What Is ISF (10+2)?

The Importer Security Filing (ISF), commonly called "10+2", is a U.S. Customs and Border Protection (CBP) regulation requiring importers and carriers to electronically submit specific shipment data before goods arrive in the United States by ocean vessel.

The "10+2" name refers to the 10 data elements required from the importer (or their customs broker) and 2 data elements required from the ocean carrier.

ISF was introduced as part of the SAFE Port Act to improve cargo security and allow CBP to assess risk before shipments reach U.S. shores. For more details, see the official CBP ISF guidance.

Do You Need to File an ISF?

You must file an ISF if:

Your goods are arriving by ocean vessel (containerized or break-bulk)
Cargo is entering a U.S. port (including Puerto Rico and U.S. Virgin Islands)
Shipment is destined for the U.S. (not just transiting or transshipping)

Exemptions: ISF is not required for goods arriving by air, truck, or rail. It also does not apply to certain bulk cargo, FROB (foreign cargo remaining on board), or immediate exportation entries.

De minimis note: Even shipments under $800 using Section 321 de minimis still require ISF filing.

Step-by-Step: How ISF Filing Works

1

Gather Required Information

Collect the 10 ISF data elements from your supplier, freight forwarder, and internal records (see checklist below).
2

Appoint a Filing Agent

Most importers use a licensed customs broker or freight forwarder to file on their behalf. You can also file directly if you have ACE (Automated Commercial Environment) access.
3

Submit ISF at Least 24 Hours Before Loading

The ISF must be transmitted to CBP at least 24 hours before cargo is loaded onto the vessel at the foreign port. Late filings result in penalties.
4

Update ISF if Information Changes

Amendments can be made up to 24 hours before arrival at the U.S. port. After that, changes require special CBP notification.
5

Receive Confirmation

Once accepted by CBP, you'll receive an ISF confirmation. This does not guarantee entry clearance, but confirms data has been received.
6

File Customs Entry Upon Arrival

ISF is separate from formal customs entry. You (or your broker) must still file the entry summary and pay duties/fees upon arrival.
7

Maintain Records for 5 Years

CBP requires you to retain ISF documentation and supporting records for 5 years from the date of entry.

What It Costs & Typical Timelines

ISF Filing Fees

Broker/Filing Fee: $40–$75 per ISF (varies by provider and volume)
CBP Fee: No direct CBP charge for ISF submission (but penalties apply for non-compliance)
Amendment Fee: $15–$30 per ISF correction (if required before arrival)

Typical Timeline

Purchase Order to ISF Data Availability: 1–7 days (depends on supplier responsiveness)
ISF Filing Turnaround: Same day to 24 hours (once data is received)
CBP Processing: Immediate (automated acceptance or rejection)
Vessel Transit Time: 10–40 days (Asia to U.S. West Coast ~14 days, Europe to U.S. East Coast ~10 days)

Required Documents & Data Checklist

The 10 ISF data elements you must provide:

1. Manufacturer (or Supplier) Name & Address
2. Seller Name & Address (if different from manufacturer)
3. Buyer Name & Address (the U.S. importer or owner)
4. Ship-To Party Name & Address (delivery destination)
5. Container Stuffing Location (where cargo was loaded into container)
6. Consolidator Name & Address (if applicable; "N/A" if direct shipment)
7. Importer of Record Number (EIN, SSN, or CBP-assigned number)
8. Consignee Number(s) (if different from importer)
9. Country of Origin (where goods were manufactured)
10. Commodity HTS Number (6-digit minimum)

Note: The ocean carrier is responsible for submitting the "+2" elements: stow plan and container status messages.

Risks & Common Mistakes

❌ Filing Too Late

Submitting ISF less than 24 hours before vessel loading results in automatic $5,000 penalty. Set internal deadlines 48+ hours before departure.

❌ Inaccurate Manufacturer/Supplier Data

Listing "unknown" or placeholder addresses is non-compliant. Work with your supplier early to get accurate facility details.

❌ Wrong HTS Classification

Using an incorrect 6-digit HTS can trigger CBP scrutiny. Classify carefully or request a binding ruling for ambiguous goods.

❌ Not Updating ISF When Details Change

If container stuffing location, ship-to address, or other data changes after initial filing, you must amend the ISF promptly.

❌ Assuming Freight Forwarder Will File Automatically

Clarify who is responsible for ISF filing in your service agreement. As the importer, you are liable for penalties even if a third party files on your behalf.

Get Expert ISF Filing Help

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Frequently Asked Questions

Do I need ISF for air shipments?

No. ISF is only required for ocean vessel imports. Air cargo has different advance data requirements (eAPIS).

Can I file my own ISF without a broker?

Yes, if you have ACE (Automated Commercial Environment) access and technical capability. Most importers use a broker to ensure accuracy and save time.

What happens if I miss the 24-hour deadline?

CBP may issue a $5,000 penalty, and in some cases, place a hold on your cargo. Repeated violations can result in increased scrutiny on future shipments.

Is ISF the same as a customs entry?

No. ISF is separate from the formal customs entry (CBP Form 7501 or Type 86 for de minimis). You still need to file entry paperwork and pay duties upon arrival.

Do de minimis shipments (under $800) require ISF?

Yes. Even Section 321 shipments arriving by ocean must have an ISF filed 24 hours before loading.

How to File an ISF (10+2) for U.S. Ocean Imports

TL;DR — Quick Summary