INTERNATIONAL TRADE LAW
CBP Detention of Imports: The 30-Day Rule
A CBP detention is a temporary hold on imported merchandise while Customs decides whether the goods may enter — and by law it cannot drag on indefinitely. Under 19 U.S.C. § 1499, CBP must make an admissibility decision within set deadlines, and if it does not, the goods are treated as excluded, which gives you the right to protest. Knowing those deadlines turns a frustrating, open-ended hold into a process with leverage points you can use.
What a Detention Is
A detention is the step before any seizure. When goods arrive, CBP examines them and decides whether to release or hold. A hold for further review — to verify classification, value, origin, marking, or compliance with another agency’s rules — is a detention. The goods are not yet seized; ownership has not changed; CBP is simply taking time to decide. That distinction matters, because detention runs on a strict statutory clock, while seizure and forfeiture follow a different and longer track.
The Deadlines That Govern a Detention
Section 1499 and its regulation, 19 CFR 151.16, impose a timeline most importers don’t realize exists:
| Stage | Deadline | What it means |
|---|---|---|
| Decision to release or detain | Within 5 business days of presentation for examination | CBP must either release the goods or formally detain them |
| Notice of detention | Within 5 business days of the detention decision | CBP must tell you, in writing, that the goods are held and why |
| Final admissibility decision | Within 30 days of presentation | CBP must decide whether the goods are admissible |
| Deemed exclusion | After 30 days with no decision | The goods are treated as excluded — a protestable event |
The notice CBP sends should state the reason for the detention, the anticipated length, what testing or information CBP needs, and how you can move things along. If you receive a hold but no written notice, that itself is a problem worth raising.
Deemed Exclusion: Your Leverage Point
The most useful feature of § 1499 is the 30-day backstop. If CBP fails to make a final admissibility decision within 30 days of presentation, the law treats that silence as a decision to exclude the merchandise under § 1514(a)(4) of the Tariff Act. An exclusion — actual or deemed — is something you can protest. In other words, CBP cannot hold your goods in limbo forever; once the clock runs out, you gain a formal mechanism to force a decision and create a reviewable record.
This is why tracking the presentation date precisely is worth the effort. The 30-day point converts a passive wait into an active right.
Responding to a Detention
A few moves consistently shorten holds and protect your position:
- Respond fast and completely. Most detentions are about missing information — a value substantiation, a classification rationale, a marking fix, or another agency’s clearance. Giving CBP exactly what it asked for, in full, is the quickest route to release.
- Document the dates. Record the presentation date and the notice date; they define every deadline that follows and any deemed-exclusion argument.
- Fix admissibility problems where possible. Marking and labeling defects can often be cured under CBP supervision rather than ending in exclusion.
- Use the protest right. If the 30 days lapse or CBP excludes the goods, a timely protest puts the decision in front of CBP for formal review and preserves your path to the U.S. Court of International Trade.
If the detention escalates into a seizure or a proposed § 1592 penalty, the analysis shifts — those carry their own deadlines and defenses, summarized in our overview of CBP penalties.
Frequently Asked Questions
How long can CBP detain my goods? CBP must make a final admissibility decision within 30 days of presentation for examination. Past that, with no decision, the goods are deemed excluded and the hold becomes protestable.
What is the difference between detention and seizure? Detention is a temporary hold while CBP decides admissibility. Seizure is CBP taking legal custody because it has concluded the goods violate the law.
What is a “deemed exclusion”? If CBP misses the 30-day deadline, the law treats the inaction as a decision to exclude the merchandise — which you can challenge through a protest.
Can I do anything to speed up release? Yes. Detentions usually turn on information CBP needs. Providing complete records — value, classification, origin, and any other-agency clearances — promptly is the fastest path to release.
Goods detained at the port, or want to reduce detention risk? Reidel Law Firm prepares flat-fee import/export compliance memos and advises importers on customs detentions and admissibility with direct attorney access. Get an import compliance memo →
