QUICK ANSWER US import customs clearance is the process CBP uses to review a shipment and release it into the country. In practice it runs on four things: the ISF filed before the goods sail, the customs entry filed by a licensed broker, the duty and fees paid to CBP, and the release once everything checks out. A clean, pre-filed shipment usually clears in a day or two; a document gap or an exam is what turns days into weeks.
The US import customs clearance process decides whether your container rolls off the terminal on schedule or sits racking up charges. Most of it is invisible when it goes right and expensive when it does not. This guide walks the steps, the players, the paperwork, and what to do when a shipment is held.
What US import customs clearance is
Customs clearance is the set of steps that gets imported goods legally admitted into the United States. Customs and Border Protection reviews who is importing what, how it is classified, what it is worth, and what duty it owes, then either releases the shipment or flags it for a closer look. It is a regulatory checkpoint, not a delay by design, and the operational side of it is the customs clearance work a forwarder coordinates on your behalf.
The customs clearance process, step by step
For an ocean import, clearance follows a fixed order, and most of it can happen before the vessel even arrives.
Step 1: ISF filed before loading
For ocean shipments, the Importer Security Filing goes to CBP at least 24 hours before the container is loaded at origin. Miss it or get it wrong and the penalty is $5,000 (CBP), which is why the ISF filing is the first clock in the process.
Step 2: The customs entry is filed
A licensed customs broker files the entry, declaring the goods under their HTS code, the customs value, and the country of origin. The current tariff schedule is published by the US International Trade Commission at hts.usitc.gov. The entry can be filed before arrival so release lines up with the vessel.
Step 3: Duty and fees are calculated and paid
CBP assesses duty at the HTS rate, plus any Section 301 tariff, plus the MPF and HMF fees. These are paid to CBP through the broker under the importer's customs bond.
Step 4: Release, or a hold
If the entry is clean and nothing is flagged, CBP releases the shipment and the container can be picked up. If something does not add up, the shipment is held or selected for exam, covered below.
Who is involved in customs clearance
Four parties touch every clearance, and knowing who does what tells you who to call when something stalls.
Who does what in customs clearance
| Party | Role |
|---|---|
| Importer of record | Legally responsible for the entry, the duty, and the data being correct |
| Freight forwarder | Coordinates the shipment and the documents, and keeps the timeline |
| Licensed customs broker | Files the entry with CBP and pays duty under the importer's bond |
| CBP | Reviews the entry and releases or examines the goods |
The forwarder and the broker are different roles, and the distinction decides who is liable for the filing. Who signs which document is spelled out in our freight forwarder vs customs broker guide.
Documents customs clearance needs
A clean document set is what keeps clearance fast. The core is small and consistent.
Core customs clearance documents
| Document | What it does |
|---|---|
| Commercial invoice | Declares the goods and the value duty is based on |
| Packing list | Details cartons, weights, and dimensions |
| Bill of lading | The carrier's contract and receipt for the cargo |
| ISF filing | The advance security data for ocean shipments |
| Arrival notice | Tells the importer the goods have arrived and are ready to clear |
How long customs clearance takes, and what changes it
With a clean, pre-filed entry, release often happens the same day the vessel arrives or within a day or two, and CBP can grant it before the ship docks. The transit is not the variable; the file is. Here is what each scenario typically does to the timeline.
Typical US customs clearance timelines
| Scenario | Typical time to release |
|---|---|
| Clean entry, filed before arrival | Same day to 2 days, often at vessel arrival |
| Document question, value or description mismatch | Adds 2 to 5 days |
| X-ray (VACIS) exam | Adds 1 to 3 days |
| Tailgate exam, doors opened and inspected | Adds 2 to 7 days |
| Intensive exam, full unpack at an exam station | Adds 1 to 3 weeks |
| Partner agency hold (FDA, USDA) | Days to weeks, until the agency requirement is met |
Four things decide which row you land on. When the entry is filed: pre-arrival filing lets release line up with the vessel, while filing after arrival starts the clock late. Data quality: a wrong HTS code, a vague description, or an invoice that does not match the declared value invites the document question or the exam. The importer's track record: established importers with clean histories draw fewer exams than first-time importers. And whether another agency regulates the goods, because a PGA hold runs on that agency's clock, not CBP's. Port congestion stretches every exam queue further. Clean paperwork filed early is the whole game, because clearance added to a slow file is measured in weeks, not hours.
