The Saver's Credit, enacted in 2001, provides a government matching contribution, in the form of a nonrefundable tax credit, for voluntary individual contributions to 401(k)-type plans, IRAs, and similar retirement savings arrangements. This paper provides background on the evolution and design of the Saver's Credit, discusses the rationale behind the Saver's Credit and the role of such a credit in the retirement income security system as a whole, examines empirical data and models of the revenue and distributional effects of the Saver's Credit, and discusses measures that would expand the scope and improve the efficacy of the Saver's Credit.