Canada Post's 44.50% fuel surcharge: the September 21–27 shipping budget check

Rates checked September 23, 2026. This update covers September 21–27, 2026; check the linked carrier page for later weeks.

Canada Post's published domestic fuel surcharge increased to 44.50% for September 21–27, 2026, from 41.00% for September 14–20. The domestic category covers Priority, Xpresspost, Expedited Parcel and Regular Parcel, according to its current fuel surcharge page.

For an ecommerce brand, the useful question is how many dollars that adds to the orders you expect to ship. Start with the amount subject to fuel, then check how that cost reaches your invoice and customer checkout.

Calculate the increase on the right amount

The change is 3.50 percentage points. It does not mean your entire shipping bill increased by 3.5%.

Canada Post's Parcel Services Customer Guide, section 6.6.1 says fuel applies to base shipping prices and applicable additional weight charges. For this calculation, call that combined amount the eligible charge basis. Confirm the applicable amount and any account-specific pricing with the party billing you.

Consider a hypothetical shipment with an unchanged CAD $10.00 eligible charge basis:

The increase is CAD $0.35 per shipment. Across 1,000 otherwise unchanged shipments, that is CAD $350 before tax and other charges. In this simplified example, the basis-plus-fuel subtotal rises by approximately 2.48%.

Use your own eligible charges in place of $10.00. A single average hides the difference between a lightweight local order and a heavier shipment travelling farther.

Check how your shipping account handles fuel

Before editing your budget, identify how you buy labels. You might pay Canada Post directly, purchase through a shipping platform, or receive freight charges from a fulfillment provider.

Ask four specific questions:

• Does the quoted shipping price already include fuel?
• Is fuel shown separately on the invoice, and what amount is it applied to?
• Which effective date determines the surcharge on this shipment?
• Do the account terms change how the published surcharge reaches our bill?

Keep the answer with your rate sheet. If a quoted rate already includes fuel, adding 44.50% again would overstate the cost. If your budget excludes it, the opposite problem appears: orders look more profitable than the shipping invoice supports.

The published domestic percentage also should not be copied onto your U.S. and international shipments. Canada Post lists those service categories separately. Match the service before using a percentage.

Audit a small group of actual shipments

Pull a manageable sample from the current week, including your common parcel sizes and destinations. Compare the label quote, invoice detail and order record using the same tracking number.

Record the service, relevant shipment date, eligible charges, fuel percentage, fuel dollars, other charges, tax and final billed amount. Keep corrections or later adjustments visible rather than replacing the original quote without explanation.

Recalculate the fuel line using the confirmed charge basis. If it differs, ask the billing party to explain the difference before treating it as an error. Account terms, dates, rounding or a different underlying charge may explain it.

Then compare similar shipments across the two weeks. If last week's sample was mostly nearby deliveries and this week's was mostly distant destinations, the total change cannot be attributed to fuel alone. Hold package, service and destination characteristics as steady as possible.

Update the forecast without assuming this rate lasts

For a like-for-like forecast, multiply the expected eligible domestic charges by 0.035 to estimate the additional fuel cost relative to last week's percentage. This isolates the surcharge movement while holding the shipment mix and eligible charges constant.

Build the forecast by your main parcel and destination groups, then add the results. Keep changes in volume, carrier mix and base pricing in separate columns so you can explain why the total moved.

Canada Post says it updates fuel weekly, with changes taking effect on Mondays. Treat this week's percentage as a dated planning input. For a longer budget, test several explicitly labelled surcharge assumptions rather than presenting the current rate as a forecast.

Check the orders where shipping absorbs the margin

Review low-value baskets, free-shipping orders and destinations where your flat shipping fee already covers only part of the cost. Compare customer shipping revenue with the full shipping charge, then include packaging and fulfillment when assessing the order's contribution.

A small per-parcel movement may be acceptable on a healthy basket and material on a heavily discounted one. Use actual order economics before changing a free-shipping threshold or customer fee.

If you compare carriers, request an all-in quote for the same parcel, destination and required service. The lowest fuel percentage alone does not establish the lowest total price or an acceptable delivery option.

Assign one person to check the published schedule each week, update the budget assumption and review invoice exceptions. This week, start by confirming the fuel treatment on your own account and recalculating your expected domestic shipment costs for September 21–27.

For other carrier changes and service alerts, see our Canada and U.S. shipping updates. This article’s fuel percentage remains specific to the September 21–27 period stated above.