Missed FTA Preferences: Your 1-Year Recovery Window Under 19 USC 1520(d)

Every US free trade agreement carries a post-importation claim mechanism under 19 USC 1520(d), with a strict 1-year filing window from date of importation. Missed FTA preferences are the single largest recoverable-dollars pattern the LandedFees team sees across audit runs: entries filed at Column 1 general rates on goods that qualified for USMCA, KORUS, or another FTA but had no preferential claim on the 7501.

The leakage engine surfaces these entries automatically. The tasks queue drafts the 1520(d) filing package for review. This guide walks through the mechanism, the qualifying criteria per agreement, and the CBP filing structure.

Why entries get filed at Column 1 when they should not

Three failure modes account for almost every missed preference:

One: certificate of origin arrived late. The producer or exporter did not have the USMCA certification or KORUS Certificate of Origin ready by the time the broker filed the entry summary. Broker defaults to Column 1 general rates. Certificate arrives two weeks later. Nobody re-opens the entry.

Two: broker did not know the FTA applied. Producer sent a commercial invoice with an origin declaration but no explicit FTA claim. Broker treated it as a general-rate entry. This is the pattern that catches USMCA-qualifying Mexican and Canadian entries most frequently.

Three: importer assumed the preference did not apply. New sourcing lane, unfamiliar product category, broker was not instructed to check FTA eligibility. Entry files at Column 1. Six months later somebody notices the same product from the same origin at a peer importer is entering under USMCA and the recovery cycle starts.

The 1520(d) mechanism

19 USC 1520(d) authorizes the importer of record to file a written refund claim within 1 year of the date of importation for goods that qualified for FTA preferential treatment at time of importation but were not claimed at entry.

The statute is short. The implementing regulations (19 CFR Part 181 for USMCA, 19 CFR Part 10 for the other agreements) carry the operational detail.

CBP has 90 days from receipt to act on the claim (19 CFR 181.31(a) for USMCA). Approval triggers a refund of the duty differential plus interest under 19 USC 1505. Denial can be protested under 19 USC 1514 within 180 days.

Filing structure for a USMCA 1520(d) claim

The filing package for a USMCA 1520(d) claim contains:

• A cover letter from the importer of record on company letterhead, requesting refund under 19 USC 1520(d) and citing the entry number(s) and line number(s).
• The USMCA certification of origin covering the goods at time of importation. USMCA does not require a specific form (unlike NAFTA which required CBP Form 434), but the certification must include the 9 required data elements listed at 19 CFR 182.12 Annex.
• A written declaration signed by the importer that the goods qualified for USMCA preferential treatment at time of importation.
• The commercial invoice, packing list, and CBP Form 7501 for each entry covered.
• Calculation of the refund amount per entry line, showing the general rate paid, the USMCA preferential rate, and the delta.
• If the goods are automotive, the automotive-specific requirements at 19 CFR 182 Subpart J including labor value content and steel/aluminum purchasing certification.

File the package with the Center of Excellence and Expertise (CEE) that covers the importer's industry, not with the port of entry.

Filing structure for a KORUS 1520(d) claim

KORUS post-importation claims follow the same structural pattern under 19 CFR 10.1004:

• Cover letter citing 19 USC 1520(d) and KORUS Article 3.4.
• KORUS Certificate of Origin (CBP does not require a specific form; the Korean producer's certification with the 8 required data elements is acceptable).
• Written declaration from importer.
• Underlying entry documents.
• Refund calculation per line.

Filed with the CEE.

Detection: patterns the LandedFees leakage engine flags

The leakage engine surfaces missed FTA preferences by cross-referencing entry data against the HTSUS Special column and the producer's country of origin:

• Entry country of origin matches an FTA partner (MX, CA, KR, CL, CO, PE, PA, AU, SG, MA, BH, OM, or a DR-CAFTA partner).
• HTSUS Special column carries a preferential rate under the applicable FTA program indicator (S for USMCA, KR for KORUS, CL for Chile, etc).
• Entry was filed under Column 1 general rates rather than the preferential rate.
• Delta between general and preferential rate is above a materiality threshold (defaulted to 500 USD but importer-configurable).

Each flag routes to findings with severity high (recoverable dollars) and a recommended action to open a 1520(d) task.

