In this essay, the authors examine a congressional proposal -- the Educational Choice for Children Act (ECCA) -- to allow taxpayers to redirect their federal tax dollars to organizations that would provide funding for students to enroll in private school or to help pay for outside educational supports. Based on the implementation of similar state-level programs and the proposed federal program's requirements, the authors predict that most of the funding will be allocated toward private school tuition. Members of Congress considering whether to pass the ECCA into law should assess the potential uneven impact this policy would have across states and student demographics. Further, this analysis of potential ECCA funding indicates that private school seats are slightly underallocated to areas serving higher shares of students below the federal poverty level, relative to higher-income areas. Given the broad parameters under which SGOs can operate, it is difficult to predict exactly how the policy might be implemented, which might generate additional risk for an unequal allocation. [This essay was funded by the Resource Equity Funders Collaborative.]