7 Things a CB Customs Broker Does for Importers
A CB customs broker is a CBP-licensed professional who manages the customs clearance process on behalf of U.S. importers — from filing entry documents to paying duties and coordinating with federal agencies. Understanding what they actually do helps you hire the right one and avoid costly compliance mistakes.
Customs Broker (CB): A person or entity licensed by U.S. Customs and Border Protection under 19 CFR Part 111 to act as an agent for importers in the transaction of customs business, including the preparation and filing of entry documents, classification of goods under the Harmonized Tariff Schedule, and payment of duties and fees on the importer’s behalf.
There are approximately 11,000 CBP-licensed customs brokers active in the United States. Not all of them specialize in the same commodities, ports, or entry types. The seven functions below define what a qualified CB customs broker provides — and why each one matters to your bottom line.
Comparison Table: 7 Core CB Customs Broker Services
| Service | Required For | Regulatory Basis | Cost Range |
|---|---|---|---|
| Entry Filing (CBP Form 3461/7501) | All commercial imports | 19 USC § 1484 | $75–$200 |
| HTS Classification | All dutiable goods | hts.usitc.gov | Included or $50–$150 |
| ISF Filing | Ocean freight shipments | 19 CFR § 149 | $25–$60 |
| Duty & Tax Payment | All dutiable entries | 19 USC § 1505 | Pass-through + fee |
| PGA Coordination (FDA/USDA) | Regulated commodities | Agency-specific | $75–$500+ |
| Bond Procurement | Formal entries > $2,500 | 19 CFR § 113 | $50–$100/shipment |
| Admissibility & Exam Response | As required by CBP | 19 CFR § 151 | $150–$600+ |
1. Customs Entry Filing
Every commercial shipment entering the U.S. requires a formal customs entry. A CB customs broker prepares and files CBP Form 3461 (entry summary) and Form 7501 (duty payment) through CBP’s Automated Commercial Environment (ACE) portal. This is the core function that requires a CBP license — it is legally restricted to licensed brokers or the importer of record acting for themselves.
CBP processes over 35 million formal entries annually. Each filing must accurately describe the goods, their value, country of origin, and applicable HTS code. Errors trigger holds, examinations, and penalties under 19 USC § 1592.
A CB customs broker at a busy port like Los Angeles, Miami, or Chicago files dozens of entries per day, knows the local CBP officers, and understands which documentation quirks that port expects. That local knowledge alone can save days of clearance time.
Search all CBP-licensed customs brokers to find one active at your specific port of entry.
2. HTS Classification
What it is: Assigning the correct 10-digit Harmonized Tariff Schedule code to your goods — a number that determines your duty rate, any applicable trade remedies (antidumping, countervailing duties), and government agency requirements.
Misclassification is one of the most common — and expensive — customs mistakes. CBP can audit classifications retroactively for five years. A single misclassified HTS code on a high-volume import program can result in tens of thousands of dollars in back duties, interest, and penalties.
A qualified CB customs broker uses hts.usitc.gov and CBP’s binding rulings database to confirm the correct classification before filing. For ambiguous products, they can request a binding ruling that locks in the classification for future shipments — a critical risk management tool for regular importers.
If you import goods subject to Section 301 tariffs (China) or antidumping orders, check the ADCVD database to understand what additional duties your HTS code may trigger.
3. Importer Security Filing (ISF)
Ocean freight shipments require an Importer Security Filing — commonly called ISF or “10+2” — submitted to CBP at least 24 hours before cargo is loaded at the foreign port. This requirement is mandated by 19 CFR Part 149.
Late or inaccurate ISF filings carry penalties of up to $10,000 per violation. A CB customs broker who handles your ocean freight will file the ISF as part of the pre-arrival process, pulling data from the commercial invoice, bill of lading, and packing list.
This is a service many first-time importers overlook until they receive a penalty notice. Verify that any broker you hire for ocean shipments explicitly includes ISF filing — it is not always bundled into the base entry fee.
Browse brokers by U.S. port of entry to find ones active at ocean ports like Long Beach, Savannah, Houston, and New York/Newark.
4. Duty Calculation and Payment
A CB customs broker calculates the total duty, merchandise processing fee (MPF), and harbor maintenance fee (HMF) owed on your shipment, then remits payment to CBP on your behalf. The MPF alone runs 0.3464% of entered value, subject to a minimum of $31.67 and a maximum of $614.35 per entry (FY2025 rates).
Beyond basic duty rates, an experienced broker identifies whether your goods qualify for preferential treatment under free trade agreements — USMCA for goods from Mexico or Canada, for example — which can reduce duty to zero if origin documentation is in order.
Duty savings from proper FTA qualification often exceed the broker’s entire annual fee. That is a concrete financial reason to hire a knowledgeable CB customs broker rather than attempting self-filing.
5. Partner Government Agency (PGA) Coordination
Many commodities require clearance from agencies beyond CBP: the FDA for food, drugs, and medical devices; the USDA for agricultural products and plant materials; the EPA for vehicles and engines; the FWS for wildlife products. These are called Partner Government Agency (PGA) requirements.
