Americans buy gasoline by the gallon in US dollars; Canadians by the litre in Canadian dollars. Strip away the units and the two prices move in near-lockstep — because they're pumped from the same world oil price. Where they diverge is tax — and in 2025–26 the Canadian side of that gap changed more than it had in a generation.
Sources: EIA/FRED GASREGM (US regular, USD/gal); Statistics Canada Table 18-10-0001 (regular self-serve, ¢/L); FRED EXCAUS (CAD/USD); FRED WTISPLC (WTI crude). Monthly. Canada's national series begins 2006. Toggle the unit, or overlay crude to see the lockstep. Retrieved Aug 2026.
A first-draft write-up — the data are real; the words are a starting point to argue with.
Flip the chart to USD per litre and the two lines almost trace each other. That's not a coincidence: crude oil is a single global commodity, so the biggest input to a litre of gas in Calgary and a gallon in Cleveland is the same barrel. Hit + crude oil and watch the WTI line (rescaled to show shape) run through the middle of both — the 2008 spike and crash, the 2014–16 oil glut that made gas cheap, the 2020 COVID collapse, and the 2022 post-invasion spike that pushed US regular toward $5/gal and Canadian pumps past 215¢/L.
In native units the numbers look unrelated — one climbs from about $2 to $5, the other from 80¢ to 215¢ — which is exactly why cross-border gas comparisons confuse people. The rulers differ; the underlying price barely does.
Put both on the same footing and Canada sits a little higher per litre almost always. The reason isn't crude and it isn't refining — it's the tax slice.
A representative 2026 pump litre, in Canadian cents. US split from EIA's “what we pay for in a gallon” (May 2026); Canadian taxes from NRCan fuel levies (Ontario shown). Crude oil is the same world price for both; refining + marketing is the residual. Currency-converted at the current rate.
Crude costs both countries about the same per litre. Put the taxes in the same currency and the gap is clean: US taxes come to about 20¢/L (≈13–14¢ in USD — a federal 18.4¢/gallon plus a ~33¢/gallon state average, and most states don't even charge sales tax on gas), while a structural Canadian litre (Ontario) carries closer to 39¢/L once the federal 10¢ excise, the provincial 9¢, and 13% HST are stacked up. Litre for litre, in Canadian cents, that's roughly double the US tax burden.
Two policy moves shrank the Canadian tax slice in quick succession:
Stack those on top of a weak Canadian dollar (about 1.41 to the greenback) and an unusually high US pump price in 2026, and the historic “Canadians pay way more” gap has narrowed to something modest. The structural difference is still there — Canada taxes fuel roughly twice as hard — but 2026 is a temporary truce, and the excise holiday reverts on September 8.
“Canada” hides an enormous spread. The government's cut of a litre ranges from about 21¢ in Alberta to over 50¢ in Metro Vancouver, where a 27¢/L provincial-plus-TransLink fuel tax piles on. That shows up directly at the pump:
Source: Statistics Canada Table 18-10-0001, regular self-serve, latest month. The Vancouver–Edmonton spread is roughly 47¢/L — mostly tax and distribution, not crude.
Vancouver and Victoria sit at the top, the Prairie cities at the bottom, with a ~47¢/L gap end to end — for the same fuel, from the same crude. Almost all of that spread is tax and the cost of hauling fuel to where people live.
Comparable measurement across countries, currencies, and definitions — done carefully, with the caveats named.