CUSTOMS LITIGATION | 2026-10-05

Deemed Liquidation Under 19 U.S.C. § 1504: The One-Year Clock That Can Lock In — or Quietly Forfeit — a California Importer’s IEEPA Tariff Refund

Every entry carries a statutory liquidation clock. When Customs misses it, the entry is “deemed liquidated” by operation of law at the rate the importer declared. For importers waiting on IEEPA refunds, understanding when that clock runs, when it is suspended, and when it restarts can be the difference between a preserved refund and a time-barred one.

Liquidation is the moment U.S. Customs and Border Protection makes its final calculation of the duties owed on an imported entry. It is also the event that starts the 180-day clock to file a protest — and, for importers pursuing refunds of tariffs imposed under the International Emergency Economic P

Most importers think of liquidation as something Customs does to them. In reality, the Tariff Act builds in a deadline that runs against the government: if CBP does not liquidate an entry within a fixed period, the law liquidates it automatically. Knowing when that happens, and at what rate, is essential for any California importer tracking an IEEPA refund across hundreds or thousands of entries.

What Liquidation Is, and Why It Matters for Refunds

Liquidation is defined in the customs laws as the final computation or ascertainment of duties on an entry. Until an entry liquidates, the duties the importer deposited at entry are provisional. Once it liquidates, CBP’s calculation becomes final and conclusive against everyone — the importer and the government alike — unless a party files a timely protest under 19 U.S.C. § 1514 or the entry is reliquidated.

That finality is the entire reason liquidation status matters to refund claimants. The refund of excess duties — including duties deposited under the IEEPA tariffs the Supreme Court invalidated on February 20, 2026 — flows through liquidation or reliquidation. An importer whose entries have not yet liquidated generally has administrative avenues open. An importer whose entries have finally liquidated, and whose protest period has run, may be left with no administrative remedy at all. Because of this, the single most important compliance fact about any entry is often not the duty rate but the liquidation date.

The One-Year Rule in § 1504(a)

The default rule is straightforward. Under 19 U.S.C. § 1504(a), an entry of merchandise not liquidated within one year from the date of entry (or, for certain entries, from the date of final withdrawal or the date of deposit of estimated duties) is deemed liquidated at the rate of duty, value, quantity, and amount of duty asserted by the importer of record at the time of filing. Congress enacted this rule to prevent entries from lingering indefinitely in an unliquidated state and to give importers certainty about their ultimate liability.

The phrase “asserted by the importer of record” is the key. A deemed liquidation does not occur at whatever rate CBP might have intended to apply. It occurs at the rate the importer declared on its own entry summary. For an importer that properly declared and deposited IEEPA duties, a deemed liquidation would ordinarily lock in those duties as paid. For an importer that declared a lower rate and deposited less, a deemed liquidation can fix liability at that lower, self-asserted amount. The direction of the benefit depends entirely on what the importer put on the entry.

How CBP Stops the Clock: Extension Under § 1504(b)

The one-year clock is not absolute. Section 1504(b) permits CBP to extend the liquidation period if (1) information needed to properly appraise or classify the merchandise is not available, (2) liquidation is extended at the importer’s request for good cause, or (3) certain protective interests warrant it. Each extension runs for up to one year, and CBP must provide notice of the extension to the importer, surety, and any authorized agent.

There is an outer limit. CBP may not extend the total liquidation period beyond four years from the date of entry. If an entry remains unliquidated at the end of the maximum extension period, it is deemed liquidated at the importer’s asserted rate — the same operation-of-law result as under the one-year default, just measured from a longer runway. Importers reviewing their ACE data should treat an “extended” status not as an open-ended delay but as a defined clock with a hard four-year ceiling.

Suspension Is Different From Extension — and It Controls IEEPA Entries

Extension and suspension are frequently confused, but they operate differently and have different triggers. An extension is a discretionary administrative decision by CBP to give itself more time. A suspension is a legal freeze on liquidation required by statute or by court order. Under 19 U.S.C. § 1504(d), when liquidation is suspended, the suspension stops the clock entirely until it is removed.

