What Is Customs Clearance? The US Customs Clearance Process, Step by Step

Customs clearance is the legal process through which imported goods are released from the custody of US Customs and Border Protection (CBP) and the duties, taxes and fees owed on them are declared and paid. In practice it is a sequence of filings made by or for the importer of record, starting before the cargo leaves the foreign port and ending, for duty purposes, when CBP liquidates the entry months later.

This guide maps the US customs clearance process end to end: who is responsible at each step, which filing CBP expects and by when, and which documents are needed for customs clearance. Each stage is summarized here and linked to a dedicated guide where the detail lives.

What Is Customs Clearance in Shipping?

Under 19 CFR 141.1, liability for duties accrues when the importing vessel arrives in a US port with the intent to unlade, or when the goods arrive in the customs territory by any other mode. From that moment the shipment carries a debt to the United States, and customs clearance is the procedure that settles it and secures the right to take delivery.

Three parties do the work. The importer of record is the party that makes entry and owes the duty; the regulation describes that liability as a personal debt of the importer, and it states that paying a broker does not relieve the importer if the broker does not pay the duties to CBP. A licensed customs broker, licensed by CBP under 19 CFR Part 111, transmits the entry and advises on it. CBP reviews, releases, examines when it chooses, and later liquidates. Partner Government Agencies such as FDA, CPSC or USDA sit alongside CBP for regulated goods.

For shipping specifically, customs clearance is where the freight move and the regulatory move meet. A container can be discharged and fully paid for and still not leave the terminal, because release is a CBP decision, not a carrier decision.

The US Customs Clearance Process at a Glance

The sequence below applies to a formal consumption entry arriving by ocean. Air and truck shipments skip the ISF and the Harbor Maintenance Fee but follow the same entry, summary and liquidation path.

Before Arrival: ISF 10+2 and the Bond

Two obligations must be in place before the cargo reaches a US port, and neither can be fixed once the vessel is underway.

Importer Security Filing

For cargo arriving by vessel, 19 CFR 149.2 requires the ISF importer, or its agent, to transmit the Importer Security Filing electronically. Eight elements are due no later than 24 hours before the cargo is laden aboard the vessel at the foreign port: seller, buyer, importer of record number, consignee number, manufacturer or supplier, ship-to party, country of origin and the HTSUS number. The container stuffing location and the consolidator follow, no later than 24 hours before arrival in a US port. Those ten elements are the “10”; the “2” is the carrier’s vessel stow plan and container status messages under 19 CFR 4.7c and 4.7d.

The ISF is a security filing, not an entry, but it is enforced through the bond. Under the bond conditions in 19 CFR 113.62(j), the principal and surety agree to pay liquidated damages of $5,000 for each ISF violation. A late or inaccurate ISF can therefore cost money even when the entry that follows is clean.

The customs bond

Under 19 CFR 142.4, merchandise is not released on a formal entry unless a single entry or continuous bond containing the conditions of 19 CFR 113.62 is on file. The bond is a contract between the importer as principal, a surety and CBP that guarantees payment of duties and compliance with entry obligations, including the ISF.

CBP’s published guidance sets the minimum continuous bond at $50,000 or 10% of the duties, taxes and fees paid in the previous 12 months, whichever is greater. A single transaction bond generally covers the entered value plus all duties, taxes and fees, rising to three times the value for restricted merchandise. Which one fits a given program, and what happens when a continuous bond becomes insufficient, is covered in our guide to the customs bond.

Who Files the Entry: Importer, Broker and Power of Attorney

Every entry has an importer of record, typically the owner or purchaser of the goods, or a licensed broker designated by the owner. The importer of record carries the legal exposure: CBP’s Reasonable Care publication explains that under 19 U.S.C. 1484 the importer of record is responsible for using reasonable care to enter, classify and determine the value of the merchandise and to provide the information CBP needs to assess duties and enforce other laws. That obligation does not move to the broker when the entry is filed through one.

A broker files on the importer’s behalf, and 19 CFR 141.46 requires the broker to hold a valid power of attorney before transacting customs business in the principal’s name. The broker keeps it in its records rather than filing it with CBP. The scope of that document, who should sign it and how it is revoked are covered in our guide to the customs power of attorney.

Importers are not required to use a broker. CBP states that importers may file their own entries and that brokers are licensed by CBP but are not CBP employees. Most large importers use one because filing requires ACE connectivity, a bond and daily familiarity with classification, valuation and agency rules.

Choosing the Entry Type

The entry type decides how much documentation, security and fee exposure a shipment carries. The threshold is set in 19 CFR 143.21: shipments not exceeding $2,500 in value may generally be entered on an informal entry, while commercial shipments above that value require a formal entry backed by a bond. Informal entry has a notable exception: articles valued above $250 that are classified in Chapter 99, Subchapters III and IV of the HTSUS cannot use it. Because many current trade remedies are collected through Chapter 99 headings, that exception is worth checking on every low-value shipment.

Low-value shipments changed materially in the last two years. Duty-free treatment under the de minimis exemption of 19 U.S.C. 1321 was suspended for all countries from 29 August 2025, and on 24 June 2026 CBP published interim final rules suspending it indefinitely in its regulations, one for the postal environment and one for all other modes. The One Big Beautiful Bill Act terminates the exemption by statute from 1 July 2027. The dated timeline sits in our guide to the de minimis rule.

Shipments that once moved as de minimis now use informal or formal entry. CBP’s Low-Value Shipments proposed rule, published on 8 October 2026, would change informal entry filing for goods valued at $2,500 or less, add an electronic informal entry type for mail and require bonds on certain informal entries. Comments close on 7 December 2026; none of it is in force yet.

