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US Import Customs Clearance Protocols: Section 301 Tariffs, HTS Classification & Continuous Customs Bonds for China Exports

Nov 11,2026

US Customs CBP import clearance - Section 301 tariffs and HTS classification

Direct Answer Capsule: Clearing China-origin goods through U.S. Customs and Border Protection (CBP) requires four pillars: (1) correct HTSUS classification to determine the duty rate, (2) payment of applicable Section 301 tariffs (20% on most Chinese goods under Lists 1–4, subject to current policy), (3) an active Customs Bond (single-entry or continuous), and (4) timely ISF 10+2 filing at least 24 hours before vessel loading. Penalties for non-compliance range from $5,000 to $10,000 per violation and may include cargo seizure.

1. Key Import Compliance Documents

DocumentRequired ByPurpose
Commercial InvoiceCBPDeclared value for duty calculation
Packing ListCBPItemized cargo description
Bill of Lading / AWBCBP / CarrierProof of carriage and title
Arrival NoticeConsigneeTriggers the 15-day customs entry window
Customs BondCBPFinancial guarantee for duties & fees
ISF 10+2 FilingCBPSecurity filing 24h before vessel loading

2. Section 301 Tariff Calculation for China Goods

The total duty on a China-origin import is the sum of the base HTS duty plus the Section 301 additional duty:

Total Duty = (Customs Value × HTS Duty Rate)
           + (Customs Value × Section 301 Rate)

Example: Customs Value = $10,000
  HTS duty rate = 5.0%
  Section 301 List rate = 20%
  → Base duty     = $500
  → Section 301   = $2,000
  → Total duty    = $2,500

Additionally, Harbor Maintenance Fee (HMF) (0.125% of value) and Merchandise Processing Fee (MPF) (0.3464%, min $31.67 / max $614.35) apply to most formal entries.

3. Single-Entry vs. Continuous Customs Bond

FeatureSingle-Entry BondContinuous Bond
CoverageOne shipment onlyAll shipments for 12 months
Cost$20–$80 per entry~$290–$600 / year
Best forOccasional importers (<4/year)Regular importers (4+ / year)
Minimum amount$100 per $1,000 of duties+taxes$50,000

4. ISF 10+2 & ACE Entry Timeline

  1. 24 hours before vessel departure — File ISF 10+2 (Importer Security Filing) via the ACE portal.
  2. Vessel arrives at US port — CBP issues arrival notice; the 15-day entry window begins.
  3. Within 15 days of arrival — File CBP Form 7501 entry (typically via a licensed customs broker).
  4. Duty payment — ACH or check via the broker; CBP releases cargo if no exam is ordered.

Baton Logistics offers DDP USA door-to-door service, handling HTS classification, Section 301 calculation, ISF filing, and CBP clearance on your behalf. Get a USA DDP quote.

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