Importing from the USA to Canada: CUSMA Guide

The United States is Canada’s largest trading partner by a wide margin. Hundreds of billions of dollars in goods cross the Canada-US border every year, making it the most active bilateral trade corridor in the world. For Canadian businesses, importing from the US is often the simplest and fastest cross-border trade relationship — but it still comes with customs obligations, regulatory requirements, and financial security needs that you cannot ignore.

This guide covers how to import goods from the United States to Canada, with a focus on the CUSMA trade agreement, duty-free provisions, rules of origin, and why you still need a customs bond even when duties are zero.

CUSMA: The Framework for Canada-US Trade

The Canada-United States-Mexico Agreement (CUSMA) is the trade agreement that governs preferential trade between Canada, the US, and Mexico. It entered into force on July 1, 2020, replacing the North American Free Trade Agreement (NAFTA), which had been in effect since 1994.

CUSMA provides preferential tariff treatment — often 0% duty — for goods that qualify as originating in North America. This is the agreement’s primary benefit for importers: if your goods meet the rules of origin, you pay little or no customs duty.

Key facts about CUSMA:

• Covers trade between Canada, the United States, and Mexico
• Replaced NAFTA on July 1, 2020
• Provides preferential (often zero) duty rates for qualifying goods
• Requires goods to meet specific rules of origin to qualify
• A certification of origin must be in the importer’s possession to claim preferential treatment (provided to CBSA on request)
• CUSMA includes a joint review clause (Article 34.7) — the first review in 2026 determines whether to confirm the Agreement for a new 16-year term

CUSMA does not eliminate all trade barriers. Certain sectors — notably dairy, poultry, and eggs — remain subject to supply management tariff-rate quotas. And goods that do not meet the rules of origin are assessed at Canada’s standard MFN (Most Favoured Nation) duty rates, just as if they came from a country with no trade agreement.

Rules of Origin: When Goods Qualify for Duty-Free Treatment

The rules of origin under CUSMA determine whether a product qualifies for preferential tariff treatment. Simply being shipped from the United States is not enough — the goods must actually originate in North America as defined by the agreement.

What “Originating” Means

A product is considered originating under CUSMA if it meets one of these criteria:

• Wholly obtained or produced in one or more CUSMA countries — for example, agricultural products grown in the US, minerals mined in Canada, or fish caught in Mexican waters
• Produced entirely from originating materials — all inputs and components are themselves from CUSMA countries
• Meets a product-specific rule of origin — the product undergoes sufficient processing or transformation in a CUSMA country to qualify, even if some inputs come from outside North America

Product-specific rules are detailed in CUSMA’s Annex 4-B and vary by tariff classification. They typically require one or more of:

• A tariff shift — the finished product is classified under a different HS heading than its non-originating inputs
• A regional value content (RVC) threshold — a minimum percentage (often 50-75%) of the product’s value must originate in North America
• A specific processing requirement — the product must undergo certain manufacturing steps within CUSMA countries

Why Rules of Origin Matter for Your Business

If your US supplier sources components from China, assembles them in the United States, and ships the finished product to you in Canada, that product may or may not qualify for CUSMA preferential rates depending on how much value was added in the US and whether the assembly constitutes a qualifying tariff shift.

Getting this wrong has real consequences:

• Claiming CUSMA when goods do not qualify can result in CBSA penalties, duty reassessments, and interest charges
• Failing to claim CUSMA when goods do qualify means you overpay duties unnecessarily

Work with your customs broker to verify origin status before claiming preferential treatment.

Certification of Origin

To claim CUSMA preferential duty rates, you need a certification of origin — a declaration that the goods meet the agreement’s rules of origin.

Under CUSMA, the certification of origin requirements are more flexible than they were under NAFTA:

• No prescribed form. CUSMA does not require a specific government-issued form. The certification can appear on a commercial invoice, a letter, or any other commercial document — as long as it contains the minimum required data elements.
• Can be made by the exporter, producer, or importer. Under NAFTA, only the exporter could certify origin. Under CUSMA, the importer can also self-certify.
• Must include specific data elements. The certification must contain: certifier information, exporter information (if different), producer information (if known), description of goods, HS classification, origin criteria, and the period the certification covers (up to 12 months for multiple shipments of identical goods).

