How to Change a Custody Agreement in Texas: Grounds, Filing, and Costs

To change a custody agreement in Texas, you file a Petition to Modify the Parent-Child Relationship in the same court that issued the original order, then show the judge that circumstances have materially and substantially changed since that order was signed and that the change you’re asking for serves the child’s best interest. The filing fee is $80. If both parents agree, the process can wrap up in a short prove-up hearing. If they don’t, expect a contested case that can run several months to over a year.

What You Have to Prove

Texas Family Code Section 156.101 gives a court three separate grounds to modify a conservatorship, possession, or access order. You only need one, and every modification also has to serve the child’s best interest.

A material and substantial change in the circumstances of the child, a parent, or another person affected by the order since it was signed. This is the most common path. Examples include relocation, remarriage, job loss, incarceration, substance abuse, or a meaningful shift in the child’s needs as they age.
A child who is at least 12 years old has told the judge, in a private chambers interview, which parent they want to have the right to choose their primary residence.
The parent with the right to designate the child’s primary residence has voluntarily given up primary care and possession of the child to someone else for at least six months. A temporary handoff during military deployment does not count.

The change-in-circumstances standard is where a lot of petitions fail. The change has to be real, ongoing, and tied to the child’s welfare. Switching jobs or wanting a different weekend schedule usually isn’t enough. Judges look for changes that meaningfully affect the child’s daily life, safety, or emotional development. ¹

The One-Year Rule

If fewer than 12 months have passed since the current order was signed and you’re asking to change which parent has the right to designate the child’s primary residence, the bar is higher. You have to file a sworn affidavit with supporting facts that establishes one of three things:

The child’s present environment may endanger the child’s physical health or significantly impair the child’s emotional development.
The parent who currently holds the right to designate the primary residence is the one seeking or consenting to the modification, and the change is in the child’s best interest.
That parent has voluntarily relinquished primary care and possession of the child for at least six months, and the change is in the child’s best interest.

The court won’t even schedule a hearing unless the affidavit contains facts adequate to support the claim. If you’re inside that first year and no one is in danger, you’ll likely need to wait. ²

Who Can File

Either parent can file. Certain non-parents also have standing — a guardian, DFPS, and, in limited circumstances, a person who has had exclusive care, control, and possession of the child for at least six months ending no more than 90 days before filing. As of September 1, 2025, the caregiver standard tightened from “actual” to “exclusive” care, so shared caregiving arrangements are less likely to qualify. ³

Filing the Petition

The modification starts with a document called the Petition to Modify the Parent-Child Relationship. It goes in the same court that issued the original order, because that court keeps continuing exclusive jurisdiction over the case. Blank forms are available through TexasLawHelp.org. ⁴

The petition needs to identify the parties, the children, the existing order you’re modifying, and the specific changes you want. Be precise. Say whether you’re asking to change conservatorship rights, the possession schedule, child support, a geographic restriction, or some combination, and lay out the factual basis for each.

Filing Fee and Fee Waiver

The clerk collects an $80 fee for the modification petition, and no additional filing fees can be charged for the same action. ⁵

If you can’t afford it, file a Statement of Inability to Afford Payment of Court Costs. You qualify if you receive means-tested benefits like SNAP, TANF, Medicaid, or SSI; if a legal aid attorney represents you; or if paying court costs would keep you from meeting basic household needs. A granted waiver covers the filing fee, service of process, copies, and other court charges. ⁶

Serving the Other Parent

Once you file, the other parent has to be formally served with the petition and a citation. Three routes are available:

Personal service by a constable, sheriff, or private process server. The other parent doesn’t have to sign anything.
Certified or registered mail with return receipt requested, sent by the clerk, a constable, a sheriff, or a process server. Service is only valid if the other parent signs the return receipt.
A signed Waiver of Service, if the other parent is cooperative. That skips formal delivery entirely.

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If Both Parents Agree

An agreed modification is much simpler and much cheaper. You still file the petition, but the other parent can sign a Waiver of Service or a Respondent’s Original Answer instead of being formally served. Both parents sign the proposed Order Modifying the Parent-Child Relationship, and you bring the package to court for a short prove-up hearing where the judge confirms the agreement serves the child’s best interest. ⁸

Even in an agreed case, paying a family law attorney to review the forms before you file is usually worth it. Sloppy language in the proposed order creates ambiguity that turns into enforcement fights later. The TexasLawHelp forms are built for agreed and default cases. If the other parent starts contesting, you’re in a different process.

