US trade compliance: CBP entry, protests, and where the duty leaks
US trade compliance means every import correctly entered with US Customs and Border Protection through ACE — HTS classification, entered value, and origin — with the importer of record carrying legal liability and defined recovery routes: post-summary corrections, 19 USC 1514 protests, and duty drawback under 19 USC 1313. The US is the largest import market on earth, and CBP runs one of its most document-rich entry systems. Every entry summary, duty payment, and liquidation is on record — which means overpaid duty is provable, and recoverable, if it is caught inside the protest and drawback windows.
The four declarations every United States shipment depends on
1. Classification — the HTS code
US imports classify under the Harmonized Tariff Schedule of the United States (HTSUS), a 10-digit code that sets the duty rate — plus Section 301 and 232 measures where they apply. A supplier-suggested code carrying a higher rate leaks duty on every entry summary.
2. Valuation — the entered value
CBP expects transaction value: invoice price plus packing, assists, royalties, and proceeds, with international freight and insurance excluded where properly documented. Freight wrongly left in the entered value inflates duty, merchandise processing fee, and harbor maintenance fee together.
3. Origin — FTA preference and special programs
USMCA, and other preference programs, zero-rate qualifying goods where rules of origin are met and certification is valid. Preference never claimed is duty paid that did not need to be paid — recoverable through post-entry claims.
4. Admissibility — PGA filings and bonds
Partner government agencies (FDA, USDA, EPA, DOT) gate release, and every entry rides on a customs bond. A missing filing holds the container at the terminal — and a held box burns free time, which is where a compliance gap becomes a port invoice.
How a compliance gap becomes a recoverable overcharge
US trade compliance is usually framed as surviving CBP audits and avoiding penalties. The unaudited side is overpayment: an HTS code assessed at 6.5% where the correct code carries free or 2.5% is a leak on every entry summary, plus the fees computed on the inflated base. CBP itself hands you the recovery instruments — PSC, protest, drawback — but only if the error is found inside the windows.
| Where the error sits | What it costs | How it comes back |
|---|---|---|
| HTS code with a higher duty rate | Excess duty + MPF/HMF on every entry | PSC before liquidation, protest after |
| USMCA / FTA preference never claimed | Full duty instead of zero | Post-importation preference claim (19 USC 1520(d)) |
| International freight in entered value | Duty and fees paid on transport cost | Amended entry via PSC or protest |
| Broker filing error (code / value) | Duty drift you remain liable for | Corrective filing + refund claim |
| Exported or destroyed goods, duty unclaimed | Up to 99% of duty left with CBP | Duty drawback claim under 19 USC 1313 (5-year window) |
Suspect your US entries are overpaying?
Upload an ACE entry summary (7501) or broker invoice and the audit engine checks the HTS code, valuation basis and every fee line — flagging what is recoverable through PSC, protest, or drawback. No software to install, NDA signed before you send anything.
Frequently asked questions
What is a 19 USC 1514 protest?
The formal legal route to challenge a CBP decision — classification, valuation, or exclusion — after an entry has liquidated. It must be filed within 180 days of liquidation, and it is how overpaid duty is recovered once the entry is final.
How long do I have to recover overpaid US customs duty?
Before liquidation, a post-summary correction fixes the entry directly. After liquidation, a 19 USC 1514 protest must be filed within 180 days. Duty drawback claims under 19 USC 1313 allow up to 5 years from importation.
What is duty drawback?
A refund of up to 99% of duties, taxes, and fees paid on imported merchandise that is later exported or destroyed. Under the modernized drawback law (TFTEA, 19 USC 1313), substitution drawback allows matching exports to imports on a like-kind basis — and most eligible importers never file.
Who is liable for a broker’s filing error?
The importer of record. Licensed customs brokers prepare and file the entry, but CBP holds the importer liable for a wrong HTS code, entered value, or origin claim — broker errors land on your duty account.