100% of what you donate goes directly to the kids. There is zero overhead. We went to visit the doctors last year and they showed us exactly where the money went. Some treatments that are now lifesaving have been created via this funding. What is great is at mile 18 they bring the kids out to cheer us on. They give us high 5s and go crazy. The doctors all hand out water. It is impossible to run by and not be affected.