This article argues that the properly conceived fairness norm for taxation leads to a personal realization income tax. Fairness in taxation refers to “allocative tax fairness,” that is, the ethical/political standard according to which taxes are to be apportioned among the relevant population. In concrete terms, the standard constitutes the tax base for individual taxpayers. Allocative fairness is but one norm bearing on taxation, but it is one that (in academia, at least) has unjustifiably taken a back seat to economics and welfarist norms, largely due to the perception that allocative tax fairness lacks any specific content apart from the speaker’s political and personal tastes and, therefore, by implication, is without independent normat...