What customs clearance costs
Clearance itself is a set of small, predictable charges, plus the duty, which is not.
What customs clearance costs
| Charge | Basis |
|---|---|
| Duty and Section 301 | HTS rate plus any China tariff, on the customs value |
| MPF | 0.3464% of value, 2026 min $33.58, max $651.50 per entry |
| HMF | 0.125% of value, ocean imports only |
| Continuous customs bond | Platton $375/year, below the typical $400 to $600 |
| Broker and clearance fee | Flat, per entry |
The MPF minimum and maximum reset each fiscal year (CBP). The duty is the line that moves the total, which is why classification and origin, not the clearance fee, are where the money is. The per-unit picture is in our landed cost guide.
What happens on a hold or exam
CBP can hold a shipment for a document issue or select it for an exam, from a quick document review to an X-ray or a full intensive unpack. You do not get to skip it, and the storage and handling charges accrue while the container waits. What each exam type involves and how to respond is covered in our customs hold and exam guide.
TAKEAWAY An exam is the expensive part of clearance, and most exams that turn into weeks trace back to a preventable file: a vague product description, a wrong HTS code, or a value mismatch. Clean paperwork filed before the vessel arrives is what keeps a routine hold from becoming a demurrage bill.
How Platton runs customs clearance for US importers
Clearance goes wrong in the gaps, a late ISF, a wrong code, a container nobody moves after release. Platton runs it on one file with the freight, so the gaps close.
ISF and entry filed on time, through licensed brokers
We collect the data and file the ISF before the 24-hour deadline, and the entry files through licensed customs brokers, pre-arrival, so release lines up with the vessel.
Classification reviewed before it files
Your HTS code and Section 301 exposure get checked through customs compliance review before the entry submits, not after CBP questions it.
The demurrage clock owned after release
Because clearance and drayage sit on one file, a released container actually moves before free time runs out, instead of waiting on a separate trucker.
One coordinator, one status
You get one person who knows where the entry stands, not a broker, a forwarder, and a trucker each holding a piece. Corridor-level detail for the main lane sits in our shipping from China to USA guide.
Get an itemized import quote with clearance included
Common Questions About Customs Clearance
What is the customs clearance process?
It is the sequence CBP uses to admit imported goods: the ISF is filed before the goods sail, a licensed broker files the customs entry declaring the classification and value, duty and fees are paid to CBP under the importer's bond, and the shipment is released or selected for exam. For ocean imports most of it can happen before the vessel arrives, so a clean file clears in a day or two.
How long does US customs clearance take?
With accurate paperwork filed before arrival, often same-day to two days after arrival, and sometimes release is granted before the vessel docks. A document problem or a CBP exam is the exception that stretches it to one to three weeks. The transit time is fixed; the clearance time depends almost entirely on whether the entry is accurate and filed early.
How much does customs clearance cost?
Beyond the broker and clearance fee, which is a flat per-entry charge, you pay duty at your HTS rate plus any Section 301 tariff, the MPF at 0.3464 percent of value, the HMF on ocean imports, and the continuous customs bond. The duty is the line that moves the total, so the classification matters far more to the cost than the clearance fee itself.
What happens if my shipment is not cleared?
It stays in CBP custody and cannot be picked up until the issue is resolved, whether that is a missing document, a value question, or an exam. Storage and demurrage charges accrue while it waits. The cause is almost always earlier in the file: a complete, accurate, pre-filed entry rarely stalls, while a vague or inconsistent one invites exactly this.
Do I need a customs broker to clear customs?
For a formal commercial entry, effectively yes. An importer of record can technically self-file, but almost none do, because the entry rides on a licensed broker's filing. A forwarder manages the shipment and the entry files through a licensed customs broker, so one team owns the timeline while the license holder signs the filing.
Related Customs Guides
HTS and HS codes: how classification sets your duty rate.
ISF filing and the $5,000 penalty: the first deadline in the clearance process.
Section 321 and the de minimis exemption: when a shipment can skip a formal entry, and when it cannot.
Country of origin and USMCA rules: how origin drives duty and Section 301.
Continuous vs single-entry customs bond: the guarantee every formal entry rides on.
Section 301 tariffs on China: the China duty layer on top of the HTS rate.
Duty drawback: recovering duty on goods you later re-export.
Customs hold and exam: what to do when CBP stops a shipment.
Bonded warehouses and FTZs: deferring duty until goods enter US commerce.
Schedule B number: classification on the export side.
