Duty Drawback Under CUSMA: Canada's 4-Year Refund Window vs. US Drawback Under 19 CFR 190

Two customs agencies, two clocks, and one rule that caps what you can recover when goods cross the US-Canada border more than once. That's the short version of duty drawback (a refund of duties paid on imported goods that are later exported, destroyed, or used to make an exported product) once CUSMA (the Canada-United States-Mexico Agreement, also called USMCA) enters the picture.

What Duty Drawback Is and Why It Matters

The underlying concept: import → re-export → recover duty

At its core, drawback follows one pattern: you import goods and pay duty, then you export those goods, use them to make something that gets exported, or destroy them under customs supervision, and you file a claim to get some or all of that duty back. It's one of the oldest trade programs in the United States, dating to 1789, and Canada runs a parallel version through the Canada Border Services Agency (CBSA).

Governments generally don't want to tax goods that never entered domestic commerce, so both countries built a refund mechanism for exactly that situation.

Industries that use it most (textiles, electronics, automotive, food)

Drawback shows up most often in industries with high import-to-export churn: textile and apparel companies that import fabric and re-export finished goods, electronics manufacturers assembling components from multiple countries, automotive parts suppliers moving inventory across the US-Canada border for assembly, and food and beverage companies that re-export a portion of imported ingredients or finished product. None of these industries are required to use drawback, but the volume and duty rates typical in these sectors tend to make the paperwork worth the recovery.

ROI math for mid-market importers

For a mid-market importer, the decision usually comes down to three numbers: how much duty gets paid annually on goods that end up re-exported or destroyed, how much of that is actually recoverable once ineligible duty types are excluded, and how much it costs (in-house time or a specialist's fee) to file and defend the claims. When the recoverable amount clears the cost of running the program by a comfortable margin, drawback is worth pursuing. When it doesn't, most importers skip it, at least until volume grows.

Canadian Drawback Under CUSMA

CUSMA Article 2.5 framework

Article 2.5 of CUSMA governs drawback and duty deferral programs between the US, Canada, and Mexico and establishes rules on the use of duty drawback programs and duty deferral programs. In practice, the article doesn't eliminate drawback between the three countries. It restricts it, through a formula described below.

Canada's 4-year refund window

Under Canada's general drawback program, in most cases you have to present a claim within 4 years (5 years for destroyed goods) from the time the goods enter Canada. For motor vehicles specifically, that window is also 4 years from the time the CBSA releases the imported vehicle, with separate export-timing rules for residents and non-residents. Claims filed after the deadline aren't eligible, regardless of the duty amount involved.

CBSA Memorandum D7-4-3 documentation requirements

CBSA's Memorandum D7-4-3 sets out the specific evidentiary requirements for CUSMA-related drawback claims, including how to calculate the "lesser of two duties" amount and what counts as satisfactory evidence for goods exported to another CUSMA country. Claims are filed and supporting documentation attached through the CBSA Assessment and Revenue Management (CARM) portal, which became the official system of record in 2024.

US Drawback Under 19 CFR 190

Substitution and unused merchandise rules

US drawback regulations, consolidated under 19 CFR Part 190 (the "modernized" drawback rules that took effect under the Trade Facilitation and Trade Enforcement Act, or TFTEA), split unused merchandise drawback into two tracks. Direct identification requires tracing the specific imported goods to the specific export. Substitution allows a claimant to match imported goods against exported goods that are merely commercially interchangeable (matched by the same 8-digit HTS classification), which is far more workable for companies that commingle inventory from multiple shipments.

Direct identification vs. accelerated payment

Direct identification and substitution both describe how you match imports to exports, not how fast you get paid. Accelerated payment is a separate privilege: once approved and backed by a bond, CBP pays accepted claims within weeks rather than the 6 to 12 months typical for clean filings that pay out only at liquidation. Most active drawback filers apply for accelerated payment specifically because it turns drawback into a cash-flow tool rather than a once-a-year windfall.

CBP's 5-year filing window

Under 19 CFR 190.31, drawback is allowable if, before the close of the 5-year period beginning on the date of importation and before the claim is filed, the merchandise is exported or destroyed under CBP supervision. The same 5-year structure applies to substitution claims and to manufacturing drawback. In amount, the total drawback allowable will not exceed 99 percent of the duties, taxes, and fees paid on the imported merchandise.

