tax base

tax base (plural tax bases)

1. Everything that can be taxed by a particular government body, such as individuals' incomes, property, and inventory subject to sales tax.

• taxable income

• “tax base”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.
• “tax base”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present.