How CBP Mitigates a 1592 Penalty: The Appendix B Math and the 50 Percent Floor

A proposed 1592 penalty is not a fine from a fixed schedule. It is the output of a published method that a finance team can run before counsel writes a response. The procedural playbook for answering a notice lives in the companion guide to responding to a CBP pre-penalty notice. This page is about the numbers.

How does CBP calculate a mitigated 1592 penalty?

CBP calculates it from the total loss of duty and the culpability tier, using the dispositions in paragraph (F)(2) of Appendix B to 19 CFR Part 171. The statute sets the ceiling; the guidelines set the range CBP normally settles inside.

Three definitions in the guidelines drive every number:

• Total loss of duty is "the sum of any actual and potential loss of duty." Actual loss sits on liquidated entries; potential loss sits on entries caught before liquidation. Both count toward the multiple.
• Payment does not shrink the base. Appendix B states: "Payment of any actual and/or potential loss of duty shall not affect or reduce the total loss of duty used for assessing penalties." Tendering the duty helps in other ways, covered below, but the multiplier base stays the same.
• Duty includes more than the tariff. The guidelines define loss of duty to include "any marking, anti-dumping, or countervailing duties, or any tax and fee (e.g., merchandise processing and/or harbor maintenance fees)."

Every mitigated penalty also carries two conditions. Appendix B says any mitigated amount "is conditioned upon payment of any actual loss of duty as well as a release by the party that indicates that the mitigation decision constitutes full accord and satisfaction." The penalty is on top of the duty, never instead of it.

What are the statutory maximums and the Appendix B ranges?

The ceiling comes from 19 U.S.C. 1592(c). The disposition ranges come from Appendix B, paragraph (F)(2). Each range is capped at the domestic value of the merchandise.

Bottom line: For a compliance lead sizing exposure on a disputed classification, the tier matters more than the position inside the tier. On a $400,000 duty loss, the full spread of negligence ($200,000 to $800,000) sits below the floor of gross negligence ($1,000,000). Moving a case down one tier at the pre-penalty stage outweighs any factor argued at the petition stage.

Fraud dispositions above 8 times, and non-duty-loss fraud above 80 percent, are possible "in a case involving an egregious violation, or a public health and safety violation, or due to the presence of aggravating factors," still capped at domestic value. For fraud, Appendix B also says the pre-penalty claim "ordinarily will be assessed in an amount equal to the domestic value of the merchandise."

Two smaller categories follow their own rules. Technical violations, where the loss of duty is "nonexistent or minimal," can draw a fixed penalty, generally $1,000 to $2,000 with no prior violations of the same kind, or $2,000 to $10,000 for multiple or repeated ones, and fixed sums "are not subject to further mitigation." In non-fraud cases, the Customs knowledge factor caps penalties for repeated violations after the date CBP knew of a violation and did not say so: 2 times the loss of duty for gross negligence and 1 times for negligence, in duty-loss cases.

A worked example on one $400,000 duty loss

Take an importer whose misclassified line produced a total loss of duty of $400,000, on merchandise with a dutiable value of $5,000,000 and a domestic value of $6,000,000. These are illustration figures, not a case.

The arithmetic: 0.5 x $400,000 = $200,000 and 2 x $400,000 = $800,000; 2.5 x $400,000 = $1,000,000 and 4 x $400,000 = $1,600,000; 5 x $400,000 = $2,000,000 and 8 x $400,000 = $3,200,000. In every row the importer also pays the actual loss of duty.

Bottom line: For a CFO reserving against an open 1592 matter, the reserve range is set by two facts: the tier CBP proposes and whether a valid prior disclosure was filed. A disclosed negligence case on this example costs the duty plus interest. The same case undisclosed and assessed as gross negligence starts at $1,000,000 before the duty is added.

What do mitigating and aggravating factors change?

