A pair of sunglasses looks like one of the simplest things to classify. It is a frame and two dark lenses, and the heading seems to say so directly: heading 9004 covers spectacles, goggles, and the like, corrective, protective, or other, and subheading 9004.10 is dedicated to sunglasses. In the US the full HTSUS line is 9004.10.00.00, and it applies to all sunglasses entering the country. The frame material, plastic or metal, does not change the code. What changes it is the lens, and specifically whether the lens corrects vision, because the heading splits on function, not on appearance.
The split inside 9004 is the part importers get wrong. Subheading 9004.10 covers sunglasses, which the World Customs Organization defines as spectacles with tinted or darkened lenses designed to protect the eyes from bright sunlight and glare. Subheading 9004.90 covers everything else in the heading: corrective eyeglasses, reading glasses, prescription frames, and most safety glasses. A pair of reading glasses is always 9004.90, because it is a corrective device. A pair of plain sunglasses is 9004.10. The trap is the hybrid: sun readers, reading glasses with tinted UV400 lenses, are corrective devices, so they belong in 9004.90, not 9004.10. Declaring them as sunglasses because they are dark is one of the most common reclassification findings for eyewear importers.
CBP has ruled on sunglasses repeatedly, and the rulings show how the General Rules of Interpretation apply when the product is more than just glasses. In NY M83291, from June 2006, CBP classified four sunglass kits, each containing sunglasses plus a magnetic visor clip, a cleaning cloth, and a carrying case. The kits met the criteria for sets under GRI 3(b), and the sunglasses imparted the essential character to the sets, so the whole kit was classified as sunglasses in heading 9004, subheading 9004.10.0000, at 2 percent ad valorem. The visor clip pack on its own went to 8505.11 as a permanent magnet. In NY B89455, from September 1997, hunting glasses with a cord holder and a drawstring bag were classified the same way, 9004.10.0000, at 4.1 percent. The pattern is consistent: when the glasses give the set its character, the set follows the glasses.
The prescription question has its own answer, and it comes from a Canadian tribunal, not a CBP ruling, but the reasoning tracks the same Harmonized System text. In AP-96-048, the Canadian International Trade Tribunal considered RXable sunglasses, frames imported complete with nonprescription demo lenses, which could be worn as is or fitted with a prescription lens. The importer argued they were frames under 9003. The tribunal held they were sunglasses under 9004.10, noting that the term sunglasses in the subheading and Explanatory Notes has not been qualified in any way to refer only to nonprescription sunglasses, and that the Explanatory Notes contemplate the term including both prescription and nonprescription sunglasses. Classification is determined at the time of entry, and at entry the goods were sunglasses, not frames.
Three checks keep a sunglasses entry out of trouble. First, separate the lines by lens type. In the EU and UK, optically worked glass lenses and plastic lenses take different CN sub-codes, 9004 10 10 and 9004 10 91, so a mixed container of fashion polycarbonate sunglasses and glass-lens aviators needs separate tariff lines. Second, do not let the sport or the shatterproof lens move you out of 9004.10. Sports sunglasses, even with wraparound designs and shatterproof polycarbonate lenses, remain 9004.10, because their primary purpose is sun protection. Subheading 9004.90 is reserved for protective goggles, laboratory safety goggles, welding goggles, and ski goggles, where the primary function is protection beyond sun glare. Third, if the lens corrects vision, declare 9004.90 and say so on the paperwork, with the diopter range stated, because assorted eyewear invites an inspection and a tinted corrective lens declared as a sunglass is a reclassification waiting to happen. If a smart device is the classification problem instead, classify a smartwatch covers the heading fight between 8517 and 9102, and classify a coffee maker covers why essential character decides the code.
9004.10, under heading 9004, spectacles, goggles, and the like, corrective, protective, or other. In the US the full HTSUS line is 9004.10.00.00, and it applies to all sunglasses entering the country.
No. Whether the frame is plastic or metal does not change the primary code under 9004.10. The lens material affects sub-classification in the EU and UK, where optically worked glass and plastic lenses take different CN codes.
9004.90. Sun readers are reading glasses with tinted lenses, which makes them corrective devices. Declaring them as sunglasses because they are dark is one of the most common reclassification findings for eyewear importers.
As sets under GRI 3(b), classified by the component that gives the set its essential character. In CBP ruling NY M83291, sunglass kits with clips, cloths, and cases were classified as sunglasses in 9004.10, because the sunglasses imparted the essential character.