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Customs Entry Type 21 vs 01: Which Form 7501 Box Fits Your Shipment

Pick the wrong two-digit code in box 2 of CBP Form 7501 and the error follows the shipment for years: the entry liquidates on the wrong footing, refunds get computed against the wrong baseline, and protests start from a hole. Yet the two most consequential entry types are also the plainest pair to keep straight once you see the single question they answer: does CBP get paid now, or later? This guide walks the 01-versus-21 decision the way a filer experiences it — what each code obliges, what the regulations actually say, and where the money sits in each case. Confirm the ten-digit classification itself with our step-by-step HS lookup workflow, and keep the landed-cost duty calculator open to price either path.

Two codes, two moments when CBP gets paid

Entry type 01 is the consumption entry: goods enter U.S. commerce on arrival, estimated duty is deposited with the entry summary, and the transaction is economically closed once CBP releases the cargo. Entry type 21 is the warehouse entry: the same Form 7501 machinery places the goods into a CBP-bonded warehouse instead, where they rest at the importer's expense and risk while duty remains unpaid. Part 144 of 19 CFR opens by stating exactly this design — articles subject to duty may be entered for warehousing, deposited at the owner's expense and risk, and withdrawn for consumption upon payment of duties and charges (19 CFR 144.0, implementing 19 U.S.C. 1557).

The commercial meaning is straightforward. A type 01 entry buys certainty: the rate is fixed at entry and the goods are free to move. A type 21 entry buys optionality: duty is deferred, and the goods can later be withdrawn for consumption, exported outright without payment of duty, transported in bond to another port, or transferred to another bonded warehouse — the four outcomes 19 U.S.C. 1557(a)(1) enumerates. What the statute does not freeze is the rate itself, which is where importers get surprised.

The official entry-type map, and where 21 sits

CBP publishes the valid two-digit entry types and the channels that accept them. Most commercial traffic files electronically in ACE; a small residue must still be filed on paper at a local port. The warehouse family spans several related codes, which is why type 21 rarely travels alone in a filer's workflow:

Five legacy types remain paper-only (non-ABI): 04 (Appraisement), 05 (Vessel Repair), 24 (Trade Fair), 25 (Permanent Exhibition), 33 (Aircraft and Vessel Supply (For Immediate Exportation)). Everything in the warehouse chain beyond the initial deposit rides on its own code: 22 for re-warehousing, and 31/32/34/38 for withdrawals for consumption, quota, antidumping-countervailing duty, or combinations thereof.

What a type 21 entry obliges you to do

Warehousing is not a default state; the regulations fence it in. Eligibility comes first: any merchandise subject to duty may be entered for warehouse except perishables and explosive substances other than firecrackers (19 CFR 144.1(a)). The entry summary itself must be executed on Customs Form 7501 or its electronic equivalent, including the statistical information of 19 CFR 141.61(e), and the importer must designate on it the specific bonded warehouse receiving the goods (19 CFR 144.11(b)-(c)). While in bond, withdrawals may be made only by the party primarily liable — the importer of record on the warehouse entry, an actual owner who has filed the superseding declaration and bond, or a transferee of the withdrawal right (19 CFR 144.31). Even the minimum chunk matters operationally: absent special authority, goods may not be withdrawn in quantities less than an entire package, or below one ton for bulk (19 CFR 144.33).

Duty math: locked quantity, floating rate

The single most misunderstood clause in the warehouse chapter is the valuation moment. Under 19 U.S.C. 1557(a)(1), bonded merchandise may be withdrawn for consumption upon payment of the duties and charges accruing thereon at the rate of duty imposed by law upon such merchandise at the date of withdrawal — within five years of importation, or longer with CBP's discretionary approval for good cause. In other words, a type 21 entry locks the quantity and identity of the goods, but the duty rate floats until you pull the trigger. If you need a refresher on how ad valorem, specific and compound rate types behave, that primer covers the structures behind both codes.

To calibrate what those percentages mean in dollars, here are representative Column 1 general rates for common trade lanes:

Erga omnes (Column 1 general) rates as read from the HTS snapshot dated 20 October 2026. Verify preferential or trade-remedy overlays for your origin before filing.

