Overview
Child support orders in California are not permanent. They can be changed (modified) when there is a valid reason and the proper legal process is followed. Modifications are typically made using court forms, including a Stipulation to Establish or Modify Child Support and Order (Form FL-350) when both parents agree, or through a court motion when they do not.

1. A Change in Circumstances Is Usually Required
In most cases, the court will only modify child support if there has been a significant change in circumstances, such as a change in either parent’s income, a change in custody or visitation time, job loss or a new job, or changes in the child’s needs (such as medical or educational expenses). However, if the original order was set below the statewide guideline amount by agreement, the law may allow modification up to the guideline level without requiring a change in circumstances.

2. Guideline Support Controls the Outcome
California uses a statewide formula to calculate child support. When reviewing a modification request, the court recalculates support based on updated income and custody information, compares it to the existing order, and determines whether the current amount still complies with guideline requirements.

3. Agreements Between Parents (Stipulations)
If both parents agree to modify child support, they can sign a stipulation (Form FL-350) and submit it to the court. This can avoid a court hearing and allow for a faster resolution. Even with agreement, the judge must still approve the terms to ensure they are fair and in the child’s best interest.

4. Financial Information Is Required
Modifying child support generally requires updated financial information, including each parent’s income, custody/time-share percentages, and any additional expenses such as childcare or health insurance. This ensures the new order reflects current circumstances.

5. Court Approval Is Required
Any modification must be reviewed and approved by a judge. Once approved, the new child support order becomes legally enforceable and may include wage withholding and adjustments for additional expenses.

6. When the Modification Takes Effect
Once the court issues the new order, the updated child support amount goes into effect and replaces the prior order. It may also include enforcement mechanisms such as wage garnishment and allocation of additional costs.

In Short
Child support can be modified when circumstances change or when both parents agree to new terms. The court will always ensure the updated amount follows California guideline rules and serves the child’s best interests.