In a 2005 study, Krop and Zimmern (2005) found:
...Charter schools receive $1,801 less per pupil than conventional public schools. In California, the disparity was greater, with charter schools receiving $2,223 less per pupil. The authors argued that these differences are driven primarily by the lack of facility funding, but other factors may contribute to the shortfall. We argue one such factor is the lack of participation in state and federal categorical programs. (p. 4)
Similarly, Batdorff, Maloney, May, Doyle, and Hassel (2010) found a significant disparity between the funding of charter schools and public schools, highlighting that on average charter school funding lagged public school funding by 19.2 percent of the expected public school budget, or $2,247 per student. They argued that demographic differences, such as financial need, disability level, and grade level, could not explain the observed disparity in funding (p. 1).
Bull (2007) maintained that school finance could play an important role in social justice.
INEQUALITIES OF CHARTER SCHOOL FUNDING