Between 2010-2014, foundations spent at least $301 million on evaluation of education-related causes. To govern their evaluation practice foundations are developing evaluation policies. Evaluation policies encompass most aspects of evaluation practice and theory, making it a critical area of research on evaluation (Trochim, 2009). They can aid or constrain the crucial work of foundations and nonprofits. Yet, extant research paints evaluation policy in broad strokes. Two taxonomies have been proposed that identify components of evaluation practice that may be in evaluation policies. Little is known about how these taxonomies align with evaluation policies of foundations. This paper first compares evaluation policies from 12 foundations to the taxonomies. Then, modifications to the taxonomies are discussed and an updated taxonomy is shared.