To file for 50/50 custody in California, you open a family law case in the Superior Court of the county where your child lives, submit a petition and a Request for Order with a detailed parenting plan, pay the $435 filing fee, serve the other parent, attend mandatory mediation, and present your plan at a hearing. The forms differ depending on whether you were married to the other parent, and the parenting plan you attach is what the judge actually scrutinizes.
What California Courts Presume About Equal Time
Before you file, know what you’re walking into. California Family Code Section 3040 says the law has no preference for or against joint custody, sole custody, or any particular arrangement. Judges decide based on the child’s best interest.1California Legislative Information. California Family Code FAM 3040
The one thing that shifts the odds is agreement. Under Family Code Section 3080, if both parents ask for joint custody, the court presumes it serves the child’s best interest.2California Legislative Information. California Family Code FAM 3080 If the other parent opposes 50/50, you carry the burden of showing the court why equal time works for your child. The child’s health, safety, and welfare govern every decision the judge makes.3Child Welfare Information Gateway. Determining the Best Interests of the Child – California
The Forms You Need to File
Which forms you use depends on whether you were married to the other parent.
If You Were Married
Open the case with a Petition (FL-100) and Summons (FL-110). The petition starts the family law case; the summons is what notifies the other parent.4Judicial Branch of California. You Were Served Divorce Papers To get specific custody orders, file a Request for Order (FL-300) at the same time.5California Courts. FL-300-INFO Information Sheet for Request for Order
If You Were Not Married
Use a Petition to Determine Parental Relationship (FL-200) instead of FL-100. That form establishes legal parentage and lets the court make custody orders in the same case.6Judicial Branch of California. Petition to Determine Parental Relationship (Uniform Parentage) FL-200 You still need FL-110 and FL-300.
Forms Every Filer Attaches
- FL-105, the Declaration Under Uniform Child Custody Jurisdiction and Enforcement Act, which tracks where your child has lived for the past five years so the court can confirm it has jurisdiction.7California Courts. FL-105 Declaration Under Uniform Child Custody Jurisdiction and Enforcement Act (UCCJEA)
- FL-311, the Child Custody and Visitation Application Attachment. Your proposed 50/50 schedule goes here in detail.8California Courts. FL-311 Child Custody and Visitation Application Attachment
- FL-150, the Income and Expense Declaration, required by California Rule of Court 5.260 before any support hearing. Parents with simpler finances may qualify to use FL-155.9Judicial Branch of California. Rule 5.260 General Provisions Regarding Support Cases
On the forms, request both joint legal custody and joint physical custody explicitly. Joint legal custody covers shared decision-making over education, healthcare, and other major issues. Joint physical custody covers where the child actually lives. Asking for both signals you want full shared involvement, not weekend visitation.
Writing a Parenting Plan the Judge Will Approve
A judge will not sign an order that says “50/50.” You need a schedule concrete enough to enforce. This is what goes on FL-311.
The Weekly Rotation
Two patterns dominate. A 2-2-3 schedule gives one parent Monday and Tuesday, the other Wednesday and Thursday, and alternates the Friday-through-Sunday block. Transitions are frequent, but the child sees each parent every few days. A week-on/week-off schedule gives each parent seven consecutive days. Fewer handoffs, longer gaps. Which one fits depends on the child’s age, the distance between homes, and each parent’s work hours.
Holidays and School Breaks
Write out every major holiday, birthday, and school break. Alternating years is the standard approach: one parent has Thanksgiving in even years, the other in odd years. Winter and summer breaks can be split in half. Language like “parents will share holidays” gives the judge nothing to enforce and guarantees future arguments.
Right of First Refusal
A right-of-first-refusal clause gives the other parent the chance to take the child when the parent on duty cannot be there. If you include one, set a minimum absence that triggers it, typically four hours or more, and carve out normal childhood activities like sleepovers. Without those limits, the clause becomes a source of conflict rather than a benefit.
Geographic Limits
Equal time only works when both parents live close enough to make handoffs practical. Family Code Section 3024 already requires 45 days’ written notice before a parent can move with the child for more than 30 days. Adding a geographic clause, such as requiring both parents to live within a defined radius of the child’s school, reinforces that limit and shows the judge you’ve planned for the long term.
Filing at the Courthouse
Take your originals and at least two copies to the clerk’s office at the Superior Court in the county where your child lives. The clerk stamps everything, assigns a case number, and sets a hearing date. Many counties allow electronic filing if you’d rather not go in person.
