Bonded Warehouse: How It Works, Rules, Classes and Costs
A bonded warehouse is a customs-approved facility where imported goods are stored with the duty still unpaid. The importer pays when goods are withdrawn for sale in the US, and pays no US duty on goods withdrawn for export. We explain how goods move in and out, which warehouse classes exist, the rules that trip up ecommerce brands, what bonded storage costs, and when it pays.
Quick summary
- A bonded warehouse stores dutiable imports under a customs bond, and duty is paid only when goods are withdrawn for consumption in the US.
- Goods withdrawn for export leave without US duty, but a withdrawal for export to Canada or Mexico counts as a withdrawal for consumption.
- Goods can stay in bond for up to 5 years from the date of importation.
- Duty is charged at the rate in effect when the withdrawal is filed, so bond delays a tariff bill but does not lock in the rate from arrival day.
- Withdrawals come out a whole package at a time and repacking needs a CBP permit, so ecommerce orders ship from duty-paid stock, not straight from bond.
What a bonded warehouse is
A bonded warehouse is a building, or part of one, that US Customs and Border Protection (CBP) has approved to hold imported goods before duty is paid. The operator posts a customs bond and keeps the goods secure and exactly recorded, while the importer stays liable for the unpaid duty under 19 CFR part 144.
| Bonded warehouse | Standard warehouse | |
|---|---|---|
| Duty paid | When goods are withdrawn for consumption | At import |
| Goods allowed | Dutiable imports except perishables and explosives | Whatever the operator accepts |
| Leaving the building | Whole packages, on a customs withdrawal | Any quantity, any time |
| Repacking or relabeling | Only with a CBP permit | Freely |
| Time limit | 5 years from importation | None |
| Records | By customs entry, with at least a yearly inventory | By SKU, to the operator’s standard |
How goods move in and out of bond
- Entry for warehouse. The importer’s broker files a warehouse entry on CBP Form 7501 naming the bonded warehouse, instead of entering the goods for consumption.
- Transfer. The container is drayed from the terminal to the warehouse, where the goods stay until withdrawn.
- Permitted handling. Cleaning, sorting, repacking or relabeling needs a prior permit on CBP Form 3499; a blanket permit covers up to a year of repeated work.
- Withdrawal. Only the importer of record, the owner with a superseding bond, or a transferee can withdraw. A consumption withdrawal is filed on Form 7501 with the estimated duty deposited; an export withdrawal leaves in bond without US duty, except to Canada or Mexico.
- Time limit. Goods may stay up to 5 years from importation, and anything left then goes to general order disposal.
The duty rate is the one in effect when the consumption withdrawal is filed and the duty deposited, not the rate on arrival day, unless an executive order provides otherwise (19 CFR 141.69). A rate increase while goods sit in bond applies to them when they come out, and so does a cut.
Bonded warehouse classes
CBP designates classes 1 to 11 in 19 CFR part 19, with class 10 reserved. A brand storing imports deals with class 2 or 3 in almost every case, and any class 1 to 7 or 11 warehouse can also be designated class 8 for repacking work.
| Class | What it is |
|---|---|
| 1 | Government premises for examination, seizure or goods pending release |
| 2 | An importer’s private bonded warehouse, for its own goods |
| 3 | Public bonded warehouse, storage only, used by many importers |
| 4 | Bonded yards, sheds, pens and bulk liquid tanks |
| 5 | Grain bins and elevators |
| 6 | Manufacture in bond, solely for export |
| 7 | Smelting and refining |
| 8 | Cleaning, sorting, repacking or otherwise changing condition, not manufacturing |
| 9 | Duty-free stores |
| 11 | General order warehouses for unclaimed or unentered goods |
Running ecommerce inventory from bond
Bonded storage was built for cartons and pallets, and 4 of its rules collide with unit picking:
- Whole packages only. Goods cannot be withdrawn in quantities smaller than an entire box, bale or other package without special CBP authorization.
- Repacking needs a permit. Breaking cartons into smaller packages is manipulation, which needs the Form 3499 permit before work starts.
- Shortages are reported. A loss worth 1% or more of an entry’s value, or over $100 in duty and taxes, is reported immediately and confirmed in writing within 5 business days, and its duty is due within 20 days after the end of the month it was found.
- Stock is counted by entry. The operator takes at least a yearly physical inventory, or cycle counts covering every category once a year.
Choosing a bonded 3PL
The bond is the operator’s, but the duty liability is the importer’s, so the provider’s records protect the importer too.
When bonded storage pays
Bonded storage is the opposite of cross-docking at the port: it suits goods whose buyer is months away, not freight with a truck booked. Deferral alone is worth less than it looks:
Bonded storage pays for:
- Goods partly sold abroad, since duty on goods exported outside Canada and Mexico is never paid.
- Slow-moving, high-duty stock, where a large sum is deferred for months.
- Goods waiting on a buyer or a contract, which pay nothing until their market is known.
- Importers short on cash at arrival, who pay duty as goods sell rather than in 1 sum.
It is the wrong tool for fast-moving DTC stock sold within weeks, for low-duty goods, and for freight already sold and heading inland, which is better duty-paid at entry and transloaded near the port for the trip to the DC.
Re-export is where bond earns the most. Miami is the clearest case: goods landed from Asia or Europe can wait in bond there and ship on to Latin America or the Caribbean without US duty, and 3PLs in the Miami area differ in whether they run bonded space themselves or book it through a partner.
Frequently asked questions
What is the difference between a bonded and non-bonded warehouse?
The timing of the duty. Goods in a bonded warehouse are not yet duty-paid, and the importer pays when it withdraws them for consumption, while goods in a standard warehouse were duty-paid at import.
What are the disadvantages of a bonded warehouse?
The rules and the overhead. Goods leave only in whole packages on a filed withdrawal, repacking needs a permit, shortages must be reported, perishables are excluded and every movement is a broker filing.
Who owns a bonded warehouse?
It depends on the class. Class 1 premises are the government's, a class 2 warehouse is an importer's private facility, and a class 3 public warehouse is run by a warehouse company or 3PL for many importers.
How much does it cost to become a bonded warehouse?
The regulations in 19 CFR part 19 set no application fee. The costs are the customs bond, the physical security the CBP port director requires, fire insurance and a recordkeeping system that meets CBP's rules.
How long can goods stay in a bonded warehouse?
Up to 5 years from the date of importation, unless CBP allows longer on request and good cause. Goods still in bond after that are disposed of under the general order rules.
Who pays the duty on bonded goods?
The importer of record, who is liable for it as principal on the bond from the day the goods are entered for warehouse. It is paid at withdrawal, at the rate in effect when the withdrawal is filed.