What is a 7501 form for customs purposes? It is the Entry Summary, the document that reports the value, classification, and duty computation for imported merchandise and triggers CBP’s assessment of the duties, taxes, and fees owed on that entry. Every formal entry needs one, filed within 10 working days of the merchandise’s release from CBP custody, with the estimated duties, taxes, and fees deposited at the same time.

This guide walks through what the form actually reports, block by block, in plain English: who has to file it, when it’s due, how MPF and HMF get computed on top of duty, and how the numbers it reports connect to liquidation months later. It also covers where the form fits alongside the customs bond and power of attorney a broker needs on file before it can touch an entry at all.

What CBP Form 7501 Is For

CBP uses Form 7501 to determine the appraisement, classification, and origin of imported merchandise, and to compute the duties, taxes, and fees due on it. It is a different document from the entry paperwork filed to get cargo released from CBP custody in the first place; the entry gets the goods off the port, the entry summary is what CBP actually uses to assess what’s owed and to compile official US import statistics.

That distinction matters operationally. A shipment can be released on an entry filing well before the entry summary and its duty payment are due, which is exactly why the two steps have separate deadlines inside the same customs clearance process.

For a shipment with more articles than fit on the base form, CBP Form 7501 comes with continuation sheets that repeat the commodity-line fields for additional entries, so a single entry summary can span several pages without changing anything about how it’s filed or when it’s due.

Who Files It, and When

Most entry summaries are filed by a licensed customs broker acting on the importer’s behalf, though an importer with the systems and expertise to do it can self-file. Either way, the filer must have the importer’s authorization on file, and for a broker that means a valid power of attorney; the filer of record is legally accountable for what the form reports.

CBP Form 7501 is generally due, along with the estimated duties, taxes, and fees it reports, within 10 working days of the merchandise’s release from CBP custody. Missing that window is a compliance problem in its own right, separate from whatever duty is ultimately owed. Our licensed customs brokerage team files entry summaries on this schedule as a matter of course for every client on file.

The Header Blocks: Entry Number, Entry Type, and Bond

The top of the form identifies the transaction. The entry number is an 11-digit alphanumeric identifier made up of a three-digit filer code assigned to the broker or importer, a seven-digit number unique to that filing, and a one-digit check digit computed from the preceding ten characters.

The Entry Type Code is a two-digit field where the first digit signals the general category of entry being filed, for example a consumption entry, an informal entry, or a warehouse entry, and the second digit refines that further. Nearby blocks record the summary date, the entry date, the surety number backing the transaction (or a code indicating none applies), and the bond type code, tying the filing directly back to the customs bond on file for that importer.

The Importer Number and Who's Accountable

The form also records the Importer of Record number, the identifier CBP uses to tie the entry to a specific importer for duty billing, compliance history, and statistics. That number is either the importer’s IRS-issued Employer Identification Number, a Social Security Number for an individual importer, or a CBP-assigned number for an importer that has neither, which is the usual case for a non-resident importer shipping into the US for the first time.

Whoever that number belongs to carries the legal weight of the filing. Under 19 U.S.C. 1484, the importer of record is required to make entry using reasonable care and to supply the information CBP needs to determine admissibility and assess duty, and that duty runs to the importer even when a broker prepares and files the paperwork.

The Commodity Lines: HTS Provisions and Duty Computation

Further down the form, each line item describes a specific article on the shipment and reports the HTS number that classifies it, the country of origin, the quantity, and the entered value. The duty rate attached to that HTS number, multiplied against the entered value, is what produces the duty amount owed on that line.

Getting the classification right on this section is what everything downstream depends on: the wrong HTS number produces the wrong duty rate, which produces the wrong amount deposited, which is exactly the kind of error CBP can catch and correct well after the goods have already cleared.

A single entry summary commonly carries several line items rather than one, particularly on a consolidated shipment covering more than one product or invoice. Each line is classified, valued, and duty-computed separately, so an entry summary for a mixed container can carry a dozen different HTS numbers and duty rates within a single filing, all of which have to reconcile back to the total duty deposited.

