CBP Makes ACH the Only Way to Pay a Post Summary Correction From August 5, 2026 — Checks and Cash Are Refused, Partial Payments Are Refused, and You Cannot File a Second PSC on an Entry Until the First One's Duty Increase Has Been Paid in Full
CBP issued CSMS #69428352 on August 3, 2026, announcing four changes to how Post Summary Corrections are processed, effective August 5, 2026. A PSC is the mechanism importers use to fix an entry summary after the fact — a wrong HTS code, a wrong declared value, a missed Chapter 98/99 claim — and for sellers importing their own inventory it is the ordinary route for correcting a duty error. From August 5, any increase in duties, taxes, or fees resulting from a PSC must be remitted electronically through ACH; checks and cash are no longer accepted. CBP also stopped accepting partial payments, deferred all interest to after liquidation, and opened the standard 300-day filing window for entries whose liquidation is suspended. The underlying authority is Federal Register notice 91 FR 41053, "Modification and Clarification of the National Customs Automation Program Test Regarding Post Summary Corrections," issued July 6, 2026.
Real-World Impact
The standard PSC filing window is 300 days from the date of entry. Under the new rules an entry with an active suspension basis — an AD/CVD case, an EAPA investigation, or a court injunction — can be corrected past day 300 for as long as liquidation stays suspended, which is the one change here that gives importers more room rather than less.
Key Points
- CSMS #69428352 was issued August 3, 2026 and the changes take effect August 5, 2026, under Federal Register notice 91 FR 41053 published July 6, 2026
- Any increase in estimated duties, taxes, or fees resulting from a PSC must now be paid electronically via ACH — CBP will no longer accept payment by check or by cash for PSC increases, and ACH payment authorization is submitted through the Automated Broker Interface (ABI)
- CBP will not accept partial payments on a PSC: the filer either pays the full amount due at the time the PSC is submitted, or waits until CBP issues a bill at liquidation
- A subsequent PSC cannot be filed on an entry until any increase from a previously filed PSC has been paid in full and processed by CBP — so choosing to wait for the liquidation bill blocks further corrections on that entry in the meantime
- Interest associated with a PSC duty increase may not be paid before liquidation; CBP calculates any applicable interest and bills it separately after liquidation
- PSCs may now be filed beyond the standard 300-day filing period when the entry has an active suspension basis — antidumping and countervailing duty cases, EAPA investigations, and court injunctions
What You Should Do Now
- 1Confirm with your customs broker that an ACH payment authorization is set up and working through ABI before you next need to file a PSC — the change is already in effect, so a broker still set up to remit by check cannot pay a duty increase at all
- 2Decide your default for each entry: pay the increase in full at submission, or wait for the bill at liquidation. Waiting preserves cash but blocks any further PSC on that entry until the first increase is paid and processed
- 3If you have entries with more than one known error, sequence them into a single PSC rather than filing serially, since the second filing is gated on the first being paid in full
- 4Review any entries currently under AD/CVD, EAPA, or injunction-based suspension that you had written off as past the 300-day window — those are now correctable again while the suspension holds
- 5Budget interest separately from duty. Interest on a PSC increase can no longer be paid up front and will arrive as its own CBP bill after liquidation, which can be well after the corrected entry has left your books