Peak Season Shipping Checklist for Canadian DTC Brands

If you run a Canadian DTC brand, peak season is not November anymore. It starts in October, when carrier surcharges kick in and capacity gets tight. Brands that wait until Black Friday to fix their shipping setup are already paying more and shipping slower than the ones who prepped in September.

Here's the checklist we run with our GTA and Quebec shippers before the volume wave hits.

Why October Is the New Start of Peak

For years, "peak" meant late November through December. That has shifted. UPS and FedEx now add peak surcharges (extra fees on top of your normal rate) as early as mid-October, and they keep them on into January. Canada Post also sees volume climb well before Black Friday.

Then there's what happened in 2024. The Canada Post strike froze parcels across the country during the busiest weeks of the year. Brands that only shipped with one carrier watched orders sit. Brands with a backup carrier kept shipping.

The lesson is simple. One carrier and crossed fingers is not a peak plan. You need a real one, and you need it before October.

Step 1: Confirm Your Carrier Capacity in Writing

Call your carrier rep. Ask two questions:

• What daily parcel volume have you booked me in for during peak?
• What happens if I go over that number?

Carriers plan their trucks and sort centres based on what they think you'll ship. If you told them 800 parcels a day back in July but you're now forecasting 1,500 for December, they need to know now. If you wait, your extra parcels sit on your dock.

Get the answer in an email. Not a phone call. Email.

Step 2: Line Up a Backup Carrier Before You Need One

A backup carrier is like a spare tire. You hope you don't use it, but the day you need it, you really need it.

For most Canadian DTC brands shipping from the GTA or Quebec, a good backup mix looks something like this:

Two things to check on the backup:

1. Onboarding lead time. Some carriers take weeks to set up an account, print labels, and connect to your platform. Do this in September, not November.
2. Service level promises (SLA). An SLA is the carrier's promise on delivery speed. Ask what happens when they miss it during peak. Most quietly waive their guarantees in December. Know that before you promise your customer two-day shipping.

Step 3: Audit Your Dim Weight and Packaging

Dim weight (short for dimensional weight) is how carriers charge you for boxes that are big but light. A pillow in a huge box costs more to ship than a book in a small one, even if the pillow weighs less. Carriers charge on whichever is higher, actual weight or dim weight.

Before peak, do this:

• Pull your last 100 shipments. Look at the billed weight versus the actual weight.
• If the billed weight is higher on most of them, your boxes are too big for what's inside.
• Test smaller box sizes or poly mailers (soft plastic envelopes) for products that don't need a box.

Every extra inch on a box costs you more per parcel in December than it does in July, because peak surcharges often stack on top of dim charges.

Step 4: Reset Your Free Shipping Threshold

Your average order value (AOV) usually goes up in Q4. People buy gifts. They add extras. If your free shipping threshold has been $75 all year, and your Q4 AOV climbs to $110, you're giving away shipping on orders that could easily cover it.

Look at last year's Q4 orders. Find the AOV. Then set your threshold just below it, close enough that customers add one more item to hit it. That one extra item often pays for the shipping and then some.

Step 5: Stress-Test Your TMS Automation

Your TMS (transportation management system, the software that picks a carrier and prints the label) needs to handle the volume without a human clicking every order.

Check these rules before October:

• Carrier selection rules. If Carrier A is delayed or capped, does the system auto-route to Carrier B? Or does it stall and wait for someone to notice?
• Zone-based routing. Shipping from Toronto to Montreal should not go the same way as Toronto to Vancouver. Make sure your rules match your carrier strengths by region.
• Address validation. Bad addresses in December become returns in January. Turn on validation at checkout, not at the label stage.
• Alerts. Set an alert for when a carrier's daily volume hits your cap. You want to know at 11 a.m., not at 4 p.m. when the truck is loading.

If your current setup needs someone to babysit re-routing every day, you'll lose that person's time exactly when you need them on customer service.

Step 6: Write the "Something Broke" Playbook

Ask yourself: if Carrier X goes down on December 10, what do we do in the next hour?

Write it out. Who calls the backup carrier. Who updates the shipping page on the website. Who emails customers with orders already picked. Who pauses paid ads on regions we can't ship to.

You probably won't need it. But if you do, you'll be glad it isn't the first time you're thinking about it.

Quick Takeaways

• Peak now runs October through January, not just late November.
• Get carrier capacity commitments in writing before October.
• Onboard a backup carrier in September, even if you never switch to it.
• Audit dim weight and packaging now, because peak surcharges stack.
• Reset your free shipping threshold to match your Q4 AOV.
• Make sure your TMS auto-routes without manual clicks.
• Write a one-page playbook for when something breaks.

This is the work we do with GTA and Quebec DTC brands inside our TMS — carrier mix, auto-routing rules, and a backup plan that actually kicks in when it needs to. If your current setup is one carrier and crossed fingers, September is the month to fix it.