If you have minor children and are paying or receiving child support, you are probably already aware that the timeshare percentage, or the percent of time that the child/ren are with each parent, plays a role in determining the amount of guideline child support. Once two parents have set a schedule and determined when the child/ren will be with each parent, it would appear that determining a timeshare percentage is a piece of cake. But, while this may be clear in many cases, there are certain situations where the timeshare percentage can become a contested issue that may end up having to be litigated in court.