Customs Clearance — Step-by-Step Import Clearance Guide

The process is managed by customs authorities like U.S. CBP, UK HMRC, or the Canada CBSA. Failure to clear customs properly can result in shipment holds, penalties, or seizure of goods.

1. Pre-Arrival Filing: Before goods arrive, the importer or broker submits an advance cargo declaration. In the US, this is the ACE (Automated Commercial Environment) filing, due 24 hours before vessel loading. The EU requires an ENS (Entry Summary Declaration) via the ICS2 system.
2. Cargo Arrival & Manifest Review: When the vessel/aircraft arrives, customs matches manifest data against advance filings. Discrepancies trigger holds.
3. Import Declaration Filing: The importer of record (or their customs broker) files the formal import declaration containing: product description, HS code, country of origin, customs value, and supporting documents.
4. Risk Assessment & Inspection: Customs runs automated risk scoring. Low-risk shipments proceed directly; flagged shipments undergo document review or physical inspection (X-ray, sampling, or full container exam).
5. Duty & Tax Assessment: Customs calculates applicable duties and taxes based on the declared classification and value.
6. Payment & Release: Once duties are paid (or secured by a customs bond), goods are released from customs control. The importer receives clearance authorization.
7. Post-Clearance Audit: Customs retains the right to audit declarations for up to 5 years. Importers must keep all supporting documentation.

Missing or incorrect documentation is the #1 cause of clearance delays. The essential documents are:

For a comprehensive list, see our Import Documents Guide.

A customs broker is a licensed professional who files import declarations, calculates duties, and navigates regulatory requirements on behalf of importers. While not legally required in every country, using a broker is strongly recommended for:

• Commercial shipments: Brokers have direct electronic connectivity with customs systems (ACE in the US, CHIEF/CDS in the UK) for fast filing.
• Complex classifications: Products that could fall under multiple HS codes benefit from a broker's classification expertise.
• Regulated goods: Food, drugs, chemicals, and electronics require coordination with multiple agencies (FDA, CPSC, EPA in the US).
• High-value shipments: The cost of a broker ($100–$300 per entry) is trivial compared to the risk of classification penalties on a $500K shipment.

In the US, customs brokers must pass the CBP-administered licensing exam — one of the most difficult professional exams in trade, with a pass rate typically under 15%.

• Incomplete or inconsistent documentation: Mismatched values between the invoice and declaration, missing packing lists, or unsigned certificates of origin. Always ensure documents are cross-verified before filing.
• Incorrect HS code classification: Customs will hold goods if the declared code doesn't match the physical product. Use our AI HS Code Finder to validate before shipping.
• Customs exam selection: Approximately 3-5% of shipments are selected for physical inspection. This is largely random but influenced by risk profiling (new importers, high-risk origins, anomalous values).
• Regulatory agency holds: Food (FDA), consumer products (CPSC), alcohol/tobacco (TTB), and chemicals (EPA) all have separate clearance requirements that run parallel to customs.
• Anti-dumping/CVD orders: If your goods are subject to AD/CVD orders, additional documentation (certificates, scope rulings) is required before release.
• Customs bond issues: Insufficient bond coverage or expired bonds will prevent release until a new bond is filed.