Suspension is the mechanism that has governed many IEEPA-affected entries. When litigation challenging the IEEPA tariffs proceeded through the Court of International Trade and the courts entered orders affecting the treatment of those entries, liquidation of affected entries could be suspended rather than allowed to proceed. A suspended entry cannot deem-liquidate while the suspension is in place, because the event that would otherwise trigger § 1504(a) is frozen. For importers, this means an entry can sit far past the one-year mark — lawfully unliquidated — precisely because a suspension is holding the clock.

The Six-Month Clock After a Suspension Is Removed

The most litigated part of § 1504 is what happens when a suspension ends. Under § 1504(d), once the suspension of liquidation is removed, CBP must liquidate the entry within six months after receiving notice of the removal of the suspension. If CBP fails to liquidate within that six-month window, the entry is deemed liquidated at the rate asserted by the importer at the time of entry.

The Federal Circuit has set out the elements of a deemed liquidation under this provision. In Fujitsu General America, Inc. v. United States, the court held that a deemed liquidation occurs only when (1) the suspension of liquidation that was in place has been removed, (2) CBP received notice of the removal of the suspension, and (3) CBP did not liquidate within six months of receiving that notice. All three elements must be satisfied. The notice element is strict: the six-month clock does not begin until CBP actually receives legally operative notice that the suspension has ended. This is why the precise sequence and documentation of a suspension’s removal can decide whether an entry has deem-liquidated and at what rate.

Why This Matters So Much to IEEPA Refund Claimants

For a California importer that deposited IEEPA duties, the § 1504 framework creates several very different outcomes, and the importer’s remedy depends on which one applies:

Entry still suspended. If liquidation remains suspended pending the IEEPA litigation, the entry has not liquidated and will not deem-liquidate while the suspension holds. The refund posture is still open, and the importer’s job is to preserve the claim and monitor for the suspension’s removal.
Suspension removed, CBP liquidates with the refund. If the suspension is lifted and CBP liquidates the entry reflecting the elimination of IEEPA duties, the importer receives its refund with interest through the ordinary liquidation and disbursement process.
Suspension removed, CBP liquidates with IEEPA duties still assessed. If CBP liquidates and improperly retains the IEEPA duties, the importer must protest within 180 days under § 1514 to preserve the refund — the deemed-liquidation safety net may not help where CBP did in fact act.
Suspension removed, CBP does nothing for six months. If CBP lets the six-month window lapse without liquidating, the entry deem-liquidates at the importer’s asserted rate. Whether that helps depends on what the importer asserted at entry.

The practical lesson is that an importer cannot sit back and assume the system will refund IEEPA duties automatically. The same statute that can preserve a claim through suspension can also foreclose one through a quiet deemed liquidation followed by an expired protest period.

Finding the Liquidation Status of an Entry

Liquidation is posted. Historically, CBP published a bulletin notice of liquidation; today, the official notice of liquidation is posted electronically on CBP’s website, and that electronic posting is the legal notice of liquidation. Importers and their brokers can see liquidation status and dates in the Automated Commercial Environment (ACE), and the liquidation date shown there controls the 180-day protest deadline. Because deemed liquidations occur by operation of law, they are not always accompanied by an affirmative communication, so an importer who waits for a letter may miss the event entirely.

For a portfolio of IEEPA-affected entries, the only reliable approach is systematic: pull liquidation status for every affected entry, identify which entries are suspended, extended, or liquidated, record the liquidation date for each liquidated entry, and calendar the protest deadline that runs from it. Entries that have deem-liquidated require the same protest analysis as entries CBP affirmatively liquidated.

