US Customs and Border Protection (CBP) now requires Automated Clearinghouse (ACH) electronic payment for any additional duties, taxes, or fees resulting from a Post-Summary Correction (PSC).
This update took effect August 5, 2026, as part of CBP’s modernization of duty collection through the Automated Commercial Environment (ACE). Under the updated PSC test, cash and check payments are no longer accepted for PSC-related increases in duties.
What is changing with CBP PSC payments?
When submitting payment at the time of a PSC submission, CBP now requires that all increased duty payments from a PSC be made electronically through ACH via a process referred to as single pay. This applies when a correction results in additional duties, taxes, or fees owed.
Importers must be enrolled in an ACH payment program to submit these payments.
How do importers pay PSC duty increases?
Upon submission of the PSC, Mohawk Global will authorize the single payment on your ACH.
Importers have two options when a PSC increases duties owed:
- Pay immediately before liquidation using ACH single pay, or
- Wait for CBP to issue a bill at liquidation
However, if payment is deferred, CBP will not allow additional PSC filings until the prior PSC balance is fully paid and processed.
If you do not have an ACH account, Mohawk Global will coordinate electronic payment with you.
Can you file another PSC before paying the first one?
No. A new PSC cannot be submitted until:
- The full amount of the previous PSC increase is paid, and
- CBP has processed the payment
Partial payments do not allow additional PSC filings.
How is interest handled on PSC adjustments?
Interest related to PSC duty increases cannot be paid at the time of filing the PSC.
Instead:
- CBP calculates interest at liquidation
- A separate bill is issued if interest is owed
What does this mean for importers and brokers?
Importers and customs brokers should ensure:
- ACH payment capability is set up in advance
- PSC workflows account for electronic payment requirements and processes.
- The ACH is a single payment and is not part of CBP’s Periodic Monthly Statement (PMS) process.
- Generally, the debit will occur 2-3 days after the PSC authorization.
- Internal processes prevent delays in filing future PSCs
This change makes electronic payment readiness a key part of PSC compliance.
Why this matters
For companies that frequently use PSCs to correct entries, delays in ACH setup or payment processing can:
- Delay future corrections
- Impact entry flexibility
- Increase administrative processing time
If you have questions about how CBP’s updated PSC payment requirements may affect your import operations, or need support with entry corrections and customs compliance, please contact your Mohawk Global representative.