Short answer: To show reasonable care on an HTS code, U.S. Customs and Border Protection (CBP) expects the importer of record to produce a record, made when the code was chosen, of what the product is, which headings and legal notes were weighed, which rulings were checked, who approved the code and when. The duty comes from 19 USC 1484(a)(1), which requires the importer of record, “using reasonable care”, to file “the declared value, classification and rate of duty applicable to the merchandise”. Appendix B to 19 CFR Part 171 and CBP’s Reasonable Care informed compliance publication describe what that means in practice.
No checklist protects you once every box is ticked. CBP works from a list of questions in that publication, penalty guidelines that define negligence and gross negligence, and a burden of proof that falls on the importer in a negligence case. This guide takes each in turn and ends with a ten-field file template, filled in for a hypothetical hand wash.
Where does the reasonable care standard come from?
The reasonable care standard comes from 19 USC 1484(a)(1), in the form Congress gave it in Title VI of Public Law 103-182, the NAFTA Implementation Act of December 8, 1993. Title VI is known as the Customs Modernization Act, or Mod Act. It set up shared responsibility: CBP explains the law through rulings and informed compliance publications, and the importer of record (under 1484(a)(2)(B), the owner or purchaser, or a licensed broker designated by the owner, purchaser or consignee) uses reasonable care to declare classification, value and rate of duty.
The statute does not define the term. The closest thing to a definition is in CBP’s penalty guidelines for 19 USC 1592, Appendix B to 19 CFR Part 171. Paragraph (D)(6) says reasonable care includes “providing a classification and value for the merchandise”, “furnishing information sufficient to permit Customs to determine the final classification and valuation” and “taking measures that will lead to and assure the preparation of accurate documentation”. The same paragraph adds:
“Customs may consider an importer’s failure to follow a binding Customs ruling a lack of reasonable care.”
So a ruling you obtained and then stopped applying, because a new buyer or a new broker never saw it, is evidence against you.
What questions does CBP ask about classification?
CBP’s Reasonable Care informed compliance publication lists questions an importer should be able to answer, and says the list cannot cover every case.
Two general questions matter most to companies that use outside help. One asks whether “a responsible and knowledgeable individual within your organization reviewed the customs documentation prepared by you or your expert”. The other asks whether, if you use an expert, you discussed your imports with that expert in advance and gave full, complete and accurate information. The table pairs each classification question with the evidence that answers it.
| CBP’s question (paraphrased) | Evidence that answers it |
|---|---|
| Do you have a reliable procedure for describing the goods completely and accurately? | A fact sheet per SKU, each fact tied to a dated source document |
| Do you have a reliable procedure for a correct tariff classification? | A written procedure: who classifies, who reviews, what triggers a re-check |
| Did you obtain a CBP ruling, and do you follow it? | The ruling number on the SKU record, and entries that match it |
| What happens when description or classification information is not available? | A rule that the SKU waits until the facts are in, and a log of questions asked |
| Did you consult the tariff schedule, publications, court cases and rulings? | Notes, GRIs and rulings cited on the record, each with the date checked |
| Did you consult a customs expert (lawyer, broker, accountant, consultant)? | The expert’s written advice and a copy of the facts the expert was given |
| Does the product call for a laboratory analysis? | A lab report where composition decides the code |
| Can you maintain and produce the entry documentation? | A retention schedule that links each code to the entries filed under it |
Can you rely on a broker, supplier or classification tool?
You can rely on a broker, a supplier or a tool as part of reasonable care, but none of them takes the duty off the importer of record, whoever chose the code. How much weight the reliance carries depends on what you gave the adviser and what you did with the answer.
Customs brokers
A licensed customs broker has its own duties under 19 CFR Part 111. Section 111.39(c) requires a broker that learns a client made an error or omission on a customs document to “advise the client promptly” and to advise on “the proper corrective actions required”. The importer’s own duty under 1484 stays where it was. Reliance on a broker’s code holds up when the advice is in writing and specific to the product, the broker had the facts that decide the code (not an invoice line reading “plastic parts”), and someone inside your company reviewed it.
Suppliers
A supplier’s HS code is a lead, not a classification. The code on a foreign supplier’s invoice comes from another country’s tariff and matches the US code at most to six digits. Record it on the SKU file as “supplier code” and classify the product yourself against the HTSUS (US Harmonized Tariff Schedule).
Classification tools
A tool’s suggestion is research that a person still has to review and approve. Keep the tool’s output next to the approved code and name the reviewer.
