Deadlines: Liquidation + the 180-Day Clock

2026 context: The Supreme Court held IEEPA doesn’t authorize tariffs (Feb. 20, 2026) and CBP stopped collecting IEEPA duties effective Feb. 24, 2026. If tracking IEEPA refund deadlines, make sure your entry list isolates historical IEEPA duties from the separate Section 122 surcharge that began Feb. 24. (Opinion PDF, CBP CSMS #67834313, CBP CSMS #67844987)

Informational only — not legal advice.

1) What “liquidation” means (plain English)

Liquidation is CBP’s final computation/assessment of duties on an entry — the point when the amounts become final unless you take timely action. That finality matters because the protest statute generally makes CBP decisions “final and conclusive” unless a timely protest is filed. See 19 U.S.C. §1514.

Liquidation timing is governed by statute and can involve extensions, suspensions, and “deemed liquidation” concepts in some circumstances. See 19 U.S.C. §1504.

Why this matters operationally: CBP explains that your relief options depend on liquidation status, and (in general) once liquidation occurs, the relief mechanism is a protest. Start with CBP’s overview: CBP — Protests.

2) The core deadline rule (the part to memorize)

CBP summarizes the practical rule like this:

• “Within 180 days of liquidation, the importer, their broker, or attorney can contest CBP decisions … with a protest …” (CBP — Protests)

The statute says a protest “shall be filed … within 180 days after but not before … the date of liquidation or reliquidation” (with a separate timing rule where liquidation is “inapplicable”). See 19 U.S.C. §1514. CBP’s regulations implementing the protest process live in 19 CFR Part 174, including 19 CFR 174.12.

Actionable takeaway: your “act-by date” is usually:

deadline = liquidation date + 180 days

In practice, the importers who miss deadlines typically didn't track liquidation as a per-entry field. The 180-day clock isn't hard to compute — the hard part is knowing when each entry liquidated.

3) The legal rule in “operational English”

If you’re building a workflow (or software), here’s the rule to operationalize:

1. Start from an entry list. You can’t manage what you can’t identify. At minimum, you need an entry number and a way to look up liquidation status/date. Form 7501 (“Entry Summary”) is the canonical artifact name for the entry summary, and CBP publishes both an overview page and the official PDF: CBP Form 7501 overview and CBP Form 7501 PDF.
2. Treat liquidation status as a first-class field. CBP explicitly ties relief options to liquidation status. See CBP — Protests.
3. Use the liquidation-driven clock by default. In general, the protest window is 180 days after liquidation (not “180 days after you discovered the issue”). See 19 U.S.C. §1514.
4. Handle edge cases conservatively. The statute also includes a 180‑day clock where liquidation is “inapplicable,” and liquidation timing can be extended/suspended. See 19 U.S.C. §1514 and 19 U.S.C. §1504.
5. Plan the filing workflow early. CBP states protests may be filed electronically in ACE or by paper at the port, and that electronic filing requires an ACE protest filer account. See CBP — Protests and CBP — Protest (ACE guidance).

4) How to compute deadlines for many entries (step-by-step)

Step 1 — Make an entry list (even a rough one)

At minimum, capture:

• Entry number
• Port code (or port name)
• Entry date (helpful, but not sufficient for deadline tracking)

If you already have 7501s, the entry number is right there. If you don’t, ask your broker/carrier for the entry numbers first — it’s the key that lets you match everything else.

Tracker shape: build a simple tracker: entry number → port → liquidation date → deadline (liquidation + 180 days) → owner → status. Even a basic spreadsheet helps prevent missed deadlines at scale.

Step 2 — Add liquidation status and liquidation date for each entry

Common sources:

• ACE exports / ACE portal views (if you have access)
• Your customs broker’s reports, statements, or entry recaps
• Carrier brokerage portals (common for express shipments; varies by account)

If you can’t get liquidation dates quickly, you can still triage by identifying your oldest affected entries first — but don’t assume a liquidation date from shipment/delivery date.

Step 3 — Compute the protest deadline (and write it down)

For each liquidated entry:

• deadline = liquidation date + 180 days

The key is to make this deterministic and reviewable — whether that’s a spreadsheet, a ticketing system, or your own database.

Here’s a simple table shape that works well for teams:

Spreadsheet tip: keep a dedicated deadline column that is always a computed field (liquidation date + 180) so you can sort by urgency without re-doing math.

Step 4 — Bucket your workload for real-world filing

In practice, you’ll usually want to group entries by:

• Port of entry (because filing workflows can be port-specific)
• Broker/filer (because document retrieval and report formats vary)
• Liquidation month (to prioritize near-term deadlines)

5) Common mistakes (that cause missed deadlines)

1. Assuming one global date applies to everyone
   The protest statute is generally liquidation-driven (per entry). See 19 U.S.C. §1514.

2. Using shipment/delivery date instead of liquidation date
   Shipment dates do not reliably map to liquidation.

3. Not tracking liquidation as a field
   If you don’t explicitly record liquidation date/status per entry, you will lose track.

4. Waiting until you “have all documents”
   In many workflows, it’s better to identify your highest-risk entries (earliest liquidation) and act in batches.

5. Ignoring extensions/suspensions
   Some entries have extended/suspended liquidation. Confirm via ACE/broker data rather than assuming a timeline. See 19 U.S.C. §1504.

6) Filing reality: how protests get filed (ACE vs paper)

This is not a filing guide, but deadlines only matter if your organization can execute the filing workflow.

CBP states that protests may be filed:

• Electronically in the ACE Protest module, or
• By paper submission at the port where the entry was made.

See CBP — Protests.

CBP also explains that to file electronically in ACE, trade users need to establish and maintain a protest filer account within the ACE Portal. See CBP — Protest (ACE guidance).

Operational takeaway: treat “protest filer account readiness” as part of your deadline program — not a last-minute scramble.

7) Edge cases and caveats (what to say without overreaching)

A) “180 days after liquidation” is the core clock — but not the only clock

The statute includes a timing rule for “circumstances where [liquidation] is inapplicable,” in which case a 180‑day clock can run from the date of the decision being protested. See 19 U.S.C. §1514.

If your situation doesn’t revolve around liquidation, don’t assume the liquidation-based rule is the only deadline that matters.

B) Reliquidation can restart the clock (in some contexts)

The timing rule references “liquidation or reliquidation.” See 19 U.S.C. §1514. If an entry is reliquidated, treat that as a potential new deadline event for issues tied to the reliquidation.

C) Extensions, suspensions, and deemed liquidation

Liquidation timing rules include mechanisms for extensions and suspensions, and also “deemed liquidation” concepts when liquidation does not occur within statutory limits (subject to exceptions). See 19 U.S.C. §1504.

Conservative practice: don’t infer liquidation status from time elapsed. Always confirm via ACE/broker data.

8) Practical checklist (weekly cadence for high-volume importers)

If you manage dozens/hundreds of entries:

1. Refresh the entry list (new entries + newly liquidated entries)
2. Update liquidation dates/status fields
3. Recompute deadlines (formula-driven)
4. Sort by soonest deadline and assign owners
5. Confirm filing readiness (ACE protest account, required attachments, port grouping)
6. Keep an “exceptions list” for entries with unusual status (extended/suspended/unknown)

9) Have documents vs don’t have documents

If you have 7501s / ACE exports

Upload them and make sure your dataset has (or can reliably derive):

• entry number
• port
• liquidation date/status (or enough data to obtain it)

If you don’t have documents

Your first job is to obtain the entry numbers and 7501s from the broker/carrier that cleared the shipment. Using the official names helps: CBP maintains a Form 7501 overview page and publishes the official Form 7501 PDF.