Keep your certifications on file. CBSA can request proof of origin for up to five years after the date of importation. The importer must have the certification of origin in their possession at the time the preferential tariff claim is made. If you claimed preferential treatment and cannot produce a valid certification of origin when asked, CBSA will reassess duties at the full MFN rate plus interest.

De Minimis Thresholds

CUSMA includes a de minimis provision that allows goods to qualify for preferential treatment even if they contain a small amount of non-originating materials.

Under the de minimis rule:

• Goods can contain up to 10% by value of non-originating materials and still qualify for CUSMA treatment (for most products)
• For textiles and apparel, the threshold is 10% by weight of the fibre or yarn component

This provision provides some flexibility, but it is not a loophole. If a substantial portion of your product’s value or content comes from outside North America, de minimis will not save you. Work with your customs broker to assess whether your goods clear the threshold.

GST and Provincial Taxes: You Always Pay

Even when CUSMA eliminates customs duties entirely, you still owe taxes on imports from the United States.

GST (Goods and Services Tax) of 5% applies to virtually all commercial imports into Canada. It is assessed on the total of:

• The value of the goods (transaction value)
• Plus any customs duty (even if zero, the calculation base remains)
• Plus shipping and insurance costs to the point of import

GST/HST at import is calculated on the value for duty plus any duties and excise taxes. The provincial component of HST is generally not collected on importation of commercial goods destined for participating provinces — importers may need to self-assess the provincial portion separately. Importers in non-participating provinces may owe provincial sales tax through a separate provincial mechanism.

This is why you still need financial security under CARM even for duty-free US imports. Your GST obligations create a financial security requirement with CBSA. Without a customs bond or cash deposit, you cannot obtain Release Prior to Payment privileges — and your goods sit at the border until you pay GST and any applicable duties in cash.

Why You Still Need a Customs Bond

Many importers assume that because their US goods enter duty-free under CUSMA, they do not need a customs bond. This is incorrect.

Reason 1: GST is always owed. Even at 0% duty, the 5% GST on every import creates a financial obligation to CBSA. Your financial security requirement is calculated on total duties and taxes — including GST.

Reason 2: Not all goods qualify for CUSMA. If you import a mix of products — some qualifying for preferential treatment and some not — you will owe MFN duties on the non-qualifying items. A single non-qualifying shipment can create a significant duty assessment.

Reason 3: RPP keeps your supply chain moving. Release Prior to Payment allows your goods to clear customs immediately and be released to you. Without RPP, CBSA holds every shipment until you pay the full assessed amount. For businesses importing regularly from the US, even a few hours of delay per shipment adds up to real cost.

Reason 4: CARM requires it for RPP. Under CARM, importers must post their own financial security to obtain or keep Release Prior to Payment (RPP) privileges. Without RPP, you can still import — but every shipment must be paid in full before release, which is operationally far worse. Your customs broker cannot post security on your behalf.

A customs bond from Bondrail satisfies the CARM financial security requirement at 50% of your total duties and taxes — even if the majority of that amount is GST rather than customs duty. Join the waitlist and have your bond issued in as little as one business day.

Cross-Border Logistics

Importing from the US to Canada is logistically simpler than most other trade routes, but there are still operational details to manage.

Transportation Modes

• Truck — the dominant mode for Canada-US trade. Fast, flexible, and suitable for most commercial shipments. Major border crossings include Windsor-Detroit, Fort Erie-Buffalo, Lacolle-Champlain, and Pacific Highway (Surrey-Blaine).
• Rail — used for bulk commodities, heavy goods, and large volumes. CN and CP rail networks connect major US and Canadian industrial centres.
• Air freight — for time-sensitive, high-value, or lightweight shipments. Major cargo airports include Toronto Pearson, Vancouver International, and Montreal Trudeau.
• Ocean/lake freight — used for specific routes, particularly through Great Lakes ports.

