CBP PSC ACH requirement [What It Changes]

TL;DR

• The CBP PSC ACH requirement is CBP's rule that a Post Summary Correction raising duties, taxes, or fees must be paid electronically through ACH, not by check or cash.

• As of August 5, 2026, you either pay the full increase at filing or wait for CBP's liquidation bill; partial payments are rejected and a later PSC stays blocked until the increase is paid.

• Antidumping or countervailing-duty increases on a PSC must be paid by ACH within three business days; interest on a PSC cannot be paid before liquidation.

• If your importer ID is not enrolled in CBP ACH Debit or ACH Credit, a broker cannot finish a duty-raising correction in ACE, even when the classification or value fix is otherwise ready.

Key Takeaways

• A Post Summary Correction is a full electronic replacement of an accepted, unpaid-liquidation entry summary in ACE, not a sticky note on CBP Form 7501.

• Check and cash for PSC duty increases ended on August 5, 2026; payment authorization now moves through ABI as ACH Debit or ACH Credit.

• Waiting for the liquidation bill keeps cash in the bank until CBP bills, but ACE will not accept a second PSC on that entry until the first increase is paid and processed.

• New ACH Debit enrollment can take 15 business days, so the payment setup is a pre-filing job, not a same-morning workaround at the port.

• After liquidation, the path is a protest under 19 U.S.C. 1514, not another PSC; the 180-day protest clock is a different rail from the 300-day PSC clock.

What the CBP PSC ACH requirement is

The CBP PSC ACH requirement is U.S. Customs and Border Protection's rule that any Post Summary Correction (PSC) which increases duties, taxes, or fees must be remitted electronically through the Automated Clearinghouse, in full, at the time of filing or held until CBP issues a liquidation bill.

That sentence is the whole product. It is not a new tariff. It is not a new HTS chapter. It is a payment-and-queue rule bolted onto the existing PSC test that CBP has run inside the Automated Commercial Environment since 2011.

A two-truck HVAC shop that imports compressors twice a month, a ten-person marketing agency that brings in printed kits from a foreign vendor, and a solo-run clinic that orders diagnostic devices all sit on the same rail as a national importer. Each of them files an entry summary, or a licensed customs broker files it for them. When someone later finds a wrong classification, a missed assist, or a quantity error, the legal duty is to correct the entry before liquidation. The correction used to be finishable with a check at the port listed on the summary. As of August 5, 2026, that port-counter path is closed for a duty-raising PSC. If ACH is not already authorized for the importer, the correction does not go through, the entry stays wrong, and the next correction on that same entry is blocked until the money posts.

This is the same operational class of problem as a missed proof-of-delivery packet or a driver-device outage on a small fleet: the goods already moved, the paperwork is the remaining clock, and a payment setup that looked like a bank form becomes the gate. Teams that already track logistics documents through an automation workflow for the state of logistics should treat ACH enrollment as another required packet, not as a finance-only chore.

What happened, and why now

CBP did not invent Post Summary Corrections in 2026. On June 24, 2011 it published a Federal Register notice creating the PSC test, and on September 22, 2011 it stopped accepting Post Entry Amendments for ACE entry summaries, leaving PSC as the electronic pre-liquidation correction method, as restated on CBP's Post Summary Corrections page (last modified August 6, 2026).

The 2026 change is a payment-channel swap plus a queue lock. According to the July 6, 2026 Federal Register notice at 91 FR 41053, the modifications become operational as of August 5, 2026, and test participants will no longer be able to pay PSC duty, tax, or fee increases by check or cash.

According to Crane Worldwide Logistics, CBP announced those modifications through Federal Register Notice 91 FR 41053 and CSMS #69428352, with an August 4, 2026 trade advisory dated the day before the cutover.

August 5, 2026 is the ACH cutover date. That figure sits in the Federal Register DATES block and in CSMS #69428352, which CBP sent at 11:16 a.m. EDT on August 3, 2026.

The constraint that broke is the old instruction, from 82 FR 2385, that PSC increases be deposited at the port of entry listed on the entry summary. Port cash and checks do not match a national electronic filing system. CBP's revenue program already routes ordinary duty payment through ACH; the PSC test was the holdout. The August 5, 2026 modification closes that holdout.

An August 2026 global trade roundup also flags the August 5, 2026 CBP post-summary correction payment rule and the block on additional corrections until a prior increase is resolved. That roundup is a secondary recap; the binding text is the Federal Register notice and the CSMS bulletin.

