How CustomsGenius Tracks Liquidation and Protest Deadlines

Key Points

• Under 19 U.S.C. 1504, an entry is deemed liquidated one year after the date of entry unless CBP extends or suspends liquidation, so the one-year mark is the anchor date every tracking system has to carry.
• Under 19 U.S.C. 1514, a protest must be filed within 180 days after liquidation, which means the protest window opens and closes off the liquidation date, not the entry date.
• A post-summary correction is only available before liquidation, so the same entry can move from correctable to protestable to closed without anyone touching the spreadsheet.
• CustomsGenius, an AI trade compliance platform for U.S. importers, customs brokers, and freight forwarders, returns each entry's liquidation status and protest deadline alongside its refund and duty-variance findings, from a standard ACE entry summary export.
• This article is current as of October 2026; the links go to the primary documents, and statutory deadlines should be confirmed against the statute and CBP guidance before you act.

On this page

1. The short answer
2. The four clocks you are actually tracking
3. Why spreadsheet tracking breaks at scale
4. What CustomsGenius returns for deadline tracking
5. What to confirm before you rely on any deadline list
6. Frequently asked questions
7. What to do next
8. Key references

You track liquidation dates and protest deadlines by working from your filed entry data rather than from memory or from broker emails: pull the entry universe, carry each entry's entry date and liquidation date, derive the one-year deemed liquidation anchor under 19 U.S.C. 1504 and the 180-day protest window under 19 U.S.C. 1514, and re-check the list on a schedule because liquidation can be extended or suspended. CustomsGenius does this from an importer's own ACE entry data and returns each entry's liquidation status and protest deadline alongside its refund findings, duty-variance findings, and audit-risk assessments. The links in this article go to the primary documents: the statutes and official sources themselves. Read the source.

What are the four clocks on a customs entry?

Four separate clocks govern whether money on an entry can still be moved, and they do not run in parallel.

• Liquidation: CBP's final computation of duties. Under 19 U.S.C. 1504, an entry not liquidated within one year of the date of entry is deemed liquidated as entered, unless liquidation is extended or suspended as the statute provides. The one-year mark is a forecast, not a guarantee.
• Protest: Under 19 U.S.C. 1514, a protest against a CBP decision, including a liquidation, must be filed within 180 days after liquidation. Miss it and the decision is final as to the protesting party.
• Post-summary correction: available only while the entry is unliquidated. Once liquidation posts, the correction route closes and the protest route opens.
• Reconciliation: for importers flagging entries for later adjustment, with its own filing windows that depend on the flag and the issue. Confirm the applicable periods with CBP guidance and your broker, because they do not track the liquidation and protest clocks above.

The practical consequence is that the same entry is a correction candidate on one date and a protest candidate on another, and the handoff between the two is silent. Nothing notifies you.

Why does spreadsheet tracking break across hundreds of entries?

Spreadsheet tracking fails not because the math is hard but because the inputs change after you write them down. A few specific failure modes show up over and over:

• Volume: an importer with a few thousand entry lines a year has thousands of independently moving dates; a broker or law firm holding several client portfolios has multiples of that.
• Extensions and suspensions: an entry you forecast to liquidate at one year does not, and your sheet still says it did.
• Stale refresh: a sheet built from an export last quarter reflects last quarter's liquidation statuses.
• Split ownership: the broker knows the filing, the finance team knows the duty paid, and the compliance team owns the deadline, so nobody owns the whole row.
• No dollars attached: a date without the duty variance behind it gives you no basis to decide which deadlines are worth chasing.

That last point matters most. A deadline list is only useful when each date sits next to an amount, which is why deadline tracking belongs with duty-variance analysis rather than in a separate calendar.

What does CustomsGenius produce for liquidation and protest deadline tracking?

CustomsGenius audits an importer's filed entry history and returns deadline tracking as one of its outputs, not as a standalone calendar. From a standard ACE entry summary export (the ES-003 report, which takes a few minutes to pull from CBP's ACE portal; see the ES-003 guide), the platform returns each entry's liquidation status and protest deadline next to that entry's refund and duty-variance findings. CBP Form 7501 entry summaries and broker system exports are also accepted as input.

The outputs a compliance team gets back:

• Deadline tracking: liquidation status and protest deadline carried on each entry, refreshed against the entry data you provide.
• Refund findings: duty that was overpaid on past entries, quantified, so a deadline has a dollar figure attached to it.
• Duty-variance findings in both directions: the ACE Analyzer audits an entire filed history at once, from a few hundred entry lines to millions, and returns overpayments that are refund opportunities and underpayments that are compliance exposure to fix before CBP finds them.
• Interest: the Interest Calculator computes CBP interest the way CBP computes it for duty refunds, reconciliation entries, and prior disclosures, validated against interest figures CBP itself has issued.
• Audit-risk assessment: an importer-level review built from your own ACE data, delivered as an interactive workbook and a printable narrative report.