If the Other Parent Contests

A contested modification follows a litigation path that can stretch from several months to over a year.

Discovery

Both sides exchange information under oath: written questions, requests for documents like financial records and communications, and sometimes depositions. In child support cases, plan to produce tax returns, pay stubs, and documentation of expenses.

Mediation

Most Texas courts require or strongly encourage mediation before letting a case go to trial. A neutral mediator helps both parents identify common ground and work toward a settlement. The mediator doesn’t decide who’s right and doesn’t give legal advice. If the parents reach a resolution, the mediator drafts a written agreement that becomes binding once the court approves it. ⁹

Mediation resolves a large share of contested custody disputes. Costs vary. Some courts offer low-cost or sliding-scale programs; private mediators generally charge by the hour or half-day. Even when it doesn’t produce a complete deal, narrowing the disputed issues saves time and money at trial.

Trial

If mediation fails, the case goes to trial before a judge. Both sides put on evidence and testimony, and the judge issues a ruling that replaces the relevant portions of the prior order.

How Judges Decide Best Interest

Best interest is the primary consideration in every conservatorship and possession decision under Section 153.002. ¹⁰ For joint managing conservatorship, Section 153.134 lists specific factors: whether the child’s physical, psychological, and emotional development would benefit; each parent’s ability to prioritize the child and share decisions; whether each parent encourages a positive relationship with the other; how involved each was in child-rearing before suit was filed; how close the parents live; and, for a child 12 or older, that child’s preference on who should designate the primary residence. ¹¹

Beyond the statutory checklist, judges pay attention to stability and continuity. A parent who can show a consistent, safe home and a track record of supporting the child’s relationship with the other parent tends to do better. Documented evidence of domestic violence, substance abuse, neglect, or a pattern of undermining the other parent can be decisive. Vague claims about the other parent’s shortcomings carry little weight without school records, medical documentation, or testimony from people with direct knowledge.

If your child is 12 or older, the court must interview the child in chambers when any party or the child’s attorney requests it. For a younger child, the interview is discretionary. Either way, the child’s stated preference is one input; the judge still decides. ¹²

Emergencies and Temporary Orders

A modification case can take months, and sometimes the child’s situation can’t wait. While the suit is pending, the court can issue temporary orders addressing temporary conservatorship, temporary child support, restraining a party from disturbing the child’s or a party’s peace, prohibiting removal of the child from a defined area, and payment of attorney’s fees and costs. Violating a temporary order is punishable by contempt. ¹³

There is a hard limit on using a temporary order to change who designates the child’s primary residence, or to change a geographic restriction. The court can only do that if the child’s present circumstances would significantly impair physical health or emotional development, if the custodial parent has voluntarily given up primary care for more than six months, or if a child 12 or older has told the judge in chambers which parent they prefer. A motion asking for this kind of temporary change has to include a sworn affidavit with specific supporting facts, and the court will deny it outright if the affidavit is thin. ¹⁴

In a genuine emergency involving credible evidence of abuse, neglect, family violence, or a parent threatening to flee with the child, the court can issue a temporary restraining order without the affidavit requirements that apply in other civil cases. Orders that physically remove a child from a parent or exclude a parent from access generally still require a verified pleading or affidavit and notice to the other side, unless a governmental entity is seeking emergency possession under Chapter 262.

Changing Child Support

Child support modifications work slightly differently. There are two ways in.

The first is the three-year review rule. If at least three years have passed since the current support order was established or last modified, either parent can ask for a review. The modification is available if the guideline-recalculated amount differs from the existing order by either $100 per month or 20%. You don’t have to prove a material and substantial change under this path; the time and the numerical gap do the work.

The second is a material and substantial change in circumstances, available at any time. Common triggers include a significant income change for either parent, a job loss, a new support obligation for another child, or a change in the child’s medical or educational needs.

