What does a customs broker do?
A customs broker files your declaration and deals with the authority on your behalf. They are licensed to do it, they do it every day, and they are the reason most importers never speak to customs directly.
What they do not do is take on your liability. The importer of record answers for the classification, the value and the origin, whoever typed them into the system.
What the job actually is
The visible part is lodging the entry: the code, the customs value, the origin, the procedure and the supporting documents, in the authority's own system and in its own format. That is a specialised piece of data entry with real consequences for getting it wrong.
The less visible part is knowing which questions to ask before filing. A good broker notices that a description and a code disagree, that a certificate names the wrong consignee, or that a product needs a licence, and asks you about it while the goods are still moving.
What stays with you
The declaration is made in your name. If the classification is wrong, the assessment lands on you, and a post-clearance audit reaches back years rather than weeks. A broker who files what you told them has done their job.
That is the argument for understanding your own codes even when somebody else files them. You do not have to be able to do the paperwork; you do have to be able to tell whether the answer is plausible.
When you need one, and when you do not
Almost nobody needs a broker for a single shipment of ordinary goods on a courier service, because the courier is already acting as one and charging for it inside the delivery price. Whether you noticed is a separate question.
The threshold is roughly: repeated shipments, controlled or licensable goods, a product whose classification is genuinely arguable, or a value large enough that being wrong is expensive. Any one of those is worth the fee.
One persistent myth is worth killing here. No United States law obliges an importer to engage a broker at any value: the importer of record may file with CBP directly, and plenty do. What changes above the informal entry threshold is the type of entry required, formal rather than informal, not who is permitted to lodge it.
Choosing and briefing one
Ask what they know about your commodity rather than about importing in general. Classification expertise is product-specific and a broker who has never handled your category is starting where you are.
Give them the product specification, not just the invoice. Material composition, function and construction are what the code turns on, and a broker working from a marketing description is guessing as much as you would be.
A worked example
Watches into the United States, a category where the tariff line is exactly the kind a specialist earns their fee on.
| Goods value on the invoice | 6,000.00 |
| International freight | 90.00 |
| Cargo insurance | 60.00 |
| Value the duty is charged on (FOB basis) | 6,000.00 |
| Duty | not a percentage: 44¢ each + 6% on the case + 14% on the strap, band or bracelet + 5.3% on the battery |
| Estimate uses the US customs valuation method, which excludes international freight and insurance from the dutiable value. 19 U.S.C. 1401a(b)(4)(A) and 19 CFR 152.103: transaction value is exclusive of costs incident to the international shipment, where those charges are separately identified. Rate last verified 2026-08-31. | |
A duty stated in words rather than as a percentage is a good sign that the entry is worth having somebody experienced file.
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