Value-added tax is a type of levy that is applied at each step of a transaction chain, from basic inputs to the final good or service. The amount assessed is based on the value added by an organization (hence the name) when a transaction occurs. VAT is used throughout the world because, historically, it has been harder to evade compared to income taxes. VAT is a common method of national taxation: Approximately 85% of countries impose it worldwide. A notable exception is the United States, where sales and use taxes are imposed at the state and local level and applied only to the price of the final good or service. As commerce has become global and cross-border sales have increased, traditional methods for calculating, applying and complying with VAT regimes has grown more complex. To achieve higher tax revenue while ensuring better compliance, governments are turning to technology to make collections more effective while making processes more efficient.