The current U.S. income tax system subsidizes contributions to charities by allowing individual taxpayers to itemize and deduct contributions from taxable income. In effect, taxpayers can receive a rebate from the government based on the contributions they make to charitable organizations. Under one alternative system, the government matches the contributions of individual taxpayers at some rate between 0 percent and 100 percent. This paper explores the tax policy and administrative implications of matching rather than rebating contributions in a tax system with voluntary reporting. We conduct a novel experiment to examine both charitable giving and compliance behavior under the two regimes.