CBP Form 7501 Explained: Reading the Entry Summary Block by Block

What is CBP Form 7501?

CBP Form 7501 is the entry summary: the filing that tells U.S. Customs and Border Protection what was imported, how it is classified, what it is worth, where it was made, and what duty, tax and fees were paid on it. CBP's Form 7501 instructions state the purpose plainly: the information is collected "to identify merchandise entering the commerce of the United States and to document the amount of duty and/or tax paid."

Where does overpaid duty show up on a 7501?

On the line items, not the header. Overpaid duty enters through four places: the HTS and chapter 99 numbers in column 33, the entered value in column 36, the special program indicator in column 31, and the fee lines that roll up to block 43. Every dollar in the duty total is a rate multiplied by a base on one of those lines.

TL;DR: A 7501 has 30 header blocks and a line-item grid. For a finance or compliance reader auditing duty paid, most of the header is logistics metadata. The money sits in columns 31 to 38 and in blocks 39 to 44. For a team reviewing a few thousand entry lines a quarter, the audit question for each line is the same: was the right rate applied to the right base, under the right program? GingerControl is a trade compliance AI platform whose Tariff Calculator recomputes the full U.S. tariff stack (base duty, Section 232, Section 301, chapter 99) for a given HTS number, origin and date, which gives a reviewer an independent figure to hold against what the 7501 says was paid.

Last updated: October 2026

This guide uses CBP's current instructions, revision 02/26, as the primary source. Block and column numbers below follow that document.

How is the entry summary laid out?

The form has two parts. Blocks 1 to 30 form the header and describe the shipment as a whole. Columns 31 to 38 form the line-item grid, one line per commodity. Blocks 39 to 44 carry the totals and the importer's declaration.

CBP defines a line this way: "A 'line number' refers to a commodity from one country, covered by a line which includes a net quantity, entered value, HTS number, charges, rate of duty and tax." That definition is the audit unit. A line is one product from one origin, with its own rate and its own base.

Block or column	What it holds	Why an auditor cares
1, Entry number	3-character filer code, 7-digit entry number, check digit	The key you join everything else on
2, Entry type	Two-digit code, e.g. 01 free and dutiable consumption, 06 FTZ consumption, 11 informal	Sets which rules and fees apply
7, Entry date	Date of release in most cases	Drives which rates were in force and when the correction clocks start
10, Country of origin	ISO code, or MULTI with per-line codes in column 31	Origin decides which chapter 99 layers attach
13, Manufacturer ID	Constructed code for the invoicing party	Ties a line to a supplier
21 to 24, Melt, pour, smelt, cast	ISO codes for steel and aluminum inputs	Required for Section 232 metal articles
31, Line number and SPI	Line sequence, special program indicator	A missing SPI means a preference was not claimed
33A, HTS number	Full 10-digit number, plus any chapter 98 or 99 numbers	The rate is read from here
33D, Other fees	MPF, HMF and other fees at line level	Fees calculated per line
36A, Entered value	U.S. dollar value under 19 U.S.C. 1401a	The base for ad valorem duty and MPF
36B, Charges	Freight, insurance and other charges, prefixed C	Reported separately from value
36C, Relationship	Y or N for related-party transactions	Flags transfer-pricing exposure
37, Rates	HTS rate, AD/CVD rate, IRC rate	The multiplier
38, Duty and IR tax	Amount per rate	Rate times base, line by line
39, Total entered value	Sum of line values	Reconciles to invoices
41 to 44, Totals	Duty, tax, other (fees and deposited AD/CVD), total	What was paid

Bottom line: For a finance team auditing duty paid across a few thousand entry lines, the header blocks are reference data and the line grid is where money moves. Read columns 31, 33, 36, 37 and 38 together, one line at a time, and treat the header as the context that tells you which rates should have applied.

Where do the HTS number and chapter 99 lines appear?