Suppose a $40,000 shipment of lithium-ion batteries (HS 8507.60.00) arrives in October 2026 and you are unsure which market channel will absorb it within the year. Entered under type 21, no duty is deposited at entry; the goods sit in the bonded warehouse at your expense and risk. When you withdraw them for consumption, the applicable duty is the rate in force on the date of withdrawal. At today's snapshot rate of 3.4%, withdrawing the lot immediately would cost $1,360.00. If the line had moved up by 2.0 points to 5.4% by the time you withdraw, the same lot would owe $2,160.00 — a difference of $800.00 purely from timing, before storage fees. The arithmetic cuts both ways: a deferral only pays when the value of holding the cash (or the odds of exporting rather than consuming) exceeds warehousing costs plus any adverse rate movement.

Costs that do not pause: fees, storage, and general-order risk

Deferring duty is not deferring cost. Storage, cartage and labor charges accrue under the warehouse proprietor's tariff from day one, and the merchandise processing fee regime continues to apply to formal entries — CBP's published fee guidance puts the ad valorem MPF at 0.3464 percent of entered value for formal entries, subject to the per-entry maximums and exemptions tracked in our MPF and HMF entry-fee guide. Then there is the failure mode at the far end of the pipe: merchandise that is never entered, or entered incompletely, falls into general order custody, and the general order period expires six months from the date of importation (19 CFR 127.4). Goods left in a bonded warehouse beyond the five-year period with duties unpaid are deemed involuntarily abandoned (19 CFR 127.12(a)(2)), though anything subject to sale may still be entered or withdrawn for consumption before the auction, upon payment of duties, taxes and accrued charges (19 CFR 127.14(b)).

Choosing between 01 and 21: a decision sequence

Run the decision in this order. First, destination: if the goods are certain to enter U.S. commerce promptly and no rate change is in play, file 01 and be done — warehousing would only add storage cost. Second, export probability: if a real fraction of the lot may be re-exported, the duty-free withdrawal for exportation path makes 21 genuinely valuable, because duty never attaches to the exported portion. Third, timing options: if the goods must wait on a quota window, an admissibility ruling, or a buyer, 21 holds them legally and safely in the meantime. Fourth, price the carry: warehouse rent plus fees versus the financing value of deferred duty — and remember the rate floats, so a scheduled increase cuts the deferral's value while a scheduled cut rewards waiting. Finally, mind the paperwork adjacent to the entry itself: special programs under Chapter 98 special classifications and correct classification interact with the entry-type choice more often than newcomers expect.

Frequently asked questions

What is entry type 21 on CBP Form 7501?

Entry type 21 is the warehouse entry: merchandise subject to duty is deposited in a CBP-bonded warehouse without paying duty at entry. Duty becomes due when the goods are withdrawn for consumption, at the rate in force on the withdrawal date.

What is entry type 01 used for?

Entry type 01 is the standard consumption entry for goods entering U.S. commerce immediately. Estimated duties, taxes and fees are accounted for at entry, and the goods move straight to their destination after release.

How long can merchandise stay in a bonded warehouse?

Under 19 U.S.C. 1557(a)(1), merchandise may remain in bond for up to five years from the date of importation, or longer where CBP permits on a properly filed request showing good cause.

Which duty rate applies when goods leave a bonded warehouse?

The rate imposed by law at the date of withdrawal, per 19 U.S.C. 1557(a)(1). A warehouse entry therefore locks the quantity but not the rate: if the schedule changed while goods sat in bond, the withdrawal-date rate governs.

Do fees apply to warehouse entries?

Yes. Merchandise processing fees apply to formal entries, and warehouse rent, moving and labor charges accrue while goods are stored. Fees and charges are separate from the duty calculation and survive even when the duty rate itself is Free.

When is a warehouse entry the better choice?

When re-export is plausible, when cash flow favors deferring duty, or when goods await quota, admissibility decisions or a buyer. Purely domestic-bound shipments that clear immediately are cheaper and simpler under a type 01 consumption entry.