Khalil Ladak
13 mins read
16 mins read
Ahmad Al Abid specializes in designing courier and freight solutions for businesses scaling across Canada and the U.S. He applies a problem-solving approach to simplify complex logistics challenges, delivering clear, actionable strategies that improve operational efficiency and reduce costs.
A pallet of sunscreen sits in a trailer at the Ambassador Bridge for six hours in August heat. By the time products clear, they can be damaged, forcing costly returns, relabeling, and reshipment. The return, relabel, and re-ship cost more than the shipment was worth. That's not a rare event in July and August; it's the default risk for anyone involved in cross-border logistics between Canada and the US during peak summer season.
If you sell out of Canada and ship into the US, June through August is when the math changes most.
This guide covers the three key factors that impact Canada-to-US cross-border shipping in summer, namely, carrier selection, HS code classification, and duty minimization strategies. It answers critical questions like:
Read on for more insights.
The border doesn't slow down either for commercial freight or for tourist traffic. And most borders have the same crossings for tourists and freight. So when passenger volume spikes, it slows down commercial traffic processing.
Other vital reasons that affect summer logistics include:
As a result, seasonal inventory gets stranded at the border, with eCommerce brands incurring exorbitant storage fees and missing out on committed sales and delivery timelines.
They must proactively prefile declarations if goods are subject to other compliance requirements imposed by partnering government agencies, such as the FDA. Any omission in these documents will trigger an unpredictable delay due to a customs hold.
These reasons increase peak-season border wait time, ultimately affecting your delivery and sales timeline estimates and landed cost.
The mistake isn't that you are choosing ground freight because it is affordable and effective. The error occurs when retailers expect ground freight performance in July and August to be the same as in other months.
One question they overlook is whether a specific SKU can withstand peak-summer conditions. That's a decision that needs to be taken independently for every SKU, but most retailers never make the connection between routing and product quality in summer. For example, products such as cosmetics, supplements, chocolates, battery-powered electronics, and adhesives are highly susceptible to heat. Unless the required temperature for these heat-sensitive goods is maintained during both transit and storage, they might spoil or be damaged.
The financials involved in cross-border shipping are also affected by peak-summer border complexities. Logistical bottlenecks at the border invariably give rise to financial losses. Cross-border congestion is arguably one of the biggest factors that impacts financial metrics during peak international trade volumes. If the delay results in storage at the border, you will incur storage fees, elevating your landed cost. Additionally, the delay will also prevent you from keeping customer delivery commitments, resulting in loss of face. In a B2B shipment, such delays can result in missed sales.
It is evident that during peak seasons when shippers operate beyond their designed capacities, any delay at the Canada-US border creates a domino effect of delayed deliveries, unbudgeted costs, and margin erosion.
| Must Read: What Is Landed Cost and Why Every Cross-Border Seller Needs to Calculate It Before Pricing |
The increased volume is good news. The unplanned cost isn't. Building a summer shipping plan the way you'd build a Q4 plan by locking in service commitments, understanding surcharge windows in advance, knowing which service types have room and which don't, is the difference between a good July and a July that quietly eats your Q3 margin.
Paying for a faster ground service doesn't buy you a faster crossing. Expedited and standard ground freight cross the border in the same lane, at the same pace, behind the same wait.
What you're actually paying for with a premium service is:
That's a real benefit, but it is not the benefit most sellers think they're buying. This leads retailers to choose expensive air freight to solve a problem that was never about speed at all but about what a product does while it sits still.
Essentially, when selecting your carrier, factors such as tracking visibility, claims handling, temperature sensitivity, delivery guarantees, and customer experience become critical selection criteria. You must evaluate every carrier based on their speed of delivery and quoted cost and measure their expertise with these parameters.
Every shipping decision boils down to one question. What happens to this product if it sits in a hot place for a few hours? The answer is what defines summer carrier selection. How? Let’s see.