Advice from CBP itself
Advice from CBP counts in a penalty case only if it was written down. Appendix B to Part 171, paragraph (G)(1), treats “misleading or erroneous advice given by a Customs official in writing” as contributory Customs error, or advice shown by a written CBP record made at the time, provided you relied on it reasonably and had given CBP all the relevant facts. If that error was the sole cause of the violation, the claim is cancelled. An undocumented phone call with an import specialist does not qualify. If you need CBP’s view on record, ask for a binding ruling under 19 CFR Part 177.
What does a reasonable-care file for one HTS code contain?
A reasonable-care file for one HTS code holds the facts, the legal reasoning, the sources, the result and the people, each dated. The template below has ten fields. The example column follows a hypothetical product, a foaming hand wash sold in a 250 ml pump bottle.
| Field | What goes in it | Example entry (hypothetical) |
|---|---|---|
| 1. Product facts | Composition, function, form, packing, with source and revision | Synthetic surfactant liquid, no soap, labelled for hands, retail pump bottle (spec sheet rev. 3) |
| 2. Headings considered | Every heading seriously weighed, and why each was rejected | 34.01, 34.02, 33.07 |
| 3. Legal notes | Section, Chapter and subheading notes applied | Chapter 34 Note 1(c) |
| 4. GRIs | The rule that decided the heading and the subheading | GRI 1 for the heading, GRI 6 for the subheading |
| 5. Explanatory Notes | Which WCO Explanatory Notes were read | Notes to heading 34.01 |
| 6. Rulings | Number, date, what it decided, date you confirmed it is still in force | CROSS rulings on liquid hand soap, with dates |
| 7. Result | The 10-digit code and the HTSUS edition and revision used | 3401.30, extended to 10 digits under the current HTSUS revision |
| 8. Duty consequences | Chapter 99 lines, AD/CVD or other programs that follow from the code | None found, checked on the approval date |
| 9. People and dates | Classifier, reviewer, approval date | Two names and a date |
| 10. Re-check triggers | Changes that reopen the code | New formulation; any “hair and body” claim on the label |
Written out, the reasoning in that example reads like this. Heading 34.01 of the Harmonized System covers, among other things, “organic surface-active products and preparations for washing the skin, in the form of liquid or cream and put up for retail sale”, whether or not they contain soap. Heading 34.02 covers surface-active and washing preparations, but only those “other than those of heading 34.01”. Chapter 34 Note 1(c) sends shampoos and bath preparations containing organic surface-active agents to Chapter 33, so the file records why this is a hand wash and not a bath preparation of heading 33.07: label, pack size, intended use. GRI 1 settles the heading and GRI 6 the subheading. A label change to “hair and body wash” would reopen the Chapter 33 question, hence field 10.
Built by hand, this file exists for a handful of products and nothing for the rest. TariffWolf records the sources, GRIs, rulings and reasoning behind each 6-digit HS code it returns, along with the reviewer and timestamps, and exports that record per SKU, so fields 3 to 6, the first six digits of field 7, and field 9 come out of the classification work itself. The last four digits in field 7 (your classifier’s or broker’s choice), the product facts, the duty check in field 8 and the link to entry numbers still come from your own team and systems.
How does reasonable care affect penalty culpability?
Reasonable care separates an honest error from negligence, and the facts around it separate negligence from gross negligence. Under 19 USC 1592(a), a violation is entering goods by a material false statement or material omission through fraud, gross negligence or negligence. Clerical errors and mistakes of fact are not violations under 1592(a)(2) unless they are part of a pattern of negligent conduct.
Appendix B to 19 CFR Part 171, paragraph (C), defines the three degrees:
- Negligence: failing to use the reasonable care and competence expected of a person in the same circumstances, for example in ascertaining the facts or drawing inferences from them, or in ascertaining your obligations under the statute.
- Gross negligence: an act or omission “done with actual knowledge of or wanton disregard for the relevant facts and with indifference to or disregard for the offender’s obligations under the statute”.
- Fraud: a material false statement, omission or act committed knowingly, meaning voluntarily and intentionally, as established by clear and convincing evidence.
Gross negligence needs both parts of that definition; a loose paraphrase such as “reckless disregard” drops the second. Under 1592(c), the maximum penalty is capped at the domestic value of the goods in every tier; below that cap, negligence is limited to twice the lost duties and gross negligence to four times. How CBP assesses and mitigates them is in CBP penalties under 19 USC 1592 for classification errors.