The filing fee for the first paper in a family law case is $435 as of January 2026.10California Courts. Superior Court of California Statewide Civil Fee Schedule Effective January 1, 2026 Riverside, San Bernardino, and San Francisco counties add a local construction surcharge. If you cannot afford the fee, file a Request to Waive Court Fees (FW-001). You qualify if you receive public benefits, earn a low income, or can show paying would prevent you from covering basic household needs.11Judicial Council of California. FW-001 Request to Waive Court Fees
Serving the Other Parent
You cannot hand the papers to the other parent yourself. Someone at least 18 years old who is not part of the case has to deliver the stamped copies. That can be a friend, a relative, or a professional process server.
The server then completes a Proof of Service of Summons (FL-115) describing when, where, and how they delivered the papers, and you file the completed FL-115 with the court.12Judicial Branch of California. Serve Papers by Substituted Service Without proof of service on file, your case cannot move forward. The other parent has 30 days to file a response if they live in California and 40 days if they live out of state.
Mandatory Mediation
California requires mediation before a judge will hear a contested custody dispute. The court schedules the session automatically after you file. What happens in mediation depends on your county, and the difference matters.
Most counties use the Child Custody Recommending Counseling (CCRC) model. A mental health professional meets with both parents and helps them try to reach an agreement. If parents agree, the counselor drafts terms for the judge to sign. If they cannot agree, the counselor writes recommendations and sends them to the judge, with copies provided to both parents and any attorneys before the hearing.13California Legislative Information. California Family Code FAM 3183 Judges frequently follow those recommendations, so mediation in a CCRC county often carries as much weight as the hearing itself.
A smaller number of counties use a confidential model. The mediator helps parents negotiate but does not report to the judge if they can’t reach agreement.14California Courts. Family Court Services Mediation / Child Custody Recommending Counseling Models Data and Analysis Report Call your local court clerk to find out which model applies. If you’re in a CCRC county, prepare for mediation as if it were trial.
The Hearing
At the hearing, the judge reviews your parenting plan, any CCRC recommendation, and both parents’ financial disclosures. Each parent can present evidence and answer questions. The judge weighs the request against the best-interest factors in Family Code Section 3011:
- The child’s health, safety, and welfare, which governs everything else.
- Any history of abuse by a parent against the child, the other parent, or a family member.15California Legislative Information. California Family Code FAM 3011
- Habitual or ongoing drug or alcohol abuse by a parent.
- The state’s policy favoring frequent and continuing contact with both parents, which generally supports a 50/50 request when no safety issues exist.3Child Welfare Information Gateway. Determining the Best Interests of the Child – California
The judge may issue temporary orders and set a trial date for permanent orders. If both parents agree and the plan is solid, the judge can enter a permanent order the same day. The order will spell out legal and physical custody, the schedule, holiday allocation, and any conditions the judge sets.
Child Support in a 50/50 Arrangement
Equal time does not mean no child support. California calculates support using a statewide formula under Family Code Section 4055 that factors in each parent’s net disposable income and the percentage of time the child spends with each parent. Even in a true 50/50 split, the higher-earning parent usually owes support because the formula is designed to keep the child’s standard of living roughly equal across both homes. Support is calculated against the timeshare written into the court order, not what happens in practice.
Both parents must file an Income and Expense Declaration (FL-150) completed within three months of the hearing, thorough enough for the court to run the guideline calculation.9Judicial Branch of California. Rule 5.260 General Provisions Regarding Support Cases Incomplete disclosures are one of the fastest ways to stall your case.
Who Claims the Child on Taxes
Only one parent can claim the child as a dependent in a given tax year. When parents share exactly equal overnights, the IRS treats the parent with the higher adjusted gross income as the custodial parent, and that parent gets the child tax credit by default.16Internal Revenue Service. Form 8332 – Release/Revocation of Release of Claim to Exemption for Child by Custodial Parent
Parents who want to alternate years can use IRS Form 8332. The custodial parent signs it to release the claim for specific tax years, and the other parent attaches it to their return.17Internal Revenue Service. About Form 8332, Release/Revocation of Release of Claim to Exemption for Child by Custodial Parent With more than one child, some parents divide, each claiming one every year. Whatever you choose, put it in the custody agreement so the court order makes it enforceable.
Changing the Order Later
Custody orders can be modified. Under Family Code Section 3087, a court can change or end a joint custody arrangement if the change serves the child’s best interest, and if the other parent opposes it, the judge must give written reasoning.18California Legislative Information. California Family Code FAM 3087 New work hours, a child starting school, or a planned move are common reasons parents come back.
For any move, Family Code Section 3024 requires 45 days’ written notice before changing the child’s residence for more than 30 days. Skipping notice shifts how the judge sees your willingness to cooperate. To ask for a modification, file a new Request for Order (FL-300) with an updated FL-311 showing the proposed schedule. Mediation and a hearing follow the same track as the original filing. Courts favor stability, so a modification built around a parent’s convenience rather than the child’s needs rarely succeeds.