Figure 1

Solar Tariff Whac-a-Mole

Effective tariff rate, quarterly

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Source: Harmonized Tariff Schedule.

Notes: Effective tariff rates are calculated as duties collected divided by customs value, using the following HTS codes for each period: Polysilicon: 2804.61.00 (unchanged); Solar Inputs: 2010–2011: 8541.40.60; 2012–2021: 8541.40.6020, 8541.40.6030; 2022–present: 8541.42.00.10, 8541.43.00.10, 8541.40.6015, 8541.40.6025. Polysilicon includes both solar-grade and semiconductor-grade.