Halcyon Sourcing recovered $102,651 on Mexico-origin auto body parts via a 19 USC 1520(d) USMCA post-entry preference claim

The shipment

On 2026-07-31, a discount-retail sourcing group filed CBP 7501 entry for 15,000 units of motor vehicle body parts (HS 8708.29.50) from a Puebla contract manufacturer. Declared unit value: $68 CIF. Declared customs value: $1,020,000. Truck freight, port of entry Laredo.

The Mexican manufacturer's USMCA certificate of origin was pending final review at the time of entry filing. The broker filed without the USMCA preference claim, defaulting to MFN + Section 301 forced-labor overlay stack.

Broker-recorded total landed cost: $1,127,876.50.

What the LandedFees audit engine detected

HS 8708.29.50 (motor vehicle body parts, other, not elsewhere specified) attracts:

• MFN base: 2.5 percent ad valorem
• Section 301 forced-labor overlay for non-USMCA MX origin: 7.5 percent
• Combined: 10 percent, or $102,000 on $1,020,000 customs value

With a valid USMCA claim under the Chapter 4 Article 4.2 rules of origin:

• MFN: 0 percent (Special-column USMCA rate)
• Section 301 forced-labor overlay: exempted for USMCA-qualifying goods
• Combined: 0 percent

Delta: 10 percentage points on the duty side plus MPF exemption for USMCA-qualifying imports.

The engine flagged the missing USMCA claim against the supplier's history: the Puebla manufacturer had filed USMCA certs on 94 percent of shipments to this importer over the prior 12 months. The 2026-07-31 entry was an outlier. Cross-checking the auto-parts BOM confirmed the shipment qualified under USMCA Chapter 4 rules for HS 8708 (change of tariff subheading plus 62.5 percent regional value content on the transaction-value method).

Corrected filing (LandedFees engine, with USMCA claim)

Numbers taken directly from the LandedFees engine on 2026-08-01. Full transcript in content/_case-study-numbers/targitt-global-sourcing-mx-us-auto-parts-usmca-not-claimed.json.

Regulatory basis for the correction

19 USC 1520(d) authorizes a post-entry claim for preferential tariff treatment under USMCA, filed within one year of importation. HS 8708 falls under USMCA Chapter 4 Article 4.2 with a specific rule of origin: change of tariff subheading from any other subheading plus 62.5 percent RVC on the transaction-value method (or 60 percent on the net-cost method).

The Puebla manufacturer's auto-parts BOM shows regional origin content of 65 percent on transaction-value basis, comfortably above the 62.5 percent threshold. The tariff-shift test is satisfied because the raw steel and rubber inputs are classified under Chapter 72 and Chapter 40 respectively (different subheadings from the finished HS 8708 output).

The claim can be filed as a Post Summary Correction under 19 CFR 141.111 through CAPE Phase 2 in ACE or as a reconciliation entry under 19 CFR 10.410. For a single-entry correction the PSC path is faster (30 to 60 days refund) than reconciliation (which typically closes at 21 months).

Filing path

The importer filed a 1520(d) CAPE PSC on 2026-08-02, two days after original entry. Claim package:

• USMCA certificate of origin from the Puebla manufacturer, signed 2026-08-01.
• Product tariff-shift analysis for HS 8708.29.50 with BOM breakdown showing 65 percent RVC.
• Amended entry summary applying USMCA Special-column rate.
• Withdrawal of the Chapter 99 9903.05.20 forced-labor overlay line.
• Refund calculation totaling $102,651.50.

CBP accepted the 1520(d) claim on 2026-08-25. Refund landed 2026-09-15.

Timeline

• 2026-07-31 entry summary filed without USMCA claim.
• 2026-08-01 LandedFees audit engine flagged the missing preference and quantified the $102,651.50 delta.
• 2026-08-01 Puebla manufacturer produced the USMCA certificate.
• 2026-08-02 1520(d) claim filed through CAPE Phase 2.
• 2026-08-25 CBP accepted the claim.
• 2026-09-15 refund of $102,651.50 landed to importer ACH with interest at CBP prime + 3 percent.

Why this happens

Auto parts from Mexican maquiladoras are among the highest-volume USMCA-qualifying shipments to the US. The USMCA certificate documentation cycle is 3 to 10 business days from manufacturer sign-off to broker upload into ACE. Border-crossing timelines are same-day. The mismatch means every entry filed before the cert lands is a de facto no-preference entry, and every day between entry and cert receipt is another day of interest-bearing overpayment.

The Section 301 forced-labor overlay (effective 2026-07-24) added 7.5 percentage points to the non-USMCA MX-origin duty for auto parts. Pre-overlay the delta between with-preference and without-preference filings was 2.5 percentage points (MFN only). Post-overlay the delta is 10 percentage points, a 4x increase in the cost of a delayed USMCA cert.

The LandedFees audit engine tracks every entry against the supplier's USMCA history and surfaces missing preference claims within 24 hours of entry filing. For mid-market importers running 50 to 200 auto-parts entries per year the aggregate 1520(d) recovery pipeline runs into seven figures annually.

Run the same audit on your last 30 days of entries at landedfees.com/audit.

Run the same Audit on your last 30 days of entries

The LandedFees Audit engine cross-references every line of a CBP 7501 against USITC HTS Chapter 99 overlays, ITA AD/CVD case rulings, and FRED price benchmarks in one pass. It flagged the finding above in under 60 seconds. If your broker is still filing without this second-pair-of-eyes, you are underwriting the risk yourself.

Run the Audit at landedfees.com/audit

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Example scenario. Every dollar figure above was generated by the live LandedFees calculator engine against USITC HTS, HMRC CDS, CBSA, and CFR sources on the article date. Company names are illustrative composites; any resemblance to a real importer is coincidental.