Why gas prices differ so much by province

Published on 2026-09-22

The crude is the same, the refining is largely the same, and yet the board price can differ by more than 30 cents a litre between one province and the next. Almost all of that is decided before a single drop reaches the pump.

Four layers on the same litre

Federal excise applies everywhere at the same rate. On top of it sits the provincial fuel tax, which differs substantially by province; carbon pricing, which differs by province and by year; and in three metropolitan areas — Metro Vancouver, Montréal and Greater Victoria — a dedicated transit levy.

Then sales tax applies on top of the whole stack, which means a province with a higher fuel tax also collects more sales tax on the same litre.

Why the national average is useless to you

A Canadian average blends a Vancouver litre carrying a transit levy with a litre in a province that charges considerably less fuel tax. The number it produces describes nobody's actual purchase.

The comparison that changes what you pay is the one between stations you can reach today — a few kilometres, not a few provinces.

What is left for the retailer

After tax and wholesale cost, the retail margin is the thinnest layer, and it is the only one that differs between two stations on the same street. That is exactly why that difference is worth hunting: it is the part anyone is actually competing over.

Ten to fifteen cents of retail margin spread on a 50-litre fill is $5 to $8 — real money, and the only part you can choose.

The two provinces that cap it

New Brunswick and Prince Edward Island set a maximum retail price each week through their energy boards. It is a ceiling, not a fixed price: stations may sell below it, and the cheapest ones do.

Nova Scotia and Newfoundland also regulate, but by zone rather than province-wide, and no station-level record says which zone a site falls in. Refil leaves the regulated maximum off in those two rather than attach the wrong one.

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