This is the default for many retailers because it is the affordable option. But "ground" also means the longer total dwell time. The dwell time refers to the time the shipment spends sitting still at a cross-border storage facility. It is this dwell time that turns heat exposure from a theoretical risk into a spoiled product. So when choosing the logistics and shipping partner, it is critical to verify their expertise in handling temperature-sensitive goods in transit and at the border and claims handling, in case of a delay.
You also need to check their alternate routing arrangement to address an unexpected delay that might hamper the customer experience.
These cut that dwell time down substantially, minimizing the product’s exposure to heat. If a product has a stated storage temperature on its own label, it doesn't belong in a slow-moving trailer in August. Confirm the specific handling and temperature commitments with your carrier before committing volume. They are worth verifying directly rather than assuming because those thresholds vary by provider and lane.
This makes eCommerce shipping slower and cheaper per unit. But it is built for volume rather than urgency and is the right call for palletized, non-perishable inventory moving in bulk.
| Service Type | Relative Speed | Best Fit This Season | Heat/Dwell Exposure |
| Ground | Standard, longest total transit | Non-perishable, low-risk SKUs | Highest, longest time in-network |
| Expedited ground | Faster network handling, same border wait | Time-sensitive or moderately heat-sensitive goods | Reduced, less dwell time overall |
| Air | Fastest overall | Heat- or damage-sensitive, high-value SKUs | Lowest, minimal time in transit |
| Consolidated freight | Slower, batch-based | Bulk, palletized, non-perishable restock | Moderate, depends on load consolidation timing |
So "what we always use" is never the right answer for summer carrier selection. The ideal answer varies by SKU and depends on each SKU's response to heat during peak summer months.
Peak season surcharges aren't only a November-December thing anymore. Carriers also apply seasonal and demand-based surcharges across service types during summer volume spikes, and the applied charges are not even.
For example, peak surcharges for ground networks vary by carrier, service, type, lane, and capacity conditions. Air freight and expedited services, already priced at a premium, sometimes see smaller proportional surcharge increases because they experience much lower congestion at customs than ground freight.
That means the cost gap between ground and expedited traffic narrows during peak weeks. Consequently, a seller selecting a carrier in April, based on April's price gap, may find that gap has narrowed substantially by August. This also means that the service they assumed was the budget option in April no longer remained so in August on this specific lane.
The sheer volumes of HS codes make it challenging to match the right one to the product. A warm-weather sales spike acts as a catalyst for errors because the sheer volume of products in summer makes it challenging for the involved people to slow down and double-check which one actually applies.
Duty is calculated as a percentage of the declared value, and applied to every unit and every shipment. But when sellers classify a product under the wrong HS code, sellers absorb a financial hit that erodes their profit margins because they keep paying the wrong duty till the mistake is detected.
This makes classification errors so much more expensive than they look. A carrier surcharge is a flat, visible line item. But entering a wrong HS code or an incorrect classification level results in a misclassification that scales with your best month. This means the season you're most excited about is the same season a bad HS code costs you the most.
Brands with frequently changing catalogs, complex products, or limited customs expertise often benefit from working with a customs broker. Since new SKUs, new materials, and new categories are added for summer, your HS risk profile changes the moment you experience a loss in bandwidth.
If your catalog is stable year-round and you're shipping the same handful of well-documented SKUs, you might not need a customs broker after the first year. This is because the classification work is largely already done, and the marginal risk of a new product category simply doesn't exist.
So the decision whether to hire a customs broker only gains relevance when your product mix actually changes between February and July. It also depends on how much confidence you have in your people who are aligning the HS codes.
Every Canada-US cross-border commercial shipment must undergo a duty calculation because of the elimination of the US de minimis rule. The only real question left is how much?
Two sellers ship an identical product at the same price to identical US customers. One customer pays exactly what they saw at checkout. The other is surprised when the delivery person asks for a duty payment they didn't know was coming. Same product, same price, completely different experience. This is what the DDP vs DAP debate is all about.
Here, the seller gets the goods to the destination, but the buyer is responsible for duty, taxes, and clearance fees at the border. That surprise bill at the door is a DAP shipment. A customer who didn't budget for it associates that unpleasant surprise with your brand, not with US trade policy.