They move a case inside its range; they do not move it between ranges. Appendix B paragraph (G) lists seven mitigating factors and says the list "is not all-inclusive." Each counts only "provided that the case record sufficiently establishes their existence":

1. Contributory Customs error, such as written CBP advice the party reasonably relied on. If the error was the sole cause, the claim is canceled.
2. Cooperation with the investigation, which must be "extraordinary cooperation beyond that expected."
3. Immediate remedial action, including paying the actual loss of duty before the penalty notice and within 30 days of CBP's notice of the amount, or fixing the procedural defect behind the violation.
4. Inexperience in importing, only where it contributed and the violation was not fraud or gross negligence.
5. Prior good record, meaning "a consistent pattern of importations without violation of section 592." Not considered in fraud cases.
6. Inability to pay, backed by 3 years of tax returns and an audited financial statement for the latest quarter.
7. Customs knowledge, the cap described above.

Paragraph (H) lists seven aggravating factors, including obstructing an investigation, withholding evidence, providing misleading information, and "prior substantive violations of section 592 for which a final administrative finding of culpability has been made." The guidelines set a hard limit on their use: aggravating factors "may not be used to raise the level of culpability attributable to the alleged violations, but may be utilized to offset the presence of mitigating factors."

Three of these factors (remedial action, prior good record, contributory Customs error) are won or lost on records that exist before CBP calls.

Does prior disclosure still cut the penalty?

Yes, and the protection sits in the statute rather than only in the guidelines. Under 19 U.S.C. 1592(c)(4), a disclosure made "before, or without knowledge of, the commencement of a formal investigation" limits the penalty to:

• Negligence or gross negligence: interest on the unpaid duties, taxes and fees, computed from the date of liquidation, provided the unpaid amount is tendered at disclosure or within 30 days of CBP's calculation.
• Fraud: 100 percent of the lost duties, taxes and fees, with the same tender condition, or 10 percent of dutiable value if the violation did not affect duties.

Appendix B paragraph (F)(2)(f) adds the administrative detail. For negligence and gross negligence in a duty-loss case, "there is no monetary penalty in these cases if the duty loss is potential in nature," meaning an error caught before liquidation costs the duty and nothing more. For non-duty-loss cases at those tiers there is no monetary penalty at all.

The decision of when to disclose is covered in the guide to prior disclosure under 19 CFR 162.74. For the arithmetic, the point is narrow: the prior disclosure caps are statutory, so a revision of the mitigation guidelines alone does not change them.

How do petitions and supplemental petitions work?

Relief from an assessed penalty runs through two administrative petitions under 19 CFR Part 171, decided in writing, and neither is protestable.

Bottom line: For trade counsel managing a penalty on behalf of a multi-entity importer, the supplemental petition is the second look Part 171 provides, and its clock can restart. If a protest or court decision later reduces the loss of duties, the 60 days run from that decision, which reopens the multiple itself rather than the factors.

Two boundaries apply throughout. The petition must be signed by the petitioner, an attorney or a customs broker, or a corporate officer or responsible employee (19 CFR 171.1(b)). And once a case is referred to the Department of Justice, "no action will be taken on any petition" (19 CFR 171.13(a)).

What would the 50 percent floor change, and is it in force?

It is directed, not in force. Executive Order 14411, signed June 3, 2026 and published at 91 FR 35125 on June 10, 2026, says in section 4(c):

"Within 90 days of the date of this order, the Secretary shall take steps to revise all mitigation standards consistent with the policy of this order. These revisions shall include establishing a minimum penalty floor of not less than 50 percent of the assessed penalty, absent exceptional circumstances that materially impact national security; establishing a minimum liquidated damages floor; and eliminating mitigation for repeat offenders."

The 90 days ran to September 1, 2026. As of October 15, 2026, a search of the Federal Register for CBP documents since June 1, 2026 found no rule or notice revising the mitigation guidelines, and the eCFR text of Appendix B, current to October 9, 2026, still carries the ranges in the tables above. CBP's penalties page still lists the existing mitigation guidelines publication. The order also states it "is not intended to, and does not, create any right or benefit, substantive or procedural, enforceable at law or in equity" by any party. Until CBP publishes revised standards, the precise mechanics, including what "assessed penalty" will mean in practice and who counts as a repeat offender, are open questions.

