⁠Gas Tax Holiday Ends Sept. 7; Expert Sees 10–11¢-a-Litre Jump Before Winter Fuel Brings Relief

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Canada’s temporary break from the federal fuel excise tax is approaching its scheduled end, setting up an unusual September at gas stations. The federal government suspended the 10-cent-per-litre gasoline excise tax from April 20 through Labour Day, Sept. 7, meaning the full levy is scheduled to return on Sept. 8 unless Ottawa changes course.

Fuel-price analyst Dan McTeague has estimated that motorists could see pump prices rise roughly 10 to 11 cents per litre as the tax returns. Yet that increase may be partly reversed surprisingly quickly. The annual transition toward cheaper winter-grade gasoline begins later in September and could shave roughly eight to nine cents per litre from prices, according to McTeague. That leaves Canadian drivers facing a potentially sharp but complicated price swing before autumn settles in.

The Sept. 8 Tax Reset Is Already on the Calendar

The federal fuel-tax holiday was introduced during a period of unusually high energy prices. Ottawa suspended its excise tax on gasoline and unleaded aviation gasoline, normally 10 cents per litre, along with the four-cent-per-litre excise tax applying to diesel and other aviation fuels. The measure runs from April 20 through Sept. 7 inclusive, with the normal rates scheduled to return the next day. Finance Canada estimates the temporary suspension will provide more than $2.4 billion in tax relief during 2026.

Although consumers generally experience the tax as part of the pump price, the federal excise levy is technically collected from manufacturers or wholesalers and becomes embedded in the retail cost of fuel. That distinction matters because Sept. 8 is not simply an arbitrary date when individual stations may choose to raise prices. Barring an extension from Ottawa, the tax structure itself changes, creating an immediate additional cost that can work its way through wholesale and retail pricing.

A 10–11¢ Increase Becomes Noticeable on Every Fill-Up

McTeague, president of Canadians for Affordable Energy, has estimated that restoring the excise tax could translate into an approximately 10- to 11-cent-per-litre increase at Canadian pumps, although the precise impact would vary between markets. CAA’s national average stood at about 167 cents per litre on Aug. 15. If nothing else changed and the full estimated increase were simply added to that price, gasoline would temporarily land around 177 to 178 cents per litre. That is an illustration rather than a forecast, because crude oil, wholesale markets and local competition continue moving every day.

The household math makes even a short-lived increase tangible. Filling a 50-litre tank would cost roughly $5 to $5.50 more with a 10- to 11-cent increase, while a 60-litre fill would cost approximately $6 to $6.60 more. For someone commuting long distances, running a delivery vehicle or driving children between school and activities, those relatively small amounts can accumulate quickly. The increase is especially noticeable because it arrives all at once rather than gradually.

Winter-Grade Gasoline Could Reverse Much of the Increase

The calendar creates an unusual second act. Canadian fuel markets typically transition away from more expensive summer-grade gasoline as temperatures cool. McTeague expects the shift toward winter fuel to begin after roughly Sept. 15 and estimates it could reduce retail gasoline prices by around eight to nine cents per litre. If that occurs shortly after the excise tax returns, motorists could experience a sharp increase followed by a substantial partial reversal within a relatively narrow period.

The difference comes partly from how gasoline must perform under changing temperatures. Summer gasoline is formulated to control volatility and reduce evaporative emissions during hot weather. Winter gasoline can contain more inexpensive butane, which increases volatility and helps fuel vaporize under colder conditions. Environment and Climate Change Canada confirms that butane is blended into gasoline to increase volatility and octane. In a simplified scenario, a 10- to 11-cent tax-related increase followed by an eight- to nine-cent seasonal decline would leave only a few cents of the initial jump remaining. Actual retail prices, however, could move differently.

The Tax Date Is Predictable, but Global Oil Markets Are Not

One reason the September outcome cannot be calculated with certainty is that taxes represent only one part of gasoline pricing. Crude oil costs, refinery margins, exchange rates, transportation expenses, regional competition and unexpected supply disruptions can all move while the tax and seasonal-blend changes are taking place. CAA notes that retail gasoline prices vary across Canada because of differences in taxation, competition, distribution and broader commodity-market conditions.

