Duty Drawback Calculator

The arithmetic

Duty drawback refunds duty paid on imported goods that are subsequently exported, destroyed, or used to manufacture something exported. The claim is the duty originally paid × the eligible proportion, less any statutory retention, commonly 99% is refundable.

The main categories are unused merchandise drawback, where the goods are exported in the same condition, and manufacturing drawback, where imported inputs go into an exported product. Substitution rules allow commercially interchangeable goods to be matched in many regimes.

How that looks in practice

Duty of $1,170 paid on the shipment. If 30% of those units are subsequently exported, the eligible duty is $351, and at 99% the claim is $347.

That looks small until it repeats. An importer bringing in $18,000 of goods monthly with a steady 30% export share has $4,164 a year of recoverable duty, and with a 25% additional tariff in play it becomes $20,000.

Claims can also be made retrospectively, commonly up to five years, which means a first claim can cover several years of past exports at once, and that first claim is frequently the one that pays for setting the process up.

Where this breaks down

Drawback requires tracing: proving that specific exported goods correspond to specific duty-paid imports. Without records linking them, the claim fails regardless of the underlying facts, and most businesses discover their records are inadequate only when they try.

Not all duty is refundable either. Some additional trade measures are specifically excluded from drawback in some regimes, which can remove exactly the duty that made the claim worth pursuing.

Making it useful

Check eligibility before assuming the duty is sunk. Any business that imports and also exports, including returns sent back to an overseas supplier, or sales to customers in other countries, may have a claim it has never considered.

Then set up the record-keeping prospectively even if the current volume does not justify a claim. Retrospective claims depend on records that exist, and the cost of keeping them is close to zero compared with the cost of reconstructing them.

Whether the administration is worth it

Drawback claims are documentation-heavy, and most businesses use a specialist who works on a contingency share of the recovery, typically 15% to 30%. That makes the decision close to risk-free, since no recovery means no fee.

The threshold at which it becomes worthwhile is usually a few tens of thousands of dollars of recoverable duty a year, which sounds high until additional tariffs are in play. Under a 25% measure, an importer exporting 30% of what they bring in reaches that on a fairly modest volume.

The other benefit is that the process forces the kind of import and export record discipline that pays off elsewhere: in customs audits, in landed cost accuracy, and in inventory reconciliation. Businesses that set it up for the drawback frequently find the records more useful than the refund.

Rejected merchandise drawback, which covers goods that did not conform to specification and were returned or destroyed. Importers who write off defective stock frequently pay duty on it and never reclaim.

Destruction has to be under customs supervision or otherwise evidenced to qualify, which means the process has to be arranged before the goods are scrapped rather than afterwards, a sequence that is easy to get wrong and impossible to fix retrospectively.