While it is possible for an individual to be required to pay both child support and spousal support, the two payments do not overlap. In this article, learn about how spousal maintenance is ordered, the requirements to be eligible for spousal maintenance, and other important information.Does Texas Have an Alimony Calculator? Unlike with child support, Texas doesn't have a formula for calculating spousal maintenance. Using a Child Support Calculator in Texas. A child support calculator helps you estimate what you might pay or receive. These forms allow parents, families, and employers to provide the Child Support Division with additional information so we can better serve you. This calculator provides an estimate for a single source of income. When calculating child support in Texas, it is based solely on the income of the obligor (the person who's obligated to pay). The Texas Family Code says the courts may order either parent or both to provide financial support for children from a relationship.