The Colorado Assembly has made the most significant set of changes to the child support statutes in several years, and these changes came into effect on January 1, 2017.
Retroactive Modification of Support
When the parents have agreed to a voluntary change in custody, C.R.S. 14-10-122(5) provides that trial courts may modify child support retroactive to the date of the change. Note use of the term “may” - the court has discretion whether to make the support change retroactive at all, and if so, how far back to go.