What U.S. tariff refund fights mean for Canadian importers claiming drawback

Key Takeaways

• U.S. refund uncertainty does not pause Canada’s four-year drawback window under subsection 113(3) of the Customs Act, so file early if you re-export or destroy goods.
• If you import U.S.-origin components under CUSMA preference and your supplier faces margin pressure from Section 301 appeals, revalidate origin documentation before the next CBSA verification.
• CARM Client Portal duty adjustments require clean audit trails; retroactive preference claims that rely on supplier statements need contemporaneous certificates, not post-facto affidavits.
• Drawback claims filed today will be assessed against the duty paid on the original CAD, so confirm your HS classification and applied rate before you ship the goods back out.

Why a U.S. appeal matters on this side of the border

The U.S. Department of Justice is appealing court orders that directed Customs and Border Protection to refund Section 301 tariffs collected on Chinese goods between 2018 and 2020. Importers south of the border who won those refunds now face the possibility that Treasury will claw the money back, or at least tie it up in appeals for another eighteen months.

Canada does not impose Section 301 duties, so the litigation itself has no direct effect on your Commercial Accounting Declaration or the duty you pay CBSA. But if you import U.S.-manufactured goods that incorporate Chinese components, or if you re-export U.S.-origin inventory and file drawback claims under subsection 113(3) of the Customs Act, the uncertainty around your supplier’s cost base can show up in two places: the transaction value you declare when goods enter Canada, and the origin documentation you rely on when you claim CUSMA preference.

We have seen three scenarios in the past six months where U.S. tariff volatility forced mid-year corrections on the Canadian side.

Scenario one: transaction value shifts when your supplier’s duty burden changes

CBSA assesses duty on the transaction value of imported goods, adjusted for freight, insurance, and certain assists. If your U.S. supplier has been absorbing Section 301 costs and suddenly faces a refund clawback or a margin squeeze, their invoice price to you may rise. That higher price becomes your new customs value on the next CAD you file.

The regulation is straightforward: CBSA valuation rules require that you declare the price actually paid or payable. If that price changes because your supplier’s duty picture changed, you update your declaration. The trap is assuming that because Canadian duty rates have not moved, your CAD can stay static. It cannot. A $10,000 invoice that becomes a $10,800 invoice after your supplier stops eating U.S. duties will yield a higher MFN or CUSMA dutiable value, even if the HS classification and the tariff treatment stay the same.

We routinely adjust client CAD templates twice a year when supplier pricing resets. If your ERP pulls last quarter’s unit cost into this quarter’s customs declaration, flag it now.

Scenario two: CUSMA origin certificates that looked safe six months ago may not be safe today

CUSMA preference requires that goods meet regional-value-content or tariff-shift rules, and that the importer hold a valid certificate of origin. If your U.S. supplier certified origin in 2023 based on a production-cost model that assumed they would recover Section 301 duties, and that recovery is now in doubt, their RVC calculation may have been wrong.

CBSA does not care whether your supplier’s accountant made an honest mistake. If CBSA runs a CUSMA origin verification and discovers that the RVC fell below the treaty threshold because the supplier’s non-originating material costs were higher than declared, you lose the preference and you pay the MFN duty rate retroactively, plus interest. Depending on the circumstances, AMPS penalties under contravention code 9195 (incorrect origin claim) can add another layer.

The four-year audit window under paragraph 42(1)(a) of the Customs Act means CBSA can go back to 2020 shipments. If your supplier is one of the importers caught in the DOJ appeal, ask them to revalidate the certificates they issued you. Do it before CBSA does.

Scenario three: drawback claims that assume stable duty rates on re-export

If you import goods duty-paid, then re-export them or destroy them under supervision, subsection 113(3) of the Customs Act allows you to recover 99 percent of the duties within four years. The refund is calculated against the duty you actually paid on the original CAD.

The problem: if you imported under CUSMA preference (zero duty or reduced rate) and later discover that the preference was invalid, CBSA will demand the unpaid MFN duty before they process your drawback claim. You cannot draw back duty you never paid. If the correction and the drawback claim cross paths in the CARM Client Portal, you may find yourself in the odd position of writing CBSA a cheque for the duty shortfall on goods that left Canada six months ago, just so you can claim a refund on a different line item.

We have worked three of these cases in the past year. All three involved U.S.-origin automotive parts that were re-exported to Mexico. The importer filed the CAD under CUSMA, paid zero duty, then filed drawback (expecting a nominal processing-fee recovery). CBSA opened a verification, determined that the parts did not meet the CUSMA steel-melted rule, reclassified the entry to MFN 6.1 percent, and billed the importer for the shortfall. The drawback claim was approved only after the MFN duty was paid in full.

