Child support is based on a Child Support Guideline Schedule. Oklahoma uses the Income Shares Model, which takes into account each parent's gross income. Oklahoma courts deviate from the standard computation only if one parent is paying dental or medical insurance for the child, when parents have joint custody, or when one parent pays child care expenses or compensates for a child's special medical, educational or transportation needs. If there is a disparity between the two parents' respective incomes, the parent who earns more money may pay child support to the other.