Bonded warehouse vs CFS vs IBEC: storage time limits explained (5 years vs 15 days vs 20 days)

Ask three importers where their cargo sits between the vessel and the final buyer, and you may get three different answers: a bonded warehouse, a container freight station (CFS), or an IBEC consolidation facility. All three hold goods that are under customs control, and from the outside they can look like the same thing — a warehouse near the port. But they operate under very different rules, and the clearest way to see the difference is the clock.

• Class 11 bonded warehouse: imported goods can be stored for up to 5 years.
• Container freight station (CFS): cargo can remain for up to 15 days.
• IBEC consolidation: freight can be held for up to 20 days.

Those aren’t arbitrary numbers. Each limit reflects what the facility is designed to do, and choosing the wrong one for your cargo flow means either paying for capability you don’t need or scrambling to move freight before a deadline you didn’t plan around. Here’s how each works and when to use it.

The bonded warehouse: a 5-year runway for duty deferral

A Class 11 bonded warehouse is a secure facility where imported merchandise can be stored without duties being paid at the time of arrival. The goods remain under bond — in customs’ eyes, they haven’t formally entered U.S. commerce yet. Duty becomes payable when you withdraw the goods for domestic consumption; if you re-export instead, the goods can leave without that duty ever coming due.

The 5-year storage window is what makes this powerful. It turns the warehouse into a financial tool, not just a building:

• Cash-flow management. You defer duty until the goods are actually sold or needed, instead of paying a large duty bill the week a container lands.
• Timing the market. Seasonal goods, slow-turning SKUs, or inventory positioned ahead of demand can sit under bond until the moment is right.
• Re-export flexibility. For companies serving international buyers — common in Miami’s trade lanes — goods can be stored long-term and shipped back out without duty entering the equation.
• Breathing room during disputes or classification reviews. Five years is long enough that the storage clock is almost never your constraint.

Go Warehouse operates a Class 11 bonded warehouse in Miami, minutes from the Port of Miami and Port Everglades, with 24/7 security and on-site cameras — the physical controls that bonded status demands.

Best for: importers who want duty deferral, hold slow-turning or seasonal inventory, or may re-export some or all of a shipment.

The container freight station: 15 days to deconsolidate and move

A container freight station is built around one job: taking cargo out of containers and getting it moving. When your freight arrives as LCL (less-than-container-load) — sharing a container with other shippers’ goods — the container comes to a CFS, where it is stripped, sorted by consignee, and staged for customs release and pickup.

The 15-day limit exists because a CFS is a throughput facility, not a storage facility. Cargo is meant to arrive, clear, and leave. In practice, the workflow looks like this:

1. The container is drayed from the port to the CFS.
2. Freight is devanned and segregated by house bill.
3. Each consignee’s cargo awaits its customs release.
4. Released freight is picked up or dispatched onward.

For importers, the 15-day window is usually plenty — but only if documentation is in order. Delayed entries, exams, or missing paperwork eat into the clock quickly, and cargo that can’t move within the window needs to transfer somewhere that can legally hold it longer, such as a bonded warehouse. Having a container freight station and a bonded facility under the same roof, as Go Warehouse does, makes that transfer far simpler than trucking cargo across town between two providers.

Best for: LCL importers and freight forwarders who need containers deconsolidated quickly and cargo staged for prompt release and delivery.

IBEC consolidation: a 20-day window built for export flows

IBEC consolidation runs in the opposite direction. Instead of breaking inbound containers apart, an IBEC operation gathers export freight together — collecting cargo from multiple shippers or multiple purchase orders, holding it while the consolidation builds, and loading it for outbound movement.

The 20-day limit gives exporters and consolidators a slightly longer runway than a CFS, which reflects the reality of building consolidations: you’re often waiting on the last supplier’s freight to arrive before a container can be closed out. Twenty days is enough time to:

• Accumulate cargo from several origins into a single shipment
• Verify counts and condition as each lot arrives
• Complete export documentation
• Load the container or unit and dispatch it

Miami is one of the busiest gateways in the U.S. for trade with Latin America and the Caribbean, which makes IBEC consolidation a workhorse service here — freight from across the country funnels into South Florida, consolidates, and moves out through the nearby ports.

Best for: exporters and consolidators combining freight from multiple sources into outbound shipments through South Florida’s ports.

Side-by-side: choosing by cargo flow, not by label

A simple decision path:

1. Is the freight leaving the U.S.? IBEC consolidation, with its 20-day build window.
2. Is it inbound LCL that just needs to clear and go? CFS, planned around the 15-day limit.
3. Is it inbound cargo you want to hold, defer duty on, or possibly re-export? Class 11 bonded storage, where 5 years means the clock is effectively off the table.

Many importers use more than one. A single company might clear fast-moving LCL through the CFS, keep a duty-deferred reserve in bond, and consolidate exports through IBEC — which is exactly why a multi-service facility matters. Go Warehouse runs all three from one 100,000+ sq ft Miami facility at 3300 NW 110 Street, with U.S. customs support in-house, so cargo can shift between programs without leaving the building.

If you’re mapping out where your next shipments should land, tell us your cargo flow and volumes at gowarehouse.io/quote or call (786) 445-0150.

Frequently asked questions

What happens if my cargo exceeds the CFS 15-day limit?

Cargo that cannot clear and move within the CFS window needs to transfer to a facility authorized for longer holds, such as a Class 11 bonded warehouse where goods can remain for up to 5 years. Using a provider that operates both under one roof — as Go Warehouse does in Miami — avoids an extra drayage move and keeps the cargo under one operator’s control.

Do I pay import duties while goods sit in a bonded warehouse?

No. In a Class 11 bonded warehouse, duties are deferred while the goods remain under bond, for up to 5 years. Duty is paid when goods are withdrawn for U.S. consumption. If the goods are re-exported instead, they can leave without that duty being paid.

Is IBEC for imports or exports?

IBEC consolidation is an export-side service. It gathers freight from multiple shippers or purchase orders, holds it for up to 20 days while the consolidation is built and documented, and loads it for outbound shipment — a common flow through Miami given South Florida’s role as a gateway to Latin America and the Caribbean.