An Extension of Liquidation is a CBP-initiated extension of the standard 314-day liquidation deadline. Under 19 U.S.C. § 1504(b), CBP may extend liquidation for up to four additional one-year periods — a maximum of approximately five years from the date of entry before deemed liquidation occurs.
Statutory grounds for extension:
- Information needed by CBP for proper liquidation is not available
- The importer or surety requests the extension and shows good cause (rarely granted)
- Liquidation is suspended by statute or court order (typically triggers suspension of liquidation instead)
Notice requirements. When CBP extends liquidation, it must provide written notice to:
- The importer of record
- The customs broker (when one is on the entry)
- The surety on the entry bond
Notice is generally issued through ACE, and the bulletin notice appears in the importer's CBP account.
Common scenarios for extension:
- Pending classification or value disputes (binding ruling requests, audits)
- Pending verification of preference program claims (USMCA, GSP)
- Pending laboratory analysis or partner government agency review
- Pending post-summary correction processing
Importer's options. If an importer disagrees with an extension or its underlying basis, options are limited until a final liquidation occurs. The importer cannot protest an extension itself, but can protest the underlying liquidation when it eventually issues. Extension determinations have been upheld in CIT decisions including Travenol Laboratories, Inc. v. United States and Sunline Trading Inc. v. United States.
Extensions paired with reconciliation are common — the importer flags entries for future review while preferential treatment, value adjustments, or origin determinations are finalized.