have landed without the measure. That is not sufficient to push April CPI back below 2%, but it reduces the probability of a print above 3.5% that would genuinely test the Bank’s “look-through” guidance.

The Risk the Bank Cannot Ignore

The scenario that most concerns economists is a sustained Hormuz closure running through June and July. Desjardins deputy chief economist Randall Bartlett has laid out the transmission channels: gasoline to diesel to freight costs to food to services, with each step taking approximately six to eight weeks to appear in CPI. If oil stays above $90 for another three months, the secondary transmission effects would start showing up in August and September data, at which point the Bank of Canada would face a genuinely difficult choice between holding rates into a weakening domestic economy or hiking into a supply-driven inflation shock. That was the dilemma of 2022, and the Canadian economy is materially weaker heading into it this time than it was then. The unemployment rate sat at 6.7% in February, exports were down approximately 4%, and household spending is constrained by mortgage renewal costs. A rate hike into that backdrop would be a significantly more disruptive tool than it was in 2022. The market is not pricing that scenario. But it is the scenario the Bank is working to avoid by holding its nerve in the near term.