
Key Takeaways
Your container clears the port — but then comes the hold. The goods aren't fully fumigated and cannot enter U.S. commerce. Your customer decides to re-export back to origin rather than destroy the inventory.
Now your freight forwarder (FF) won't use their bond due to liability concerns, the steamship line (SSL) won't allow their carrier bond to be used either, and you're scrambling to find a bonded carrier just to move the shipment out of the country.
And somewhere in the middle of all that chaos, a real question gets buried: what happens to the import duties you already paid?
The short answer is that you may be able to get most of them back. The U.S. government operates a program called duty drawback — authorized under 19 U.S.C. § 1313 — that allows companies to recover up to 99% of import duties paid on goods that are subsequently re-exported or destroyed. Most importers have never filed a single claim.
Duty drawback is a refund of certain customs duties, internal revenue taxes, and fees collected upon importation, issued when those goods are later exported or destroyed. It's not a loophole — it's a core pillar of U.S. trade policy, designed to prevent American exporters from being penalized by import tariffs on goods that never actually enter domestic commerce.
The program is governed by 19 CFR Part 190 and has existed in various forms since 1789. It was significantly modernized by the Trade Facilitation and Trade Enforcement Act (TFTEA) of 2015, which expanded eligibility, simplified substitution rules, and introduced electronic filing requirements.
Despite its longevity and scale, an estimated $15 billion in eligible tariff refunds go unclaimed every year. Roughly 80% of eligible import refunds are never recovered — largely because qualifying companies don't know they're eligible, or because the traditional filing process is too manual and slow to be worth pursuing.
Drawback isn't a single program — it's a family of provisions, each covering a different scenario. Here are the most common:
This is the most straightforward type. If you import goods and then export them in the same condition — without having used them in U.S. commerce — you can claim a refund on the duties paid.
This applies even if you export different units than the ones you imported, as long as the goods are commercially interchangeable and share the same 8-digit Harmonized Tariff Schedule (HTS) code. That's the substitution provision under TFTEA, authorized by 19 U.S.C. § 1313(j)(2).
Example: A U.S. distributor imports 5,000 smartwatches, sells 4,000 domestically, and re-exports the remaining 1,000 to a retail partner in Canada. The duties paid on those 1,000 exported units are eligible for a customs refund.
This is the scenario most relevant to the fumigation and compliance nightmare described above. If imported merchandise:
...you may claim rejected merchandise drawback by re-exporting the goods or destroying them under U.S. Customs and Border Protection (CBP) supervision.
Example: A retailer imports a container of textiles that fail a material quality inspection. They arrange re-export back to the supplier and file for a refund of the duties paid on that shipment.
This is precisely the type of situation where importers leave money on the table. They're so consumed by the logistics of getting the goods out — dealing with bond issues, Immediate Export (I/E) filings, uncooperative SSLs — that the duty refund never enters the conversation.
If you import raw materials or components, incorporate them into a finished product through a U.S. manufacturing process, and then export the finished goods, you can recover the duties paid on those imported inputs.
Example: An Ohio-based auto parts manufacturer imports specialized microchips and steel alloys, assembles engine control units, and exports them to automakers in Mexico. The duties paid on the imported inputs are recoverable through manufacturing drawback.
This is often the most valuable type of drawback for manufacturers — and the most complex, typically requiring a drawback ruling from CBP that defines the relationship between imported inputs and exported outputs.
The concept is simple. The execution requires precision. Here's what the process looks like:
A note on deadlines: Generally, claims must be filed within the statutory time limits — typically within five years of the original import date. Don't assume you've missed the window for past shipments without checking.
If this program is so valuable, why does so much money go unclaimed? The traditional drawback process is genuinely difficult — and for most of its history, was only accessible to large enterprises.
Here's what the old model looks like:
The result: companies re-exporting goods, destroying inventory, or manufacturing for export are routinely leaving five-, six-, and sometimes seven-figure customs refunds on the table — not because they don't qualify, but because no one made it easy enough to actually claim.
Duty drawback automation changes that math entirely.
Duty drawback is fundamentally a combinatorial math problem — matching millions of import records to export records across different HTS classifications, accounting methods, and regulatory constraints to find the combination that maximizes the refund. Done manually, it's slow, error-prone, and leaves significant money uncaptured.
That's exactly the problem we built Zollback to solve.
Our co-founders, Elena Zhao (a Stanford PhD in combinatorial optimization and former CBP quantitative analyst) and Daniel Park (former Staff Engineer at Palantir, previously engineering lead at Descartes Systems Group), designed our platform from the ground up to handle the complexity of drawback at scale — without the manual overhead that makes it uneconomical for most companies.
Here's how we approach it differently:
We've processed over $10M in tariff refunds since launch — and we're accessible to companies of all sizes, including mid-market manufacturers and distributors that legacy providers have historically turned away.
Re-exporting goods — whether due to a fumigation hold, a quality rejection, unsold inventory, or a change in sales strategy — doesn't have to mean writing off the import duties you paid. A customs refund is often available, but only if you file for it.
If you're not sure whether your re-exports, returns, or manufacturing activity makes you eligible, a free drawback eligibility assessment can give you a clear answer and an estimate of what you could recover — with no commitment required. It takes about 30 minutes to find out if there's a meaningful refund waiting for you.
Duty drawback is a U.S. government program that provides a refund of up to 99% of customs duties paid on imported goods that are later exported or destroyed. It's designed to encourage U.S. exports by preventing companies from paying tariffs on goods that don't ultimately enter the domestic market.
Any U.S. company that imports goods and subsequently exports or destroys them may be eligible for a duty drawback refund. Common scenarios include re-exporting unused merchandise, returning defective goods, or exporting finished products made with imported components.
You generally have up to five years from the date of import to file a duty drawback claim. The goods must also typically be exported or destroyed within five years of importation. We can help you review past shipments to see if they fall within the statutory window for recovery.
You will need comprehensive records for both the import and export transactions. This typically includes the import entry summary (CBP Form 7501), commercial invoices, bills of lading, and proof of export or destruction. Our platform can ingest these documents in various formats to simplify the process.
We automate the entire drawback process, from data ingestion to claim filing. Unlike traditional manual methods that can take 9-12 months, our AI-powered platform processes claims in 10-15 working days. Our algorithmic optimization also helps maximize your potential refund, typically finding 15-20% more than manual approaches.
Our pricing is purely performance-based, meaning you only pay a percentage of the refund we successfully recover for you. There are no upfront fees, retainers, or subscription costs. This model ensures our service is accessible to businesses of all sizes, as you only pay when you receive a refund.
Yes, you can. This is known as "substitution" drawback. As long as the imported and exported goods are commercially interchangeable and share the same 8-digit Harmonized Tariff Schedule (HTS) code, you can claim a refund on the duties, even if the exported units are not the specific ones you imported.
You can receive your refund much faster with an automated process. While traditional drawback services often take nearly a year, our automated platform and direct electronic filing with U.S. Customs and Border Protection (CBP) means your first refund typically arrives in weeks, not months.