TL;DR: On April 1, 2027, Canada's federal carbon price climbs from $95 to $110 per tonne of CO₂, lifting the diesel fuel charge from roughly 20.9¢ to 24.2¢ per litre — a 3.3¢ increase. For a highway tractor running 200,000 km/year at 36 L/100 km, that is an extra $2,376 in carbon levy alone compared with 2026.
Canada's carbon pricing schedule is legislated through 2030 under the Greenhouse Gas Pollution Pricing Act. Every April 1, the rate steps up by $15 per tonne of CO₂ equivalent. The April 1, 2027 increase is already locked in — and for trucking companies that run on diesel, the compounding effect is now large enough to warrant a dedicated line item on every rate confirmation.
How much is Canada's carbon tax on diesel in 2027?
The federal fuel charge applies to combustion fuels at a rate derived from their CO₂ emission factor. For diesel, the published emission factor is 2.670 kg CO₂e per litre (federal technical schedule; the task brief uses 2.681 kg CO₂e/L — both figures appear in government documentation; the difference rounds to less than 0.03¢/L at current rates).
Working through the math:
| Year | Carbon Price | Calculation | Per-Litre Fuel Charge |
|---|---|---|---|
| 2025 | $80/tonne | $80 × 2.670 ÷ 1,000 | ~21.4¢/L |
| 2026 | $95/tonne | $95 × 2.670 ÷ 1,000 | ~20.9¢/L (published rate) |
| 2027 | $110/tonne | $110 × 2.670 ÷ 1,000 | ~24.2¢/L |
| 2030 | $170/tonne | $170 × 2.670 ÷ 1,000 | ~37.4¢/L |
The published 2026 federal fuel charge for diesel is 20.89¢/L, with the 2027 rate landing at approximately 24.2¢/L — an increase of 3.3¢/L.
To put that in context: when the carbon tax launched at $20/tonne in 2019, the diesel levy was roughly 5.3¢/L. By 2027 it will be four and a half times that. The step from 2026 to 2027 alone is larger than the entire 2019 starting rate.
For a deeper look at where 2026 costs stood before this increase, see our 2026 carbon tax impact on trucking analysis.
How does the 2027 increase break down by province?
Not every province runs on the federal backstop. Canada has a patchwork of systems, and the federal fuel charge only applies where a province has not implemented an equivalent mechanism.
Federal Fuel Charge (backstop) provinces — 2027 rate applies directly: Alberta, Saskatchewan, Manitoba, Ontario, New Brunswick, Nova Scotia, Prince Edward Island, and Newfoundland and Labrador. These fleets will see the full 3.3¢/L step on April 1, 2027.
British Columbia — provincial carbon tax: BC operates its own carbon tax, aligned with or above the federal price floor. BC's rate has tracked the federal schedule and is expected to reach $110/tonne in 2027, producing a similar per-litre impact on diesel. Carriers operating exclusively in BC pay the provincial levy, not the federal fuel charge — but the cost outcome is nearly identical.
Quebec — cap-and-trade (SPEDE): Quebec participates in the Western Climate Initiative cap-and-trade system with California. Carbon costs are embedded in fuel prices through allowance market pricing rather than a fixed per-litre levy. The effective per-litre cost floats with quarterly auction prices, but has historically tracked close to the federal schedule. Carriers cannot claim the federal fuel charge rebate on Quebec-purchased fuel because the federal backstop does not apply in Quebec.
Practical implication for cross-border fleets: If you're running a Toronto–Calgary or Winnipeg–Montreal lane, your diesel cost base includes federal fuel charges in Ontario and the backstop provinces but Quebec's cap-and-trade mechanism on the eastern leg. Blending these in your cost model matters — don't apply the federal rate uniformly across all fuel purchases.
What does this cost a typical fleet?
Using a standard highway tractor at 36 litres per 100 km (a reasonable average for a loaded Class 8 on mixed highway):
| Annual km | Diesel litres (~36 L/100 km) | 2026 carbon tax cost (CAD) | 2027 carbon tax cost (CAD) | Δ |
|---|---|---|---|---|
| 100,000 | 36,000 | $7,524 | $8,712 | +$1,188 |
| 150,000 | 54,000 | $11,286 | $13,068 | +$1,782 |
| 200,000 | 72,000 | $15,048 | $17,424 | +$2,376 |
| 250,000 | 90,000 | $18,810 | $21,780 | +$2,970 |
Source: Federal Fuel Charge schedule under the Greenhouse Gas Pollution Pricing Act; 2026 rate $0.2089/L, 2027 rate $0.2420/L. Figures assume diesel emission factor of 2.670 kg CO₂e/L. Provincial systems (BC carbon tax, Quebec cap-and-trade) substitute the federal backstop — effective cost is similar but recovery mechanism differs.
