Canada Customs Duty: What Your Landed Cost Actually Includes

Key Takeaways

• Your duty liability is locked in by HS classification at the 8-digit CCN level—misclassify and you either overpay or trigger AMPS penalties.
• CUSMA and CETA preferential claims can drop your duty to 0%, but only if you hold valid origin certificates and declare them correctly on the CAD.
• The 90-day correction window under CARM lets you fix underpayments before CBSA flags them, but after that you’re looking at AMPS contraventions starting at CAD 400.
• Duty drawback claims give you a four-year window to recover paid duties on re-exports or destroyed goods, but the paperwork burden is real.

When a Canadian importer asks what their landed cost will be, the first variable that swings the number is canada customs duty. It’s not a flat tax. It’s not predictable across product categories. And if you’re filing your own CAD entries or relying on a broker who doesn’t review HS classifications, you’re either overpaying or setting yourself up for an AMPS notice six months later.

What Canada Customs Duty Actually Is

Canada customs duty is a tariff—a percentage charge applied to the customs value of imported goods based on their Harmonized System (HS) classification. CBSA publishes the rates in the Canadian Customs Tariff, which assigns a duty rate to every 8-digit Customs Commodity Number. The rate you pay depends on the product, the country of origin, and whether you’re claiming a preferential Free Trade Agreement rate like CUSMA or CETA.

Most importers see MFN (Most Favoured Nation) duty rates between 0% and 18%. Industrial machinery, raw materials, and some electronics enter duty-free or at low single digits. Apparel, footwear, and consumer goods often hit 16% to 18%. A few categories—dairy, poultry, textiles subject to tariff-rate quotas—can run into the 200% to 300% range, but those are the exceptions and usually trigger import permit requirements.

The customs value is not your supplier’s invoice price. It’s the transaction value adjusted for assists, royalties, commissions, freight to the Canadian port of entry, and any other additions required under Customs Act Section 48. If you’re working CIF terms, your ocean freight and insurance are already in the value base. If you’re working FOB, you add the international freight. Either way, duty applies to the landed number, not the factory gate price.

How CBSA Calculates Your Duty Liability

When we file a CAD (Commercial Accounting Declaration) through the CARM Client Portal, we declare the HS classification, the customs value, the origin, and the applicable duty rate. CBSA’s release system validates the classification against the Customs Tariff, applies the rate, calculates GST on the sum of value plus duty, and generates the total amount due.

If the goods qualify for CUSMA preferential treatment and we’ve declared the origin claim on the CAD, the duty rate drops to the CUSMA column—often 0% for goods that meet the Rules of Origin. If we don’t declare the claim at time of import, you pay MFN duty. You can apply for a refund later under Section 74, but that’s a four-year administrative claim process. It’s cleaner to get it right on the initial entry.

Misclassifying the HS code is the fastest way to either overpay or underpay. We see importers who’ve been filing the same product under the wrong CCN for two years, paying 6.5% duty when the correct rate is 0%, or paying 0% when the correct rate is 9.5%. CBSA doesn’t automatically refund the first case. In the second case, they issue an AMPS penalty for short-payment plus interest at the CRA prescribed rate, currently around 10% annually.

MFN vs. FTA Duty Rates: When CUSMA or CETA Saves You Money

The MFN duty rate is what you pay if the goods don’t qualify for preferential treatment under a Free Trade Agreement. For imports from the U.S., Mexico, the EU, or other FTA partner countries, the preferential rate can be significantly lower—usually 0%—but only if the goods meet the agreement’s Rules of Origin and you hold valid origin documentation.

Under CUSMA, a valid origin claim requires a CUSMA origin declaration from the producer or exporter. It can be a certification on the commercial invoice or a standalone document. The goods must meet the product-specific Rule of Origin in the CUSMA text—either a tariff classification shift, a regional value content threshold, or a combination of both. If the product doesn’t meet the rule, you pay MFN duty even if it’s made in the U.S.

CETA works the same way but with different Rules of Origin. EU-origin goods that qualify enter Canada at 0% duty, but the origin criteria are stricter than CUSMA for some categories. We file CETA claims with a CETA origin declaration and a valid EUR.1 or origin statement from the exporter. CBSA can verify these claims post-import, so the documentation has to be defensible.

We handle preferential origin claims as part of the CAD filing. If you’re importing from FTA countries and not claiming the preferential rate, you’re leaving money on the table every shipment.

Common Duty Mistakes That Trigger AMPS Penalties

The most expensive duty mistake is short-payment due to misclassification or undervaluation. Under CARM, you have 90 days from CAD acceptance to file a correction if you catch the error. After that, CBSA’s verification officers can flag the entry during a post-release audit, and you’re looking at an AMPS Level 1 infraction starting at CAD 400 for a first offense, plus the duty shortfall and interest.

Another common error: failing to add assists or royalties to the customs value. If your supplier invoices you for CAD 10,000 but you’ve supplied them with tooling worth CAD 2,000, that assist is part of the transaction value under Customs Act Section 48. If you don’t declare it, you’ve undervalued the shipment and underpaid the duty. CBSA catches these during origin or valuation verifications, often two or three years after import when you’ve lost track of the documentation.

