<p>My college has flat rate tuition for between 12 and 21 credits per semester. In addition, you can take more, at no additional charge, with advisor permission. The most I’ve taken during a semester has been 23 (I know someone who took, I think, 25); the least I’ve taken has been 16 during my last semester, as I’ve completed all my course work and am just doing thesis/research/practicum. All other semesters, I’ve taken between 19 and 21. I definitely couldn’t have afforded to double major and minor without flat rate tuition!</p>