Scaling across a fleet:
- 1 truck at 200,000 km/year: +$2,376/year versus 2026
- 10 trucks: +$23,760/year
- 100 trucks: +$237,600/year
That last number — nearly a quarter million dollars in additional carbon levy for a 100-truck fleet doing typical highway mileage — is not noise. It needs to be in your 2027 budget before you finalize customer rate negotiations this fall.
For fuel price forecasting context alongside the carbon levy trajectory, the Q3 2026 diesel forecast covers base diesel pricing trends you can layer on top of these figures.
How should carriers structure carbon-tax recovery?
The worst approach is burying the carbon tax in a blended rate. When customers see a flat freight rate with no explanation of the embedded carbon component, two things happen: they push back on rate increases without understanding what is driving them, and you absorb downward pressure on a cost you cannot control.
Separate it as an accessorial line.
A carbon-tax surcharge should appear as its own line on every rate confirmation, quoted in cents per litre or as a flat fee per load based on estimated kilometres. This does three things:
- Transparency: Customers understand they are paying a legislated government levy, not a carrier margin play. This materially reduces billing disputes when rates step up on April 1.
- Passthrough clarity: If the rate changes — in either direction — you can adjust the accessorial without renegotiating the base freight rate.
- Audit trail: In the event of a CRA audit or customer dispute, you have a documented, policy-linked cost line rather than an unexplained rate variance.
Customer communication cadence:
- September–October 2026: Notify customers in writing that the federal carbon levy increases on April 1, 2027, and that your carbon-tax accessorial will adjust accordingly. Include the per-litre figures.
- March 2027: Send a reminder with the confirmed 24.2¢/L rate and updated per-load estimates.
- April 1, 2027: Apply the new rate automatically on all rate-cons issued on or after this date.
Carriers who do this proactively rarely face dispute. Carriers who let the April 1 increase hit invoices without advance notice reliably trigger collections friction.
For the mechanics of calculating and presenting fuel-related surcharges, the fuel surcharge guide covers the per-kilometre and per-load calculation frameworks that apply equally to carbon-tax accessorials.
Will the carbon-tax-on-tax issue change?
One of the most-discussed industry grievances is that GST/HST is charged on top of the federal fuel charge — meaning carriers pay tax on a tax. At 24.2¢/L plus 5% GST, that is an additional ~1.2¢/L in GST that carriers pay but cannot always recover through input tax credits when the fuel is purchased for mixed commercial/exempt use.
Current status: The Greenhouse Gas Pollution Pricing Act does not exempt the fuel charge from GST/HST. The federal government's position has been that the fuel charge is a regulatory levy, not a tax, and that normal GST rules apply. Registered businesses generally recover GST through input tax credits — so for most incorporated carriers, the GST-on-carbon-charge is a cash-flow issue rather than a permanent cost. Owner-operators claiming the simplified method may see partial recovery only.
Policy proposals: Various industry groups, including the Canadian Trucking Alliance, have advocated for GST relief on the fuel charge or an accelerated rebate mechanism for commercial operators. As of the writing of this article, no legislative change has been enacted. Any carrier factoring GST relief into forward cost models is doing so without a legislative basis.
What to plan for: Budget the full 24.2¢/L plus applicable GST/HST on diesel purchases in backstop provinces for 2027. If GST relief passes, it becomes a windfall — not a baseline assumption.
Automate your carbon-tax surcharge with TruckerPro
Managing a carbon-tax accessorial manually across hundreds of loads is error-prone — especially when the rate changes every April 1. TruckerPro rate confirmations support a dedicated carbon-tax surcharge line, separate from base freight and fuel surcharge, so every rate-con your customers receive shows the policy-driven levy as a transparent, auditable line item.
When April 1, 2027 arrives, you update one number in your settings and it flows to every new rate-con automatically — no manual edits, no missed loads, no billing disputes about where the increase came from.
Use the fuel surcharge calculator to model your per-load carbon-tax recovery amounts before you set your accessorial rate for 2027 contract season.