tax base
noun [ C, usually singular ]
ECONOMICS, TAX ukusthe combined value of everything such as income, property, and other assets in a city, country, etc. on which tax is charged:
With more than 80% of the city's tax base provided by property owners, new revenue from businesses is needed.
broaden/expand/widen the tax base The Chancellor needs to broaden the tax base to raise more revenue.
a dwindling/growing tax base
the corporate/property/sales tax base
cut/increase/protect the tax base