The Key Difference: How CUSMA Restricts Drawback

CUSMA Article 2.5's "lesser of two duties" rule

This is the mechanism that makes US-Canada trade different from drawback involving any other country. Under Article 2.5, no CUSMA party may refund customs duties paid on a good that is subsequently exported to another CUSMA party, used as a material in a good that's exported to another CUSMA party, or substituted by an identical or similar good used the same way, in an amount that exceeds the lesser of the duties paid on import into the first country and the duties owed on the same good in the destination country.

Why drawback is more constrained between CUSMA countries

In practice, this means a Canadian importer who brings in components, pays Canadian duty, manufactures a product, and re-exports it to the US can only recover the smaller of the two duty bills, not the full Canadian amount. One trade brokerage summarized the practical effect this way: since goods that qualify under the agreement often enter the US duty-free, the US side of that comparison can be zero, which makes the "lesser of two" amount zero and the importer ineligible for drawback on that shipment. That outcome surprises a lot of first-time filers, because it isn't obvious from the general drawback rules in either country on their own.

Where the rule doesn't apply (non-NAFTA-region re-exports)

The restriction is specific to trade between CUSMA parties. If a Canadian importer pays duty, then re-exports (or uses the goods to manufacture something re-exported) to a country outside the US, Canada, and Mexico, the "lesser of two duties" cap doesn't apply, and standard drawback rules govern the claim. The same logic runs in the other direction for US exporters shipping outside the CUSMA region.

Eligible vs. Ineligible Duty Types

MFN duty: eligible

Ordinary Most Favored Nation (MFN) duty, the standard tariff rate that applies to imports absent a special program or trade action, is drawback-eligible in both countries, subject to the CUSMA lesser-of-two-duties limit where it applies.

Section 301: eligible in US, parallel rule in Canada

Section 301 and Section 201 duties can be claimed on a US drawback claim. On the Canadian side, surtaxes imposed under the country's own trade-remedy orders are generally drawback-eligible as well, subject to a notable carve-out described below.

Section 232 derivative: NOT eligible

Section 232 duties (national-security tariffs on steel, aluminum, and covered derivative products) are the clear exception. Section 232 duties are not available for drawback in the US, and multiple presidential proclamations covering expanded derivative product lists have repeated that limited exceptions are available against them. 

Canadian surtaxes: drawback-eligible per surtax order

On the Canadian side, a 2025 surtax order carved out an exception to the usual CUSMA restriction: when goods are of US or Mexican CUSMA origin, they aren't subject to the "lesser of two duties" limitation, and may be eligible for full relief if CUSMA criteria are met. That's a narrower and more generous rule than the general drawback framework, and it only applies to the specific surtax orders it names, so it's worth confirming against the current order text before relying on it.

Building a Drawback Program in Canada

Inventory tracking requirements

A workable Canadian drawback program starts with inventory records that can tie a specific export (or destruction event) back to the original import entry, including quantities, classification, and duty paid. Companies using substitution-style matching still need records showing the goods are the same class and kind as what was imported.

Document retention (commercial invoices, proof of export)

Supporting documentation includes commercial invoices, proof of export (bills of lading, export declarations), and, for destroyed goods, a certified Form E15, Certificate of Destruction/Exportation, witnessed by a CBSA officer or an approved third party. CBSA can request additional records to establish a claim's validity at any point, so retention practices should assume an audit is possible well after the refund is paid.

Working with CBSA on first-time claims

First-time claimants file through the CARM portal and should expect CBSA to review supporting documentation closely, since there's no established filing history to draw on. Claims that name more than one eligible party (importer, exporter, manufacturer) also require waivers from every other eligible party before CBSA will process the claim.

Building a Drawback Program in the US

ACE drawback module mechanics

All US drawback claims are filed electronically through the Automated Commercial Environment (ACE), CBP's trade processing system, using the Automatic Broker Interface (ABI) system to line-match imports to exports. Manual, non-electronic drawback filing hasn't been available since February 2019, when the older core drawback rules under 19 CFR 191 were phased out in favor of 19 CFR 190.

