Trade Policy
US Polysilicon Tariff Adjustment. What It Means for Indian Exporters
Section 232 presidential action, HS codes affected, duty rates, PLI opportunity, UFLPA traceability, semiconductor impact.
By Aaryan Kakani · · 12 min read
What Happened
In August 2026, the White House issued a presidential proclamation adjusting import tariffs on polysilicon (polycrystalline silicon) and its derivative products entering the United States. The action covers polysilicon used in semiconductor manufacturing and solar photovoltaic applications, along with downstream products including silicon wafers, solar cells, and complete solar modules.
The proclamation invokes presidential authority under Section 232 of the Trade Expansion Act of 1962, classifying polysilicon supply chain security as a national security concern. This is consistent with the broader US strategy of using trade tools to reshape critical mineral and advanced material supply chains away from Chinese dominance.
The adjusted tariffs apply to all entries of covered goods into US customs territory on or after the effective date specified in the proclamation. Goods already in transit or in bonded warehouses as of that date are subject to the new rates upon formal entry.
Background and Context
This tariff adjustment sits at the intersection of several major US policy threads that have been building since 2022.
CHIPS and Science Act (2022)
The CHIPS Act committed $52.7 billion in subsidies to rebuild domestic semiconductor manufacturing. Polysilicon is the foundational raw material for semiconductor-grade silicon wafers. Protecting domestic polysilicon production aligns with the Act's goal of end-to-end supply chain security for chips.
Inflation Reduction Act (2022)
The IRA provides production tax credits and investment tax credits for domestically manufactured solar equipment. To qualify for the full credit, manufacturers must meet domestic content requirements that progressively increase. The tariff adjustment reinforces these incentives by making imported alternatives more expensive.
China's Polysilicon Dominance
China produces approximately 80% of the world's polysilicon, with Xinjiang alone accounting for roughly 35%. Chinese producers have driven global prices down through massive scale, government subsidies, and access to cheap coal-fired electricity. The US views this concentration as a strategic vulnerability for both its semiconductor and clean energy ambitions.
Existing Trade Actions
The US already has multiple layers of trade measures on solar products: Section 201 safeguard tariffs on solar cells and modules (since 2018, extended and modified), Section 301 tariffs on Chinese goods (25% on many solar inputs), and antidumping/countervailing duty (AD/CVD) orders on solar cells from several countries. This new action adds another layer specifically targeting the upstream polysilicon supply chain.
Products and HS Codes Affected
The proclamation covers the entire polysilicon value chain, from raw material to finished solar modules. Below is the HS code breakdown with product descriptions.
| HS Code (US HTS) | Product Description | Application |
|---|---|---|
| 2804.61.00 | Polycrystalline silicon, containing >= 99.99% Si | Semiconductor & solar feedstock |
| 2804.69.10 | Silicon, other, containing >= 99.99% Si | Electronic-grade silicon |
| 3818.00.00 | Silicon doped for electronics (wafers, ingots) | Semiconductor wafers |
| 8541.40.60 | Photovoltaic cells, not assembled into modules | Solar cells (unassembled) |
| 8541.40.20 | Photovoltaic cells, assembled into modules | Solar panels / modules |
| 8501.71.00 | Solar DC generators, output <= 50W | Small solar modules |
| 8501.72.00 | Solar DC generators, output > 50W | Utility-scale solar modules |
| 7002.20.10 | Glass rods of fused quartz for solar use | Solar panel cover glass |
| 3920.99.50 | Plastic sheets (EVA encapsulant) | Solar module encapsulation |
HS codes shown are US Harmonized Tariff Schedule (HTS) classifications. Indian exporters should cross-reference with ITC-HS codes used in Indian shipping bills. Note that HTS subheading splits at the 8-digit level may differ from ITC-HS classifications.
New Tariff Rates
The proclamation establishes a tiered tariff structure. Rates vary by product category and, in some cases, by country of origin. The table below compares previous and new rates for key product categories.
| Product | Previous Rate | New Rate (General) | New Rate (China-origin) | Notes |
|---|---|---|---|---|
| Polysilicon (2804.61) | Free. 3.7% | 10% | 50% | Covers all purity grades |
| Silicon wafers (3818.00) | Free. 3.9% | 12% | 50% | Semiconductor & solar wafers |
| Solar cells, unassembled (8541.40) | 14.75%* | 20% | 50% | *Incl. Sec 201 safeguard |
| Solar modules (8501.71/72) | 14.75%* | 25% | 50% | *Incl. Sec 201 safeguard |
| Solar cover glass (7002.20) | 5% | 8% | 33% | Fused quartz glass |
| EVA encapsulant (3920.99) | 4.2% | 6.5% | 29.2% | Incl. Sec 301 where applicable |
Rates shown are ad valorem duties. Actual landed cost may include additional duties under existing Section 201, Section 301, and AD/CVD orders depending on country of origin and specific product classification. Always verify against the official Federal Register notice.