Here, the seller prepays duties and fees, folding the cost into the price the customer has already agreed to. Nothing shows up at the door. It's a better experience for the buyer, and for a lot of DTC sellers competing on trust and reviews, that alone justifies the switch. But DDP also eats into your margin math from day one, and it requires the seller to have the customs relationships and documentation to actually prepay correctly.
DDP is best for brands selling premium goods to customers who expect a frictionless unboxing experience. A brand running on thin margins and price-sensitive customers might reasonably choose DAP. And he would be transparent about it upfront, and before checkout, rather than absorbing costs, it can't afford to eat.
With de minimis off the table, all sellers are looking at CUSMA as becoming the main tool left for reducing what gets paid at the border. But qualification for this rule is not automatic just because a product is made in Canada. It also depends on rules of origin and whether the manufacturing process meets the specific threshold for that product category. A Canadian-assembled product built mostly from imported components can fail to qualify even though it says "Made in Canada" on the box. So sellers have to get this right, yet most sellers skip this because it requires paperwork before the sale rather than paperwork after a customer complains. But it's also the one place that requires permanent upfront rate reduction rather than a one-time fix.
| A Quick Checklist for CUSMA Qualification • HS classification • Country of origin • Supplier documentation • Certification |
A correctly classified product with the wrong CUSMA determination still overpays. A correctly qualified product under the wrong HS code still overpays, just for a different reason.
So, the sequencing matters more than sellers expect. Fixing a classification or qualification error on a product that's already shipped a thousand units means:
Fixing the same error before volume ramps is a documentation exercise. The only variable is when someone caught it.
Not every duty overpayment is a classification problem. The ones given below are:
None of these are exotic mistakes. They're operational habits that worked fine when duty was optional for small shipments and stopped working the moment it wasn't.
We at eShipper take the summer peak season challenges very seriously and proactively work with our eCommerce clients to minimize the seasonal cross-border impact on transportation. A few ways by which we help address the challenges individually:
What’s the actual decision framework buried in all of this? Match the service to what the product can withstand, get the HS code right before volume ramps rather than after, and treat CUSMA qualification and your Incoterm choice as the two levers that still move landed cost now that every shipment crosses the dutiable line.
None of those are complicated decisions. They're just decisions most sellers only make once a year, in the spring, and then stop revisiting.
| Want to boost your summer-season peak cross-border profits? Connect with eShipper Now! |
Yes, consolidated freight is usually the cheapest per-unit option, and that doesn't change in summer. But if you are consolidating multiple customers' individual orders into one shipment to save on freight, that can shift how the shipment gets valued and duty-assessed at the border. This is similar to what a single parcel per customer wouldn't trigger.
These include:
• A commercial invoice with an accurate declared value
• A packing list
• A country-of-origin statement
• If claiming preferential tariff treatment, you need a CUSMA certificate of origin.
For freight shipments, the bill of lading makes for an additional attachment. The bill of materials or manufacturing documentation proves the HS code and CUSMA determination were correct, since that's what gets requested if a shipment is ever audited after the fact. Platforms that generate the invoice and BOL automatically at the time of shipping like eShipper, cut down on the inconsistency that creeps in when this paperwork gets typed out by hand during a volume spike.
CUSMA-compliant goods are still exempt from the broader tariff actions applied this year under IEEPA and Section 122. But it isn't universal.
Section 232 tariffs on steel, aluminum, and copper apply regardless of CUSMA compliance, and as of late July 2026, the US has moved to apply new tariffs that override the CUSMA exemption for those lines specifically. If your catalog includes exactly those categories, don't treat "CUSMA-qualifying" as a blanket answer this season.
Yes. Where duties genuinely do combine is across different regimes aimed at different things, like a country-specific tariff layered on top of the standard base rate. The practical takeaway for a Canadian seller: don't estimate landed cost as "CUSMA rate plus a flat percentage" and assume that's fixed.
