- noun the principle that people with different incomes should pay different rates of tax
- noun fairness in dealing with individuals with different incomes. This is the basis for progressive taxation.
- (written as Vertical Equity)Treating appropriately unequally those who are unequal in some morally relevant sense. Commonly met vertical equity principles include 'higher contributions from those with greater ability to pay ', 'more resource for those with greater need for resource' and 'lower priority for lower deservingness'.