Import Duty USA: Practical Guide for Shipments From China

For cross-border sellers shipping from China to the United States, import duty is one of the most important parts of landed cost. A product may have strong sales margins, but an incorrect HS code, missing valuation document, or unexpected Section 301 tariff can reduce profit or delay customs release.

What Is Import Duty in the USA?

USA import duty is a tax imposed by U.S. Customs and Border Protection (CBP) on goods entering the United States. The amount depends mainly on three factors:

• The product classification under the Harmonized Tariff Schedule of the United States (HTSUS)
• The customs value, generally based on the price paid or payable for the goods
• The country of origin, which may affect additional tariffs, quotas, or trade remedies

Import duty is separate from merchandise processing fees, harbor maintenance fees for ocean freight, excise taxes, and state or local taxes. Some products may also require Partner Government Agency review, such as the FDA, FCC, CPSC, EPA, or USDA.

How U.S. Import Duty Is Calculated

Most U.S. duties are charged either as a percentage of customs value or as a specific amount per unit. The HTSUS may show rates such as:

• Ad valorem: a percentage of value, for example 5%
• Specific duty: a fixed amount, such as dollars per kilogram, liter, or unit
• Compound duty: a combination of percentage and per-unit charges

A simple calculation is: customs value × duty rate = base import duty. Additional duties, if applicable, are then added. For example, if a shipment valued at $10,000 has a 5% HTSUS rate, the ordinary duty would be $500 before any other fees or China-specific tariff.

Question: Does Shipping Cost Count Toward Duty?

Usually, U.S. customs value is based on the transaction value of the goods, not simply on the delivered shipping price. International freight and insurance are generally not included in customs value for most import transactions, but the exact treatment depends on the terms of sale and valuation circumstances. Sellers should keep commercial invoices, payment records, supplier contracts, and freight invoices so CBP or a broker can verify the value.

HTSUS Code: The Most Important Classification Step

The HTSUS is a 10-digit U.S. classification system. The first six digits generally correspond to the international Harmonized System code, while the later digits identify U.S.-specific rates and statistical requirements.

Choosing a code only by product nickname is risky. For example, bags, electronics accessories, furniture parts, plastic household goods, and textile products may fall into different classifications based on material, function, and use. A wrong code can lead to underpayment, overpayment, detention, or a post-entry adjustment.

How to Classify Products Correctly

1. Identify the product’s material, function, model, dimensions, and intended use.
2. Search the official HTSUS or CBP classification resources.
3. Review the chapter notes and section notes, which may override a general description.
4. Compare similar rulings in CBP’s Cross Boundary rulings database.
5. Ask a licensed U.S. customs broker for a written classification opinion.
6. For high-volume or uncertain products, consider a CBP binding ruling.

China Shipments: Ordinary Duty vs Additional Tariffs

Goods from China may be subject not only to the normal HTSUS rate but also to additional tariffs, including Section 301 duties. The applicable additional rate depends on the product’s HTSUS number and the relevant tariff action. Some products may be excluded, but exclusions have effective dates and expiration rules.

Sellers should not assume that all Chinese products carry the same extra tariff. Two visually similar products can have different duty treatment based on composition, principal use, or classification. Always check the current HTSUS revision, USTR notices, and CBP guidance before booking a shipment.

Question: Who Is Responsible for Paying USA Import Duty?

The importer of record is legally responsible for duties, accurate classification, and customs compliance. In a DDP arrangement, the seller or its appointed agent may agree to pay charges on the buyer’s behalf, but the importer of record and compliance obligations must still be properly established. Under DAP, FOB, or EXW terms, the U.S. consignee or its broker usually handles entry and duty payment.

Before shipping, sellers should confirm Incoterms in writing. The named term determines cost allocation, but it does not by itself determine customs liability.

De Minimis Rules and Why They Matter

CBP allows certain low-value shipments to enter without formal entry under Section 322 of the Tariff Act, commonly called the de minimis procedure. The general statutory threshold is $800, but eligibility depends on the shipment type, recipient, product, country, and enforcement rules in effect at arrival.

