The Customs Value is the valuation of imported goods used by customs authorities to assess duty, tax, and statistical reporting. The standard method under the WTO Customs Valuation Agreement (CVA, also called the GATT Valuation Code) is transaction value, the price actually paid or payable for the goods in the export sale to the importing country, with prescribed adjustments for freight, insurance, packing, royalties, and other items. When transaction value is unavailable or unacceptable, customs authorities fall back through five secondary methods in a fixed sequence. The customs value is the foundation of every duty calculation; an incorrect customs value flows through to incorrect duty, tax, and AD/CVD assessment.
The six valuation methods (in sequence)
| Method | Basis | Used when |
|---|---|---|
| Method 1: Transaction value | Price paid or payable in the export sale + adjustments | Default for arms-length sales |
| Method 2: Transaction value of identical goods | Customs value of identical goods entered around the same time | Method 1 unavailable |
| Method 3: Transaction value of similar goods | Customs value of similar goods entered around the same time | Methods 1 and 2 unavailable |
| Method 4: Deductive value | Resale price in the importing country less costs and profit | Methods 1-3 unavailable |
| Method 5: Computed value | Production cost + general expenses + profit | Methods 1-4 unavailable; importer can elect Method 5 before Method 4 |
| Method 6: Fall-back | Reasonable means consistent with the CVA principles | Methods 1-5 all unavailable |
The CVA requires sequential application, customs cannot skip methods. In practice, ~95% of routine import entries are valued under Method 1.
What is added to the transaction price under Method 1
The transaction value is the price paid plus specific additions defined in the CVA. The standard additions:
| Addition | Description |
|---|---|
| Commissions and brokerage | Buying commissions paid by the buyer to a third-party agent (excluded if paid to the buyer’s own agent) |
| Packing costs | Cost of containers and packing labour to the buyer |
| Assists | Materials, components, tools, dies, design, or engineering supplied by the buyer free or at reduced cost |
| Royalties and license fees | Related to the imported goods, to the extent not already in the price |
| Proceeds of subsequent resale | Any portion of the resale revenue accruing to the seller |
| Freight to the port of import | If the contract is FOB or otherwise excludes freight |
| Insurance to the port of import | If not already in the price |
For an FOB contract, the customs value at the US port is the FOB price + ocean freight + marine insurance. For a CIF contract, the customs value is essentially the CIF price (with minor adjustments). For a DDP contract, the customs value is the DDP price minus the duty (because the duty is paid by the seller and is not part of the dutiable value).
What is deducted from the transaction price
Permitted deductions if separately identified on the commercial invoice:
| Deduction | Description |
|---|---|
| Cost of construction, erection, assembly | Labour costs incurred after import |
| Transport after the place of importation | Inland freight from the import port to the buyer’s warehouse |
| Customs duties and taxes payable in the importing country | Duties themselves are excluded from the dutiable value |
| Discounts | Trade and quantity discounts that are conditions of the export sale |
For a US import, the dutiable value is typically the cargo’s price at the foreign export port plus freight and insurance to the US port. Inland trucking from the US port to the buyer’s warehouse is not part of customs value.
The related-party transaction trap
When the seller and the buyer are related parties (parent-subsidiary, common ownership, common control), the transaction value may be rejected by customs unless the importer can demonstrate that the price was set as if between unrelated parties. Three circumstances commonly trigger customs scrutiny:
- Inter-company transfers from a Chinese factory to its US subsidiary. A Chinese parent shipping to a wholly-owned US subsidiary at “transfer price” is a related-party transaction. Customs may reject the transfer price if it is significantly below the market price for similar product.
- Royalty and assist payments not declared. A US importer that owns the trademark or supplies tooling to a Chinese factory must declare the royalty or assist value as part of the customs value. Failure to declare is a recurring CBP audit finding.
- Buying commission disguised as cost-of-goods. A Chinese trading company that adds commission to its invoice without separately identifying it can have the entire commission treated as part of the dutiable price.
The mitigation: maintain transfer-pricing documentation showing how the related-party price was set, and disclose related-party status on the customs entry.
How customs value affects duty calculation
A simple worked example for a Chinese citric acid shipment:
| Item | Value |
|---|---|
| FOB Shanghai price | USD 80,000 |
| Ocean freight to Houston | USD 4,000 |
| Marine insurance | USD 200 |
| Customs value (CIF Houston basis) | USD 84,200 |
| MFN tariff at HTS 2918.14.00 (6.0%) | USD 5,052 |
| Section 301 List 3 surtax (25%) | USD 21,050 |
| Antidumping cash deposit (~150% on producer X) | USD 126,300 |
| Countervailing cash deposit (~75% on producer X) | USD 63,150 |
| Total cash deposit at entry | USD 215,552 |
| Cargo cost-to-importer at entry (CIF + duties) | USD 299,752 |
Every duty in this calculation flows from the customs value. A USD 1,000 understatement of the customs value would produce a USD 2,556 understatement of total duty (roughly 256% of the underlying error, because the AD/CVD rates compound on the same base). CBP penalties for under-valuation can be 100% to 400% of the loss of revenue.
How customs value catches importers off guard
Three failure patterns recur:
- Buyer side adjustments excluded. The US importer pays the Chinese factory USD 80,000 and pays a separate USD 5,000 commission to a sourcing agent in the US. The customs value should include the USD 5,000 if the agent is acting for the seller; it should be excluded if the agent is the buyer’s agent. Most importers default to excluding it; CBP audits sometimes find the agent is in fact a buying agent for the seller and reassess.
- Tooling assist not declared. A US importer that supplies dies or moulds to the Chinese factory free of charge for use in producing the imported goods must add the apportioned tooling cost to each shipment’s customs value. Tooling assists are routinely overlooked.
- First-sale doctrine misapplied. US importers can sometimes use the first-sale price in a multi-tier transaction (e.g. factory → trading company → US importer) to lower the customs value. The first-sale rule requires specific evidentiary support; misapplied first-sale claims are reversed at audit.
Customs value in China-to-Australia trade
For Australian imports, the customs value methodology mirrors the WTO CVA and is administered by the Australian Border Force (ABF). The same six-method hierarchy applies. The Free On Board (FOB) basis is used for valuation in Australia (the customs value is the FOB price at the foreign port of export, with freight and insurance to Australia treated separately for GST purposes), in contrast to the US which uses a CIF-equivalent basis. This methodology difference is one of the small structural reasons that landed-cost models for the same product differ between US and Australian destinations.
Related terms
HTS Code classification determines the duty rate; customs value determines the base on which the rate is applied. Anti-Dumping Duty and AD/CVD cash deposits are calculated on customs value. Section 301 surtax is calculated on customs value. Duty Drawback refunds duty on the customs-value basis. Commercial Invoice is the primary supporting document for customs value. FOB and CIF Incoterms determine which costs are included in the contract price.