What Is An Importer Of Record Number?

Importer of Record Number The identifying number used by CBP for the party responsible for a U.S. import entry, commonly an EIN or a CBP-assigned number. This identifier links the shipment to the legal entity accountable for customs duties, compliance with U.S. import laws, and the accuracy of entry documentation.

At its simplest, the Importer of Record Number tells U.S. Customs and Border Protection (CBP) who is financially and legally responsible for an import transaction. For U.S.-based entities the number is most often an Employer Identification Number (EIN) issued by the Internal Revenue Service. For foreign entities that do not have an EIN, CBP may issue a numeric importer number assigned for use in Automated Commercial Environment (ACE) filings.

What The Identifier Covers

The importer number appears on the entry summary and related documents and ties to several obligations. It:

• Identifies Responsible Party: Connects duties, taxes, and penalties to the importer's legal entity.
• Enables Recordkeeping: Links commercial invoices, bills of lading, and certificates to a consistent account for audits and post-release reviews.
• Supports Targeting And Risk Management: Helps CBP apply enforcement holds, security holds, or selectivity rules to specific importers.

Why Importer Numbers Matter

CBP enforces customs law based on who is listed as the importer of record. Mistakes or omissions in the importer number can delay clearance, create duty assessment errors, or expose the wrong party to penalties. For supply chains that move high volumes or risk-classified goods, a correct importer number is the foundation of accurate classification, valuation, and country-of-origin declarations.

How Importer Numbers Vary

Importer numbers are not one-size-fits-all. Common variants include:

• EIN (U.S. Entities): The IRS-assigned Employer Identification Number is the preferred importer number for U.S. businesses and nonprofit organizations.
• CBP‑Assigned Importer Number (Foreign Entities): When foreign firms lack an EIN, CBP assigns a unique number used in ACE filings and entry documentation.
• Social Security Number (Rare): For sole proprietors without an EIN, an SSN has historically served as an importer number, but using an EIN is recommended to limit personal exposure.

Who Uses The Importer Number

Several parties rely on the importer number during import processing:

• Importers: Use it to receive duty bills, entry summaries, and CBP notices.
• Customs Brokers: File entries and entry summaries in ACE that must include the correct importer number.
• Carriers And Freight Forwarders: Reference the number on arrival notices and cargo release instructions.

Practical Example

A U.S. retailer imports consumer electronics through a port of entry. The customs broker files the entry and includes the retailer's EIN as the importer number. CBP uses that identifier to issue the duty assessment and to record compliance history. If the retailer later faces a post-entry audit, auditors will pull records tied to that importer number.

Common Problems And How To Avoid Them

Errors with importer numbers create clearance delays and financial exposure. Typical issues and mitigations include:

• Incorrect Number Format: Confirm the EIN or CBP number format with your broker before filing.
• Using A 3PL/Agent’s Number Incorrectly: Only list a third party as importer of record when the third party is contractually the IOR—the party taking legal responsibility.
• Foreign Importers Without A Number: Apply for a CBP-assigned importer number or obtain a U.S. EIN if permanent U.S. activity is anticipated.

Best Practices For Warehouse And Logistics Teams

Warehouse operations and inbound logistics should treat the importer number as a primary reconciliation field. Record it on advance ship notices (ASNs), cross-dock manifests, and receiving records. Ensure your Warehouse Management System (WMS) and Transportation Management System (TMS) can store and validate importer numbers to prevent mismatches at filing.

In short, the Importer of Record Number is the identifier CBP uses to assign legal and financial responsibility for a U.S. import entry. Accurate use of that number reduces release delays, clarifies liability, and supports compliant trade operations.