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California Child Custody Agreement

Agreeing to joint custody in California shifts the burden of proof, but only within limits the statute sets out.

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Introduction

A California Child Custody Agreement is a written arrangement between two parents covering legal custody, physical custody, and a parenting time schedule. California is one of a small group of states where the act of agreeing has a defined legal consequence. Under Family Code section 3080 there is a presumption, affecting the burden of proof, that joint custody is in the best interest of a minor child where the parents have agreed to joint custody or so agree in open court. That is a real advantage, and it is also narrower than it first sounds. It attaches to an agreement for joint custody specifically rather than to any parenting arrangement, and the statute makes it expressly subject to section 3011, the best-interest provision that includes domestic violence. California also leaves more to the parents than most states: it does not require a parenting plan at all, and its move-away notice duty applies only if an order says so.

Key Things to Know

  1. 1

    Agreeing to joint custody changes the burden of proof. Family Code section 3080 creates a presumption that joint custody is in the child's best interest where the parents have agreed to it, either in a written stipulation or in open court. Outside that agreement, section 3040 states there is neither a preference nor a presumption for or against joint legal custody, joint physical custody, or sole custody.

  2. 2

    The presumption is not unconditional. Section 3080 makes it expressly subject to section 3011, the best-interest provision. Agreeing to joint custody improves your position; it does not guarantee the outcome, and the court retains the duty to decide what is in the child's best interest.

  3. 3

    The presumption covers joint custody only. Section 3002 defines joint custody as joint physical custody together with joint legal custody. An agreement for some other arrangement, such as sole physical custody with joint legal custody, is perfectly valid but does not attract the section 3080 presumption.

  4. 4

    California's statutory factor list is short. Section 3011 directs the court to consider a small number of specified matters among any other factors it finds relevant, so it operates as a floor rather than a closed checklist. A long agreement that addresses practical detail is more useful here than one written to satisfy a list.

  5. 5

    There is no parenting plan requirement. Section 3040 leaves it to the court's discretion whether to require an implementation plan. What is prescribed is the contents of the resulting order, so the practical target when drafting is the order the court will sign rather than a statutory plan format.

  6. 6

    Move-away notice is opt-in. Section 3024 provides that the court may specify that a parent notify the other before changing the child's residence for more than 30 days. The trigger is duration, not distance, and there is no automatic statewide notice duty. Whether your family has one depends on what your own agreement and order say, which makes this worth addressing expressly.

  7. 7

    Domestic violence changes the analysis substantially. Family Code section 3044 creates a rebuttable presumption against awarding sole or joint custody to a person found to have perpetrated domestic violence within the previous five years. The version operative from January 2026 sets the rebuttal standard at a preponderance of the evidence. If there has been abuse or a protective order, this is a situation for a lawyer rather than a form.

Key decisions before you file

Before you file a Child Custody Agreement in California, a few decisions shape the document: which option to choose and what each one means. The Child Custody Agreement guide walks through them.

Open the Child Custody Agreement guide

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California Requirements for Child Custody Agreement

  • State the joint custody election for Fam. Code 3080

    Record expressly whether the parents agree to joint custody. The section 3080 presumption attaches only to an agreement for joint custody, so an unclear election forfeits the benefit.

  • Acknowledge Fam. Code 3080 is subject to section 3011

    The presumption is expressly subject to the best-interest provision. The agreement should not be drafted as though agreement alone determines the outcome.

  • Use the Fam. Code 3002 definition of joint custody

    Joint custody means joint physical custody together with joint legal custody. Where the parents intend a different arrangement, say so plainly rather than using the term loosely.

  • Allocate legal custody and decision-making

    Specify whether legal custody is joint or sole and identify who decides on education, non-emergency medical and dental care, mental health treatment, and religious upbringing.

  • Make the schedule specific as to time, day, place, and manner

    Set out the residential schedule and exchange arrangements with enough precision to be entered and enforced as an order, including holidays and school breaks.

  • Address residence change notice under Fam. Code 3024

    Notice is something the court may specify rather than an automatic duty, and the trigger is a change of residence exceeding 30 days with no distance threshold. Write the notice obligation into the agreement if the parents want one.

  • Preserve the Fam. Code 3044 domestic violence presumption

    The rebuttable presumption against custody to a perpetrator of domestic violence cannot be waived by agreement. The rebuttal standard is a preponderance of the evidence under the version operative from January 2026.

  • Note mediation under Fam. Code 3170

    Contested custody and visitation issues are set for mediation before hearing. Including a good-faith mediation step for future disputes aligns the agreement with how California handles disagreement.

  • Submit as a stipulation for entry as an order

    Include an undertaking to submit the agreement to the court for entry, and record that it is not enforceable as a custody order until entered.

Frequently Asked Questions