MPF and HMF: The Fees Stacked on Top of Duty

Two federal user fees ride alongside duty on most entry summaries. The Merchandise Processing Fee applies to formal entries at 0.3464% of the entered value, excluding freight and insurance, subject to a minimum and maximum that CBP adjusts periodically for inflation; for fiscal year 2026 that range runs from $33.58 to $651.50, effective October 1, 2025. Informal entries pay a smaller flat fee instead of the ad valorem calculation.

The Harbor Maintenance Fee applies only to cargo arriving by vessel, at 0.125% of the entered value, with no minimum or maximum cap. It does not apply to air, truck, or rail shipments. Both fees are computed and reported on the entry summary alongside duty, and both get deposited on the same 10-working-day schedule.

A manual, paper-filed entry summary also carries its own added surcharge on top of the standard MPF calculation, which is one more reason nearly every broker files electronically through CBP’s Automated Commercial Environment rather than on paper. None of these fees are optional or negotiable; they are statutory charges computed the same way for every filer submitting the same entry type.

From Entry Summary to Liquidation

The duty, MPF, and HMF paid when Form 7501 is filed are a deposit of estimated amounts, not a final bill. CBP has up to one year from the date of entry to liquidate it under 19 U.S.C. 1504(a), the point at which the duty assessment becomes final, and CBP can extend that window where more time is needed to verify classification, value, or origin.

Between filing and liquidation, corrections can still be made. An importer who spots an error in entered value, classification, or a duty computation can generally file a post summary correction before liquidation, rather than waiting for a formal protest afterward. That window is also why accurate HTS classification on the front end, backed by a binding ruling where the code is genuinely in doubt, is worth more than fixing the number later.

Frequently Asked Questions

A single entry customs bond guarantees CBP’s duties, taxes, and fees on one specific shipment at one port, while a continuous bond guarantees every entry an importer files at every US port for a full year. Every CBP bond must be written for at least $100 under 19 CFR 113.13, but a continuous bond is normally sized using CBP’s own sufficiency guidelines at roughly 10% of the duties, taxes, and fees an importer paid or expects to pay over a 12-month period, subject to a $50,000 floor. A single entry bond is instead sized to that one shipment: the entered value plus applicable duties, taxes, and fees, or three times the entered value where the goods are subject to certain other-agency requirements such as FDA regulation.

Picking the wrong one is not a paperwork problem, it is a coverage problem: an underbonded entry cannot be released, and an importer running frequent shipments on repeated single entry bonds is buying the same protection over and over at a higher aggregate cost. This guide compares the two bond types under 19 CFR Part 113, how CBP sets the amount for each, who is allowed to underwrite them, and what happens when a shipment shows up with no valid bond on file.

What a Customs Bond Guarantees Under 19 CFR Part 113

CBP bonds are governed by 19 CFR Part 113. A bond is a three-party contract between the importer (the principal), CBP (the obligee), and a surety, guaranteeing that CBP will collect the duties, taxes, and fees owed on an entry and that the importer will meet other obligations tied to it, including producing documentation on request, redelivering merchandise if CBP demands it, and paying any penalties assessed.

A bond is required for formal entries, which generally means shipments valued above $2,500 as well as certain regulated commodities regardless of value. Below that threshold, an informal entry can usually move without one, though CBP can still require a bond where the merchandise, the importer’s compliance history, or an other-agency requirement calls for it.

The floor set by regulation itself is modest. 19 CFR 113.13 states that the amount of any CBP bond must not be less than $100, with fractional amounts rounded up to the next whole dollar. That figure is a legal minimum, not a working number: real bond amounts are set well above it using CBP’s own monetary sufficiency guidelines, covered below. Our licensed customs brokerage team has that bonding conversation with every new importer before an entry is ever filed.

Single Entry Bond vs Continuous Bond: The Core Difference

A single entry bond, also called a single transaction bond (STB), covers exactly one entry at one port. Its surety number is recorded on the CBP Form 7501 entry summary filed for that shipment, and once the entry liquidates and CBP is satisfied duties and any other requirements were met, the bond’s obligation ends there. Ship again next month and you need a new one.

A continuous bond covers every entry the importer files at every US port of entry for a full year, and renews automatically until the importer or surety cancels it. One bond, one annual premium, unlimited covered entries within the bonded amount, for as long as the bond stays active.