What can be worked out now is where a 50 percent floor would bite against today's numbers, assuming CBP assessed at the statutory ceiling. That is an upper case, not the default: for negligence and gross negligence, Appendix B says penalties at the ceilings "may be appropriate in cases involving serious violations," and an assessment below the ceiling would put the floor lower.

Quotable insight: On the guidelines' own numbers, a 50 percent floor would land hardest on negligence, the tier for errors made without knowledge or intent. Appendix B lets a negligence duty-loss case settle at 25 percent of the 2x ceiling, while the gross negligence minimum already sits at 62.5 percent of its 4x ceiling. If the floor is implemented against an assessment at the ceiling, an importer's cheapest remaining lever is the tier, not the petition.

Bottom line: For a CFO at a large multinational importer reserving for an open matter in 2026, model both cases: today's Appendix B range, and a negligence minimum of half the assessed amount. Label the second as directed and pending. Update the reserve when CBP publishes, not before.

The repeat offender clause interacts with an existing factor. Appendix B already treats prior substantive 1592 violations with a final administrative finding of culpability as an aggravating factor. The order goes further, directing that mitigation be eliminated for repeat offenders. How the term will be defined is not stated in the order. The broader order, including its bond and importer-eligibility provisions, is covered in the guide to the customs enforcement executive order.

What is left to work with before a penalty is assessed?

The levers that survive any version of the floor all operate before the penalty notice.

• Culpability is decided first. Appendix B says the pre-penalty notice states "a tentative determination of the degree of culpability," and "in general, the degree of culpability or proposed penalty amount stated in a pre-penalty notice will not be increased in the penalty notice." The pre-penalty response is where the tier is argued.
• Negligence is a reasonable care question. The guidelines define negligence as "the failure to exercise the degree of reasonable care and competence expected from a person in the same circumstances." A dated record of how each HTS code was reached, by whom and on what facts, is the evidence that separates negligence from gross negligence, and an error from a mistake of fact.
• Potential loss is cheaper than actual loss. Under prior disclosure, a negligent error found before liquidation carries no monetary penalty. Finding errors while entries are unliquidated is a scheduling decision.
• The loss of duty is a number to check. Every multiple runs off it. An administrative or judicial decision that reduces it reopens the supplemental petition clock under 19 CFR 171.61.

How CBP selects cases is covered in the CBP penalties guide.

Where this fits in a compliance program

Every lever in this guide depends on records an importer has before CBP asks: the reasoning behind each code, the date it was decided, and who approved it. GingerControl builds GingerOS, the AI trade compliance platform that runs on your process. It asks for missing product facts before it suggests an HTS code, and records the reasoning for your approval. It also checks each entry's HTS code, country of origin and customs value. A GingerOS project starts with Prototype Week: a clickable prototype of the customer's own flow in three days, with a quote after.

When a notice has already arrived, or a prior disclosure is under consideration, GingerControl's Trade Advisory gives senior practitioners as a second pair of eyes on classification and CBP requests, including prior disclosure. GingerControl is not a customs broker, importer of record or legal advisor, and it does not file entries or petitions. GingerControl identifies and documents the opportunity; your licensed broker or counsel files.

References

1. eCFR, Appendix B to Part 171, Guidelines for the Imposition and Mitigation of Penalties for Violations of 19 U.S.C. 1592. eCFR up to date as of 9 October 2026. Retrieved 15 October 2026.
2. U.S. Code, 19 U.S.C. 1592, Penalties for fraud, gross negligence, and negligence, subsections (c)(1) to (c)(4). GovInfo, 2023 edition. Retrieved 15 October 2026.
3. eCFR, 19 CFR 171.2, Filing a petition, with 171.1, 171.3, 171.13, 171.21 to 171.23. Retrieved 15 October 2026.
4. eCFR, 19 CFR 171.61, Time and place of filing (supplemental petitions), with 171.62 and 171.64. Retrieved 15 October 2026.
5. Federal Register, Executive Order 14411, Strengthening Customs Enforcement, 91 FR 35125, signed 3 June 2026, published 10 June 2026. Retrieved 15 October 2026.
6. U.S. Customs and Border Protection, Penalties. Last modified 3 February 2025. Retrieved 15 October 2026.