The 1-year deadline mechanics

Date of importation is defined at 19 CFR 101.1 as "the date on which the merchandise arrives within the limits of the port of entry." This is not the date of the 7501 filing, not the date of liquidation, and not the date of release.

For ocean cargo, date of importation is typically the vessel's arrival at the destination port as recorded on the manifest. For air cargo, it is the aircraft's landing time. For truck cargo, it is the border crossing timestamp.

Calendar the 1-year deadline per entry. The reconciliation queue tracks liquidation status and 1520(d) deadlines per entry and surfaces upcoming deadlines in the tasks queue 30 days out.

Qualifying criteria: rules of origin quick reference

Each FTA has its own rules of origin. Summary of the primary categories:

• USMCA: preference criterion A (wholly obtained), B (produced entirely from originating materials), C (satisfies product-specific rule), D (accessories, spare parts, tools). Auto-specific rules add labor value content and steel/aluminum purchasing certification.
• KORUS: originating if wholly obtained in Korea or US, or if it satisfies the product-specific rule of origin in Annex 4-A. De minimis for non-originating materials is 10 percent.
• US-Chile: preference criterion A, B, C, D similar to USMCA. Regional value content options include build-up and build-down formulas.
• DR-CAFTA: seven-country agreement with textile-specific rules requiring yarn-forward origin for apparel.
• US-Colombia, Peru, Panama: substantially similar rules of origin structures.
• US-Singapore, Australia: product-specific rules of origin per Annex.
• US-Morocco, Bahrain, Oman: substantial transformation as the base rule, with product-specific rules for sensitive sectors.

See USMCA origin rules: what qualifies and what doesn't for the detailed criterion tests.

Refund math

For a hypothetical USMCA-qualifying Mexican entry that was filed at Column 1 general rates:

• Entered value: 200,000 USD.
• General rate paid: 4.9 percent = 9,800 USD.
• USMCA rate: 0 percent = 0 USD.
• Refund principal: 9,800 USD.
• Interest under 19 USC 1505: computed from date of duty payment to date of refund at the underpayment rate.

For a portfolio of 50 similar entries over 12 months, the recoverable principal alone is 490,000 USD. Interest on the older entries adds meaningfully.

The leakage engine computes recoverable principal per finding and rolls it up per importer per period for prioritization.

Sequencing: PSC before 1520(d)

If the entry is not yet liquidated and is within 314 days of entry, PSC under 19 CFR 141.114 is faster and cheaper than 1520(d). PSC amends the entry summary directly and the refund flows automatically on liquidation.

1520(d) is the fallback for entries past the PSC window or already liquidated. Do not file both on the same issue; CBP will reject the duplicative one.

See PSC vs 1520(d) vs 19 CFR 174 protest decision tree for the mechanism comparison.

What the LandedFees engine ships end-to-end

The workflow:

1. Leakage engine flags missed FTA entries with recoverable dollars.
2. Findings queue surfaces each flag with severity and recommended action.
3. Tasks queue drafts the 1520(d) filing package: cover letter, certification of origin template, importer declaration, refund calculation.
4. Filed package produces an audit-trail artifact with the CEE receipt.
5. On CBP approval, the refund is logged against the original entry in the reconciliation record.

Run leakage detection on your entry portfolio at landedfees.com/leakage. The first 12 months of entries are free to scan.

Related guides

• PSC vs 1520(d) vs 19 CFR 174 protest decision tree
• USMCA origin rules: what qualifies and what doesn't
• Duty leakage: 6 patterns costing importers 3 to 8 percent of imports
• Wrong AD/CVD scope on your entries: detection and 1520(d) recovery
• Broker audit: how to review a CBP 7501 in 60 minutes

Citations

• 19 USC 1520(d): https://www.law.cornell.edu/uscode/text/19/1520
• 19 CFR 181.31 USMCA post-importation claims: https://www.ecfr.gov/current/title-19/chapter-I/part-181/subpart-D/section-181.31
• 19 CFR 182.12 USMCA certification requirements: https://www.ecfr.gov/current/title-19/chapter-I/part-182
• 19 CFR 10.1004 KORUS post-importation claims: https://www.ecfr.gov/current/title-19/chapter-I/part-10
• CBP USMCA Center: https://www.cbp.gov/trade/priority-issues/trade-agreements/free-trade-agreements/USMCA
• USITC HTSUS Special column key: https://hts.usitc.gov