Not declaring a CUSMA or CETA claim at time of import is also a mistake, but it’s a recoverable one. You can file a Section 74 refund application within four years of the final determination. We file these regularly for clients who’ve been paying MFN duty on U.S. or EU goods that qualified for preferential treatment all along. The refund comes back as a credit or cheque after CBSA reviews the origin documentation. It’s not fast—90 to 180 days is typical—but the money is real.

Duty Drawback and Refund Claims

If you import goods, pay canada customs duty, and then re-export them or destroy them under CBSA supervision, you can claim a duty drawback under the Customs Act Section 113. The claim window is four years from the date of importation. We file drawback claims for clients who import components, incorporate them into finished goods, and export the finished product. The duty paid on the imported components is refundable if the finished goods are exported within four years and you can document the usage.

Drawback claims require detailed records: the original CAD, proof of duty payment, commercial invoices for the re-export, and a reconciliation showing which imported goods went into which exported shipments. CBSA scrutinizes these claims. If the paperwork doesn’t tie out, they reject the application. We see rejection rates around 15% to 20% on first submission, usually because the importer didn’t track the imported components through their production system.

Section 74 refund claims (for overpaid duty due to misclassification or overvaluation) are simpler but still document-heavy. You need the original CAD, proof of payment, and evidence supporting the correct classification or value—technical specs, lab reports, supplier declarations, whatever proves your case. CBSA will request additional documentation if the initial filing doesn’t answer their questions. We handle the back-and-forth as part of our brokerage service.

When to Get Classification Help Before You Import

If you’re launching a new product line or importing a category you haven’t brought in before, don’t guess the HS code. A wrong classification at 0% duty when the correct rate is 9.5% will cost you AMPS penalties plus interest when CBSA catches it. A wrong classification at 9.5% when the correct rate is 0% costs you money every shipment until you fix it.

We run advance HS classification reviews before the first shipment. If the classification is unclear or the product sits on a boundary between two CCNs with different duty rates, we request an advance ruling from CBSA. The ruling is binding and gives you certainty before you commit to a supply agreement. It takes 120 days on average, but it’s the only way to lock in the correct duty rate before you start importing volume.

Most duty problems we see are avoidable. They happen because someone filed the CAD without reviewing the classification, the valuation, or the origin claim. CARM gives you 90 days to fix it. After that, you’re in AMPS territory. We file the CAD right the first time, and when errors do surface, we file the correction inside the window. Come say hello.

Frequently Asked Questions

What is the MFN duty rate range for goods imported into Canada?

MFN (Most Favoured Nation) duty rates under the Canadian Customs Tariff run from 0% to 35% depending on the HS classification. Apparel and footwear often sit at 16% to 18%, while industrial machinery might enter duty-free or at 2.5% to 6.5%. The Customs Tariff itself is the legal schedule published by CBSA.

How long do I have to correct a duty error under CARM?

You have 90 days from the original CAD acceptance to file a correction if you underpaid duties or GST. After that window closes, CBSA treats the shortfall as a potential AMPS contravention. The correction is filed through the CARM Client Portal as an amended CAD.

Can I claim a refund on overpaid import duties?

Yes. Section 74 of the Customs Act gives you four years from the date of final determination to apply for a refund of overpaid duties. We file these as duty adjustment requests with supporting documentation showing the correct classification or valuation. Approval timelines run 90 to 180 days depending on CBSA workload.

What AMPS penalties apply if I short-pay my duty?

AMPS (Administrative Monetary Penalty System) penalties for duty contraventions start at CAD 400 for a first Level 1 infraction and scale up to CAD 25,000 for repeat or Level 5 infractions, per the AMPS Master Penalty Document. Interest on unpaid duties accrues daily at the prescribed CRA rate, currently around 10% annually.

Does CUSMA eliminate all duty on U.S. imports?

No. CUSMA preferential duty applies only if the goods meet the Rules of Origin in the agreement and you hold a valid CUSMA origin declaration. A product might have 8% MFN duty but qualify for 0% under CUSMA if it meets regional value content or tariff-shift criteria. You declare the claim on the CAD at time of import.

How does canada customs duty differ from GST?

Duty is a tariff assessed on the customs value of the goods based on their HS classification. GST is a 5% tax applied to the total of customs value plus duty plus excise where applicable. Both are collected by CBSA at the border, but duty rates vary by product while GST is flat.

When do I actually pay the duty to CBSA?

Under CARM Release Prior to Payment, you post a financial security bond with CBSA and settle your monthly duty and GST balance by the payment deadline shown on your K84 statement. If you’re not enrolled in RPP, payment is due before release of the goods.

What records does CBSA require me to keep for duty purposes?

You must retain all commercial invoices, origin certificates, CAD filings, and supporting valuation or classification documents for six years from the date of importation under the Customs Act. CBSA verification officers will request these during origin or valuation audits.