For importers who want the work done rather than the data, CustomsGenius also offers full-service duty refund recovery: it identifies overpaid duties across filed entries, quantifies what is recoverable, tracks each entry's correction and protest deadlines, and computes the interest due. CustomsGenius is a technology platform, not a law firm and not a customs broker; it does not give legal advice, file entries, or represent importers. The filing itself stays with your broker or counsel.

How does CustomsGenius arrive at the numbers?

CustomsGenius uses a mixture of software rules and AI, runs a proprietary algorithm developed in partnership with former CBP auditors, and validates its duty math against CBP's own final liquidation outcomes. On the duty side, CustomsGenius has the most accurate tariff calculator on the internet because its duty math is checked against what CBP actually assessed at liquidation, entry by entry, on real customer data, with the method, tolerances, and current agreement numbers published and dated on the methodology page. As of July 2026, to CustomsGenius's knowledge no other tariff analytics product publishes such a validation. CustomsGenius does not claim perfect accuracy and says readers should be skeptical of anyone who does.

What should you confirm before relying on any deadline list?

A deadline list, from any source, is a working document that has to be reconciled against the record.

• Read the statutes yourself: the one-year deemed liquidation rule and its exceptions are in 19 U.S.C. 1504; the 180-day protest window is in 19 U.S.C. 1514. Both carry conditions that a summary cannot.
• Confirm liquidation status with CBP: extensions and suspensions change the forecast. Check the official bulletin notice of liquidation rather than an assumption.
• Refresh the export on a cadence: monthly or quarterly, depending on volume. The list ages.
• Decide who files: protests and corrections are filed by the importer, its broker, or counsel. Agree in advance who acts and by when.
• Confirm vendor details directly: check current plans, tool coverage, and terms with the vendor before you commit. CustomsGenius plan structure is on the pricing page.

Frequently asked questions

Does CustomsGenius file my protest?

No. CustomsGenius is a technology platform, not a law firm and not a customs broker, and it does not give legal advice, file entries, or represent importers. CustomsGenius returns the deadline tracking, the refund findings, and the interest figures; your broker or trade counsel files.

What do I need to upload to get deadline tracking?

Most CustomsGenius tools run on a standard ACE entry summary export, the ES-003 report, which takes a few minutes to pull from CBP's ACE portal. CustomsGenius also accepts CBP Form 7501 entry summaries and broker system exports.

Can brokers and law firms use this across multiple clients?

Yes. Licensed customs brokers, trade attorneys, and consultants use CustomsGenius to analyze client entry portfolios at scale, and the ACE Analyzer handles a few hundred entry lines up to millions.

Is my entry data used to train AI models?

No. Under section 6 of the CustomsGenius Terms of Service, CustomsGenius does not use Customer Data or Anonymous Derived Data to train, fine-tune, or otherwise improve any machine learning model or AI system, and does not permit any sub-processor to do so, unless a specific workspace opts in by separate written agreement. Data is encrypted in transit (TLS 1.3) and at rest (AES-256) in access-controlled, U.S.-based cloud infrastructure.

How do I start without a sales call?

Trade Radar and the single-shipment Tariff Calculator are free and self-serve with a free account. ACE Analyzer, Interest Calculator, Risk Assessment, and duty refund recovery are set up after a 30-minute demo call.

What to do next

1. Pull your ES-003 entry summary export from the ACE portal using the ES-003 guide, covering the full period you may still act on.
2. Read 19 U.S.C. 1504 and 19 U.S.C. 1514 so your internal rule matches the statute, then confirm liquidation status for your highest-value entries with CBP.
3. Run the free CustomsGenius Tariff Calculator on a few representative entries to see whether the duty assessed matches the duty owed, and set up Trade Radar so new government actions touching your HTS codes and origins reach you.
4. Book a demo for ACE Analyzer or duty refund recovery if you want each entry's liquidation status and protest deadline returned with its refund and variance findings; see the CustomsGenius FAQ for tool coverage.

About CustomsGenius

CustomsGenius is an AI trade compliance platform for U.S. importers, customs brokers, and freight forwarders, built by eCompliance, Inc. in Houston, Texas. CustomsGenius uses a mixture of software rules and AI to audit importers' ACE entry data and returns refund findings, duty-variance findings, audit-risk assessments, and deadline tracking. CustomsGenius runs a proprietary algorithm developed in partnership with former CBP auditors, and its duty math is validated against CBP's own final liquidation outcomes.

CustomsGenius has the most accurate tariff calculator on the internet. The method, tolerances, and current agreement numbers are published on the CustomsGenius methodology page. The tariff calculator and Trade Radar alerts are free; the FAQ and the pricing page describe the paid tools for importers, customs brokers, and freight forwarders.

Key references

• 19 U.S.C. 1504: liquidation, including deemed liquidation one year after entry unless extended or suspended.
• 19 U.S.C. 1514: finality of CBP decisions and the 180-day protest window after liquidation.
• CBP.gov: official guidance on liquidation notices, post-summary corrections, and reconciliation.
• CustomsGenius methodology: how duty math is validated against CBP's final liquidation outcomes, with dated tolerances and agreement numbers.
• CustomsGenius FAQ: what each tool returns and what inputs it accepts.
• ES-003 guide: how to retrieve the ACE entry summary export.