In many supply chains the goods you import were sold more than once before they reached you: factory to middleman, middleman to you. Duty is normally charged on the price you paid, but the first sale rule can let you declare the earlier, lower factory price instead. It is a legitimate valuation method with strict conditions, and the savings are real when the paperwork holds up.
How the rule works
When goods pass through a middleman before export, there are two genuine sales: the factory sale and the sale to the importer. Customs law in the United States allows the importer, in defined circumstances, to base the dutiable value on the first of those sales rather than the final one. Because the factory price excludes the middleman markup, the declared value and the duty bill both fall.
The rule does not create a discount out of thin air. The first sale must be a real sale for export to the United States, made at arm's length between unrelated parties, with the goods clearly destined for the US market from the start. If any of those elements is missing, the final sale price is the value customs will use.
The documentation that proves it
Expect to show the full chain: factory invoice, middleman invoice, purchase orders, payment records, and transport documents that tie the same goods to both sales. Prices, quantities, and product descriptions must line up across the set. A gap between what the factory shipped and what the paperwork describes is the most common reason first sale claims unravel in review.
Keep the evidence assembled before the first entry, not after a customs query arrives. Importers who run first sale as a routine gather the factory documents with every shipment as part of normal receiving. Importers who treat it as an annual project end up chasing a foreign factory for year old invoices while a deadline runs, and some never get them.
Arm's length is the hard test
The factory and middleman must deal with each other as independent businesses. If they are related parties, the price between them gets extra scrutiny, and you may need to show that the relationship did not influence the price, using test values or comparable sales. A family owned factory selling through a family owned trader will struggle to meet that standard.
Transfer pricing habits can also cut across a first sale claim. If your group sets intercompany prices for tax purposes in a way that does not reflect a market sale, customs may reject the same price for valuation. Align the story your tax filings tell with the story your customs entries tell, because auditors compare them.
When the saving is worth the work
First sale pays best on high duty goods bought through a genuine middleman with a meaningful markup: apparel and footwear through trading companies are the classic case. On low duty goods, or where the middleman markup is thin, the compliance cost and audit exposure can exceed the duty saved, and the simpler final sale value is the better choice.
Model it per product line before switching. Take the duty rate, the average markup, and your annual volume, then subtract the broker time, document handling, and the reserve you should hold against a claim being denied. If the net is still clearly positive after that honest accounting, adopt it line by line rather than across the whole catalogue at once.
Keep reading
Related guides on this site: Bonded Warehouses vs Foreign Trade Zones: Which One Fits Your Imports Duty Drawback Explained: Recovering Duties on Goods You Export Again Answers for teams shipping Shopify orders across borders.
Frequently asked questions
Can any importer use the first sale rule?
Only where there is a genuine multi tier chain with a sale before the sale to the importer, the goods were destined for the United States from that first sale, and the price was set at arm's length. A single direct purchase from a factory has no earlier sale to use.
What documents prove a first sale claim?
Factory and middleman invoices, purchase orders, proof of payment for both sales, and shipping records linking the same goods through the chain. Quantities and descriptions must match across every document in the set.
Does using first sale increase audit risk?
It invites closer review because the declared value is lower, so claims should be documented before entry and applied consistently. Importers with clean, complete files generally clear review; importers reconstructing files after a query often lose the claim.
Can first sale combine with a free trade agreement claim?
The two address different things: first sale sets the value, an agreement sets the rate applied to that value. They can work together when the goods also meet the agreement's rules of origin, but each claim needs its own evidence.