In principle, wages increase every year, and so does the cost of living (inflation), so child support is also increased annually. This is known as indexing. To this end, each November, the government sets the percentage by which the current alimony must be adjusted in January of the following year. However, this increase is not mandatory. You and your ex-partner can agree that you do not want the statutory indexation to apply; for example, maybe your wages will not change. In addition, you can choose not to apply indexing for a certain period of time. In both cases, you must submit this to the court.