Transit Times

• Truck from US border to Canadian destination — typically same-day to 2 days, depending on distance and customs clearance
• Rail — 3-7 days depending on origin and destination
• Air freight — 1-2 days including customs clearance

Customs Clearance at the Border

For truck shipments, customs clearance happens at the border crossing. If your documentation is in order and you have active RPP, clearance can be processed in hours — sometimes while the truck is still in transit, if your broker files electronically in advance using the Pre-Arrival Review System (PARS).

Delays at the border are most commonly caused by:

• Missing or incorrect documentation
• No financial security on file (no RPP)
• Random CBSA inspections
• Goods subject to additional regulatory requirements (CFIA, Health Canada)

Documentation for US Imports

For a standard commercial import from the US, you will need:

• Commercial invoice — showing goods description, value, origin, terms of sale
• Bill of Lading or freight bill — from the carrier
• Packing list — detailing contents
• CUSMA certification of origin — if claiming preferential duty treatment (can appear on the invoice or a separate document)
• Commercial Accounting Declaration (CAD) — the accounting document filed through the CARM portal (replaced the former B3 form on October 21, 2024)
• Cargo Control Document — for tracking goods through the border process

For regulated goods, you may also need CFIA certificates, Health Canada authorizations, or other agency-specific permits.

Sectors with Special Rules

Automotive

CUSMA significantly tightened rules of origin for automobiles and auto parts. Vehicles must meet a 75% regional value content requirement (up from 62.5% under NAFTA) to qualify for duty-free treatment. There are also specific requirements for core parts, steel and aluminum content, and labour value content.

If you import vehicles or auto parts from the US, work closely with your customs broker to verify compliance with CUSMA’s automotive rules.

Dairy, Poultry, and Eggs

Canada maintains supply management systems for dairy, poultry, and eggs. CUSMA provides limited market access through tariff-rate quotas (TRQs) — a set volume of imports at preferential rates, with prohibitively high over-quota tariffs (often 200%+). Access to these quotas is allocated by Global Affairs Canada.

Textiles and Apparel

CUSMA has specific rules for textiles and apparel, including yarn-forward and fabric-forward rules that require qualifying goods to be made from North American yarn or fabric. There is also a tariff preference level that allows limited quantities of non-originating textiles to enter duty-free.

Steel and Aluminum

Steel and aluminum imports may be subject to additional considerations beyond standard duty rates, including safeguard measures and country-specific tariffs that can change based on trade policy decisions. Monitor CBSA and Global Affairs Canada announcements for current measures.

Common Mistakes When Importing from the US

Assuming CUSMA always means zero duty. It does not. Goods must meet rules of origin, and you must have a valid certification of origin. Without a valid certification of origin in your possession, you cannot claim CUSMA preferential rates and MFN rates will be assessed. Note: retroactive claims may be filed within the timeframe permitted under CUSMA Article 5.12.

Forgetting about GST. Even at 0% duty, you owe 5% GST on every commercial import. This creates a financial security obligation under CARM.

Not getting a customs bond. Your customs broker’s bond no longer covers you under CARM. Without your own bond, you lose RPP and every shipment is held until you pay in full.

Incorrect origin claims. If your US supplier uses non-North American components, the finished product may not qualify for CUSMA. Claiming preferential treatment on non-qualifying goods can result in penalties and reassessments.

Not keeping records. CBSA can audit your import transactions for up to five years. Keep all invoices, certifications of origin, and customs documentation organized and accessible.

Get Your Customs Bond

Even if most of your US imports enter Canada duty-free under CUSMA, you need a customs bond to maintain Release Prior to Payment privileges under CARM. Your GST obligations alone create a financial security requirement.

Bondrail makes it simple:

• Join the waitlist at bondrail.ca/get-a-quote
• Fast approval — most bonds issued within one business day
• Electronic registration — we post your bond directly in the CARM system
• Annual review management — we handle adjustments when CBSA recalculates your required amount

For more on how financial security works under CARM, see our CARM financial security guide. For a complete overview of the import process, read our guide to importing goods into Canada.

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Importing from the US and need a customs bond? Join the Bondrail waitlist — your goods should not sit at the border over a missing bond.