Where to file your tariff refund claim

You file a tariff refund claim with U.S. Customs and Border Protection (CBP), the federal agency that collected the duty. The specific office depends on where your goods entered the country. Most claims go through the port of entry listed on your entry documents, but CBP also accepts claims by mail to the address on your entry paperwork or through their online portal if you have an account with the Automated Commercial Environment (ACE).

If you imported through a customs broker, that broker can file the claim on your behalf — many do this as part of their service. You can also file the claim yourself if you have your entry number and the original entry documents. The port where you filed your entry is your starting point; CBP's website lists contact information for each port.

For most importers, the fastest route is filing through ACE if you have access, since CBP processes electronic claims faster than paper submissions. If you do not have ACE access, your customs broker can file electronically, or you can mail a paper claim to the port of entry.

Key Takeaways

  • Tariff refund claims go to the U.S. Customs and Border Protection port where your goods entered, either electronically through ACE or by mail with your original entry documents.
  • You have three years from the date of entry to file a claim, but filing sooner protects you if CBP later disputes the tariff rate or classification.
  • Your claim must include the entry number, the specific tariff code you believe was wrong, the correct code you are claiming, and documentation supporting the reclassification.
  • CBP typically takes 30 to 90 days to review a claim, though complex cases involving product testing or legal review can take longer.
  • If CBP denies your claim, you can appeal to the Court of International Trade, but this requires legal representation and carries filing fees.

What documents you need to gather before filing

Start by collecting your entry documents — the bill of lading, commercial invoice, packing list, and the CBP entry summary form (typically Form 3461 or 7501, depending on the type of entry). These documents show what you imported, the declared tariff code, and the duty paid. You will also need your entry number, which appears on your entry receipt and is essential for CBP to locate your shipment in their system.

Next, gather evidence that supports your claim for reclassification. This might include product specifications, technical drawings, material composition certificates, or expert opinions on how the product should be classified under the Harmonized Tariff Schedule (HTS). If you are claiming the tariff code was wrong because the product does not match the description in the code, documentation showing what the product actually is becomes critical — a lab report, manufacturer's specifications, or photographs with measurements.

If your customs broker handled the entry, ask them for copies of all entry documents and the broker's notes on how the tariff code was selected. Brokers often keep detailed records of their reasoning, which can strengthen your claim if you are arguing the code was misapplied rather than intentionally misclassified.

The tariff code reclassification argument

Your claim rests on showing that the tariff code CBP used at entry was incorrect and that a different code under the Harmonized Tariff Schedule should have been used instead. This is not about arguing the tariff rate is unfair — it is about proving the product was classified in the wrong category. For example, if you imported plastic containers and CBP classified them under the code for metal containers, you would argue for reclassification to the plastic code, which carries a lower duty rate.

To make this argument stick, you need to show how the product meets the criteria for the correct code better than it meets the criteria for the code CBP used. The HTS is organized by material, use, and function, so your evidence should address these factors. If the product is made of a different material than the code CBP chose assumes, say so and prove it. If it is used for a different purpose, document that use.

CBP applies something called the "General Rules of Interpretation" (GRI) when classifying goods. These rules prioritize the most specific code that fits the product. If you can show that a more specific code exists and your product fits it better, that strengthens your case. Many importers hire tariff classification consultants or customs attorneys to build this argument, especially for high-value shipments where the refund justifies the cost.

Filing the claim and what happens next

If you are filing electronically through ACE, you will submit your claim as a Protest or Claim for Refund (the terminology varies by port). Include your entry number, the original tariff code, the code you are claiming should have been used, and attach your supporting documentation as PDFs. CBP will send you a confirmation number and a projected review date.

If you are filing by mail, send your documents to the port of entry with a cover letter stating your entry number, the reason for the claim, and the tariff code change you are requesting. Keep copies of everything you send. Mail typically takes longer — CBP may not begin review for 30 to 60 days after receipt, whereas electronic submissions often begin review within two weeks.

After you file, CBP's Liquidation and Compliance branch reviews your claim. They may request additional information, contact you for clarification, or send your case to the port's tariff classification specialist if the code is disputed. This review phase typically takes 30 to 90 days, though cases involving product testing, expert review, or legal questions can stretch to six months or longer. CBP will notify you in writing of their decision.