Cross-border sellers should not build a business model around informal low-value entry without monitoring policy changes. Restricted goods, products subject to quotas or special duties, and split shipments designed to avoid duties may not qualify. For commercial replenishment inventory, formal entry and a customs bond are often required.

When Is a Customs Bond Needed?

A continuous customs bond is commonly used for regular commercial imports. A single-entry bond may be suitable for one-time shipments. Bonds help ensure that CBP receives duties, taxes, and penalties. A broker can advise whether a shipment needs a bond based on value, entry type, and regulated product requirements.

Documents Needed for U.S. Customs Clearance

For China-to-USA cargo, prepare the following before the goods arrive:

• Commercial invoice showing seller, buyer, product description, value, currency, and terms
• Packing list with weights, cartons, dimensions, and product quantities
• Bill of lading or airway bill
• HTSUS classification and country-of-origin information
• Supplier information and factory documentation where needed
• Product compliance documents, test reports, certificates, labels, or permits
• Arrival notice and delivery instructions for ocean or air freight

For medium and oversized cargo, accurate dimensions and weight are especially important. Customs, warehouse, and last-mile teams all rely on the same shipment details. Vague descriptions such as “sample,” “gift,” or “parts” increase the chance of inspection and delay.

Typical Transit and Clearance Timing

Transit time is separate from duty assessment, but planning both together helps prevent storage charges:

• China to U.S. West Coast ocean freight: commonly about 14–25 days port to port
• China to U.S. East Coast ocean freight: commonly about 25–40 days port to port, depending on routing
• China to U.S. air freight: commonly about 2–7 days airport to airport
• Customs release: often 1–3 business days if documents are complete, but inspections or PGA review may take longer

These are general service ranges, not guaranteed dates. Weather, vessel schedule, port congestion, peak season, cargo examination, and regulatory holds can affect total delivery time.

Step-by-Step Duty Planning Checklist

Step 1: Confirm the Importer Model

Decide whether the U.S. buyer, your U.S. entity, or a DDP service provider will act as importer of record. This affects billing, tax treatment, and clearance responsibility.

Step 2: Classify Before Pricing

Obtain the HTSUS code before publishing landed prices. Add ordinary duty, possible additional tariffs, processing fees, brokerage, freight, insurance, and last-mile costs.

Step 3: Verify Origin and Marking

Products must usually be marked with the country of origin in a manner visible to the ultimate purchaser. Packaging and labeling rules can vary by product category.

Step 4: Send Documents Early

Provide invoice, packing list, and cargo details to the customs broker before arrival. Early filing can reduce waiting time and demurrage or storage exposure.

Step 5: Keep Records

CBP generally expects importers to retain entry records for five years. Save classifications, duty calculations, supplier invoices, payment proofs, and broker communications.

Common Mistakes That Increase Cost or Delay

• Using the lowest-duty code without legal support
• Under-invoicing commercial goods to reduce duty
• Misstating country of origin or omitting origin marking
• Assuming Section 301 exclusions still apply without checking dates
• Sending oversized cargo with incomplete dimensions or loading details
• Waiting until arrival to arrange customs entry or a bond
• Ignoring FDA, FCC, CPSC, EPA, or other agency requirements

Question: Can Duties Be Reduced Legally?

Potential savings may come from correct classification, valid tariff exclusions, duty preference programs where eligible, bonded warehousing, temporary importation procedures, or foreign trade zones. However, these options have strict eligibility and documentation requirements. Misdescription, undervaluation, or transshipment solely to avoid tariffs are not legal duty-saving strategies.

How Shangwei Logistics Helps

Shangwei Logistics supports medium and oversized cargo shipping from China to the United States, including pickup, export handling, ocean or air coordination, customs documentation support, overseas warehousing, and tracked fulfillment. We help sellers prepare shipment documents and coordinate with licensed customs brokers, but final duty classification and legal tariff decisions should be confirmed through CBP resources or a qualified broker.

If you need a shipping plan with clear timing, cargo dimensions, and document requirements, contact Shangwei Logistics by phone, WeChat, or WhatsApp at 15914326324. Send your product list, HTSUS code if available, package dimensions, weight, and U.S. destination for a practical review. We promise a response within 5 minutes during working hours.