How to Prepare Your Products for US Customs When Imported from China

Importing from China can save you money. It can also give you a headache if you skip customs steps. Follow this clear plan. You will reduce delays, fines, and surprise fees. Supplier Ally (https://sourcingall.com) helps many importers manage this process. Think of us as your import co-pilot.

Start with the importer of record

Decide who is the importer of record. This party is legally responsible for the shipment. They pay duties. They file entries. They keep records. Most small businesses use a licensed customs broker as the importer of record or hire a third-party logistics provider.

Classify products with the correct HTS code

Use the Harmonized Tariff Schedule (HTSUS) for classification. HTS codes are numeric. They go to 10 digits in the U.S. A single digit difference can change your duty rate. Check the U.S. International Trade Commission (USITC) for HTS lookup. If unsure, request a binding ruling from CBP.

Know duties, tariffs, and special measures

Calculate duty costs before you place an order. Include all tariff measures in your landed cost. Watch for:

Section 301 tariffs on many products from China.
Anti-dumping (AD) and countervailing duties (CVD) for certain categories.
Quotas or other import limits.

Tariffs change. Check CBP and USITC before shipping. Add a buffer to your cost model. A 25% surprise tariff will hurt your margin.

File your Importer Security Filing (ISF) on time

For ocean shipments, file the ISF at least 24 hours before the cargo leaves the foreign port. ISF is often called “10+2.” If you miss the filing, expect fines from CBP and port delays. Air shipments have different security rules. Ask your broker which applies.

Assemble required documents

Make sure you have these documents ready and accurate:

Commercial Invoice (correct HTS codes and values)
Packing List (weights, dimensions, pallet count)
Bill of Lading or Air Waybill
Certificate of Origin (if claiming preferential duty)
Certificates of Conformity or Testing Reports
Insurance Certificate
Power of Attorney for your customs broker

Missing or incorrect documents slow customs. Small errors become big delays.

Meet agency-specific requirements

US Customs is not the only agency. Other federal agencies regulate many products. Here are common examples:

FDA — food, dietary supplements, cosmetics, some medical devices.
FCC — wireless devices and communications equipment.
CPSC — toys, children’s products, and general consumer safety.
EPA — chemicals, pesticides, and certain engines.
USDA — some agricultural products and foodstuffs.
IATA/DOT — lithium batteries and hazardous goods for air or road transport.

Check which agency applies to your product. Follow their testing and labeling rules. Non-compliant shipments face holds or seizures.

Labeling and product testing

Labeling matters. Country of origin must appear on most imported goods. Textile and apparel have specific FTC rules. Kids’ products must meet CPSIA limits for lead and phthalates.

Use accredited labs for testing. Keep test reports on file. CBP may request them. If your product requires certification (FCC, FDA, etc.), keep the certificate with your shipping documents.

Choose a customs broker and bonding strategy

Work with a licensed customs broker. They file entries, pay duties, and communicate with CBP. Ask about power of attorney, entry bonds, and periodic bonds. A bond allows customs to release goods while duties are processed.

Use the Automated Commercial Environment (ACE) for electronic filings. Your broker should have ACE access and ABI capability. This speeds customs clearance.

Packing, marks, and logistics

Label pallets clearly. Include carton-level packing lists. Use durable packaging for long sea journeys. For FCL shipments, mark container numbers on paperwork. For LCL, ensure consolidation paperwork is correct.

Avoid mixed shipments with different HS classifications on the same container unless your broker knows how to separate entries. Mis-packed containers cause fumigation or repacking delays at the port.

Common mistakes and how to avoid them

Wrong HTS code — Verify with a broker or USITC.
Missing ISF — File 24+ hours before vessel departure.
No agency approvals — Check FDA, FCC, CPSC rules early.
Under-declaration of value — CBP audits are expensive.
Poor labeling — Country of origin and safety marks are required.

Plan early. Test early. Fix issues before mass manufacturing. That saves money and stress. Think of customs like a strict but fair airport security agent. Don’t show up with prohibited items.

Quick importer checklist

Decide importer of record and hire a broker.
Get correct HTS codes and duty estimates.
File ISF 24+ hours before vessel departure.
Prepare commercial invoice, packing list, and B/L or AWB.
Obtain necessary agency certificates and test reports.
Ensure correct labeling and country of origin marks.
Keep records for five years from entry date.

Need hands-on help? Supplier Ally at https://sourcingall.com guides you from supplier selection to customs clearance. We help verify compliance, prepare documents, and coordinate with brokers. Think of us as the practical partner who reads the fine print so you don’t have to.

Importing can be smooth. Do the homework. Use a good broker. Keep clear records. And yes, bring snacks for the paperwork. You might need them.