Customs & Tariffs · Free Tool

Duty Deferral Calculator

A CBP-bonded warehouse lets you hold imported goods without paying duty until you withdraw them — and never pay it at all on anything you re-export. This calculator separates the three savings that get conflated in every sales pitch, so you can see which one is actually driving your number and whether the bonded premium is worth paying.

Why this matters more in 2026. The Section 122 surcharge lapsed at 12:01 a.m. on 24 July 2026 and new Section 301 forced-labor duties of 10% or 12.5% took effect the same morning across roughly 60 trading partners, cumulative with existing duties and with AD/CVD. Goods already subject to Section 232 — steel, aluminum, copper, vehicles and parts, wood products, semiconductors — are carved out. Higher stacked rates make the duty cheque at the border bigger, which makes every month of deferral worth more, and makes withdrawal timing a live decision rather than a formality.

Customs value of the shipment or lot you would place in the warehouse.
MFN + Section 301 + Section 232 + AD/CVD combined. Since 24 July 2026 most origins carry an added 10% or 12.5% forced-labor Section 301 layer on top of whatever they already paid.
19 CFR 19 allows up to 5 years (60 months) from the date of importation.
Bonded goods can be withdrawn in partial lots, and duty is only assessed on what actually leaves.
Duty on this portion is never paid at all — this is usually the largest single number on the page.
Your line-of-credit rate, factoring rate, or internal hurdle rate — whatever the duty cash would otherwise be doing.
Only the extra cost. If you were going to warehouse the freight anyway, that base rent is not a deferral cost — enter the difference, or 0 if there is none.
Harbor Maintenance Fee is assessed on arrival and is not deferrable.
Net benefit of bonding this cargo
$1,688
Duty permanently avoided plus the carrying cost saved on deferred duty, less the bonded storage premium. That is 3.0% of the $56,864 you would otherwise have handed CBP at the border.
Cash not paid at the border
$56,864
Duty + MPF that would be due on day one if you entered for consumption instead.
Duty permanently avoided
$0
No re-export entered. If any share of this cargo leaves the U.S. again, that duty disappears entirely.
Carrying cost saved
$1,688
$56,250 of duty deferred an average of 3.0 months at your cost of capital.
Bonded storage premium
$0
The extra you pay for bonded space over plain warehousing across the full period.

Line detail

Total duty at the stated rate$56,250.00
Merchandise Processing Fee (0.3464%, capped)$614.35
Harbor Maintenance Fee (0.125%)$312.50 — due on arrival either way
Duty on the portion entering U.S. commerce$56,250.00
Average deferral period3.0 months
The risk this model does not price

Duty on warehoused goods is assessed at the rate in effect on the date of withdrawal for consumption, not the date of importation. That cuts both ways. If a rate falls while your cargo sits — an expiring action, a successful court challenge, an exclusion — you withdraw at the lower rate and the deferral was worth far more than the carrying cost above. If a rate rises, you pay the higher one. In a year where layers have been added and removed repeatedly, treat the number above as the floor of a range, not a point estimate. Re-export duty savings are the only part of this that is rate-proof.

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Three different savings, three different sizes

Bonded warehouse pitches usually quote the biggest available number — the full duty bill — as if it were money saved. It is not. Only one of these three is money you keep permanently.

01

Duty permanently avoided

Anything re-exported directly from bond never enters U.S. commerce, so duty and MPF are never assessed. Not refunded later — never paid. For importers who split a lot between domestic and foreign customers, this line alone usually dwarfs everything else on the page.

02

Carrying cost on deferred duty

Duty you do not pay until withdrawal is duty that stays in your business. Value it at whatever that cash would otherwise earn or cost — a revolver rate, a factoring rate, or your internal hurdle rate. This is a real, bankable saving, but it is a percentage of a percentage, so it is smaller than importers expect.

03

Working capital at the border

The full duty plus MPF not handed to CBP on arrival day. This is not profit — you will pay most of it eventually — but for a seasonal importer clearing a large pre-season buy, it can be the difference between financing the container and not.

When duty deferral is the wrong tool

Fast-moving cargo that ships out within days of arrival — the deferral window is too short to matter and the extra handling is not free.
Low-duty-rate goods. At a 3% blended rate, six months of deferral on a $250,000 lot saves a few hundred dollars in carrying cost. The math needs a meaningful rate to work.
Situations where you need to manipulate, repack for retail, or manufacture. Bonded warehouses permit only limited operations; substantial transformation belongs in an FTZ.
Importers who cannot tolerate rate-timing risk. If a layer might be added to your HTS code before withdrawal, deferral can cost you rather than save you.

Frequently asked questions

What is duty deferral?

Duty deferral means legally postponing payment of import duty. When goods are admitted to a CBP-bonded warehouse under 19 CFR 19, no duty, tax, or Merchandise Processing Fee is assessed at arrival. Duty becomes payable only when the goods are withdrawn for consumption into U.S. commerce — which can be up to five years after the date of importation. If the goods are re-exported directly from the bonded warehouse instead, the duty is never assessed at all.

How much can duty deferral actually save?

There are three separate savings, and they are very different sizes. Duty permanently avoided on any re-exported portion is 100% of the duty on that share — the largest number for most importers who do it. Carrying cost saved on deferred duty is the duty amount multiplied by your cost of capital and the deferral period, so $100,000 of duty deferred six months at a 12% cost of capital saves about $6,000. Cash freed at the border is the full duty plus MPF you do not hand CBP on day one — a working capital benefit rather than a profit-and-loss saving.

What duty rate applies when goods leave a bonded warehouse?

The rate in effect on the date of withdrawal for consumption, not the rate in effect when the goods were imported. This is the single most important mechanic of bonded storage and it cuts both ways. If a tariff layer expires or is struck down while your cargo sits, you withdraw at the lower rate. If new layers are added, you pay the higher rate. In 2026, with Section 122 having expired on 24 July and new Section 301 forced-labor duties of 10% to 12.5% taking its place the same day, this timing exposure has been unusually large in both directions.

How long can goods stay in a bonded warehouse?

Up to five years from the date of importation under 19 CFR 19. Goods can be withdrawn in partial lots at any point during that window, and duty is assessed only on the quantity actually withdrawn. Goods not withdrawn within five years are considered abandoned and may be sold by CBP.

Is a bonded warehouse better than a Foreign Trade Zone?

They solve overlapping but different problems. A bonded warehouse is simpler to use, has no zone application process, and is ideal for straight storage, deferral, and re-export. An FTZ allows manufacturing and substantial transformation inside the zone, permits weekly entry filing that can dramatically reduce Merchandise Processing Fee totals for high-entry-count importers, and allows inverted-tariff relief where the finished good carries a lower rate than its components. If you are only storing, deferring, and re-exporting, a bonded warehouse is usually the lighter-weight answer.

Do re-exported goods pay any duty at all?

No. Goods re-exported directly from a CBP-bonded warehouse without entering U.S. commerce never incur duty or Merchandise Processing Fee, because they are never entered for consumption. This is different from duty drawback, where duty is paid first and then refunded — drawback requires filing, documentation, and a wait. Re-export from bond avoids the outlay entirely, which is why importers who split lots between U.S. sale and foreign sale often see the strongest case for bonding.

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