ISF 10+2 Filing for China-USA Shipments: Complete Guide

ISF 10+2 filing is a mandatory U.S. Customs requirement for ocean freight shipments originating from China, requiring importers or their customs brokers to submit 10 data elements 24 hours before vessel departure and 2 additional elements before cargo arrival. This advance filing system—formally known as the Importer Security Filing and Additional Carrier Information—protects against security threats while ensuring smooth customs clearance for your China-USA shipments.

Whether you're an Amazon FBA seller receiving weekly shipments from Shenzhen or a B2B importer managing bulk orders, understanding ISF 10+2 requirements can save you thousands in penalties, avoid container holds, and expedite your cargo through Los Angeles, Long Beach, or other U.S. ports. At King-Hor Supply Chain, we've filed ISF for over 1,000 clients since 2015, and we'll walk you through every requirement in this complete guide.

Who Should File ISF 10+2?

The ultimate consignee (the party taking ownership of the goods in the U.S.) is responsible for filing ISF 10+2, though they typically authorize a licensed customs broker or freight forwarder like King-Hor to submit it on their behalf.

Under 19 CFR 149.2, U.S. Customs and Border Protection (CBP) requires ISF filing for all ocean freight shipments arriving at U.S. ports. However, the responsibility chain works like this:

• Ultimate Consignee: The legal owner receiving goods in the U.S. Bears final liability if filing fails
• Importer of Record (IOR): Often the consignee; must ensure ISF accuracy
• Customs Broker or NVOCC: Usually files on behalf of the consignee; King-Hor handles this for Amazon FBA sellers and B2B importers
• Freight Forwarder: Gathers documents and coordinates with brokers and carriers

The key point: if you import from China by ocean, you need ISF filing—no exceptions. Even small shipments under $800 require ISF. Air freight to the U.S. is exempt from ISF, which is one reason some high-value or time-sensitive shipments bypass ocean routes entirely.

King-Hor's customs clearance team files ISF for all ocean shipments in our FBA door-to-door service and standard LCL/FCL packages. We submit the filing as soon as your bill of lading (BL) is issued, typically 24–48 hours after container stuffing in Shenzhen or Hong Kong, ensuring CBP receives complete, accurate data before the 24-hour deadline.

What Documents Are Required for ISF Filing?

The core ISF filing requires a bill of lading, commercial invoice, packing list, and country-of-origin documentation, though the exact package depends on your HS code and product category.

Here's what CBP expects for a complete ISF submission:

Document	Purpose	Typical Turnaround	Notes
Bill of Lading (BL)	Proof of shipping; carrier reference	Issued within 24 hrs of stuffing	Must match ISF shipment details exactly
Commercial Invoice	Declares value, terms of sale, HS codes	Pre-shipment (usually 3–5 days before)	Required for duties/taxes calculation
Packing List	Details contents per carton/case	Pre-shipment	Aids cargo inspection at U.S. port
Country of Origin Certificate	Certifies manufacturing location	Pre-shipment or at port entry	Required for tariff classification; affects duties
Master BL (for consolidations)	Groups multiple shipments into one container	Issued after all house BLs received	King-Hor issues for LCL shipments
Insurance Certificate (if applicable)	Proves cargo insurance coverage	Pre-shipment	Required only if insured; typical cost 1–2% of value

Beyond these essentials, you'll also need:

• Seller/Exporter details: Factory address, contact info, tax ID
• Buyer/Importer details: Your U.S. business address, EIN, phone
• Freight forwarder or NVOCC info: King-Hor's carrier code and Shenzhen/Hong Kong office details
• Container/seal numbers: Equipment reference for port verification
• Weight and dimensions: Gross and net weights, container measurements

At King-Hor, we request these documents during the booking process, typically 5–10 days before your container departs Shenzhen or Hong Kong. We've streamlined the document collection process through our online portal, so Amazon FBA sellers and B2B importers can upload invoices and packing lists in one place. This reduces back-and-forth delays and ensures we submit ISF accurately.

Missing or incorrect documents can trigger CBP holds, detention fees ($150–$500/day), or customs penalties. We've helped over 1,000 clients avoid these costs by double-checking all filings before submission.

How to Fill the ISF?

ISF is filed electronically through the Automated Broker Interface (ABI) or eManifest system, with 10 data elements due 24 hours before vessel departure and 2 additional elements (container/seal numbers) due 24 hours before cargo arrival at the U.S. port.

