This article considers the relative efficiency of marginally redistributing income from high- to low-income households. Additional spending on a negative income tax is compared with spending on an earnings or a wage subsidy. One set of reforms imposes the same burden on the nonpoor, and another set redistributes the same net benefit to the working poor. Additional spending on a negative income tax is more efficient than spending a similar amount on an earnings subsidy (the Earned Income Tax Credit), for some reforms and parameters. The wage subsidy is the most efficient, independent of parameters or type of reform.