Never pay MFN on a USMCA-eligible line
Automated verification against 14,376 USMCA-specific trade rules for Mexico and Canada — the lines other calculators read as MFN.
Our engine identifies the modern S indicator in the HTS — and the legacy MX / CA codes still in use — so you never overlook a 0% preferential rate.
What this calculator reflects. Preferential rates are extracted from USITC HTS 2026 r6 as published by USITC. We refresh weekly. The 0% USMCA rate applies onlywhen the goods qualify under USMCA’s rules of origin and the importer files a valid Certification of Origin at entry — see the CBP USMCA page for binding origin guidance. We surface eligibility, not certification.
14,376
USMCA rules audited
7,189
Canada-origin lines
7,187
Mexico-origin lines
MPF waived
On qualifying entries
Why this matters
The modern S indicator — what other tools miss
The retired symbols
When NAFTA became USMCA in 2020, CBP officially retired the MX and CA legacy codes in favour of S (and S+ for textiles). Most off-the-shelf calculators still scan only for MX / CA — silently missing thousands of duty-free lines.
What we cover
Every Special Program Indicator USMCA goods carry today — S, S+, plus the legacy MX / CA — resolved to the right partner (Mexico / Canada) and the published preferential rate. 14,376 rules indexed today.
What you save
A 2.5% MFN auto rate on a $1M shipment from Mexico = $25,000 in duty. If your spreadsheet missed the USMCA preference because it didn't read the S code, you just overpaid for nothing.
Pro feature spotlight
MPF waived — the hidden USMCA perk
When the Origin row matches USMCA (or any of 12 other US FTAs) and the rate is preferential, our calculator automatically flips the Merchandise Processing Fee to $0. On a $50,000 formal entry, that’s a $173 saving — before you even count the duty waiver.
- Auto-applied when origin = MEX / CAN and a USMCA preferential row exists for that HTS code
- Surfaced as a clear "MPF exempt under USMCA" line in the breakdown — auditable, not hidden
- Reminder note: "goods must qualify under the FTA’s rules of origin (Certification of Origin required)" — so you don’t claim a benefit you can’t prove
Verified examples
Common USMCA audits — Mexico + Canada origin
| HTS code | Description | Origin | Audit |
|---|---|---|---|
| 8703236000 | Passenger cars (1.5 – 3.0 L) 0% under USMCA · saves 2.5% MFN | MEX | Verify |
| 8528720060 | LCD/LED televisions ≥ 35 in 0% under USMCA · saves 5% MFN | MEX | Verify |
| 8517130000 | Smartphones Already 0% MFN — origin-of-record matters | MEX | Verify |
| 9401710001 | Upholstered metal seats 0% under USMCA | CAN | Verify |
| 0203210000 | Frozen pork carcasses 0% under USMCA + MPF waived | CAN | Verify |
| 4407110000 | Coniferous lumber 0% under USMCA | CAN | Verify |
Full transparency
The logistics specialist’s checklist — automated
MPF (Merchandise Processing Fee)
0.3464% of CIF with $32.71 MIN / $634.62 MAX (FY2026). Informal-entry flat $2.62 below $2,500. Auto-waived under USMCA + 12 other FTAs.
HMF — sea cargo only
0.125% Harbor Maintenance Fee added when transport mode is sea. Air, road, and courier shipments aren't subject — and we don't show the line if it doesn't apply.
PGA / regulatory alerts
Amber-flagged warnings when an HS chapter typically triggers FDA, FCC, EPA, USDA, DOT, CPSC, ATF, or TTB filings. Heuristic — verify with CBP — but you'll never get blindsided at entry.
USMCA — frequently asked
Common questions
What is USMCA?
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The United States-Mexico-Canada Agreement, in force since July 1 2020, replaced NAFTA. It provides 0% preferential duty on most goods that qualify under USMCA's rules of origin (regional value content, tariff-shift, or specific product rules), with stricter content requirements for autos and stronger labour and IP provisions than NAFTA.
Why does USMCA use the HTS 'S' code instead of MX or CA?
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When NAFTA became USMCA in 2020, US Customs and Border Protection retired the legacy MX and CA Special Program Indicators in favour of S (with S+ for some textiles and agricultural products). Many off-the-shelf duty calculators still scan only for MX and CA, silently missing thousands of duty-free USMCA lines. Our calculator reads all four indicators (S, S+, MX, CA) and applies the published preferential rate for both Mexico and Canada origin.
Does USMCA waive the Merchandise Processing Fee?
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Yes — provided the goods qualify under USMCA's rules of origin and the importer claims the preference at entry with a valid Certification of Origin. Our calculator automatically flips MPF to $0 when origin is MEX or CAN and the HTS line has a USMCA preferential row. On a $50,000 formal entry, that's a $173 saving on top of the duty waiver.
How do I qualify a good as USMCA-originating?
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Three main paths: (1) the good is wholly obtained or produced in a USMCA country; (2) it's produced exclusively from originating materials; or (3) it satisfies a product-specific rule of origin (PSRO) — typically a tariff-shift or regional-value-content threshold. The PSRO is published per HTS line in the USMCA agreement text. Once qualified, the importer issues or relies on a USMCA Certification of Origin (no specific form mandated; nine required data elements).
What's the difference between the legacy NAFTA Certificate and the new USMCA Certification?
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USMCA replaced NAFTA's mandatory CBP Form 434 with a free-form Certification of Origin that any qualified party (exporter, producer, or importer) may issue, provided it carries the nine required data elements. It can be on the commercial invoice, a separate document, or even a continuous certification covering multiple shipments for up to 12 months.
What happens if I claim USMCA preference and my goods don't qualify?
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CBP can demand back-duties, MPF, and penalties via post-entry review. Our calculator surfaces the rules-of-origin reminder on every USMCA breakdown so you don't claim a preference you can't substantiate. We do not certify origin — that's a determination only the producer, exporter, or importer can make.
How current is your USMCA data?
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Our USMCA preferential map is rebuilt every week against the latest published USITC tariff schedule. Every Special Program Indicator a USMCA-eligible line carries today (S, S+, MX, CA) is resolved to its partner (Mexico or Canada) and the published preferential rate — 14,376 rules across both partners. The current schedule version + last refresh time are shown next to the calculator.
Verify USMCA origin in 30 seconds
Pick any HTS code, set origin to Mexico or Canada — the calculator swaps MFN for the USMCA preferential rate, waives MPF, and surfaces the rules-of-origin reminder you need for the Certification.