The American Institute of Certified Public Accountants (AICPA) has rolled out the long-awaited update of its accounting and review standards. Statement on Standards for Accounting and Review Services (SSARS) No. 21, Statements on Standards for Accounting and Review Services: Clarification and Recodification, represents one of the AICPA’s most significant revisions of its nonaudit standards since 1979. Among other things, the guidance creates a bright line between accounting (or preparation) services and reporting (compilation or review) services and lays out distinct requirements for each type of service. This article outlines what the clarified guidance means to those who use CPAs to perform nonaudit services — including reviews, compilations, and financial statement preparations — to report their historical and prospective financial results.