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CBP Post Summary Correction and its Usefulness to Importers

A digital illustration depicting a stack of paperwork on the left stamped "wrong" and a document on the right stamped "correct" with an outline of a clock over the image, reinforcing the limited timeline to submit a post summary correction.
Proper use of post-summary corrections can prevent costly fines and other punitive actions from Customs and Border Protection (CBP). We show you how in this article.
Updated: December 3, 2025
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Between estimating duties and finding the right U.S. Harmonized Tariff System (HTS) code to classify your imports, it should come as no surprise mistakes can happen in documentation. CBP realizes this and has mechanisms in place to correct errors before penalties can ensue. Post summary correction (PSC) is one such mechanism, and our brokers have years of experience submitting these corrections on behalf of importers.

Key Takeaways

  • A post summary correction can be used prior to the CBP liquidation process to correct certain data points on Form 7501 (the entry summary) including valuation, quantity, and country of origin.
  • If you wish to submit a PSC, you must do so within the sooner of the following two dates: 300 days of the shipment’s entry or no more than 15 days prior to scheduled liquidation.
  • Outside of the specified date range, importers must use a protest or prior disclosure to contest suspected errors.
  • Brokers are able to submit PSCs for importers via the Automated Commercial Environment (ACE) Portal with permission from the original importer of record (IOR).

Knowing when to use a PSC can prevent issues with CBP before they occur. Let’s explore how.

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Definition of a Post Summary Correction

CBP’s post-summary correction process allows importers in the US to make corrections to the 7501 entry summary form prior to the CBP liquidation process. They’re used when an importer or broker makes a mistake filling out certain data points on this form.

When a post summary correction is submitted to CBP, it basically acts as a new summary, requiring payment prior to processing. Entries that have already been liquidated are not eligible for this process.

While not every entry type can be amended via PSC, many types commonly used by commercial importers can.

Entry Types Eligible for PSC

One of the first criteria you should use to determine if your goods qualify for a post summary correction is the entry type. CBP allows PSCs for the following 14 types of entries.

An infographic titled "CBP Entry Type Codes That Qualify for Post Summary Correction" showing the code types and their descriptions. The information is presented in two columns and reads as follows:

01: Consumption
02: Consumption Quota/Visa
03: Antidumping/Countervailing Duty (AD/CVD)
06: Consumption: Foreign Trade Zone (FTZ)
07: Consumption: Combination AD/CVD and Quota/Visa 
21: Warehouse
22: Re-warehouse
23: Temporary Importation Bond (TIB)
31 - Warehouse Withdrawal: Consumption
32: Warehouse Withdrawal-Quota
34: Warehouse Withdrawal: AD/CVD
38: Warehouse Withdrawal -Combination AD/CVD and Quota/Visa 
51: Defense Contract Administration Service Region (DCASR)
52: Government Dutiable

It’s important to distinguish that while these entry types can have their information corrected via a PSC, the entry type itself can only be changed if you’re going from 01 to 03 or vice versa.

Outside of these entries, you won’t be able to correct documents and submissions via a PSC, and not all data points on the entry summary can be corrected this way regardless of entry type. That said, they can be used to correct many common mistakes made by commercial importers.

Related: US Import Duties: Find Rates, Calculate Costs, and Pay CBP

Reasons to File a PSC

The main reason to submit a PSC is to correct erroneous data on an entry summary. This is a legal obligation explained in Title 19 of the Code of Federal Regulations.

 Some examples of data fields that can be amended using this process are:

  • HTSUS/ADCVD numbers
  • Weight, manifest quantity, and HTSUS net quantity
  • Shipment value and duty/IR tax owed
  • Importing carrier and mode of transport
  • Country of origin and exporting country

Finding and correcting these errors before CBP liquidation can keep you from paying fines later if the government audits your import transactions. Filing a PSC requires Automated Broker Interface (ABI) software and access to CBP’s Automated Commercial Environment (ACE) portal, which means a broker must usually submit the PSC on behalf of the importer of record (IOR).

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Examples of How to Use PSCs in Importing

Importers use tariff and duty rates to estimate the import taxes they will owe to CBP and rely on their export partners to provide invoices that accurately reflect the quantity and types of merchandise being shipped. 

In the following scenarios, you’ll see how a PSC is used to make changes to the entry summary that can prevent punitive actions from CBP.

  1. Example: Valuation Change of a Received Shipment Prior to Liquidation

An auto parts manufacturer orders a number of machining components from a supplier in Germany to make custom exhaust parts from imported steel and aluminum materials such as pipes. The components are valued at $100,000 on the entry summary. The shipment is cleared, released, and brought to the manufacturer.

However, a compliance audit three months later reveals that before the components were built, the auto parts manufacturer paid the same supplier in Germany $10,000 to develop the initial engineering drawings for them. This first transaction qualifies as a dutiable assist, increasing the declared value of the shipment.

Since the shipment still hasn’t been liquidated by CBP, the importer can submit a PSC to accurately reflect the increased value of the shipment and pay whatever duties and additional fees are due after recalculation. Doing so lets the importer avoid potential fines that could come from a CBP audit. 

  1. Example: Changing an Incorrect HTS Code

An ecommerce business imports a shipment of toy flutes intended for children between 3 and 12 years of age. On the entry summary, they classify the goods under HTS code 9205.90.60 as flutes. This classification carries a 4.9% ad valorem duty.

This turns out to be a mistake as an import audit later shows that instruments which can be classified as toys fall under a different chapter of the HTS. The toy flutes should have been imported under a chapter 95 code indicating toys for children aged 3 to 12 years. Such goods have a free general rate of duty.

By submitting a PSC prior to liquidation, the business is able to correct this error and eventually pursue a refund for the overpaid duties due to misclassification.

Speaking of refunding duties, a PSC is just one of a few avenues that can eventually lead to a drawback, and some importers conflate corrections with another option: protests.

Post Summary Correction vs Protest

While a PSC can be submitted to correct information within the previously mentioned time window, filing a protest differs significantly in the following two ways:

  • Protests can be filed within 180 days after liquidation to correct information on entry documents
  • You can also use a protest to contest a decision from CBP, an option not available for post summary corrections

There are some situations that will require you to file a protest even if you’ve already filed a PSC. Chiefly, if liquidation occurs while the PSC is still under review, the correction will be considered void and you will need to use the CBP protest process instead. Timing plays an important hand in the acceptance or refusal of your summary correction.

Related: CBP Clearance Process: A Guide for Importers

Timeline of a PSC

As the earlier scenarios illustrated, a post summary correction often starts during an internal compliance audit or transactional audit. Once a mistake has been found, there are some important timelines within which you’ll need to work during the PSC process.

The PSC must be filed within the earlier of the following two dates: 300 days from your shipment’s entry date or within 15 days of its scheduled liquidation by CBP. Exceptions to the 300 day rule can be made if the importer successfully files a liquidation extension, but the filing still must be made 15 days or more prior to the new date.

There are also exceptions for entry types 03, 07, and 06 if your cargo received a suspended status due to AD/CVD regulations. 

Keep Your Cargo Compliant With USA Customs Clearance

Since submitting a post summary correction requires expensive software that many importers don’t have or can’t access, they usually rely on licensed customs brokers to make the actual filing with CBP. 
If you have an entry in need of correction, call us at (855) 912-0406 or fill out a contact form online to get started avoiding costly repercussions.

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