The 10+2 framework breaks down as follows:

The 10 Elements (Due 24 Hours Before Vessel Departure)

1. Importer of Record (IOR) Number: Your EIN or CBP ID
2. Consignee Name and Address: The U.S. entity receiving goods
3. Exporter Name and Address: Your supplier in China
4. Ultimate Consignee Name and Address: Often same as #2 if you own the goods; differs if you're reselling
5. Buyer Name and Address: Party purchasing the goods (can differ from consignee)
6. Seller Name and Address: Party selling the goods from China
7. Ship-To Party: Where goods physically arrive in the U.S. (e.g., Los Angeles port, King-Hor's warehouse)
8. Commodity Description: Detailed product info (materials, HS codes, use case)
9. Harmonized Tariff Code (HTS): 10-digit classification determining duty rates
10. Country of Origin: Usually China, but verify for duty implications

The 2 Additional Elements (Due 24 Hours Before Arrival)

1. Container Number: The actual shipping container ID
2. Seal Number: Security seal affixed after stuffing

Step-by-step filing process:

1. Gather documents (invoice, packing list, BL) and send to your customs broker or King-Hor at least 3 days pre-departure
2. Verify HTS codes with your supplier or broker; incorrect codes delay clearance and invite duty recalculations
3. Confirm shipper/consignee addresses match exactly on all documents (any discrepancy triggers CBP queries)
4. Submit ISF 10 elements to ABI (usually done by your broker 24 hours before vessel departure); King-Hor coordinates this automatically
5. Obtain container/seal numbers at stuffing; provide to broker immediately
6. Submit ISF 2 elements 24 hours before vessel arrival at U.S. port
7. Monitor filing status through the CBP system or King-Hor's tracking portal; we notify you of any discrepancies
8. Prepare for entry (duties, fees) once ISF is accepted

Common filing errors we've caught for clients:

• Mismatched addresses: China factory address differs on invoice vs. BL (we reconcile)
• Wrong HTS codes: Garments filed as "textiles" rather than specific apparel category (duty rate difference: 12% vs. 20%)
• Incomplete commodity descriptions: "Electronics parts" instead of "USB Type-C connectors, plastic housing"—too vague for CBP
• Late submissions: Broker receives documents only 12 hours pre-departure; we maintain 48-hour buffer

ISF Filing Costs and Timeline

ISF filing itself is often included in your freight forwarder's service, though standalone customs brokers may charge $100–$300 per filing. King-Hor includes ISF filing at no extra charge for all ocean shipments (FCL, LCL, and FBA door-to-door).

Typical China-to-USA ocean timeline with ISF:

• Day 0: Cargo stuffed in Shenzhen/Hong Kong; container sealed
• Day 1: BL issued; ISF documents sent to broker
• Day 2: ISF 10 elements filed (24 hrs before vessel departure)
• Days 3–12: Vessel transit (10–14 days typical, depending on port pair; Shenzhen to Los Angeles is ~10 days)
• Day 12: Vessel arrives at U.S. port; ISF 2 elements submitted
• Days 12–15: CBP examination, duties assessed, customs clearance
• Days 15–17: Release to importer or King-Hor's LA warehouse; then ground delivery to your facility

For Amazon FBA shipments, King-Hor's door-to-door service combines ocean freight, ISF filing, customs clearance, and trucking to your FBA facility (typical cost: $2,200–$3,500 per 20ft container from Shenzhen to Los Angeles distribution center, including all fees). This is often cheaper and faster than self-managing three separate vendors.

Why Partner with King-Hor for ISF Filing?

Since 2015, King-Hor has filed ISF for 1,000+ Amazon FBA sellers and B2B importers across 40+ product categories. Our Shenzhen, Hong Kong, and Los Angeles offices ensure zero delays:

• Same-day ISF filing once documents are received; no bottlenecks
• Customs clearance included: We handle all duties, taxes, and CBP communication
• LA warehouse availability: Store goods temporarily if your FBA warehouse isn't ready; $0.40/unit/day
• Transparent pricing: No hidden broker fees; all-in quotes include ISF, duties, and delivery
• Proactive communication: You'll receive real-time tracking updates and CBP status alerts

Get a free quote today. Whether you're shipping 5 SKUs or 500, let King-Hor handle ISF filing and customs clearance so you can focus on sales. Contact us for a customized China-to-USA ocean freight solution.