Editor's Note (March 2026): This article was originally published in January 2025. Since publication, the regulatory landscape described here has changed significantly. The US de minimis exemption under Section 321 was permanently eliminated on August 29, 2025. Shipments valued under $800 no longer automatically qualify for duty-free entry into the United States. The operational workflows and techSHIP Enterprise capabilities described in this article remain relevant for cross-border logistics, but the specific tariff strategy outlined should be read in its original context. For updated guidance on cross-border shipping after the Section 321 elimination, see our article: How Shippers Are Adapting with Automated Cross-Border Workflows.
Cross-border shipping into the United States involves two compliance requirements that trip up many 3PLs and brands: ACE Manifest filing and Section 321 processing. Getting both right reduces customs delays, cuts operational costs, and keeps U.S.-bound goods moving on schedule. This article covers what each requirement involves and how to manage them efficiently.
The Automated Commercial Environment (ACE) system requires highway carriers entering the United States to submit an electronic manifest. This process, known as the ACE Manifest, is designed to facilitate trade and enhance border security. Carriers must file these manifests at least an hour before arrival at the border to ensure compliance.
This provision under the Trade Facilitation and Trade Enforcement Act allows shipments valued at $800 USD or less to enter the U.S. duty-free. It simplifies customs processes, ensuring low-value goods move efficiently through the supply chain—a major advantage for brands shipping directly to consumers.
For 3PLs and brands, managing ACE Manifests efficiently produces several measurable advantages:
Section 321 shipments allow qualified goods to clear customs without incurring duties. Accurate classification and documentation are critical to benefit from this provision. Automating these processes and integrating tools that recognize Section 321 shipment types can maximize operational efficiency and compliance.
For fulfillment centers and brands, efficient ACE Manifest management and leveraging Section 321 can translate into measurable returns:
For 3PLs, demonstrating competency in both ACE filing and Section 321 processing is increasingly a baseline expectation from e-commerce brands evaluating fulfillment partners.
Advanced platforms like techSHIP simplify the complexities of cross-border shipping through automation and compliance features. With techSHIP, users can:
Preparing an ACE Manifest involves several key steps to ensure accuracy and compliance:
To avoid rejections or delays, all orders must include:
Verifying this information before processing ensures smooth cross-border operations and compliance with customs requirements.
Efficient management of ACE Manifests and Section 321 shipments is essential for anyone involved in cross-border logistics. By leveraging tools like techSHIP, carriers and shippers can achieve significant cost savings, improved efficiency, and simplified workflows.
An ACE Manifest is an electronic document that highway carriers entering the United States must submit through the Automated Commercial Environment (ACE) system. It must be filed at least one hour before the carrier arrives at the border. It applies to carriers transporting goods into the U.S. by road.
Section 321 is a provision under the Trade Facilitation and Trade Enforcement Act that allows shipments valued at $800 USD or less to enter the United States duty-free. For brands shipping directly to consumers, this removes import duties on qualifying low-value orders, reducing landed costs.
According to a study by the American Transportation Research Institute, the ACE e-Manifest system provides annual cost savings of over $2,000 per carrier in most scenarios analyzed, primarily through reduced manual paperwork and faster border crossings.
Each order included in an ACE Manifest must have a full ship-to address and phone number, along with SKU-level details including product description, country of origin, unit price, and HTS code where applicable.
techSHIP automates ACE Manifest preparation through batch manifesting and ACE-ready file exports, reducing manual data entry and the risk of errors. It also identifies Section 321-eligible shipments to ensure qualifying goods receive duty-free treatment while staying compliant with customs requirements.
Integrating techSHIP’s ACE Manifest solution into your shipping operations can lead to significant cost and time savings. A study by the American Transportation Research Institute found that the U.S. Customs and Border Protection’s ACE e-Manifest system provides annual cost savings of over $2,000 per carrier in most scenarios analyzed.
By automating the submission of electronic manifests, techSHIP reduces manual paperwork and expedites border crossings, allowing carriers to allocate resources more efficiently and improve delivery schedules. This streamlined process not only enhances operational efficiency but also contributes to substantial financial savings.
Shippers using techSHIP can expect to optimize their cross-border operations, saving both time and money while ensuring compliance with all regulatory requirements.
Want to see how techSHIP handles ACE Manifest filing and Section 321 processing in practice? Schedule a call with our team today.