A formal customs entry is the declaration you file with U.S. Customs and Border Protection to bring a commercial shipment into the country, and the formal customs entry requirements come down to six things: the right documents, a correct tariff classification, electronic filing on the right forms, a customs bond, duty and fee payment on time, and records kept for five years. Miss any of them and the cargo either sits at the port or generates a penalty notice.
When a Formal Entry Is Required
Federal regulations require a formal entry whenever a shipment’s value exceeds $2,500.1eCFR. 19 CFR 143.21 – Merchandise Eligible for Informal Entry Value isn’t the only trigger. Certain categories require formal entry regardless of value, including goods subject to quotas, textiles, footwear, and products regulated by agencies such as the FDA or USDA.2U.S. Food and Drug Administration. Common Entry Types Commercial goods intended for resale or industrial use typically go through the formal process even when individual shipments are small.
Until you complete an entry, your cargo stays in government custody and cannot enter U.S. commerce.
Documents You Need Before You File
Commercial Invoice
The commercial invoice is the foundation of the entry. Federal regulations require it to show the purchase price in the transaction currency, a detailed description of each item, quantities in the weights and measures of the exporting country, all charges such as freight and insurance, and the country of origin.3eCFR. 19 CFR 141.86 – Contents of Invoices and General Information Required CBP calculates duties from this document, so anything wrong here flows into everything downstream.
Packing List and Bill of Lading
The packing list details gross and net weights, dimensions, and how goods are packed inside each container. CBP compares it against the invoice to catch discrepancies. The bill of lading (ocean) or air waybill (air) is both the shipping contract and the carrier’s receipt for the goods.
Tariff Classification
Every product must be classified under the Harmonized Tariff Schedule of the United States, which assigns ten-digit codes that set the duty rate and flag any special regulatory requirements.4U.S. International Trade Commission. Harmonized Tariff Schedule Classification errors are one of the most common sources of trouble. The wrong code can mean months of overpaid duties, or underpayment that surfaces later as a penalty.
Importer Identification and Country of Origin
The importer of record must supply a tax identification number, usually an IRS Employer Identification Number for a business or a Social Security number for a sole proprietor.5U.S. Customs and Border Protection. Importer Numbers You also have to report accurately where the goods were produced. Country of origin determines eligibility for preferential trade agreements and whether additional tariffs apply, and a false country-of-origin certificate can lead to seizure and criminal charges.6eCFR. 19 CFR Part 134 – Country of Origin Marking
How the Filing Actually Works
Entering merchandise is a two-step filing. CBP Form 3461 (Entry/Immediate Delivery) is the initial submission with the preliminary data — HTS codes, estimated values, bond information — that CBP uses to decide whether to release the cargo.7U.S. Customs and Border Protection. CBP Form 3461 – Entry/Immediate Delivery for ACE After release, you file CBP Form 7501 (Entry Summary) with the final duty calculations.8U.S. Customs and Border Protection. CBP Form 7501
Both forms are transmitted electronically through the Automated Commercial Environment (ACE), CBP’s web portal for importers, brokers, and partner government agencies.9U.S. Customs and Border Protection. Introduction to an ACE Secure Data Portal Account Most importers hire a licensed customs broker to handle the filings.
The Customs Bond
Every formal entry must be backed by a customs bond, which guarantees CBP that you will pay all duties, taxes, and fees and comply with applicable regulations.10eCFR. 19 CFR Part 113 – CBP Bonds You buy it from a licensed surety, which pays CBP if you default and then pursues you.
Two options exist:
- A single entry bond covers one shipment. The bond amount is based on shipment value plus duties, with a regulatory minimum of $100. Surety premiums often start around $50 to $65.11eCFR. 19 CFR Part 113 – CBP Bonds – Section 113.13 Amount of Bond
- A continuous bond covers all your entries for a year, with a minimum bond amount of $50,000 regardless of volume. For anyone importing more than a handful of times a year, a continuous bond is usually the cheaper choice.12U.S. Customs and Border Protection. Customs Directive 3510-004 – Monetary Guidelines for Setting Bond Amounts
Fees Charged on Top of Duties
Two mandatory government fees apply beyond the duties themselves. The Merchandise Processing Fee (MPF) is charged on every formal entry at 0.3464% of cargo value, with a 2026 minimum of $33.58 per entry and a maximum of $651.50.13U.S. Customs and Border Protection. Information on Customs User Fee Changes Effective October 1, 2025 Even a low-value formal entry hits the minimum.
The Harbor Maintenance Fee (HMF) applies to commercial cargo arriving by ocean vessel at 0.125% of appraised value.14eCFR. 19 CFR 24.24 – Harbor Maintenance Fee Air shipments are exempt.
