U.S. exports of Polycarbonates, Primary Forms (HS 390740) totaled $64.5M in August 2026.
Importers of Polycarbonates, Primary Forms paid $3.8M in duties in August 2026, an average duty rate of 10.26% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Polycarbonates, Primary Forms imports of $37.7M in August 2026 ran 20% above the year-to-date monthly average of $31.4M.
Last updated: August 2026 dataPolycarbonates are high-performance engineering thermoplastics valued for optical clarity, impact resistance, and heat tolerance, making them essential in automotive glazing, optical media, electronic housings, and medical devices. South Korea is the dominant US import source, with Canada and Mexico also supplying meaningful volumes—the latter two benefiting from USMCA proximity. Classified under a single 10-digit line (3907400000), polycarbonate resin grades vary by melt flow index and molecular weight, and specification mismatches can cause processing problems downstream. Importers should also be aware that polycarbonate from certain Asian origins may carry Section 301 exposure depending on the supply chain.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
917 import shipments a month
MFI is a critical commercial specification—low-MFI grades suit structural and glazing applications while high-MFI grades are used for thin-wall injection molding. MFI is not a classification criterion under HTS 3907.40, so it need not be declared on the entry, but it should be specified in purchase contracts and technical documentation to ensure the correct grade is delivered and to support any quality disputes.
Polycarbonate originating in Canada or Mexico may qualify for USMCA preferential tariff treatment if it meets the applicable rules of origin, including any required tariff shift or regional value content threshold. Importers must obtain a valid certification of origin from the producer or exporter and retain it for five years to support the preference claim.
Subheading 4 of 11 in heading 3907
Subheading 390740 · $64.5M of $440.8M
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3907400000 | Polycarbonates | $37.5M | 10.26% | 77.51% | $3.8M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3907400000 | Polycarbonates | $64.5M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Exports · August 2026
destination
Mexico and Canada together take 81% of it.
customs district
origin
entry
rate provision · imports
22.4% enters free of duty; duty collected equals 10.26% of imports for consumption.
ImportsExports
Imports
$37.7MYoY · free account
Exports
$64.5MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $345.3M of Polycarbonates, Primary Forms and exported $772.0M.
Through August 2026. Source: U.S. Census Bureau.