Systems and methods are provided for classifying a new item for purposes of estimating import fees associated with shipping the item internationally. In some embodiments, the classification is determined by calculating a similarity score for each of a plurality of previously classified items, each similarity score representing the similarity between a given previously classified item and the new item, identifying a similar item match for the new item, the similar item match corresponding to the previously classified item having the highest similarity score among the plurality of previously classified items, and assigning an item classification code associated with the similar item match to the new item.