When a Single Entry Bond Is the Right Choice

A single entry bond fits an importer who genuinely does not know if there will be a second shipment: a one-off equipment purchase, a trade-show sample, a first test order used to validate a new supplier before committing to a regular program. A non-resident importer bringing in a first US shipment while it decides whether to build an ongoing import program is a common real-world case.

The tradeoff is cost and continuity. Buying a fresh STB for every shipment across a year almost always costs more in aggregate than one continuous bond, and it builds no ongoing bonding relationship with a surety, which a growing importer will eventually need anyway. If the second shipment is already on the calendar, it is usually worth pricing a continuous bond instead.

When a Continuous Bond Makes Sense

A continuous bond is the standard choice for any importer shipping more than a handful of times a year, across one port or several. It removes the need to underwrite a new bond for every entry, which matters most for importers running a regular cadence of formal entries as part of an active trade compliance management program, since a lapsed or undersized bond on a recurring importer stalls every entry behind it, not just one.

Because a continuous bond‘s amount is tied to actual duty, tax, and fee volume, it also needs periodic review. An importer whose import volume or tariff exposure grows meaningfully during the year can outgrow the bond amount CBP originally approved, which is the scenario the sufficiency review described below exists to catch.

How CBP Sets the Bond Amount

For a single entry bond, the working formula is the total entered value of the shipment plus all duties, taxes, and fees that apply to it. Where the merchandise is subject to certain other-agency requirements, and a failure to redeliver it could pose a threat to public health or safety, including all FDA-regulated merchandise, CBP requires the bond to run at three times the total entered value instead.

For a continuous bond, CBP’s monetary guidelines (CBP Directive 3510-004, “Monetary Guidelines for Setting Bond Amounts”) generally set the amount at 10% of the duties, taxes, and fees an importer paid or is expected to pay CBP over a 12-month period, subject to a $50,000 minimum.

Neither formula is static. 19 CFR 113.13 lets CBP review bond sufficiency at any time, weighing the importer’s payment history, its compliance record with CBP demands, the value and nature of the merchandise, the degree of supervision the entries require, and its history of honoring past bond commitments. Where a bond is found insufficient, CBP will generally give the principal 15 days’ written notice to fix it, or demand additional security immediately if it believes the shortfall could jeopardize revenue or hamper enforcement.

Who Underwrites a Customs Bond

CBP will only accept a bond from a corporate surety listed in Treasury Department Circular 570, the Treasury’s published list of companies authorized to write federal surety bonds, and the amount each one may underwrite, under 19 CFR Part 113 Subpart D. Importers do not deal with CBP directly on the bond itself; a surety or a licensed customs broker with surety access places it.

The bond instrument itself is CBP Form 301, executed as either a single transaction bond or a continuous bond, never both on the same form. A broker who already holds your customs power of attorney and importer information can usually place either type without the importer dealing with the surety directly.

What Happens If You Ship Without a Valid Bond

A formal entry cannot be released without an approved bond on file, so merchandise sits, storage and demurrage charges accrue, and time-sensitive freight arrives late through no fault of the carrier. A broker also cannot complete the entry, bonded or not, without a valid power of attorney on file for that importer, which is why the two requirements get collected together during onboarding.

A continuous bond that has lapsed, been cancelled by the surety, or become insufficient for current volume creates the same stoppage, just for every entry behind it instead of one. Checking bond status before shipment volume grows, rather than after a hold at the port, is the cheaper way to find out the bond needs updating; the customs clearance process has no workaround for a missing or inadequate bond.

Frequently Asked Questions

There’s no single official ‘US Customs list of prohibited items’ published as one master document. What Customs and Border Protection (CBP) actually enforces is two different regimes: goods that are prohibited, meaning forbidden by law to enter the country under any circumstances, and goods that are restricted, meaning they can enter only with the right permit, license, or certification from the agency that regulates them. Confusing the two is the single most common mistake in blog-level guidance on this topic, and it’s the difference between a shipment that clears with paperwork and one that gets destroyed at the port.

This guide separates the two categories with the actual controlling agency for each, covers the wildlife, food, firearms, chemical, and consumer-product rules importers get wrong most often, and walks through what happens at the port when a restricted item arrives without the documentation CBP needs to release it.

