Tariffs on Spectrometers

Spectrometers imported into the U.S. are classified under HTS codes 9027.30 for optical spectrometers and 9027.81 for mass spectrometers, with duty rates determined by the Harmonized Tariff Schedule.HTS ClassificationMass Spectrometers (HS 90278100): Includes instruments such as liquid chromatography-mass spectrometers (LC-MS), gas chromatography-mass spectrometers (GC-MS), and inductively coupled plasma mass spectrometers. These are primarily used for chemical analysis and are classified under HS 90278100 for import/export declarations .Optical Spectrometers (HTS 9027.30 / HS 90273000): Covers spectrometers, spectrophotometers, and spectrographs using optical radiations (ultraviolet, visible, infrared). Examples include UV-Vis spectrophotometers and IR spectrometers. This category also includes parts and accessories .Duty Rates and Trade ProgramsThe Harmonized Tariff Schedule of the United States (HTS) sets the duty rates for these instruments. Tariff rates can vary depending on the country of origin, trade agreements, and applicable exemptions. As of February 20, 2026, Executive Order 14389 ended certain additional ad valorem duties imposed under the International Emergency Economic Powers Act (IEEPA), but the HTS still lists these duties until further guidance from the USITC .Key ConsiderationsClassification Accuracy: Properly classifying the spectrometer under the correct HTS code is essential for determining the correct duty rate. Misclassification can result in penalties or delays.Parts and Accessories: Both mass and optical spectrometers include subcategories for parts and accessories, which may have different duty rates.Updates and Rulings: The USITC provides official notes and CBP classification rulings that may affect tariff classification under HTS 9027.30 and 9027.81. Importers should consult these resources for the most accurate and current information. For detailed duty rates and classification guidance, you can use the interactive HTS explorer on the USITC website or consult the specific HTS pages for 9027.30 and 90278100 .