Exclusion Process
The proclamation establishes a product-specific exclusion process administered by the Bureau of Industry and Security (BIS). US importers can apply for temporary exclusions if they can demonstrate that the specific polysilicon grade or derivative product is not available from domestic or allied-country sources in sufficient quantity and quality. Exclusion requests are reviewed on a case-by-case basis with a 90-day processing timeline. The exclusion, if granted, is valid for one year and subject to renewal.
Impact on India's Solar Manufacturing Sector
India's solar manufacturing ecosystem is at an inflection point. The US tariff adjustment creates both headwinds and tailwinds that Indian manufacturers need to navigate carefully.
PLI Scheme for Solar Manufacturing
India's Production Linked Incentive (PLI) scheme has allocated INR 24,000 crore for high-efficiency solar module manufacturing. Companies like Adani Solar, Tata Power Solar, Vikram Solar, and Waaree Energies are building integrated cell and module capacity. However, these facilities still rely on imported polysilicon and wafers as raw material. The US tariff action does not directly affect this import dependence, but it reshapes the export opportunity for finished products.
India's Polysilicon Import Dependence
India imports virtually all of its polysilicon requirements. In FY 2025. 26, India imported approximately 120,000 MT of polysilicon, with China accounting for over 75% of supply. Germany (Wacker Chemie), South Korea (OCI), and the US (Hemlock, REC Silicon) supply the remainder. If US polysilicon producers divert output to domestic consumers incentivised by CHIPS Act subsidies, global supply tightens and Indian manufacturers face higher input costs regardless of where they source.
India's Own Import Duties on Solar Equipment
Since April 2022, India levies a 40% Basic Customs Duty (BCD) on imported solar modules and 25% BCD on imported solar cells. This protects domestic cell and module manufacturers but creates a cost challenge: Indian manufacturers pay elevated prices for imported polysilicon and wafers, then face tariff barriers when trying to export finished products to the US. The dual tariff squeeze pressures margins from both the input and output sides.
The Opportunity: India as an Alternative to China
With China-origin solar products facing effective US duties of 50. 70%+, the US market is actively seeking alternative suppliers. India is well-positioned: it has growing manufacturing scale, English-speaking workforce, improving quality standards (BIS certification for solar modules), and no UFLPA risk if polysilicon is sourced from non-Xinjiang origins. Indian manufacturers who can secure non-Chinese polysilicon supply and demonstrate full traceability have a genuine window to capture US market share.
Impact on Indian Solar Equipment Exporters to the US
For Indian companies already exporting or planning to export solar panels, cells, and components to the US market, the tariff adjustment creates a mixed picture.
Higher Duties on Indian-Origin Products
Indian solar modules now face a 25% duty (up from 14.75% under the Section 201 safeguard alone). Solar cells face 20%. This increases the landed cost of Indian solar products in the US and squeezes margins for Indian exporters who were pricing competitively under the old rate structure. Exporters with existing US contracts at fixed prices will absorb the entire cost increase until contracts can be renegotiated.
Relative Advantage vs. China
Despite the absolute increase, Indian exporters gain a significant relative advantage. Chinese solar modules face 50% or more (before AD/CVD stacking), while Indian modules face 25%. For a $0.20/W solar module, this translates to $0.05/W duty from India vs. $0.10/W+ from China. A $0.05/W cost advantage that can be decisive in utility-scale procurement. US project developers and EPCs are already diversifying supply chains, and India is a primary beneficiary.
AD/CVD Risk for Indian Solar
As Indian solar exports to the US grow, there is a risk that US domestic manufacturers file AD/CVD petitions against Indian-origin products, as they have done against Chinese, Vietnamese, Thai, Malaysian, and Cambodian imports. Indian exporters should monitor the US International Trade Commission (USITC) docket for any circumvention inquiries or new petitions targeting India. Maintaining accurate cost records and pricing documentation is essential for defending against future AD/CVD allegations.
Impact on Indian Semiconductor Industry
India's nascent semiconductor industry is also affected, though the impact is more indirect and longer-term.
India Semiconductor Mission
The India Semiconductor Mission (ISM), with a