Accelerated payment privilege application

Companies that want faster payment apply separately for the accelerated payment privilege. Approval requires a written application covering the claimant's recordkeeping and internal review procedures, and CBP can request a sample application format from the relevant drawback office.

Bonds and surety requirements

Accelerated payment isn't available without a bond. If approved, the claimant must furnish a properly executed bond in an amount sufficient to cover the estimated drawback to be claimed during the bond's term, and CBP will require additional coverage if outstanding accelerated claims start to exceed the bond amount. If the bond lapses or becomes insufficient, CBP doesn't reject the claim outright, but the accelerated payment request is removed until the bond issue is resolved.

When to Use a Drawback Specialist vs. In-House

ROI thresholds

Whether an in-house team or an outside specialist makes sense usually tracks the same volume question raised earlier: the more duty potentially recoverable, and the more claims filed per year, the more an in-house program can justify itself. Companies at lower volume, or filing for the first time, often lean on a specialist to build the initial program and only bring it in-house once claim volume and internal customs expertise both grow.

Cost benchmarks (typical fee structures)

Drawback specialists typically work on either a contingency basis (a percentage of the refund recovered) or a flat or hourly fee for filing and program-building work. Because fee structures vary by provider, claim complexity, and volume, a specific benchmark isn't something to take at face value without getting quotes tailored to your own import and export data.

Audit risk allocation

Contracts with drawback specialists should spell out who's responsible if CBSA or CBP later questions or denies a claim, including who handles the response and who bears any repayment. That allocation is a negotiation point, not a given, and it's worth confirming before a specialist starts filing on your behalf.

Common Drawback Mistakes

Missing the filing window

The most common and most final mistake is simple: filing after the 4-year (Canada) or 5-year (US) window closes. Neither agency has discretion to accept a late claim once the deadline has passed, which makes calendar tracking as important as the underlying duty calculation.

Insufficient inventory documentation

Claims built on incomplete inventory records, missing proof of export, or gaps in the chain connecting import to export tend to get delayed or denied rather than simply discounted. This is where clean, consistent product and shipment data pays off well before a claim is ever filed.

Over-claiming on ineligible duty types

Filing for drawback on duty types that don't qualify, most notably Section 232 duties in the US, or miscalculating the CUSMA "lesser of two duties" amount, invites a claim rejection or a later demand for repayment. Confirming duty-type eligibility before filing avoids both outcomes.

Conclusion

Getting the underlying data right, accurate classification, consistent product descriptions, and a clean record of duty paid per entry, is what makes a drawback claim defensible in the first place. That's the layer Gaia Dynamics' Classification Engine and Tariff Engine are built to support, by keeping HTS classifications and duty calculations consistent across the import records a drawback claim depends on.

Frequently Asked Questions

Can I claim drawback on Section 122 duties? 

Section 122 duties (balance-of-payments duties imposed under Section 122 of the Trade Act of 1974) have their own eligibility rules, and this is a case where the specific answer depends on the duty program in effect at the time of import. 

Does drawback work for goods that pass through a warehouse? 

Generally yes, provided the goods remain unused and the chain of custody from import to export can be documented, including time spent in a bonded warehouse or similar facility. The specific documentation needed can vary based on how the warehouse is bonded, so this is worth confirming with a broker for your particular facility.

How long does CBSA take to process a drawback claim? 

CBSA doesn't publish a fixed processing time, but if you don't receive a full refund within 90 days of submission, CBSA will pay interest on any balance owed, which gives claimants some financial protection against slow processing.

Can I claim both US and Canadian drawback on the same goods? 

Not in full. Where CUSMA's "lesser of two duties" rule applies, the combined recovery across both countries is capped at the smaller of the two duty amounts, not the sum of both. Outside CUSMA-eligible trade, this restriction doesn't apply.

What's the minimum shipment volume that makes drawback worthwhile? 

There's no fixed threshold, since it depends on duty rates, claim-filing costs, and how much of your imported volume is actually re-exported or destroyed. Running the specific ROI math described earlier, rather than relying on a general rule of thumb, gives a more reliable answer for your business.