The lesson: clean up your origin documentation and your HS classification before you file for drawback, not after. D-memorandum D7-4-2 lists the documentation requirements; the Form B109 process has not yet migrated into CARM as of Release 3 in 2024, so you are still dealing with a paper-based audit trail.

What to check if you have exposure

If you import U.S.-origin goods or you file drawback claims on re-exports, run these three checks:

• Pull the last twelve months of CADs where you claimed CUSMA preference and confirm that your supplier’s certificate of origin was issued contemporaneously with the shipment. If the certificate is dated after the import, CBSA will reject it during a verification.
• Compare your supplier’s invoices from Q4 2023 and Q1 2024. If unit prices moved more than normal inflation would explain, ask whether Section 301 refund uncertainty or other duty changes drove the delta. Update your customs-value templates accordingly.
• If you have filed or plan to file drawback under subsection 113(3), confirm that the duty rate you paid on the original CAD matches the rate CBSA would assess today under the same HS classification and origin claim. If you later discover a misclassification or an invalid preference, you will pay the shortfall before you see the refund.

Our compliance team pulls certificate-of-origin audits twice a year for clients who import under CUSMA and CETA. The cost of the audit is a fraction of the cost of an AMPS penalty plus retroactive duty. If you have not reviewed your certificates since CARM went live, this is a good quarter to do it.

The four-year window does not pause for appeals

U.S. importers waiting for the DOJ appeal to resolve may have the luxury of sitting tight while Treasury and the courts argue. Canadian importers do not. The four-year limitation period under subsection 113(3) runs from the date you paid duty, not the date your supplier’s cost base stabilized. If you imported goods in 2021 and you plan to claim drawback, your deadline is 2025 regardless of what happens in Washington.

We have seen importers lose five-figure refunds because they assumed CBSA would grant an extension while a related U.S. case played out. CBSA did not. The Act gives the Minister discretion to waive time limits under subsection 113(5), but the threshold is high: you need to show that the delay was beyond your control and that you acted diligently once you became aware of your entitlement. “My supplier’s U.S. lawyer said to wait” does not meet that standard.

If you have goods sitting in a bonded warehouse in Montreal awaiting re-export, and you paid duty on the inbound leg, file the B109 now. Do not wait for clarity on the U.S. side.

When Washington’s noise becomes Ottawa’s audit

The DOJ appeal will take months to resolve, and even if Treasury wins, the fallout will ripple through supplier pricing and origin calculations for at least another year. CBSA does not pause verifications or AMPS assessments while U.S. litigation proceeds. If your CAD declarations rely on certificates issued by U.S. suppliers, treat this quarter as an opportunity to revalidate everything before CBSA does it for you.

We file CADs under CUSMA preference every day, and we run origin audits for clients who want to stay ahead of verification risk. If your supplier is caught in the Section 301 refund fight, or if you have drawback exposure on goods you imported in 2021 or 2022, get in touch. The four-year clock does not stop for appeals.

Frequently Asked Questions

How long do I have to file a drawback claim with CBSA?

Under subsection 113(3) of the Customs Act, you have four years from the date duties were paid to file a drawback claim if goods are exported or destroyed. The clock starts when CBSA receives payment, not when you file the CAD.

Can I claim CUSMA origin retroactively if my U.S. supplier only just qualified under the new steel-melted rules?

Yes, but you need a valid certificate of origin covering the shipment date and contemporary production records. CBSA will not accept a certificate backdated six months without proof the goods met the regional-value-content test at the time of import. D-memorandum D11-4-2 sets the documentation standard.

What happens if CBSA questions the duty rate I paid when I later file for drawback?

CBSA assesses drawback against the duty you actually paid on the original CAD, but if they discover a misclassification or an undeclared SIMA margin during the drawback review, they can issue an AMPS penalty and a demand for the shortfall. The refund and the correction run on parallel tracks.

Does U.S. Section 301 tariff litigation affect my Canadian import duty?

Not directly. Canada does not impose Section 301 duties. But if your U.S. supplier absorbs 301 costs and later loses a refund appeal, their pricing may shift, and that can change the transaction value you declare on your next CAD under CBSA valuation rules.

Can I use the CARM Client Portal to file a drawback claim?

Not yet. As of Release 3 in 2024, drawback claims still follow the paper-based Form B109 process described in D7-4-2. CBSA has signaled future CARM integration but has not published a timeline.

If I destroy goods instead of re-exporting them, do I still qualify for drawback?

Yes, provided you give CBSA advance notice and allow an officer to witness the destruction or accept alternative proof. The refund is typically 99 percent of the duty paid; CBSA retains 1 percent as an administrative fee.

Source: Supply Chain Dive