What happens if CBP approves your claim

If CBP agrees that the tariff code was wrong, they will issue a Liquidation Adjustment or Refund Notice showing the corrected code, the recalculated duty, and the refund amount due to you. The refund covers the difference between what you paid and what you should have paid under the correct code. CBP will also refund any associated fees or penalties tied to the incorrect classification.

The refund is typically issued as a check mailed to your address on file, though some ports offer electronic payment if you have an account set up with CBP. Processing the actual refund check can take an additional 30 to 60 days after the approval decision, so plan for a total timeline of three to five months from filing to receiving your money. If the refund is large, CBP may require you to provide a corrected entry or amended documentation before releasing the funds.

Keep the refund notice for your records and for tax purposes — the refund may affect your cost basis for the imported goods or your business deductions, depending on how you account for tariffs.

What to do if CBP denies your claim

If CBP denies your claim, they will send you a written decision explaining their reasoning. This decision is not final — you have the right to appeal to the Court of International Trade (CIT), a federal court that handles customs disputes. However, appealing requires filing a formal complaint, and most importers hire a customs attorney to handle this because the process involves legal briefs, evidence presentation, and court procedures.

Before appealing to court, you can request that CBP reconsider their decision if you have new evidence or believe they misapplied the tariff rules. Send a letter to the port that denied your claim within 30 days of the denial, explaining what new information you have or where you believe CBP's reasoning was incorrect. This reconsideration request does not cost anything and sometimes results in CBP reversing their decision without going to court.

If you do appeal to the Court of International Trade, you will need to pay a filing fee (currently $1,000 to $2,000 depending on the claim amount) and attorney fees, which typically range from $5,000 to $25,000 or more depending on case complexity. Court cases can take one to three years to resolve. Most importers only pursue this route if the refund amount is substantial enough to justify the legal costs.

The three-year deadline and why it matters

You have three years from the date of entry to file a tariff refund claim with CBP. This deadline is firm — if you miss it, CBP will reject your claim and you lose the right to recover the overpaid duty. The entry date is the date CBP recorded your goods as entering the country, which appears on your entry receipt, not the date you received the goods or paid the invoice.

Filing early is strategically important even if you have time remaining. If you file within one year of entry, CBP must review your claim before the goods are "liquidated" — the point at which the entry becomes final and CBP's decision is locked in. After liquidation, challenging the tariff code becomes much harder and requires a different legal process. Filing within the first year gives you the strongest position.

If you discover a tariff misclassification years after entry, you can still file, but CBP will likely have already liquidated the entry. You will still be may have access to to the refund if you win, but the review process may be slower and more complicated. Keep your entry documents for at least three years so you can file if needed.

Frequently Asked Questions

Can my customs broker file the claim for me?

Yes. Most customs brokers can file tariff refund claims on your behalf as part of their service, and many do this routinely. You will need to authorize them in writing and provide them with any additional documentation supporting the reclassification argument. Ask your broker whether they charge a separate fee for this service or include it in their standard brokerage fees.

What if I paid duty on multiple shipments with the same misclassification?

You can file separate claims for each entry, or in some cases combine related entries into a single claim if they involve the same product and tariff code issue. CBP's rules on combining claims vary by port, so ask the port whether they prefer individual claims or a consolidated submission. Each claim still has its own three-year deadline from the date of entry.

How much does it cost to file a tariff refund claim?

Filing a claim with CBP itself is free. If you use a customs broker, they may charge a fee ranging from $200 to $1,000 depending on the complexity and whether they are filing electronically or by mail. If you hire a customs attorney or tariff consultant to build your reclassification argument, expect to pay $2,000 to $10,000 or more depending on the case.

What if CBP says the tariff code was correct but the rate changed after my entry?

Tariff rates can change due to trade agreements, new tariffs, or duty suspensions, but these changes typically apply only to future entries, not past ones. If a rate changed after your entry date, you generally cannot claim a refund based on the new rate. However, if a duty suspension or trade agreement retroactively applies to your entry, you may be able to file a claim — this is a specialized situation that requires consulting with a customs attorney.

How do I check the status of my filed claim?

If you filed through ACE, log into your account and search for your entry number — the system will show your claim status and any requests for additional information. If you filed by mail, contact the port of entry directly using the phone number on your entry receipt and provide your entry number. CBP can tell you whether your claim is under review, if they need more information, or if a decision has been made.