The same Federal Register document republishes the whole PSC test, so filers are not hunting six prior notices for the current rule set. Prior notices remain in force except where 91 FR 41053 says otherwise: 76 FR 37136 (June 24, 2011), 78 FR 69434 (November 19, 2013), 81 FR 89482 (December 12, 2016), 82 FR 2385 (January 9, 2017), 82 FR 50656 (November 1, 2017), and 84 FR 40430 (August 14, 2019).

Sources: CBP Post Summary Corrections; 91 FR 41053; CSMS #69428352.

How the payment mechanism works in plain language

A PSC is a complete replacement of the original CBP Form 7501 entry summary. It does not patch one field. It resubmits the whole summary through the Automated Broker Interface CATAIR entry-summary create/update transaction. The ACE CATAIR Entry Summary Create/Update chapter posted July 17, 2026 (v109) is the technical packet brokers already use.

CBP's How to Use ACE table is blunt about the channel: "Make Post-summary Corrections" is marked for ACE via EDI interfaces and is not marked for the ACE Portal. A shop that only has a portal login cannot file the PSC itself. The broker's ABI software files it. That is why ACH setup is a joint importer-and-broker job.

CBP offers ACH Debit and ACH Credit for paying CBP, plus a separate ACH Refund path for money coming back. The PSC rule uses the pay-in paths. CBP's Automated Clearinghouse page (last modified August 5, 2026) describes Debit, Credit, and Refund as the three ACH options; the basic-import ACH instructions that CSMS #69428352 points filers to describe Debit and Credit enrollment in operational detail.

According to CBP's ACH Debit instructions, new ACH Debit applications can take up to 15 business days from the date of receipt, and changes to an existing ACH account should be allowed at least 3 business days.

ACH Debit setup can take 15 business days. That figure is why a Friday classification find cannot be paid on Monday if the importer has never filed CBP Form 400.

ACH Debit works like this. CBP sends a preliminary statement through ABI. The filer reviews it and sends one ACH payment authorization per statement. CBP does not pull the bank account until that authorization arrives. The filer's account is then debited usually two business days after CBP accepts the authorization, as both the ACH page and CSMS #69428352 describe. The ACH Debit Authorization Entry Summary CATAIR chapter (v9, posted August 20, 2026) is the message format for that authorization.

ACH Credit works the other direction. The filer starts the payment at its bank using CBP Form 401, in CCD+ or CTX format with the TXP addendum CBP requires. The transaction must originate at least one day before the settlement date. Once it starts, it cannot be reversed. A mismatch between the amount paid and the amount due goes to manual reconcile and can delay posting.

ACH Refund enrollment in the ACE Portal, required for ACE account holders as of February 6, 2026 on CBP's ACH Refund page, does not enroll you to pay a PSC increase. Refunds are money out of CBP. The CBP PSC ACH requirement is money into CBP.

Teams already routing entry packets through US Tech Automations workflows can add an ACH-enrollment check before a PSC is queued, rather than rebuilding the filing path.

The two clocks: filing and paying

According to CBP's Post Summary Corrections page, PSC 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.

PSC windows close at 300 days or 15 days. ACE automatically rejects a PSC filed outside those timeframes, unless a listed exception applies.

The underlying entry must already be accepted, in CBP control, not under CBP review, not liquidated, and paid. If the summary sits on a Periodic Monthly Statement, CBP says it may be up to 45 days following the entry date before CBP receives payment, and the entry must be "truly" paid before a PSC will be accepted. That 45-day lag is why a shop on monthly statement processing cannot treat "we filed the summary" as "we can correct it tomorrow."

The original entry process on CBP's Entry Summary page still runs on two earlier clocks: cargo release documents within 15 calendar days of arrival, and an entry summary with estimated duties within 10 working days after entry. A PSC is a later overlay on that paid summary, not a substitute for it.

91 FR 41053 then adds the payment fork. Pay the full increase at PSC submission, or wait until CBP issues a bill at liquidation. Partial payment is not accepted. If the filer waits for the bill, ACE will not allow a subsequent PSC until the initial PSC is paid. Interest on the increase will not be accepted before liquidation; CBP bills interest after liquidation under 19 U.S.C. 1505 and 19 CFR 24.3a, which CBP also cites on its basic importing payment page.

AD/CVD is a tighter fork. According to the same Federal Register notice (91 FR 41053), additional AD/CVD from a PSC must be paid via ACH within 3 business days of submitting the PSC.

That three-day AD/CVD clock is not optional wait-for-bill language. The wait-for-liquidation option in the notice is written for the increase "other than AD/CVD."

