A customs bonded warehouse lets you store imported goods with duty deferred until you withdraw them for sale in the U.S., for up to five years. A Foreign Trade Zone (FTZ) is treated as outside U.S. customs territory, so goods can sit there indefinitely, duty can be reduced through inverted tariffs or eliminated on re-exports, and high-volume importers can consolidate entries weekly. A Container Freight Station (CFS) is not a duty tool at all: it is where consolidated (LCL) import containers are unloaded and cargo waits a short time for customs release. Pick a bonded warehouse for duty cash flow and uncertain final markets, an FTZ for high entry counts or production, and a CFS for LCL freight moving through.
All three sit under U.S. Customs and Border Protection (CBP) supervision, which is why they get confused. The difference is what happens to duty, how long goods can stay, and how much setup the importer carries. The sections below cover each structure, a side-by-side comparison, and a decision guide by importer profile.
What is a customs bonded warehouse?
A customs bonded warehouse is a building or secured area approved by CBP where imported merchandise can be stored without paying duty at the time of import. The warehouse operator posts a bond with CBP guaranteeing the duties and taxes on the goods inside, and every receipt and withdrawal is documented against a warehouse entry.
Classes of bonded warehouse
CBP recognizes several classes. For 3PL storage the most common is the Class 3 public bonded warehouse, operated by a third party that stores imported merchandise for many importers. Other classes cover premises owned by the government, private warehouses used by one importer, bonded yards or sheds for heavy and bulky goods, grain bins, manipulation warehouses, duty-free stores and smelting facilities. When you request quotes for bonded storage, you are almost always asking for Class 3 space.
How duty works in bond
- Duty is deferred, not waived. You pay when goods are withdrawn for consumption — that is, released into U.S. commerce.
- Goods can stay in bond for up to five years from the date of importation. Anything still in the warehouse after that is treated as abandoned to the government.
- If goods are exported or destroyed under CBP supervision instead of entering U.S. commerce, no duty is owed at all.
- You can withdraw in partial quantities, paying duty only on what you pull out. That is the cash-flow benefit: duty follows your sales instead of your container arrivals.
What you can and cannot do with goods in bond
Bonded warehouses are for storage, not production. Manufacturing is not allowed. Limited manipulation — cleaning, sorting, repacking or relabeling — is permitted only under CBP supervision and the applicable rules, typically in a warehouse approved for manipulation. Every unit must be traceable to its entry, so expect stricter receiving, lot control and inventory reconciliation than in a standard building.
Our customs bonded warehousing service covers how bonded storage is typically priced and which markets in our network have bonded capacity near major ports, including Southern California and New Jersey / New York.
What is a Foreign Trade Zone (FTZ)?
A Foreign Trade Zone is a designated, secured area that, for customs purposes, is treated as outside U.S. customs territory. Goods brought into a zone are admitted, not entered, so no formal customs entry or duty payment is required until merchandise leaves the zone for U.S. consumption. Zones are authorized by the Foreign-Trade Zones Board and operated under CBP supervision, often by port authorities, economic development agencies or private operators — including some 3PLs.
Why importers use FTZs
- Indefinite storage. There is no five-year limit; goods can remain in the zone as long as needed.
- Duty elimination on re-exports. Merchandise exported from the zone never pays U.S. duty.
- Inverted tariff savings. When a manufacturer in a zone with production authority uses imported components carrying a higher duty rate than the finished product, it can elect to pay the finished-product rate. That requires specific FTZ Board authorization for production.
- Weekly entry. Instead of filing a customs entry for every shipment leaving the zone, an operator can file one weekly entry. The merchandise processing fee (MPF) is capped per entry, so one weekly entry replaces dozens or hundreds of individual ones — a significant saving for importers with high shipment counts.
- Zone-to-zone transfers. Goods can move between zones without entering U.S. commerce.
- Waste and scrap. Duty is generally not owed on scrap or waste generated in the zone.
