The tax basis of Anhui Water Conservancy Fund is determined according to the income excluding tax. Water conservancy fund is a local policy, and the collection methods and tax rates of water conservancy funds vary from place to place. In Anhui province, the tax basis of water conservancy funds is calculated on the basis of tax-free income. The tax authorities that collect water conservancy funds determine the amount of water conservancy funds that should be paid according to the tax-free income of enterprises or individuals.