The Importer Security Filing (ISF 10+2)
Importer Security Filing, commonly known as ISF 10+2, requires ocean importers to submit advance cargo data to CBP before vessel loading. Learn the requirements, timelines, and compliance risks.
Updated: February 27, 2026
Editor’s Note: This article has been updated to reflect current CBP enforcement practices, ACE filing requirements, and modern ISF compliance standards under 19 CFR Part 149.
What Is Importer Security Filing (ISF)?
Importer Security Filing, commonly referred to as ISF or “10+2,” is a U.S. Customs and Border Protection requirement that mandates the advance electronic submission of specific cargo data for ocean shipments destined for the United States.
ISF is governed by 19 CFR Part 149 and is designed to enhance supply chain security by requiring importers and carriers to provide data elements before cargo is loaded onto a vessel at a foreign port.
Why It Is Called “10+2”
The “10+2” designation reflects the number of required data elements:
- Ten data elements provided by the importer
- Two data elements provided by the ocean carrier
Importer-provided elements generally include:
- Seller
- Buyer
- Importer of record number
- Consignee number
- Manufacturer or supplier
- Ship to party
- Country of origin
- HTS classification (at the six-digit level)
- Container stuffing location
- Consolidator
Carrier provided elements include:
- Vessel stow plan
- Container status messages
ISF Filing Deadline Requirements
For most ocean shipments, the Importer Security Filing must be submitted at least 24 hours before cargo is laden aboard a vessel destined for the United States.
Certain data elements may be updated as more precise information becomes available, but initial filing must occur within regulatory timeframes to avoid penalties.
Late, inaccurate, or incomplete filings may result in:
- Monetary penalties
- Increased examination rates
- Cargo holds
- Compliance enforcement action
Current Enforcement Environment
While early ISF implementation involved phased enforcement and structured review periods, ISF is now fully enforced. CBP has the authority to assess penalties of up to $5,000 per violation for:
- Failure to file
- Late filing
- Inaccurate filing
Importers of record are ultimately responsible for ISF compliance, even when filing authority is delegated to a customs broker or freight forwarder.
Integrating ISF into Routine Operations
ISF compliance must be integrated into upstream supply chain processes. Because the filing deadline occurs before vessel loading, importers must obtain the required data from suppliers, manufacturers, and consolidators earlier than they would for traditional entry documentation.
An effective ISF compliance program includes:
- Clear supplier data collection procedures
- Defined internal timelines
- Standard operating procedures
- Ongoing monitoring of CBP acceptance messages
- Audit-ready documentation retention
ISF should not operate independently from customs entry strategy. Classification accuracy, importer-of-record alignment, and supply chain visibility all affect the compliance posture.
J.M. Rodgers’ ISF Compliance Approach
J.M. Rodgers provides structured ISF filing support aligned with current CBP regulatory requirements.
Our approach includes:
- Secure electronic data transmission
- ACE-compliant filing procedures
- Monitoring of ISF status and acceptance messages
- Amendment handling when required
- Integration with customs brokerage services
For clients utilizing our freight forwarding services, ISF data may be captured during the booking process, validated for accuracy, and transmitted within required deadlines.
We work collaboratively with clients to develop tailored ISF procedures that align with existing logistics workflows while maintaining full regulatory compliance.
Protecting Your ISF Compliance Position
Importer Security Filing is now a mature regulatory requirement with established enforcement standards. Importers should periodically review:
- Filing timeliness metrics
- Data accuracy rates
- Amendment frequency
- Internal control procedures
A proactive compliance review reduces enforcement exposure and ensures operational continuity.
If you would like to evaluate your current ISF compliance program or implement a structured filing solution, contact J.M. Rodgers to schedule a consultation.
Contact us today to discuss how we can support your Importer Security Filing compliance and integrate ISF into your broader customs strategy.