Customs duties, or import taxes, are charges levied by a government on goods imported into a country. These charges are usually based on the value of the goods being imported and are designed to raise revenue for the government while protecting domestic industries from foreign competition. Synonyms for customs duties include import fees, tariffs, levies, excise taxes, and import duties. Other related words might include customs tariffs, import charges, and trade taxes. Whatever they are called, these charges are an important source of revenue for many countries and can have a significant impact on international trade and the global economy.