A rejected PSC may be retransmitted within two business days of the rejection. If it is not, CBP will correct the entry summary and set it for immediate liquidation unless liquidation is already suspended by statute or court order.

Sources: CBP PSC page; CBP ACH; 91 FR 41053; CBP entry summary process; CBP protests.

USTA analysis: enrollment buffer on a 300-day clock

USTA analysis (derived only from the figures cited above): an importer with no CBP ACH account who still wants to pay a duty-raising PSC at filing, rather than wait for a liquidation bill, has to finish enrollment and settlement before the 300-day PSC cutoff.

Inputs: 300 days from entry for a standard PSC (CBP PSC page); 15 business days for a new ACH Debit application and 2 business days from authorization to bank debit (CBP ACH).

Conversion used here, so the arithmetic is checkable: 15 business days × 7/5 = 21 calendar days; 2 business days × 7/5 = 3 calendar days. Combined buffer = 21 + 3 = 24 calendar days. Remaining file-and-pay window = 300 − 24 = 276 days from the date of entry.

Sources for inputs: CBP Post Summary Corrections; CBP ACH Debit. Derived remaining-day figures are USTA analysis, not a CBP clock. This conversion ignores federal holidays and the earlier-of-300-days-or-15-days-before-liquidation rule, both of which can shorten the remaining window further.

If the importer is already on ACH, the 24-day buffer does not apply and the binding limit is the 300/15 PSC clock, plus the 3-business-day AD/CVD pay rule when that merchandise is on the line. If the importer is on Periodic Monthly Statement, the "truly paid" lag of up to 45 days can eat the front of the window before a first PSC is even eligible.

A US Tech Automations workflow that matches broker statements to unpaid PSC increases is a model swap on the existing document route, not a new customs system.

What a PSC can and cannot change

Eligible entry types, from CBP's PSC page and 91 FR 41053, are 01, 02, 03, 06, 07, 21, 22, 23, 31, 32, 34, 38, 51, and 52. The only permitted entry-type change via PSC is 01 to 03 or 03 to 01.

Revenue and non-revenue changes may both be reported. Filers must send at least one reason code and a text explanation; CBP's PSC page allows up to five reason codes at header and/or line level on a single PSC, with extra detail in the description field of the CATAIR transaction.

Data that cannot be changed via PSC includes importer of record, date of entry, port of entry, bond and surety code, consolidated summary indicator, live entry indicator, Periodic Monthly Statement, reconciliation issue code, location of goods, and cargo-release certification indicators (including DOT, FDA, and other PGA grouping). New bond data will not be accepted through a PSC; the bond that attached at entry stays obligated, including any later superseding bond.

A PSC flagged-issue conflict also matters. An entry summary flagged for reconciliation may only be corrected by a PSC that does not affect the flagged issue. Reconciliation is a different post-summary tool. According to 19 U.S.C. 1484, a reconciliation must be filed not later than 21 months after the importer declares intent to file it (90 days after CBP advises that the AD/CVD review period is complete, for those issues).

PSC and reconciliation are not substitutes. PSC fixes known entry-summary errors before liquidation. Reconciliation is the planned later true-up for value, 9802, certain classification fights, and FTA claims that were flagged at entry. CBP's reconciliation page sets FTA filing at 12 months from the oldest flagged entry and value/classification/9802 at 21 months, with no extensions on those deadlines.

The legal duty to correct sits in 19 U.S.C. 1484 and 19 U.S.C. 1485. Section 1484 requires reasonable care on classification, value, and duty. Section 1485 requires a declaration that invoice prices and other statements are true, and that the importer will produce later papers that show those statements are not true. A PSC is how ACE lets the trade keep that promise before liquidation. CBP's PSC page states that a filer submits a PSC because they are legally obligated to correct an entry per 19 U.S.C. 1484 and 1485, operating under 19 CFR 101.9(b) ACE prototypes.

There is no limit on the number of PSCs for one entry inside the allowed window, except that PSCs that are team reviewed are not eligible for multiple PSC submissions, and a subsequent PSC is blocked while a prior duty increase remains unpaid. A PSC cannot be filed on an entry that is associated with a protest.

CSMS #69635410, sent August 24, 2026, adds a later limit: error F883, "PSC NOT ALLOWED TO MODIFY IEEPA HTS," deployed to certification and production on August 21, 2026, blocks a PSC on FTZ entry type 06 if the IEEPA HTS is modified in any way. That is a separate ACE validation, not part of the August 5 payment rule, and it is already live as of late August 2026.