Ocean Cargo Has an Earlier Deadline
If your goods are arriving by vessel, the Importer Security Filing (ISF), often called “10+2,” must be submitted at least 24 hours before the cargo is loaded onto the vessel bound for the United States.15U.S. Customs and Border Protection. Import Security Filing (ISF) – When to Submit to CBP That deadline typically arrives weeks before the entry itself.
The ISF reports the manufacturer, seller, buyer, ship-to party, container stuffing location, and HTS codes. Filing late, filing inaccurately, or skipping it can result in liquidated damages of $5,000 per violation, and CBP does not need to find anything wrong with your cargo to assess it.15U.S. Customs and Border Protection. Import Security Filing (ISF) – When to Submit to CBP
After Release: Payment, Exams, and Liquidation
You have 10 working days from the date of entry to file the Entry Summary and pay duties. Miss it and CBP demands liquidated damages equal to the amount of a single entry bond, or the equivalent on a continuous bond.16eCFR. 19 CFR Part 142 Subpart B – Entry Summary Documentation – Section 142.12 Payments typically clear through CBP’s Automated Clearinghouse.17U.S. Customs and Border Protection. Automated Clearinghouse
CBP may also select your shipment for examination.18U.S. Customs and Border Protection. Cargo Examination Exams range from non-intrusive imaging to full manual unloading at a Centralized Examination Station. The importer pays every associated cost: drayage, unloading and reloading labor, storage while the container waits, and any terminal demurrage. CBP does not reimburse these.
Liquidation is CBP’s final determination of duties and taxes owed. The statutory window is one year from the date of entry; if CBP doesn’t act, the entry is deemed liquidated at the duty rate you originally declared.19eCFR. 19 CFR Part 159 – Liquidation of Duties – Section 159.11
Partner Government Agency Data
CBP is not the only agency with authority over your shipment. FDA, USDA APHIS, EPA, FCC, and others have their own data requirements that flow through ACE alongside your customs entry. Product-specific fields, such as scientific names, processing details, country-of-harvest information, or permit numbers for APHIS-regulated goods, must be included in the PGA Message Set. Omit them and the entry is rejected or the cargo is held.
Fixing Errors After You File
If you catch an error after the Entry Summary is accepted but before liquidation, you can file a Post-Summary Correction (PSC) through ACE. The window is 300 days from the date of entry, or up to 15 days before scheduled liquidation, whichever comes first. The entry must be accepted, fully paid, not under CBP review, and not liquidated. ACE rejects PSCs filed outside the window.20U.S. Customs and Border Protection. Post Summary Corrections
Once CBP liquidates, the PSC option is gone. Your remaining remedy is a formal protest, which must be filed within 180 days of liquidation.21Office of the Law Revision Counsel. 19 USC 1514 – Protest Against Decisions of Customs Service Protests can challenge classification, valuation, duty rates, and other entry determinations. A denial can be appealed to the U.S. Court of International Trade. The 180-day deadline is firm.
Records You Have to Keep, and Penalties If You Don’t
Federal law requires you to keep all records related to an entry for five years from the date of entry, including invoices, packing lists, bills of lading, entry forms, and correspondence.22eCFR. 19 CFR Part 163 – Recordkeeping – Section 163.4 CBP can request them at any point in that window.
Willful failure to maintain or produce a requested record carries a fine of up to $100,000 or 75% of the merchandise’s appraised value, whichever is less, per entry. Negligent failure carries up to $10,000 or 40% of appraised value, whichever is less.23eCFR. 19 CFR 163.6 – Production and Examination of Entry and Other Records and Witnesses; Penalties Penalties apply per release, so exposure compounds across entries.
Substantive errors in entry documentation are handled under 19 U.S.C. § 1592, with penalties scaled to culpability:
- Negligence: up to two times the lost duties, or up to 20% of dutiable value if the error didn’t affect duties.24Office of the Law Revision Counsel. 19 USC 1592 – Penalties for Fraud, Gross Negligence, and Negligence
- Gross negligence: up to four times the lost duties, or 40% of dutiable value if duties weren’t affected.24Office of the Law Revision Counsel. 19 USC 1592 – Penalties for Fraud, Gross Negligence, and Negligence
- Fraud: up to the full domestic value of the merchandise, with potential criminal exposure.24Office of the Law Revision Counsel. 19 USC 1592 – Penalties for Fraud, Gross Negligence, and Negligence
The line between negligence and gross negligence often turns on whether the importer exercised “reasonable care,” a standard CBP evaluates against the complexity of the transaction, the importer’s experience, and the steps taken to ensure accuracy. Voluntarily disclosing an error before CBP finds it significantly reduces exposure, which is why experienced importers treat self-correction as a compliance discipline rather than an admission.