Last Updated: July 2026
In California, child support generally starts when a parent formally opens a qualifying case and files a request for support – not automatically on the date of separation or the child’s birth. Until an order is entered, there is usually no enforceable monthly support obligation (except in limited situations involving prior orders).
When Does Child Support Start in California?
Support begins after a court (or DCSS process that results in an order) issues a child support order based on a properly filed request. Common case types that can include support are divorce, legal separation, dissolution of a domestic partnership, parentage actions, petitions for custody and support, and certain domestic violence restraining-order cases. Details on guideline support are on our child support page.
Do You Need a Request for Order (FL-300)?
In most Superior Court cases, yes – a parent files Judicial Council form FL-300 (Request for Order) asking for guideline or non-guideline support, add-on expenses, and related relief. The request should clearly state what you want the judge to order. It is not a place to air unrelated grievances about the other parent.
What Information Does the Judge Need?
- Whether you want an initial order or a modification
- Guideline vs. non-guideline support, plus mandatory or discretionary add-ons
- Timeshare / current parenting schedule
- Income and expense information for both parents
- Preferred payment method (for example, wage garnishment vs. direct pay)
Can Support Be Ordered Retroactively?
California courts can sometimes make support effective as of the filing date of the request (or another date allowed by statute and the facts). That is one reason filing promptly matters – delays can leave you covering child expenses alone with limited ability to recover those months later.
Questions about when support starts? Schedule a Confidential Consultation
What If You Are Not Married?
Unmarried parents can still obtain support, but parentage may need to be established first (or alongside the support request). Custody and support petitions, DCSS cases, and parentage actions are common paths. See also child custody for parenting-time issues that affect guideline calculations.
What About Temporary Support During a Divorce?
Judges can issue temporary (pendente lite) child support early in a divorce so children are supported while the case is pending. Temporary orders can later be replaced by a judgment after settlement or trial.
Frequently Asked Questions
Does child support start at separation automatically?
No. Separation alone does not create an enforceable support order. You generally need a filed case and a formal request that results in an order.
Does child support start at the child’s birth?
Not automatically. A parent (or DCSS) must take legal steps to establish parentage if needed and obtain a support order.
Can DCSS start support without a divorce?
Yes. DCSS can open a case to establish parentage and support even when the parents were never married and no divorce is filed.
When does a modification take effect?
Modifications typically require a new Request for Order. The effective date depends on filing date, notice, and what the court orders – do not simply stop paying an existing order.
What if the other parent is already paying informally?
Informal payments can help the child, but they are harder to enforce or credit without a court or DCSS order. Formalizing support protects both parents.
