Section 321 & Canadian 3PLs: 2026 Guide
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US businesses, especially those focused on e-commerce, often run into the tough task of bringing in quality goods without facing high customs fees and complicated logistics. But there’s a solution that might not be on everyone’s radar – Section 321.
This regulation from U.S. Customs and Border Protection could really make a difference for companies trying to improve their supply chain and lower their costs.
Section 321 is a policy from U.S. Customs and Border Protection that significantly simplifies the import process for small shipments.
It’s particularly beneficial for e-commerce businesses, allowing goods valued up to $800 to enter the U.S. duty-free and tax-free. This makes importing low-value items more efficient and cost-effective.

Section 321 offers several advantages for businesses, making it a valuable asset for smoother and more economical operations:
Working with a Canadian Third-Party Logistics (3PL) provider can be beneficial for businesses in leveraging Section 321 of the U.S. Customs and Border Protection (CBP) regulations. Here’s how:

Section 321 offers great opportunities for businesses doing cross-border trade, particularly in e-commerce. However, it comes with its own set of challenges.
It’s important for businesses to carefully choose a 3PL partner that has a proven track record, understands the specific needs of the business, and is well-versed in the regulatory environments of both countries.
Additionally, staying updated on any changes to customs regulations and Section 321 is crucial for maintaining compliance and optimizing the benefits of cross-border trade.
Navigating the complexities of Section 321 for efficient cross-border trade can be challenging. MacMillan, a leading Canadian Third-Party Logistics (3PL) provider, offers the expertise and solutions to simplify this process for your business.
Explore MacMillan’s services and unlock the full potential of your e-commerce operations with a trusted, efficient logistics partner by your side.
Section 321 is a U.S. customs provision historically associated with simplified entry for low-value shipments. However, duty-free de minimis treatment under Section 321 remains suspended in 2026 for eligible commercial shipments entering the U.S.
Not in the previous way. The U.S. suspended duty-free de minimis treatment for shipments regardless of value, country of origin, transportation mode, or entry method, subject to limited exceptions and special postal rules.
Canadian businesses shipping to U.S. customers may face additional duties, customs requirements, documentation, and entry procedures, making cross-border fulfillment planning more important.
A Canadian 3PL can support inventory management, order fulfillment, documentation, carrier coordination, and cross-border shipping processes to help businesses manage changing customs requirements more efficiently.
Businesses should review product origin, shipment value, applicable duties, customs documentation, carrier requirements, delivery expectations, and current U.S. import rules before selecting a cross-border fulfillment strategy.