In column 33A. CBP's instructions require "the appropriate full 10-digit HTS item number," left-justified, in the format 4012.11.4000. Where a binding ruling covers the item, the ruling number goes directly below it, prefixed RLNG.

Additional duties do not get their own line. They ride on the product's line as extra HTS numbers. CBP's CSMS 69668138, issued August 27, 2026, sets the order of reporting when a chapter 98 or 99 number is claimed:

1. Chapter 98 classification, if applicable
2. Chapter 99 classifications for additional duties, with trade remedies in this order: Section 301, then Section 338, then Section 232, then Section 201 duties, then Section 201 quota
3. Chapter 99 classifications for replacement duty or other use, such as the Miscellaneous Tariff Bill
4. Chapter 99 classification for other quota
5. The chapter 1 to 97 classification

The same message states that "the entered value of the imported product reported on the entry summary line should be reported on the Chapter 1-97 HTSUS classification, unless Chapter 98 reporting provisions require the entered value to be reported differently." The sequence is a reporting order. A slot in it does not mean a given measure applies to your goods; that depends on the product, the origin and the entry date.

For an auditor, this layout matters in two ways. First, a single line can carry three or four HTS numbers, each with its own rate in column 37 and its own amount in column 38, so the line's duty is the sum of several products. Second, the chapter 1-97 number is still the anchor. If it is wrong, every chapter 99 layer keyed to it may be wrong too.

Classification errors can move the most money on a line, because a different 10-digit number can change both the base rate and which chapter 99 measures attach. Checking that number means classifying the product again from its facts, not re-reading the code. GingerControl's HTS Classification Researcher follows GRI logic and asks clarifying questions before proposing a classification, citing relevant CROSS rulings during the reasoning, not after it. It is research that supports a classification decision; the final call benefits from professional judgment and it does not provide legal advice.

Where do MPF and HMF appear?

In two places. At line level, column 33D: CBP lists the merchandise processing fee and harbor maintenance fee among the "other fees" identified "directly below the pertinent line information." The instructions add that "all fees, with the exception of the HMF, are to be reported at the line item level," while HMF may appear once at the bottom of column 33 on the first page.

Then in the Other Fee Summary for block 43, each with a collection code. MPF is code 499. HMF is code 501. Informal entry MPF is code 311.

The rates come from regulation, not the form:

• MPF is "an ad valorem fee of 0.3464 percent" on formally entered merchandise, based on value under 19 U.S.C. 1401a, per 19 CFR 24.23. The fee has a minimum and a maximum per entry, adjusted for inflation each fiscal year. For fiscal year 2027, from October 1, 2026, they are $34.58 and $670.86, per CBP's Federal Register notice of July 31, 2026. Check the bounds in force on the entry date, not the current year's figures.
• HMF is "a port use fee of 0.125 percent (.00125) of its value" on cargo loaded on or unloaded from a commercial vessel, per 19 CFR 24.24.

The 7501 instructions add two details that matter to an auditor. On MPF: "There is no de minimis collection for the MPF," and the filer reports the minimum or maximum when the calculated amount falls outside them. On free trade agreements: "Goods originating under a Free Trade Agreement (FTA) may be exempt from MPF. To obtain this exemption, the importer must indicate the appropriate SPI for each HTS number in Column 31." Our merchandise processing fee guide works through the fee math with examples.

Where do entered value and country of origin appear?

Entered value is column 36A, recorded "in whole dollars rounded off to the nearest whole dollar," with the total in block 39. CBP defines it by reference to 19 U.S.C. 1401a, which defines the price actually paid or payable as "exclusive of any costs, charges, or expenses incurred for transportation, insurance, and related services incident to the international shipment of the merchandise." Those charges go in column 36B, prefixed with a C, as a separate figure. Column 36C records whether buyer and seller are related parties.

Country of origin is block 10, an ISO code from Annex B of the HTS. CBP's instruction is specific: "When merchandise is invoiced in or exported from a country other than that in which it originated, the actual country of origin shall be specified rather than the country of invoice or exportation." When an entry covers several origins, block 10 reads MULTI and each line carries its own origin code in column 31, prefixed O.