The file matters most because of who has to prove what. If the government sues in the Court of International Trade on a negligence theory, 19 USC 1592(e) requires it to prove only the act or omission. The importer then has to prove that the act or omission did not result from negligence. A dated record of the facts, notes and review is what carries that burden. Separately, 1592(d) requires CBP to collect any lost duties whether or not it assesses a penalty, so a good file limits the penalty, not the duty owed.
How do you build reasonable care into daily classification work?
Build the file when the code is approved. A file pieced together after a CF-28 arrives is a reconstruction, and it reads like one. Seven steps cover most importers:
- No new SKU goes on an entry until its fact sheet exists.
- Classify against the legal notes and the General Rules of Interpretation (GRI), and record the headings rejected as well as the one chosen.
- Send SKUs above a duty threshold you set, or with Chapter 99, Section 232 or AD/CVD exposure, to a second reviewer.
- Compare the codes your broker files against your product master every month and resolve every mismatch in writing.
- Re-check codes when the HTSUS is revised, when a Chapter 99 provision changes, when a product changes, and when CBP issues or revokes a ruling you rely on.
- Test a sample of filed entry lines each quarter and keep the results and fixes. The audit side of this is in getting classification ready for a CBP audit.
- Keep superseded versions of each record with the dates they covered.
For step 7, 19 CFR 163.4 generally requires entry records to be kept five years from the date of entry; retention by record type is in import records you must keep, and for how long. The same file answers a Request for Information about one entry, as described in answering a CBP Form 28 about classification.
Mistakes that weaken a reasonable-care file
The most common weak file holds only the code. Close behind: a supplier’s six-digit code extended to ten digits without a classification; reasoning that lives in a broker’s email and left with the broker; a record overwritten when the code changed, so nobody can show what was believed on the entry date; and reliance on oral advice from a port officer.
Related reading
- Rely on an existing CBP ruling or request your own?
- PSC, protest, 1520(d) or drawback: choosing the refund route
- How to audit the HTS codes you already use
- Tariff engineering vs misclassification: real cases and the legal line
Frequently asked questions
What is reasonable care in customs?
Reasonable care is the standard in 19 USC 1484(a)(1) that the importer of record must use when declaring classification, value and rate of duty. CBP’s penalty guidelines in 19 CFR Part 171, Appendix B, say it includes providing a classification and value and enough information for CBP to determine the final classification. For classification, that means a documented, reviewed basis for each code.
Does using a customs broker satisfy reasonable care?
A broker’s work can be part of reasonable care, but it does not move the duty off the importer of record. CBP’s Reasonable Care publication asks whether you gave your expert full and accurate information and whether someone knowledgeable inside your company reviewed the documentation the expert prepared. Keep the broker’s written reasoning for each code in your own file.
What is the difference between negligence and gross negligence under 19 USC 1592?
Negligence is a failure to use reasonable care and competence. Gross negligence, as defined in 19 CFR Part 171, Appendix B, requires actual knowledge of or wanton disregard for the relevant facts, together with indifference to or disregard for the obligations under the statute. The statutory maximum for gross negligence is twice that for negligence: four times the loss of duties against two times, each capped at domestic value.
Is a wrong HTS code automatically negligence?
No. Under 19 USC 1592(a)(2), clerical errors and mistakes of fact are not violations unless they are part of a pattern of negligent conduct, and a code reached through a careful, documented process can be wrong without being negligent. CBP will still collect any duty lost, under 1592(d).
The question CBP asks is whether a careful importer with your facts would have reached the same code, and only a record made at the time can show that. Start with the SKUs that carry the most duty or the most Chapter 99 exposure, write their files to the ten-field template, and make the file a condition of every new code from now on.
The TariffWolf platform overview shows the per-SKU record its classification work produces: the 6-digit HS code, the notes, GRIs and rulings cited, the reasoning, the reviewer and the timestamps. Set it against the ten fields above to see which parts of your file it would fill and which stay with your own systems.
Pick a time on the calendar that loads next — no email back-and-forth.
Sources
- 19 USC 1484, entry of merchandise (Cornell LII)
- 19 USC 1592, penalties for fraud, gross negligence and negligence (Cornell LII)
- 19 CFR Part 171, including Appendix B (eCFR)
- CBP, Reasonable Care informed compliance publication (2017 revision)
- 19 CFR Part 111, customs brokers (eCFR)
- 19 CFR 163.4, record retention (Cornell LII)
- WCO HS Nomenclature 2022, Chapter 34