The trade-off: setup and ongoing compliance
FTZ benefits come with overhead. A company running its own zone or subzone needs FTZ Board approval, CBP activation of the site, an inventory control and recordkeeping system that meets CBP requirements, and annual reporting to the FTZ Board. Activation alone commonly takes months. That is why many importers use a 3PL operator whose site is already activated within a zone: the operator carries the activation, procedures and audits, and the importer pays for storage and zone services.
What is a Container Freight Station (CFS)?
A Container Freight Station is a CBP-bonded facility, usually near a port or airport, where consolidated import containers are devanned. An LCL (less-than-container-load) box carries freight for several importers; the CFS unloads it, separates each importer's cargo, and holds it until CBP releases it and the importer or its carrier picks it up. Exams can also take place there.
A CFS offers no duty deferral or reduction. It is a short-dwell facility by design. Cargo that is not entered within 15 calendar days of arrival risks being sent to a General Order warehouse, where storage is charged at the importer's expense and unclaimed goods can eventually be sold. CFS rates are usually structured around devanning, handling and daily storage after a short free period, so dwell time gets expensive quickly.
If you import LCL freight, the CFS is a step in the chain rather than a storage choice. Once cargo is released, it typically moves by truck to your 3PL — see our drayage and transloading service for how port freight is moved into storage.
Bonded warehouse vs. FTZ vs. CFS: side-by-side
| Factor | Customs bonded warehouse | Foreign Trade Zone | Container Freight Station |
|---|---|---|---|
| Duty treatment | Deferred until withdrawal for consumption; none if exported or destroyed | Not owed until goods leave for U.S. consumption; none on re-exports; possible inverted tariff savings | No benefit; normal entry and duty |
| Storage time limit | Up to 5 years from importation | No limit | Short dwell; 15 days before General Order risk |
| Manufacturing | Not allowed; limited supervised manipulation | Allowed with FTZ Board production authority | Not allowed |
| Entry filing | Warehouse entry, then a withdrawal per release | Admission; weekly entry option consolidates MPF | Standard consumption or in-bond entry |
| Best for | Duty cash flow, uncertain final market, possible re-export | High shipment counts, production, long-term or re-export inventory | LCL import cargo awaiting release |
| Typical cost profile | Premium over standard storage for bond, security and reconciliation | Zone service fees on top of storage; savings scale with volume | Devanning and handling fees, then daily storage after free time |
| Setup effort for the importer | Low when using a public bonded 3PL | High for own zone; moderate when using an activated 3PL site | None beyond normal customs brokerage |
| Oversight | CBP supervision; operator bond | CBP supervision; FTZ Board; annual reports | CBP supervision; bonded operator |
Which structure fits your import profile?
High-volume importer with many entries: FTZ
If you file hundreds of entries a year, weekly entry and capped MPF can save real money, and the inventory discipline an FTZ requires usually exists in your operation already. Manufacturers with inverted tariffs and companies with steady re-exports also lean FTZ. Start by asking whether a 3PL operator in your target market already runs an activated site before you commit to your own.
Uncertain final market or duty cash-flow pressure: bonded warehouse
If you are not yet sure whether goods will sell in the U.S., Canada, Mexico or elsewhere, a bonded warehouse lets you hold them without paying U.S. duty and decide later. It also suits importers who want duty to follow sales on slow-moving or seasonal inventory. A public bonded 3PL requires almost no setup on your side beyond your customs broker filing the warehouse entry.
LCL import cargo in transit: CFS, then regular or bonded storage
If you ship consolidated containers, you will pass through a CFS regardless. Plan the next leg: entry for consumption and delivery to a standard warehouse, or an in-bond move or warehouse entry into a bonded facility if you want to keep duty deferred.
Standard importer paying duty at arrival: regular 3PL warehouse
Many importers do not need any of these. If goods are sold domestically soon after arrival and duty is a modest share of landed cost, standard warehousing is simpler and cheaper. Our guide to matching warehouse type to product covers that decision.