Suspended entries, AD/CVD, and EAPA

The August 2026 notice also widens, and formally records, a filing-window exception CBP says it has used in practice since 2022. A filer may submit a PSC outside the 300-day timeframe when liquidation is suspended beyond 300 days after the date of entry and the entry has an associated suspension basis at the time of filing: CVD Suspend, ADD Suspend, AD/CVD Suspend, Subject to EAPA, or Subject to Court Injunction.

CBP's Enforce and Protect Act page describes EAPA as the 2016 process (TFTEA Title IV, section 421, signed February 24, 2016; implementing regulations issued August 22, 2016) for investigating AD/CVD evasion. Entries sitting under an EAPA suspension can now be corrected by PSC past day 300 if the suspension basis is still active. That is useful for a manufacturer that imported parts later pulled into an evasion case and needs the entry data to match what the investigation file says.

The same exception helps importers with court-injuncted entries. The Court of International Trade has nationwide jurisdiction over civil actions arising out of U.S. customs and international trade laws; CBP's EAPA page points filers there for judicial review after administrative review. A PSC during an injunction is still a data correction, not a substitute for that lawsuit.

AD/CVD merchandise also collides with the payment rule in two ways. First, the 3-business-day ACH pay requirement for an AD/CVD increase. Second, the 01-to-03 (or 03-to-01) entry-type change, which is the only type change PSC allows, is exactly the change shops make when they discover merchandise is subject to an AD/CVD case. That type change often raises deposits. Without ACH, the type-change PSC is the filing that fails.

The ACE FAQ still applies around the edges: ACE is the Single Window, ABI remains the method for transmitting entries and entry summaries, and outages are announced through the Cargo Systems Messaging Service. A PSC payment authorization sent during an ACE debit window will sit until the system is back; planned production outages include Tuesday and Thursday 5 a.m.–7 a.m. windows and a Saturday 10 p.m.–Sunday 4 a.m. window on CBP's How to Use ACE page.

Small fleets that already compare dispatch stacks, including shops reading AscendTMS vs McLeod workflow notes or shopping ELD devices for small trucking fleets, should put the importer ACH status next to the broker's ABI health check. A truck that cleared the ramp can still be carrying an unpaid classification error.

After liquidation, PSC is the wrong tool

Once an entry summary is liquidated, CBP's PSC page says the filer's options to correct it are a prior disclosure or a protest. CBP's Protests page, citing 19 U.S.C. 1514, states that a protest of a decision shall be filed within 180 days after, but not before, the date of liquidation or reliquidation.

A PSC that is waiting for a liquidation bill is still pre-liquidation. The moment CBP liquidates and bills, the ACH-at-filing option is gone for that increase, interest can be billed, and the protest clock starts. Waiting for the bill is a cash choice, not a way to keep editing the summary forever.

If a filer requests accelerated liquidation on a PSC, CBP will strive to process within 60 calendar days from the date it was received. If a liquidation extension is needed, CBP says to get the extension approved before filing the PSC; after an extension, the PSC still has to be filed 15 days before the scheduled liquidation date.

Importers who already push commercial invoices and packing lists through US Tech Automations can attach the CBP Form 400 or Form 401 packet to the same folder the broker already watches.

Signal vs Speculation

Demonstrated fact (sourced): As of August 5, 2026, CBP requires ACH for PSC duty, tax, and fee increases and no longer accepts check or cash for those increases, per 91 FR 41053 and CSMS #69428352. Full payment or wait-for-liquidation-bill is the fork; partial payment is rejected; a later PSC is blocked until the increase is paid. AD/CVD increases must be paid by ACH within three business days. Interest cannot be paid before liquidation. The 300-day / 15-day PSC clock, the 45-day PMS lag, the 15-business-day ACH Debit enrollment, and the EDI-only PSC channel are published CBP rules. The suspended-entry exception (AD/CVD, EAPA, court injunction) is now in the Federal Register, not only on a web page. Error F883 blocking IEEPA HTS changes on type 06 PSCs deployed August 21, 2026.

Our read: If X holds — if CBP keeps moving every remaining port-counter payment onto ACH, the way refunds already moved into the ACE Portal on February 6, 2026 — then over the next 12–36 months small and mid-size importers will feel this as a broker-readiness problem, not as a tariff-rate problem. Shops that import a few times a year will discover the CBP PSC ACH requirement the first time a classification error raises duty and the broker's ABI bounce says the increase cannot be authorized. The ones that enroll CBP Form 400 or 401 now will treat a PSC as a document correction. The ones that do not will treat it as a cash-and-queue freeze, then a liquidation bill, then a protest. We do not forecast a dollar volume of blocked PSCs; CBP has not published that count. We do expect more ACE error-dictionary rows in the same family as F883, because once payment is electronic, the next controls are data-element locks.

