ISF Filing Deadlines: The Rules Every Importer Needs to Know
For anyone bringing cargo into the US by ocean freight, the Importer Security Filing (ISF, commonly known as '10+2') ranks among the most important — and most commonly missed — compliance obligations out there. CBP can levy a penalty as high as $5,000 per violation for a filing that's late, inaccurate, or never submitted. Here's what the ISF actually is, when it's due, and how to make sure it never slips through the cracks.
What Is the ISF (10+2)?
The Importer Security Filing obligates importers (or their licensed broker) to send CBP a defined set of shipment data before cargo gets loaded onto a vessel headed for the US. The '10+2' nickname comes from the fact that importers supply 10 data elements while carriers supply 2 more.
The 10 elements from the importer's side cover the seller, buyer, importer of record number, consignee number, manufacturer, ship-to party, country of origin, HTS number, container stuffing location, and consolidator. With this information, CBP can evaluate security risk well before the vessel ever reaches US waters.
When Is ISF Due?
Filing must happen no later than 24 hours before the cargo is loaded onto the vessel at the foreign port — not 24 hours before it arrives in the US, but 24 hours before it even departs the origin port. This distinction trips up plenty of first-time importers.
Shipments that pass through Canada or Mexico by rail or truck before entering the US by water may follow different timing rules. Have your broker verify the precise cutoff that applies to your specific route.
What Happens If You Miss the Deadline?
A late filing can draw liquidated damages of $5,000 per violation from CBP, with another $5,000 possible for a filing that's inaccurate or incomplete — so a single shipment handled poorly could face $10,000 in combined penalties.
Money aside, CBP also has the power to issue 'Do Not Load' orders that stop your cargo from being loaded in the first place, or to hold it for inspection once it arrives — either of which means costly delays.
How Advante Handles ISF for You
ISF filing comes standard with every ocean shipment we manage — it's not a separate charge or an extra step on your end. We gather the needed data during intake and submit it straight to CBP through our ABI connection.
We also keep an eye on vessel departure schedules as they happen, so if a sailing date shifts, we double-check that your ISF is still accurate and compliant well before the cutoff.
The ISF may be a small form, but the penalty exposure behind it is anything but small. The upside: once a broker is handling it properly and consistently, it stops being something you need to think about. If you're currently filing ISF on your own, or aren't confident it's being done right, reach out to one of our licensed brokers today.