Global energy markets are particularly unsettled in 2026. The International Energy Agency’s August Oil Market Report said global oil supply remained substantially below year-earlier levels and described risks surrounding the Strait of Hormuz as significant. Around 20 million barrels per day of crude oil and petroleum products moved through the strait on average in 2025, representing roughly one-quarter of global seaborne oil trade. Canada is itself a major oil producer, but gasoline prices do not operate in isolation from international crude and refined-product markets. A fresh geopolitical shock could therefore overwhelm the expected seasonal savings.

Canadians Are Already Paying Much More Than Last Summer

The September tax change will arrive after a year in which fuel prices have already moved dramatically. CAA reported a national average gasoline price of 167.0 cents per litre on Aug. 15, compared with 132.6 cents per litre one year earlier. That difference of 34.4 cents works out to an increase of roughly 26 per cent. CAA’s data also show how volatile the market has been: the national average reached 190.4 cents per litre on May 6, while prices during the preceding month alone ranged from roughly 153.3 cents to 180.3 cents.

For an ordinary 50-litre purchase, the difference between the Aug. 15 national average and the year-earlier level amounts to about $17.20. That is enough to make fuel costs visible in household decisions that once seemed routine, from an extra weekend drive to the economics of a longer commute. It also provides important context: even if winter-grade gasoline offsets much of September’s tax increase, motorists would still be dealing with a fuel market considerably more expensive than a year earlier.

Gas Prices Are Affecting More Than Transportation Budgets

Gasoline has become influential enough to shape Canada’s broader inflation numbers. Statistics Canada reported that the Consumer Price Index rose 2.8 per cent year over year in June, down from 3.2 per cent in May, with slower gasoline-price growth contributing significantly to the deceleration. That makes the upcoming excise-tax restoration economically relevant beyond what appears on service-station signs.

The Bank of Canada has also highlighted fuel’s role in recent inflation. In its July monetary policy assessment, the central bank said the jump in headline inflation to 3.2 per cent in May was mainly the result of higher gasoline prices associated with the Middle East conflict. It noted that inflation excluding gasoline was substantially lower and that near-term consumer inflation expectations can be sensitive to what happens at the pump. A September tax increase would not automatically determine the broader inflation trend—food, housing, services and many other prices matter—but another conspicuous rise in gasoline could influence both measured inflation and how households perceive their cost of living.

Political Pressure Is Growing to Keep the Holiday Alive

Whether the scheduled Sept. 8 increase actually arrives still depends on Ottawa. Ontario Premier Doug Ford has publicly called on Prime Minister Mark Carney’s government to extend the federal excise-tax suspension until at least Jan. 1, 2027, or make the relief permanent. Conservative Leader Pierre Poilievre has also pushed for continued and broader fuel-tax reductions. Ontario already reduced its own provincial gasoline tax beginning in 2022 and later made the lower rate permanent, adding another layer to the political debate over pump prices.

As of mid-August, however, the federal government had not announced that the Sept. 7 expiration would be changed. Extending the holiday would provide additional relief to drivers and fuel-dependent businesses, but it would also extend the fiscal cost of the measure. Finance Canada’s estimate of more than $2.4 billion in relief from the existing suspension illustrates the scale involved. That leaves Ottawa balancing immediate affordability concerns against federal revenue needs as the deadline approaches.

September Could Produce a Short, Sharp Price Roller Coaster

Taken together, the available evidence points toward a potentially unusual sequence rather than a simple permanent 10-cent increase. The first major change is scheduled for Sept. 8, when the federal excise tax returns. The second could arrive roughly a week later as winter-grade fuel begins replacing summer gasoline. McTeague has characterized the resulting pattern as a possible brief period of unusually high prices before seasonal savings begin offsetting much of the tax increase.

There is no guarantee that Canadians will see a clean 10-cent rise followed by an eight-cent decline. Regional taxes, refinery conditions, wholesale gasoline prices, the Canadian dollar, local competition and international oil markets can push prices in either direction at the same time. The most defensible expectation is therefore a period of increased volatility around early and mid-September. For households already paying substantially more for gasoline than they did a year ago, even a temporary spike will be noticeable—and whether Ottawa extends the tax holiday could determine whether that spike arrives at all.

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