What to do this week

Confirm with the broker, in writing, that the importer of record is on ACH Debit or ACH Credit for CBP, not merely that the broker itself pays its own bills by ACH. File CBP Form 400 or 401 if the account is missing, and start the 15-business-day clock before the next likely correction. Ask whether any open entries are on PMS and not yet "truly" paid. Ask whether any entries are suspended for AD/CVD, EAPA, or injunction and now eligible for a late PSC. Do not send a duty-raising PSC on the assumption that a port check can catch it. Subscribe to CSMS so the next error code is not a surprise.

The same checklist belongs in an agentic workflow that already moves invoices, packing lists, and broker packets: enrollment status, unpaid PSC increase, liquidation date minus 15 days, and AD/CVD three-day pay. US Tech Automations publishes that workflow path for teams that want the checklists in one place.

FAQs

What is the CBP PSC ACH requirement?

The CBP PSC ACH requirement is CBP's rule that a Post Summary Correction which increases duties, taxes, or fees must be paid electronically by ACH, not by check or cash. The filer pays the full increase at filing or waits for CBP's liquidation bill, with no partial payments, as set out in 91 FR 41053.

When did the CBP PSC ACH requirement take effect?

It took effect August 5, 2026. CBP's CSMS #69428352 states that as of that date filers will no longer be able to pay these increases via check or cash.

Can I still pay a PSC duty increase by check at the port?

No. Check and cash for PSC-related duty, tax, and fee increases ended on August 5, 2026. Payment authorization is submitted electronically through ABI as ACH Debit or ACH Credit, using the process on CBP's ACH page.

What happens if I wait for CBP to bill at liquidation?

ACE will not allow a subsequent PSC on that entry until the increase from the unpaid PSC is paid in full and processed. Interest still cannot be paid before liquidation; CBP bills interest after liquidation. The wait-for-bill option in 91 FR 41053 is written for increases other than AD/CVD.

How long do I have to file a PSC after entry?

The standard window is 300 days from the date of entry or 15 days before scheduled liquidation, whichever is earlier, per CBP's PSC page. Suspended AD/CVD, EAPA, or court-injunction entries can be filed later while the suspension basis is active. After liquidation, use a protest or prior disclosure, not a PSC.

Does enrolling in ACH Refund satisfy the CBP PSC ACH requirement?

No. ACH Refund, described on CBP's refund page, is how CBP sends money to you. Paying a PSC increase requires ACH Debit or ACH Credit enrollment so CBP can receive money from you.

What if ACE rejects my PSC?

Retransmit within two business days of the rejection, per 91 FR 41053. If you do not, CBP may correct the summary and set it for immediate liquidation unless liquidation is already suspended. Team-reviewed PSCs cannot be stacked, and error F883 now blocks IEEPA HTS changes on type 06 PSCs.

Glossary

• Post Summary Correction (PSC). An electronic, pre-liquidation replacement of an ACE entry summary used to correct classification, value, quantity, origin, and other data that can change duty liability.

• CBP PSC ACH requirement. CBP's August 5, 2026 rule that duty, tax, and fee increases from a PSC must be paid by Automated Clearinghouse, in full, at filing or at the liquidation bill, with no check, cash, or partial payment.

• Automated Clearinghouse (ACH). The bank-transfer system CBP uses for Debit, Credit, and Refund of duties, taxes, and fees; Debit and Credit are the pay-in paths for a PSC increase.

• Automated Commercial Environment (ACE). CBP's Single Window system for import and export processing, including entry summary, PSC, statements, and reports.

• Automated Broker Interface (ABI). The EDI channel brokers use to transmit entry summaries, PSC filings, and ACH payment authorizations into ACE; the ACE Portal does not file PSCs.

• Liquidation. CBP's final computation of duties on an entry summary; after liquidation, PSC is unavailable and a protest under 19 U.S.C. 1514 is the administrative contest path.

• Periodic Monthly Statement (PMS). A statement-processing option that can delay CBP's receipt of payment by up to 45 days after entry; a PSC will not accept until that statement is truly paid.

• Enforce and Protect Act (EAPA). The 2016 AD/CVD evasion-investigation process; entries with an active EAPA suspension basis may be corrected by PSC after the ordinary 300-day window.

If you already move broker packets in software, map the ACH and PSC checks onto that workflow instead of treating August 5 as a one-time customs memo.