Two header blocks sit close to origin and are easy to confuse with it. Block 14 is the exporting country. Blocks 21 to 24 hold the country of melt and pour for steel and the countries of smelt and cast for aluminum. CBP says block 21 "is required for the articles of steel subject to the Section 232 steel and steel derivatives measures" and that "this information must be submitted regardless of whether the Section 232 duty treatment applies." Blocks 22 to 24 carry the same rule for aluminum.

Origin matters to an audit because most chapter 99 measures are origin-specific. A wrong code in block 10 or column 31 can add a layer of duty that should not be there, or drop one that should.

Which 7501 errors cause duty overpayment?

The same arithmetic runs on every line: a rate from column 37 multiplied by a base from column 36A or 35, summed in column 38. So an overpayment can only come in through a wrong rate, a wrong base, a missed program, or a wrong fee.

Quotable insight: Every dollar in block 41 is a product of two numbers on a line: a rate read from column 37 and a base read from column 35 or 36. Add the fees in block 43, and overpayment has only four entry points: the wrong HTS or chapter 99 number, a value that carries freight or insurance, a preference not flagged in column 31, or a fee charged on the wrong base or where it does not apply. An audit that re-multiplies each line against the invoice and a fresh classification covers all four.

Overpayment pattern	Where it shows on the 7501	What to compare it against
Higher-rate classification	33A HTS number, 37A rate	A fresh classification of the product from its facts
Chapter 99 layer that does not apply	Extra numbers in 33A, amounts in 38	Origin in block 10 or column 31, entry date, measure scope
Freight or insurance inside value	36A entered value, 36B charges	Commercial invoice terms and freight breakdown
Unclaimed FTA preference	Missing SPI in column 31	Origin qualification records for the product
Fee on an inflated base	33D fees, block 43 summary	Corrected value and the MPF bounds in force on entry date
HMF on non-vessel cargo	Code 501 in block 43	Block 9 mode of transport

Bottom line: For a compliance team reviewing a quarter's entries, none of these patterns can be found by reading the 7501 alone, because the form is internally consistent by construction. Each one needs an outside reference: the invoice, a classification, an origin record, the mode of transport. The customs duty audit guide shows how to triage thousands of lines so the review reaches the entries worth opening.

A worked example shows how one error spreads. The figures are hypothetical and illustrate the arithmetic only; they are not current rates for any product. Suppose a vessel entry line reports $106,000 of entered value when the invoice shows $100,000 for the goods and $6,000 for ocean freight, and the combined duty rate on the line is 27.8 percent. The excess base is $6,000.

• Duty: $6,000 x 27.8% = $1,668.00
• MPF: $6,000 x 0.3464% = $20.78, if the entry is below the MPF maximum
• HMF: $6,000 x 0.125% = $7.50

Total overpaid on one line: $1,696.28. The duty figure dominates, and it grows with every chapter 99 layer on the line, because each layer applies to the same inflated base.

How do you audit a 7501 against what should have been paid?

Line by line, in this order:

1. Pull the line-level data, not the PDF. Each line's HTS numbers, rates, value, charges, SPI and origin. Our guide to reconciling broker entry data in ACE covers where that data comes from.
2. Check the entry date and liquidation status first. The date decides which rates were in force; the status decides whether a finding can still be acted on. See how to check entry liquidation status.
3. Re-derive the rate. Classify the product from its facts, then build the tariff stack for that HTS number, origin and date, including each chapter 99 layer.
4. Re-derive the base. Compare 36A against the invoice, and confirm freight and insurance sit in 36B, not inside value.
5. Check the program. If the product qualifies for a preference, confirm the SPI is in column 31.
6. Re-multiply and compare. Recomputed duty and fees against columns 38 and block 43. The difference, in either direction, is the finding.