Reliquidation and the Interaction With Protests

Liquidation is not necessarily the last word. Under 19 U.S.C. § 1501, CBP may voluntarily reliquidate an entry within 90 days of the original liquidation to correct errors. More commonly for refund claimants, a timely protest under § 1514 asks CBP to reliquidate to correct the duties assessed. A protest must be filed within 180 days of the date of liquidation — including a deemed liquidation — and must be filed by an authorized party. If CBP denies the protest, the importer may challenge that denial at the Court of International Trade under 28 U.S.C. § 1581(a), provided all liquidated duties have been paid and the summons is filed within 180 days of the denial.

Because a deemed liquidation starts the protest clock just as an affirmative liquidation does, the worst outcome for an IEEPA claimant is often not an adverse liquidation but an unnoticed one. An entry that deem-liquidated with IEEPA duties intact, and whose 180-day protest window then closed, can convert a straightforward refund into a lost one.

Practical Steps for California Importers

Importers along the ports of Los Angeles, Long Beach, Oakland, and San Diego process large volumes of entries, which makes disciplined liquidation tracking essential rather than optional. A workable program includes:

Entry-level liquidation calendar. Maintain a record of every IEEPA-affected entry with its entry date, current liquidation status, any extension or suspension, and the date each clock would otherwise run.
Suspension monitoring. Track the status of the litigation and any orders that suspend or remove suspension of liquidation, because removal starts the six-month § 1504(d) clock.
Protest deadline control. For every liquidated or deem-liquidated entry, calendar the 180-day protest deadline immediately, and treat deemed liquidations as liquidation events that trigger it.
Documentation of notice. Preserve records showing when any suspension was removed and when CBP received notice, since those facts control whether and when a deemed liquidation occurred.

Handled proactively, § 1504 is a source of certainty. Ignored, it is a trap that runs silently in the background of every entry.

The Measuring Date: When the One-Year Clock Starts

Because the entire framework runs on dates, importers need to know when the clock begins. For most consumption entries, the one-year period under § 1504(a) runs from the date of entry, which is generally the date on which the merchandise is released or the entry and entry summary are filed in the ordinary course. For merchandise withdrawn from a bonded warehouse, the period runs from the date of withdrawal, and for certain reconciliation and drawback contexts the statute and regulations specify other triggers. CBP’s regulations implementing liquidation, including the posting of notices and the treatment of suspensions and extensions, appear at 19 CFR Part 159, and importers should align their internal records with the dates CBP uses rather than their own receipt or payment dates.

The reason precision matters is that a single entry’s deadline cascades into everything else. The one-year date determines when a default deemed liquidation would occur; an extension resets that date in one-year increments up to the four-year ceiling; and a suspension pauses the calculation entirely. An importer that mislabels an entry’s status — treating an extended entry as suspended, or vice versa — will miscalculate when liquidation occurs and, with it, when the 180-day protest window opens and closes.

Deemed Liquidation’s History in Trade-Remedy Cases

The most heavily litigated deemed-liquidation disputes historically arose in antidumping and countervailing duty cases, and they illuminate how § 1504(d) works in the IEEPA context. In those cases, liquidation of entries is suspended while the Department of Commerce conducts administrative reviews. When Commerce completes a review, it sends liquidation instructions to CBP, and the suspension is removed. The recurring question has been precisely when CBP “received notice” of the removal so that the six-month clock began — and whether CBP’s failure to liquidate within six months resulted in a deemed liquidation at the rate the importer asserted at entry, which was often far lower than the rate Commerce ultimately set.

The Federal Circuit’s decisions in this line, including Fujitsu General America, Inc. v. United States, established that the notice triggering the six-month period must be unambiguous and that the deemed liquidation, when it occurs, fixes the duties at the importer’s asserted rate regardless of what the agency intended. The same mechanics apply to any suspension affecting IEEPA entries: the removal of the suspension, CBP’s receipt of notice, and the six-month window together determine whether and at what rate a deemed liquidation occurs. Importers tracking IEEPA entries should treat the removal of a suspension as a triggering event to be documented, not a routine status change.

