This alimony calculator is intended only to give a general idea of your spousal maintenance calculations. Alimony Laws in IL determine spousal support based on marriage length, income disparity, and ability to be self-sufficient.One of the most important and often contentious issues in divorce is alimony, also known as spousal support or maintenance. Learn how to make a fair spousal maintenance agreement in Illinois. If you have questions about alimony, call divorce lawyer Roger W. Stelk at 847-506-7330. Everything you need to know about maintenance (formerly "alimony") in Illinois divorce cases. A request is made through a Motion filed with the Court asking for an award of spousal support. Call 6305040176 to speak with a Wheaton divorce attorney about modifying or terminating an order for spousal support. In Illinois, the law provides for temporary maintenance during the course of the divorce proceedings. For divorcing couples in Chicago, a spousal maintenance buyout may present an option worth considering.