Look for findings in both directions. A review that finds underpayments carries its own obligations, and the importer of record is the liable party. CBP's instructions define that party as "the individual or firm liable for payment of all duties," and 19 CFR 141.1(b) adds that "payment to a broker covering duties does not relieve the importer of liability if the duties are not paid by the broker."

Timing decides what a finding is worth. CBP's Post Summary Correction guidance says filers "can submit these changes within 300 days from the date of entry and up to 15 days of the scheduled liquidation date, whichever date is earlier." An entry not liquidated within one year is deemed liquidated by operation of law under 19 CFR 159.11. After liquidation, CBP's protest page explains that "within 180 days of liquidation, the importer, their broker, or attorney can contest CBP decisions" under 19 U.S.C. 1514. Our guide to recovering overpaid import duties maps each finding to the channel still open. GingerControl identifies and documents the opportunity; your licensed broker or counsel files.

Where this fits in your entry review workflow

Steps 3 and 6 above are where manual review runs out of capacity: re-deriving the tariff stack for every line, at the right date, with every chapter 99 layer in the right place. GingerControl's Tariff Calculator returns the full U.S. tariff stack for an HTS number, origin and date, with a per-component breakdown, so each 7501 line can be checked against an independent figure rather than re-read for internal consistency. GingerControl is a research and calculation layer that works alongside your broker; it does not file entries, act as importer of record, or provide legal advice.

References

[REF 1] U.S. Customs and Border Protection, CBP Form 7501 Entry Summary with Continuation Sheets and Instructions, revision 02/26 Data cited: block and column definitions, line-item definition, chapter 99 and fee reporting at line level, fee collection codes 311, 499 and 501, MPF and FTA SPI instructions, Section 232 melt and pour and smelt and cast blocks, importer of record definition Source: CBP Form 7501 instructions (PDF)

[REF 2] U.S. Customs and Border Protection, CSMS 69668138, Updated Guidance: Entry Summary Order of Reporting for Multiple HTS when 98 or 99 HTS are Required Data cited: reporting sequence for chapter 98 and 99 numbers; entered value reported on the chapter 1-97 number Source: CSMS 69668138 Published: August 27, 2026

[REF 3] Electronic Code of Federal Regulations, 19 CFR 24.23, Fees for processing merchandise Data cited: MPF ad valorem rate of 0.3464 percent; minimum and maximum adjusted under 24.22(k) Source: 19 CFR 24.23

[REF 4] Federal Register, CBP, "Customs User Fees To Be Adjusted for Inflation in Fiscal Year 2027," 91 FR 48398, FR Doc. 2026-15530 Data cited: MPF minimum $34.58 and maximum $670.86, required as of October 1, 2026; ad valorem rate unchanged at 0.3464 percent Source: 91 FR 48398 Published: July 31, 2026

[REF 5] Electronic Code of Federal Regulations, 19 CFR 24.24, Harbor maintenance fee Data cited: HMF of 0.125 percent of value on commercial vessel cargo Source: 19 CFR 24.24

[REF 6] 19 U.S.C. 1401a, Value Data cited: price actually paid or payable excludes international transportation, insurance and related services Source: 19 U.S.C. 1401a

[REF 7] Electronic Code of Federal Regulations, 19 CFR 141.1, Liability of importer for duties Data cited: payment to a broker does not relieve the importer of liability Source: 19 CFR 141.1

[REF 8] U.S. Customs and Border Protection, Post Summary Correction Data cited: PSC window of 300 days from entry and up to 15 days before scheduled liquidation Source: CBP Post Summary Correction

[REF 9] Electronic Code of Federal Regulations, 19 CFR 159.11, Entries liquidated by operation of law Data cited: entries not liquidated within one year deemed liquidated Source: 19 CFR 159.11

[REF 10] U.S. Customs and Border Protection, Protests Data cited: protest within 180 days of liquidation under 19 U.S.C. 1514 Source: CBP Protests