Guideline percentages apply to the paying parent’s monthly net resources: 20% for one child, 25% for two, 30% for three, 35% for four, and 40% for five or more. Reduced percentages apply below $1,000 in monthly net resources. ¹⁵ The percentages only apply up to a cap on monthly net resources that adjusts for inflation every six years. Effective September 1, 2025, the cap rose from $9,200 to $11,700. Above that, the court calculates on $11,700 unless proven needs justify more. Because the cap moved, many existing orders now sit below what the guidelines would produce, which can itself be a reason to invoke the three-year review.

Relocation and Geographic Restrictions

Many Texas orders include a geographic restriction that keeps the child’s primary residence inside a defined area, often a county or set of contiguous counties. If you need to move outside that area, file the modification petition before you move. The existing order stays in effect until a court changes it. ¹⁶

If both parents agree, an agreed modification handles it. If the other parent objects, you have to prove the relocation meets the general standard under Section 156.101: material and substantial change plus best interest. ¹

When one parent’s move raises travel costs for the other parent’s possession time, the court can reallocate those costs on a fair and equitable basis. There is a rebuttable presumption that the parent who moved should bear the increase. The court weighs the reason for the added expense and the child’s best interest, and it can issue this order whether or not it also changes the possession schedule. ¹⁷

Changing the Possession Schedule

A possession-schedule modification follows the same legal test as any other custody change: material and substantial change plus best interest. Common triggers include a parent’s work schedule change, the child starting school, or a parent’s move that changes the distance between households. If a child 12 or older has expressed a preference to the judge about possession time, that also supports a modification.

What It Costs and How Long It Takes

The $80 filing fee is the floor. In a contested case, attorney’s fees are usually the largest expense. Family law hourly rates in most Texas metropolitan areas run roughly $250 to $400. Total costs range from a few thousand dollars for a simple dispute to $15,000 or more for a complex contested case that goes to trial.

Other costs to plan for: service of process (typically $50 to $150), mediation fees, and, if the court orders a custody evaluation or social study, each party’s share of the evaluator’s fee, which can run several thousand dollars. The court can order one party to contribute to the other’s attorney’s fees and costs as part of temporary orders, so if you’re at a significant financial disadvantage, raise that with your attorney early. ¹³

Building the Evidence

Modifications turn on documentation, not assertions. Before you file, pull together everything that connects the changed circumstances to the child’s well-being. For support changes, that means pay stubs, tax returns, bank statements, and records of job changes. For conservatorship or possession changes, school records, medical records, communications between parents, and records of the child’s current living situation all matter.

If safety is at issue, police reports, protective order records, photographs, text messages, and witness statements are especially important. Courts hear a lot of vague accusations in these cases. The ones that succeed have a paper trail. Keep a dated log of concerning incidents with descriptions and any corroborating evidence; it holds up far better than reconstructed memories.

If your child is 12 or older and wants to speak with the judge about their preference, you or your attorney can request an in-chambers interview, and the court must grant it. The child’s preference won’t decide the case on its own, but it becomes part of the record the judge weighs. ¹²

1
State of Texas. Texas Family Code FAM 156.101 – Grounds for Modification of Order Establishing Conservatorship or Possession and Access
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State of Texas. Texas Family Code FAM 156.102 – Modification of Exclusive Right to Determine Primary Residence of Child Within One Year of Order
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State of Texas. Texas Family Code FAM 102.003 – General Standing to File Suit
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Texas Law Help. Petition to Modify the Parent-Child Relationship
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State of Texas. Texas Family Code FAM 110.002 – Filing Fee
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Texas Law Help. Court Fees and Fee Waivers
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Texas Law Help. Responding to a Modification Case – Section: What Does It Mean to Be Served With Court Papers
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Texas Law Help. I Need to Change a Custody, Visitation, or Support Order
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Texas Law Help. Mediation and Family Violence – Section: What Is Mediation
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State of Texas. Texas Family Code FAM 153.002 – Best Interest of Child
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State of Texas. Texas Family Code FAM 153.134 – Court-Ordered Joint Conservatorship
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State of Texas. Texas Family Code FAM 153.009 – Interview of Child in Chambers
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State of Texas. Texas Family Code FAM 105.001 – Temporary Orders Before Final Order
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State of Texas. Texas Family Code FAM 156.006 – Temporary Orders
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State of Texas. Texas Family Code FAM 154.125 – Application of Guidelines to Net Resources
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Texas Law Help. Geographic Restrictions
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State of Texas. Texas Family Code FAM 156.103 – Increased Expenses