Release: CBP Form 3461 and ACE Cargo Release

Release is the step that lets the goods leave CBP custody. Under 19 CFR 142.3, the entry documentation consists of CBP Form 3461 or its electronic equivalent, evidence of the right to make entry, the commercial invoice, a packing list where appropriate, and any other documents CBP or another agency requires for the shipment. In practice the 3461 data is transmitted electronically through the Automated Commercial Environment, and the release decision comes back the same way.

Timing is fixed by 19 CFR 142.2: merchandise must be entered within 15 calendar days after landing, or after arrival at the destination port for goods moving in bond. Entry may be filed before arrival, so a release decision can exist before the container is available, and the entry summary can be filed at the same time so one filing serves as both.

Missing the window has a defined consequence. Under 19 CFR 4.37, unentered cargo may remain at the place of unlading until the fifteenth calendar day after landing; the carrier must then report it to CBP and to a general order warehouse within 20 calendar days, and the cargo moves there at the risk and expense of the consignee. Storage accrues there, and 19 CFR 127.2 sets a six-month horizon from the date of importation after which the options for withdrawing general order goods narrow.

Exams, Holds and Partner Government Agencies

CBP selects shipments for examination on its own risk criteria. An exam can range from a non-intrusive scan of the container to a full devanning at a Centralized Examination Station. CBP does not charge for the exam itself, but 19 CFR 151.6 places on the importer any expense involved in preparing the merchandise for examination and closing the packages. CBP’s own guidance notes that a complete devanning can cost several hundred dollars.

A separate category of hold comes from Partner Government Agencies. FDA, CPSC, USDA, EPA and others enforce their own admissibility rules at entry, and 19 CFR 142.3(a)(5) brings their documents into the entry package. When an agency holds a shipment, release depends on that agency, not on CBP alone. Food, drug and device importers deal most often with FDA review, and our guide to FDA detention and import alerts covers how those holds are resolved.

Most holds trace to data that could have been checked earlier: a description that does not match the classification, a missing agency data set, or a value that differs across documents. Reviewing the package before departure removes those triggers; it cannot remove CBP’s discretion to examine.

The Entry Summary: CBP Form 7501

Release lets the goods move; the entry summary settles the money. Under 19 CFR 142.12, unless it was filed at the time of entry, the entry summary documentation must be filed with estimated duties attached within 10 working days after the time of entry. CBP Form 7501 carries the classification, value, country of origin, duty rates, fees and any special program indicators for each line.

The summary is what CBP reviews, liquidates and audits, and errors made here surface later as rate advances, value adjustments or penalty cases. Field-by-field guidance is in our walkthrough of CBP Form 7501.

Classification, Valuation, Duties and Fees

Duty on a line equals a rate applied to a value, so two determinations drive almost every dollar on the entry. Classification under the Harmonized Tariff Schedule sets the rate and decides whether additional Chapter 99 duties apply. Valuation under 19 U.S.C. 1401a sets the base, starting with the price actually paid or payable and adding assists, royalties and other statutory additions, as explained in our guide to customs valuation.

Two federal fees ride on the same value. The Merchandise Processing Fee applies to formal entries at an ad valorem rate of 0.3464% under 19 CFR 24.23, payable at the time the entry summary is presented. For fiscal year 2027, from 1 October 2026, CBP Decision 26-14 sets the minimum at $34.58 and the maximum at $670.86 per entry. The Harbor Maintenance Fee under 19 CFR 24.24 is 0.125% of the value of commercial cargo unloaded at a covered port, and applies to ocean shipments only.

Illustrative: an ocean entry valued at $100,000 pays an MPF of $346.40 and an HMF of $125, before any duty. Fees, duty, freight and handling combine into the figure that matters for pricing, built line by line in our landed cost calculation guide.

Liquidation, Protest and Recordkeeping

Liquidation is CBP’s final computation of duties on an entry. Under 19 CFR 159.11, an entry not liquidated within one year from the date of entry is deemed liquidated at the rate, value, quantity and duty asserted by the importer of record. Under 19 CFR 159.12, CBP may extend that period in increments of up to one year, for no more than three years in total, when it needs information for appraisement or classification or at the importer’s written request for good cause; liquidation may also be suspended by statute or court order, and an entry not liquidated within four years is deemed liquidated unless suspension continues. Notices are posted electronically, so an importer that is not watching can miss the start of its own appeal window.

Disagreement with a liquidation, or with certain other CBP decisions, is raised by protest. Under 19 CFR 174.12, protests on entries made on or after 18 December 2004 must be filed within 180 days of the date of liquidation or the decision protested, on CBP Form 19 or electronically through ACE. A denied protest is the gateway to the Court of International Trade.

Under 19 CFR 163.4, records relating to an entry must be kept for 5 years from the date of entry, with shorter periods for specific cases. Those records are what a CBP audit or a penalty case under 19 U.S.C. 1592 tests the entry against.

Documents Needed for Customs Clearance

The core set is defined in 19 CFR 142.3 and 149.3, with commodity-specific additions. The checklist below reflects what a formal ocean entry needs to clear without a documents request.

Working With a Licensed Customs Broker

The customs clearance process rewards preparation more than speed. Entry type, bond, classification, value and agency data are all decided before the cargo arrives, and each can be checked against the regulations above before the first filing.

CargoTrans has worked as a licensed customs broker and freight forwarder since 1989. On an import program we file the ISF, entry and entry summary, arrange the bond, hold the power of attorney, coordinate Partner Government Agency data and monitor entries through liquidation. The importer of record remains the importer of record; our role is to make sure the entries it is responsible for are prepared with reasonable care. To review an import program, see our customs brokerage services.

Frequently Asked Questions