Modifying Child Support in Colorado

Generally,  the provisions of any decree respecting child support may be modified only as to installments accruing subsequent to the filing of the motion for modificationand only upon a showing of changed circumstances that are substantial and continuing or on the ground that the order does not contain a provision regarding medical support, such as insurance coverage, payment for medical insurance deductibles and copayments, or unreimbursed medical expenses.

Modification of child support can neverthelss be in fact retroactive to a date prior to the motion for modification in instances where a mutually agreed change in physical care of occurs.  In such cases child support can be modified back to the date the agreed upon change in care occured.