A CB customs broker who specializes in your commodity type knows exactly which PGA filings to submit, what documentation is required, and how to respond when an agency puts a hold on your shipment. A broker unfamiliar with FDA import alerts, for example, can leave a food or pharma shipment stuck at the port for weeks.
Browse brokers by specialty — pharmaceutical, food and beverage, automotive, chemicals, electronics — to find brokers who handle PGA coordination for your product category routinely.
6. Customs Bond Procurement
Any formal entry exceeding $2,500 in value requires a customs bond — a financial guarantee that the importer will pay all duties, taxes, and fees owed to CBP. Bonds are governed by 19 CFR Part 113.
A CB customs broker can arrange either a single-entry bond (used once per shipment) or a continuous bond (covers all entries for 12 months, typically $50,000 minimum for active importers). Continuous bonds cost approximately $400–$600 per year and are almost always more economical for businesses importing more than a few times annually.
The broker acts as the bond’s agent of record in ACE, coordinating with a surety company on your behalf. Without a valid bond, CBP will not release your goods. This is a basic but critical administrative function — and getting it wrong delays everything downstream.
7. Exam Response and Admissibility Issues
CBP selects a percentage of shipments for physical examination, document review, or laboratory testing. When your cargo gets flagged, a CB customs broker manages the response: coordinating exam scheduling, providing additional documentation to CBP, engaging with partner agencies, and arranging for re-delivery or exam at the importer’s facility if needed.
Exam fees are charged by the container freight station or exam facility — typically $150–$600 for a standard exam — and these costs pass through to the importer. A well-connected broker at the relevant port can often expedite exam scheduling, reducing port storage charges that accumulate while you wait.
For detained shipments involving admissibility disputes — for example, a product that CBP believes may be mismarked for country of origin — your broker works directly with CBP’s port director to resolve the issue and can initiate a protest under 19 USC § 1514 if CBP’s determination is incorrect.
How to Choose the Right CB Customs Broker
Use these four criteria to narrow your search:
1. License verification. Confirm the broker holds an active CBP license. Look up their license number through CBP.gov. A license can be individual or entity-based — either is valid, but the license must be current.
2. Port and mode coverage. A broker licensed at Los Angeles seaport is not automatically the best choice for air cargo at O’Hare or a land crossing at El Paso. Confirm the broker has active operations at your specific port of entry. Browse by port to see who operates where.
3. Commodity experience. Ask directly about their experience with your product’s HTS chapter, FDA/USDA requirements, or applicable trade remedy orders. Read profiles like 5 Key Facts About Davidson and Sons Customs Broker, 5 Key Facts About Interglobo Customs Broker Inc, and 5 Key Facts About Soo Hoo Customs Broker to understand how established firms present their specialties.
4. Fee transparency. Get an itemized fee schedule — entry fee, ISF fee, bond fee, and any PGA coordination charges — before your first shipment. A broker who cannot provide a written fee schedule is a risk.
For businesses that also need warehousing and fulfillment alongside customs clearance, see 3PL With Customs Clearance and Warehousing Explained for how integrated providers work.
Find a Licensed CB Customs Broker Now
CustomsBrokerIndex.com lists over 11,000 CBP-licensed customs brokers across all 50 states, every major port of entry, and all major commodity specialties. Every listing is sourced from official CBP records — not self-reported.
Search all CBP-licensed customs brokers by city, state, port, or specialty to find the right broker for your next shipment. You can also browse brokers by state if you prefer to start by location.
Frequently Asked Questions
What does “CB” stand for in CB customs broker?
CB stands for Customs Broker. The designation refers to a professional licensed by U.S. Customs and Border Protection (CBP) under 19 CFR Part 111 to act as an agent for importers in the transaction of customs business, including the preparation and filing of entry documents, classification of goods under the Harmonized Tariff Schedule, and payment of duties and fees on the importer’s behalf.
How do I choose the right CB customs broker for my business?
Match the broker to your shipment type and port of entry. Verify their CBP license number through CBP.gov, confirm they have experience with your commodity (e.g., pharmaceuticals, food, electronics), and check whether they are active at your specific port. A broker licensed for air cargo at JFK may not be the best fit for a land border crossing at Laredo.
How much does a CB customs broker charge?
CB customs broker fees typically range from $75 to $200 for basic entry filing on a standard commercial shipment. Additional charges apply for ISF filing ($25–$60), bond fees, exam fees, and any required government agency processing. Complex shipments involving FDA, USDA, or antidumping duties can add $100–$500 or more in ancillary costs.
What is the difference between a CB customs broker and a freight forwarder?
A CB customs broker is specifically licensed by CBP to file customs entries and transact customs business — they are regulated under 19 CFR Part 111. A freight forwarder arranges transportation but is not required to hold a CBP broker license. Some companies hold both licenses, but the roles are legally distinct. Always verify the CBP license before assuming a freight forwarder also provides brokerage services.
What is the most common mistake when hiring a CB customs broker?
The most common mistake is hiring a broker based on price alone without verifying their CBP license or specialty. An unlicensed or inexperienced broker can cause delays, misclassifications, and CBP penalties that far exceed any fee savings. Always confirm the broker’s license number through CBP.gov and ask specifically about their experience with your commodity type and port of entry.