Prohibited vs. Restricted: The Line CBP Actually Draws

CBP’s own definition is precise: prohibited items are ‘forbidden by law to enter the United States,’ full stop, while restricted items require ‘special licenses or permits…from a federal agency before the item is allowed to enter.’ The practical difference is enormous. A restricted shipment that shows up without its permit is a paperwork problem, often fixable, sometimes just slow. A prohibited shipment is not fixable by any document, because the law doesn’t allow that category of good into the country regardless of who’s asking or what they can prove.

That’s also why a category like firearms sits on the restricted side, an ATF import permit gets them through, while counterfeit trademarked goods sit on the prohibited side: no permit exists that legalizes trafficking in a counterfeit mark. Many of the goods that do require a license, rather than being flatly barred, need exactly the kind of Partner Government Agency permit covered in our companion guide to US import licensing, so if a product below turns out to be restricted rather than prohibited, that’s usually where to look next.

Absolutely Prohibited: Nothing Gets These Through

Counterfeit and pirated goods are the largest prohibited category by volume. Importing merchandise bearing a counterfeit trademark or infringing a registered copyright is illegal outright, not a licensing gap, and CBP reports that nearly 90% of its intellectual property seizures in fiscal year 2025 originated from China and Hong Kong. Criminal trafficking in counterfeit goods carries penalties of up to $2 million and 10 years in prison; an individual importer can be fined even without knowing the goods were counterfeit.

Dog and cat fur products are banned outright under the Dog and Cat Fur Protection Act (19 U.S.C. 1308), covering the fur itself and any product, garment or otherwise, that contains it, with no permit pathway and civil and criminal penalties plus forfeiture for violations. Drug paraphernalia, defined broadly under 21 U.S.C. 863 to include pipes, bongs, and similar items primarily intended for use with a controlled substance, is also flatly prohibited; CBP’s penalty for importing it is typically the full domestic value of the shipment, separate from any criminal exposure.

Certain cultural property is prohibited without an export certificate from the country of origin under the Cultural Property Implementation Act (19 CFR 12.104): pre-Columbian archaeological artifacts from Guatemala’s Peten region and specific categories of Peruvian colonial-era material are examples of items the United States has placed under standing import restrictions, and merchandise imported in violation is subject to seizure and forfeiture. Switchblade knives are another flat federal prohibition under 15 U.S.C. 1242, the Switchblade Knife Act, with statutory exceptions narrow enough to be irrelevant to a commercial importer, essentially limited to Armed Forces contracts and a single-arm-carry personal exception. Add absinthe above the legal thujone limit and merchandise from a handful of comprehensively sanctioned origins, and the pattern across every prohibited category is the same: no license fixes it.

Restricted Wildlife, Animal, and Plant Products

Wildlife and wildlife products need an import/export license from the U.S. Fish and Wildlife Service (FWS), and anything on a Convention on International Trade in Endangered Species (CITES) appendix needs a CITES permit on top of that; the shipment also has to move through one of the ports FWS has designated for wildlife unless a separate exception permit is obtained. African elephant ivory is the sharpest example of how far ‘restricted’ can bend toward prohibited in practice: commercial import is barred outright, and the only narrow opening is a genuine antique, 100 years or older and unaltered since 1973, entering through one of thirteen specific antique ports with documentation to prove it.

Live animals and animal germplasm need a USDA Animal and Plant Health Inspection Service (APHIS) Veterinary Services permit. Meat, poultry, and egg products can only enter from countries and specific foreign establishments USDA has already certified as equivalent to the US inspection system; there’s no permit an individual shipment can obtain to bypass that, the exporting facility has to already be on the approved list. Plants, seeds, cut flowers, and a wide range of wood-containing products need a phytosanitary certificate plus a Lacey Act declaration (APHIS PPQ Form 505); APHIS expanded that declaration requirement again in a December 2024 phase that pulled in items like furniture, tools, and boats that previously didn’t need one, exactly the kind of quiet rule change that catches importers off guard.

