Why Are Gas Prices So High in Calgary? (Fall 2026 Update)

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If you've pulled up to a Calgary pump recently, you've felt it. Regular gas usually eases off as summer driving season ends, but this fall geopolitics and shifting government policy have kept prices near $1.70 a litre across much of the city — and diesel is far worse.

The short answer: Calgary gas prices are high in fall 2026 because the conflict involving the U.S., Israel and Iran has driven up world crude prices, a global diesel shortage is squeezing refined-fuel supply, and seasonal refinery maintenance is tightening local supply — while Alberta's 13¢/L fuel tax still applies. The federal excise tax pause, now extended to January 2027, is the main thing keeping prices from climbing another 10 cents.

Here's what's driving each piece of the price, and what to expect heading into winter.

1. Global conflict is pushing up crude oil

Roughly half of what you pay at the pump is the cost of crude oil. Crude is trading at a premium because of the escalating conflict in the Middle East involving the U.S., Israel and Iran, which has threatened tanker traffic through the Strait of Hormuz — one of the most important chokepoints for the world's oil supply.

"But Alberta produces its own oil" is the most common objection, and it's understandable. The catch is that crude is priced on a global market: Alberta producers sell at prices tied to benchmarks like West Texas Intermediate (WTI), and refiners pay those prices whether the barrel came from Fort McMurray or the Gulf. When world prices rise, wholesale gasoline rises everywhere, Calgary included. For a deeper look at how crude, the Edmonton wholesale rack and retail margins stack up, see our Alberta gas price trends for 2026.

2. The federal fuel tax pause has been extended

There is some good news from Ottawa. The federal fuel excise tax — 10¢/L on gasoline and 4¢/L on diesel — has been suspended since April 20, 2026, and was originally due to return after Labour Day. In early September the federal government extended the relief:

• Until January 31, 2027: excise fully suspended (0¢/L).
• February 1 – March 31, 2027: half rate (5¢/L gasoline, 2¢/L diesel).
• April 1, 2027: full 10¢/L and 4¢/L rates return.

That extension spares Calgary drivers an overnight 10-cent jump this fall, but it only softens the blow — it can't offset what crude has done to wholesale prices. Expect a two-step increase at the pump in February and April 2027 if nothing else changes.

3. The debate over Alberta's 13¢ provincial fuel tax

While the federal tax is paused, Alberta's 13-cent-per-litre fuel tax is still being collected, and it has become a political flashpoint. Calgary Mayor Jeromy Farkas has joined business and taxpayer groups in calling on Premier Danielle Smith to suspend it. The province has so far declined, pointing to its existing Fuel Tax Relief Program instead.

That program is automatic and oil-price-indexed. The rate is reset each quarter (January 1, April 1, July 1 and October 1) using the average WTI price over the 20 trading days leading up to the 16th of the month before:

In other words, a single spike isn't enough — oil has to stay high through the averaging window before the tax comes off. The full breakdown of every tax on a litre of Alberta gas is in our Alberta gas tax guide.

4. The diesel shortage is spilling over

It isn't only regular gasoline — diesel is in extraordinarily short supply. The International Energy Agency reports that Persian Gulf diesel exports have fallen to roughly a quarter of their pre-war level, while drone strikes have cut output at several major Russian refineries and Moscow has restricted diesel exports. Europe is competing hard for every available cargo.

In Alberta, some farmers say diesel is costing them about 80 cents per litre more than last year — right in the middle of harvest. Because diesel moves the trucks and trains that deliver almost everything we buy, persistently high diesel costs feed into broader inflation, from groceries to retail goods, heading into winter. If you drive a diesel vehicle, compare stations on our cheapest diesel in Calgary page — the station-to-station gap on diesel is often much wider than on regular.

5. Fall refinery maintenance season

On top of the global factors is a predictable local one. The major Edmonton-area refineries that supply Calgary typically schedule maintenance ("turnarounds") in the spring and fall. When a big unit slows down, wholesalers have to bring in refined gasoline from the U.S. or the West Coast, and even a brief local supply dip can add a few cents to Calgary pump prices for days or weeks.

What to expect this winter

• Crude remains the swing factor. Any easing of tension around the Strait of Hormuz would likely show up at Calgary pumps within a week or two; further escalation would do the opposite.
• October 1 Alberta fuel tax reset. Whether the provincial tax falls depends on where WTI averaged through mid-September.
• Refinery season ends. Once fall turnarounds wrap up, the local supply premium usually fades.
• February and April 2027. The federal excise returns in two steps: +5¢/L, then another +5¢/L on gasoline.

For a day-by-day view, check our Calgary gas prices tomorrow outlook or the fill up or wait verdict before you go.

How to protect your wallet

You can't control world oil markets or provincial tax policy, but you can control where and when you fill up. On any given day in Calgary, the cheapest station is typically 8 to 15 cents per litre cheaper than the most expensive — about $5 to $9 on a 60-litre tank.

• Check the cheapest gas prices in Calgary today before you leave, or browse the live price map.
• Narrow it to your side of the city: NW, NE, SW or SE Calgary.
• Set a free gas price alert so you hear about drops without checking.
• Time your fill-ups around the weekly cycle — see the best times to fill up in Calgary.

CheapGasCalgary.ca tracks fuel prices at stations across Calgary throughout the day, so you can find the best local deal and ride out this volatile market without overpaying.

FAQ

Sources

• Department of Finance Canada — federal fuel excise tax relief extension (September 2026)
• Alberta.ca — Fuel tax overview and Fuel Tax Relief Program
• IEA — Oil Market Report, September 2026
• LiveWire Calgary — Calgary mayor joins call for Alberta fuel tax relief
• CBC News — Why high diesel prices may reach the grocery store

Related: Alberta Gas Tax Breakdown · Gas Price Trends in Alberta 2026 · 5 Ways to Save on Gas in Calgary