The 15-Second Definition
The First Sale Rule is a U.S. customs valuation provision that can allow an importer to use the price paid in an earlier sale in a multi-tier transaction as the basis for customs value.
For example, a foreign manufacturer may sell goods to a middleman, who then sells them to a U.S. importer. If the transaction meets the applicable requirements, the importer may be able to use the manufacturer-to-middleman price rather than the higher middleman-to-importer price for customs valuation.
Because customs duties are often based on the value of the imported goods, using the qualifying earlier-sale price can result in lower duties.
Why It Matters
In a multi-tier supply chain, the price paid by the U.S. importer may be higher than the price paid earlier in the transaction. If the First Sale Rule applies, that difference can create a meaningful customs-duty savings across repeated imports.
This can be particularly relevant when a sourcing structure involves foreign manufacturers, trading companies, buying agents, or other intermediaries.
But the potential savings come with a documentation burden. An importer using First Sale treatment needs to be able to substantiate the underlying transaction and demonstrate that the earlier sale qualifies under U.S. customs requirements.
For businesses with high import volumes, the value of the rule therefore has to be weighed against the work required to support it.
How It Works
To use the First Sale Rule, the importer must establish that the earlier transaction qualifies as a bona fide sale for export to the United States.
The goods must ultimately be destined for the U.S., and the transaction must be supported by documentation showing the relevant parties, prices, terms of sale, and flow of the goods.
The importer also needs to account for any amounts that must be added to the transaction value under U.S. customs rules.
The key issue is proof. CBP may request records demonstrating that the earlier sale was a genuine transaction and that the declared value is properly supported.
If those requirements cannot be established, the importer may not be able to use the earlier-sale price for customs valuation.
In Practice
An apparel importer purchases garments through a trading company. The trading company buys the garments from the manufacturer for $10 per unit and sells them to the U.S. importer for $13.
If the First Sale Rule requirements are met, the importer may be able to use the $10 first-sale price as the basis for customs valuation rather than the $13 price.
At 50,000 units, that $3 difference represents $150,000 in customs value before considering any required additions.
The savings can become significant at scale, which is why First Sale can be worth evaluating for importers with consistent multi-tier sourcing arrangements.
Documentation & Recordkeeping
Using the First Sale Rule requires more than knowing the earlier purchase price. The importer needs records that connect the first sale to the goods ultimately imported into the United States.
Depending on the transaction, this can include purchase orders, commercial invoices, proof of payment, contracts, shipping records, and documentation showing the relationship between the manufacturer, intermediary, and U.S. importer.
The records should also support the circumstances of the sale and demonstrate how the declared customs value was calculated.
For importers using First Sale treatment regularly, maintaining this documentation consistently is important because CBP can request support for the values declared on import entries.
Key Takeaway
The First Sale Rule can allow an importer to base customs value on an earlier sale in a multi-tier transaction rather than the final price paid to the intermediary.
The potential duty savings can be significant, but the importer must be able to demonstrate that the transaction qualifies and support the declared value with appropriate records.
First Sale is not simply a lower-price option—it is a customs valuation strategy that has to be properly substantiated.
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