If you're buying goods from overseas and landing them in Canada, someone has to tell the Canada Border Services Agency what's in the shipment, what it's worth, where it's from, and how much duty you owe. That someone is usually a customs broker. The question "customs broker what is" comes up the moment an importer realizes their freight forwarder won't automatically handle CBSA clearance, or when a first shipment sits stuck at the border because no one filed the paperwork.
Customs Broker What Is: The Legal Role
A customs broker is a person or company licensed by the CBSA under section 32 of the Customs Act to transact business on behalf of importers. In practice, that means we prepare and file the Form B3 Canada Customs Coding Form, the document that declares your goods, classifies them under the correct Harmonized System code, applies the appropriate tariff treatment, and calculates duties and GST. We also file the cargo control document amendments, respond to CBSA examinations, and post security bonds when required.
You can act as your own broker if you have a business number and register with the CBSA, but most mid-market importers don't. The regulatory burden is real: tariff classification requires understanding the 98 chapters of the Customs Tariff, valuation rules in Memorandum D13-3-1, rules of origin for every free trade agreement Canada has signed, and a working knowledge of prohibited and controlled goods across twenty-odd government departments. We see importers try it once, get hit with a penalty for misclassification, and call us the same week.
What a Broker Actually Does on Every Shipment
When your container arrives at the Port of Montreal or your air shipment lands at Pearson, the carrier sends us the cargo control document. We review the commercial invoice and packing list you've sent, classify each line item, determine country of origin, apply the correct tariff treatment (MFN, CUSMA, CPTPP, etc.), and calculate the duties and taxes. We submit the B3 electronically through the CBSA Assessment and Revenue Management system—CARM, as of May 2024—and pay the amount owing from the financial security you've posted in your CARM Client Portal account.
If CBSA flags the shipment for examination, we coordinate the inspection, provide additional documentation, and resolve any discrepancies. If the classification is complex or the origin claim needs a ruling, we request an advance ruling or origin verification before the goods arrive. For regulated products—food, medical devices, vehicles, textiles under AMPS—we obtain the permits and file the companion forms (Form B2 for warehouse entries, B2G for in-bond movements, B15 for casual refunds when you overpay).
Timeline: a routine air shipment clears in two to six hours if the paperwork is clean. Ocean freight takes longer because of dray appointments and terminal congestion, not CBSA processing. Examinations add one to three days. Missing documents or incorrect HS codes can hold a shipment for a week or more.
Cost: What You Pay and Why
Most brokers charge per entry, not per hour. For a straightforward commercial B3 with one or two line items, fees typically run between seventy and one hundred fifty dollars. Shipments with ten or more tariff lines, multiple countries of origin, or regulatory permits cost more—two hundred to four hundred dollars is common. If you're importing weekly, many brokers offer monthly retainers that average out to fifty or sixty dollars per entry.
You'll also see disbursement fees for things like courier charges to deliver original documents, bond premiums if you don't have continuous security posted, and after-hours service if you need weekend release. We include CARM transaction costs in our fee structure now; some brokers bill separately.
Duties and taxes are separate. Those amounts go to the CBSA, not to us. On a ten-thousand-dollar shipment of electronics from China, you might pay six percent MFN duty plus five percent GST—around eleven hundred dollars to the government, one hundred twenty to the broker.
When You Need a Broker vs. When You Don't
You're legally required to file a B3 for every commercial import, but you're not required to hire a broker if you hold your own business number and CARM account. We generally tell importers: if you're bringing in one or two shipments a year of the same product from the same country, and you have time to learn the system, do it yourself. If you're importing monthly, dealing with multiple suppliers, or handling anything subject to trade remedies or regulations, the cost of mistakes outweighs the brokerage fee.
Mistakes are expensive. Misclassification can trigger retroactive duty assessments going back four years under CBSA's Formal Correction process, plus penalties that start at five hundred dollars and scale up. Claiming CUSMA origin without proper certification can void your duty savings and add administrative monetary penalties. We've seen assessments in the thirty- to eighty-thousand-dollar range for importers who self-filed and got the tariff treatment wrong.
How Brokerage Fits with Freight Forwarding and Compliance
Customs brokerage is one piece of the import chain. Freight forwarding handles the physical movement—booking the carrier, arranging pickup, managing the ocean or air leg—and often overlaps with brokerage at the destination. At CanFlow, we do both under one roof because coordination matters: if the freight team knows the shipment is subject to CBSA examination, they can plan dray timing accordingly. If the broker knows the shipper missed a permit deadline, we can arrange in-bond movement to a sufferance warehouse while the paperwork catches up.
Compliance is the third leg. That's tariff classification reviews, CBSA audit support, duty drawback claims, and origin certification programs. If you're importing fifty shipments a year and no one has done a classification audit, you're either overpaying duty or you're sitting on unquantified risk. Our compliance services exist to quantify that risk before CBSA does.
For importers paying significant duties—twenty thousand or more per year—it's worth running the numbers on tariff engineering, foreign trade zone options, and drawback. We handle duty drawback and refund claims routinely; the B15 process is straightforward if you have the documentation, and we've recovered amounts ranging from twelve hundred to forty thousand dollars for clients who overpaid or re-exported goods.
Working with a Broker: What to Expect
You'll provide a commercial invoice, packing list, and any certificates of origin or regulatory permits before the shipment arrives. We'll ask questions—"Is this for resale or internal use?" "Has the supplier certified CUSMA origin?" "Do you have a CARM account set up?"—and set up your file in our system. First-time importers need a business number, a CARM Client Portal account with posted financial security, and sometimes a bond if you're importing controlled goods.
We file the B3, release the goods, and send you the entry summary with the accounting details. You'll receive the CBSA statement of account monthly through CARM, and you'll reconcile it against our invoices. Most of our clients check in quarterly to review classification and make sure nothing has drifted.
If CBSA audits you—and they do, particularly for importers in the two-hundred-thousand to two-million-dollar duty range—we're your first call. We pull the entry history, organize the documentation, and represent you through the verification. That's part of the service.
Next Steps
If you're importing into Canada and need someone to handle the CBSA filings, or if you're doing it yourself and want a second opinion on classification or CARM setup, we're happy to talk through your specific situation. No obligation, no sales pitch—just a conversation about what your shipments actually need. Reach out through our contact page and we'll get back to you within one business day.
Originally published at https://www.canflow-global.com/en/insights/customs-broker-what-is-a-canadian-importers-working-definition/.