Restricted Firearms, Chemicals, and Hazardous Materials

Firearms, ammunition, and implements of war need an ATF import permit (Form 6), generally filed through a licensed importer; defense articles on the US Munitions List need a separate license from the State Department’s Directorate of Defense Trade Controls under ITAR. Neither category is prohibited outright, but both require the permit in hand before the shipment departs, not after it arrives.

Industrial chemicals fall under the Toxic Substances Control Act, which requires an importer to certify at entry that the chemical either complies with TSCA or isn’t subject to it. Pesticides and pesticide devices need an EPA Notice of Arrival filed before the shipment lands, and radiation-emitting electronics, certain lasers and specific consumer electronics among them, need a declaration filed with FDA’s Center for Devices and Radiological Health. None of these show up on a general prohibited-items list because they’re not banned; they’re gated behind a specific agency’s paperwork.

Consumer Products, Toys, and Electronics: Where CPSC and FDA Draw the Line

Toys, children’s products, and a wide range of consumer electronics fall under the Consumer Product Safety Commission (CPSC), which requires testing and certification, either a General Certificate of Conformity or a Children’s Product Certificate depending on the product, before the goods can clear. CBP holds shipments that show up without that certification, and CPSC moved to mandatory electronic filing of these certificates in ACE, effective July 8, 2026, which means paper certificates that used to work as a stopgap no longer do. Our CPSC import compliance guide covers the certification and eFiling mechanics in full.

Some of the same electronics also trip FDA’s radiation-control rules if they emit radiation as part of normal operation, which means a single consumer product can carry both a CPSC certification requirement and an FDA declaration requirement at the same time. Treating either one as optional because the other agency already signed off is a common and expensive mistake.

Forced Labor and Origin-Based Import Bans

Section 307 of the Tariff Act (19 U.S.C. 1307) bars the import of any merchandise made wholly or in part with forced labor, and the Uyghur Forced Labor Prevention Act (UFLPA) makes that a rebuttable presumption for goods with any connection to China’s Xinjiang region or to a company on the UFLPA Entity List: CBP treats the goods as forced-labor-tainted unless the importer proves otherwise with clear and convincing evidence, a materially higher bar than ordinary customs documentation. The Entity List itself keeps growing; the Department of Homeland Security’s July 2026 update added 43 companies in its largest-ever single expansion, bringing the total to 187 listed entities.

This kind of origin-based enforcement increasingly overlaps with trade-remedy enforcement more broadly, since goods transshipped to disguise their true country of origin can trigger both a forced-labor hold and separate exposure under antidumping and countervailing duty rules if the true origin is a country subject to an AD/CVD order. Screening suppliers against the UFLPA Entity List before sourcing, rather than after a shipment is already detained, is exactly the kind of ongoing check a trade compliance management program is built to catch. Merchandise from a handful of comprehensively sanctioned countries carries its own separate prohibition, layered on top of whatever product-specific rule would otherwise apply.

What Happens at the Port When a Restricted Item Arrives Without Paperwork

Picture a shipment of exotic leather handbags arriving without the CITES export permit the country of origin was supposed to issue. CBP has five business days from examination to decide whether to release or detain the merchandise under 19 CFR 151.16; once it’s detained, a formal Notice of Detention follows within five business days of that decision, stating what’s missing and what would resolve it. That notice is the fork in the road: a restricted item can still clear if the missing FWS or CITES documentation gets produced within the window CBP allows, sometimes by the exporter issuing it retroactively, sometimes not.

If the paperwork never comes through, the importer is typically required to export or destroy the merchandise rather than abandon it quietly; unresolved cargo left at the port becomes eligible for a General Order warehouse after 15 calendar days, accruing storage charges from day one, and is sold at auction or destroyed after six months if nobody claims it. A genuinely prohibited item, counterfeit goods or dog and cat fur products rather than merely restricted wildlife, skips this whole process. There’s no documentation window, because 19 U.S.C. 1595a(c) authorizes straight seizure and forfeiture for merchandise introduced contrary to law. A licensed customs broker who has actually filed the entry, rather than a general logistics provider, is who typically manages the CBP correspondence here; CargoTrans has been filing these entries since 1989, and the recurring lesson is the same one every time: a restricted shipment survives the process when the paperwork gap gets caught before departure, not after CBP already has the cargo.

Frequently Asked Questions