What Rate Governs, and Why Importers Sometimes Benefit

A deemed liquidation fixes duties at the rate, value, quantity, and amount of duty the importer of record asserted at entry. This is a double-edged feature. An importer that declared and deposited IEEPA duties would see those duties locked in by a deemed liquidation, which is unhelpful if the goal is a refund. But an importer that, consistent with a good-faith legal position and proper disclosure, asserted a rate that excluded or reduced the challenged duties could find that a deemed liquidation fixes liability at that lower asserted amount. The outcome is entirely a function of what the importer put on its own entry summary, which is why entry-level positions taken during the IEEPA period continue to matter long after the merchandise has cleared.

None of this is a substitute for a timely protest where CBP affirmatively liquidates with duties the importer wants refunded. The deemed-liquidation rules are a backstop that operates only when CBP fails to act within the statutory periods; they do not undo an affirmative liquidation, and they do not extend the 180-day protest deadline that an affirmative or deemed liquidation starts.

Common Mistakes That Cost Importers Their Refunds

Across large entry portfolios, the same errors recur:

Waiting for a letter. Because deemed liquidations occur automatically and liquidation notices are posted electronically, importers who wait for an affirmative communication can miss both the liquidation and the protest deadline that follows.
Confusing extension with suspension. An extended entry has a defined four-year ceiling; a suspended entry is frozen until the suspension is removed. Treating them interchangeably produces wrong deadlines.
Ignoring the removal of a suspension. When a suspension is lifted, the six-month § 1504(d) clock starts on notice. Importers who do not monitor for removal can be surprised by a deemed liquidation.
Failing to calendar protests off deemed liquidations. A deemed liquidation starts the 180-day protest clock just as an affirmative one does; missing that window forecloses the administrative refund route.

Frequently Asked Questions

What does “deemed liquidated” actually mean?

It means an entry becomes finally liquidated automatically, by operation of law, because CBP did not liquidate it within the statutory period. The liquidation occurs at the rate, value, quantity, and amount of duty the importer of record asserted when it filed the entry summary — not at some rate CBP later intended to apply.

How long does Customs have to liquidate my entry?

The default under 19 U.S.C. § 1504(a) is one year from the date of entry. CBP can extend that period in one-year increments, but not beyond four years total. If liquidation is suspended by statute or court order, the clock is frozen until the suspension is removed, and CBP then has six months from receiving notice of removal to liquidate.

Does a deemed liquidation help or hurt my IEEPA refund?

It depends on what you asserted at entry and whether CBP has already acted. A suspension pending the IEEPA litigation keeps your claim open. A deemed liquidation at your asserted rate can lock in a favorable position, but if CBP affirmatively liquidated with IEEPA duties still assessed, you must protest within 180 days to recover them. The safest course is to track liquidation status rather than rely on any single outcome.

How do I know when my entry liquidated?

The official notice of liquidation is posted electronically on CBP’s website, and liquidation status and dates are visible in ACE. Because deemed liquidations happen automatically and may not generate a separate letter, importers should monitor liquidation status directly rather than wait for a notice.

What happens if I miss the protest deadline after a deemed liquidation?

A protest must be filed within 180 days of the liquidation date, including a deemed liquidation. If that window closes with IEEPA duties still assessed, the administrative refund route is generally foreclosed, and recovering the duties may require litigation — if any avenue remains at all. This is why unnoticed deemed liquidations are the primary risk.

Related California Customs & IEEPA Refund Guides

Speak With a California Customs Attorney

Deemed liquidation turns on dates, suspensions, and notice — details that are easy to overlook and costly to miss across a large entry portfolio. Trembach Law Firm advises California importers on liquidation tracking, protest and litigation deadlines, and the preservation of IEEPA and other customs refund claims. To review your entries and deadlines, call (213) 645-2246 for a consultation.

Contact Trembach Law Firm at (818) 514-7680 for a confidential consultation.

Trembach Law Firm | 27001 Agoura Road, Suite 350, Calabasas, CA 91301