Sole Custody in New York: What It Means and How to File

Sole custody in New York gives one parent either the exclusive right to make major decisions for a child, the right to have the child live primarily with them, or both. Courts award it under Domestic Relations Law §70 and §240 using a “best interests of the child” standard, with no automatic preference for either parent.¹ The label splits into two pieces that a parent can hold separately, so it helps to know which one you actually want before you file.

Sole Legal Custody: Who Makes the Big Decisions

Sole legal custody gives one parent the exclusive right to make major decisions about the child’s education, medical care, and religious upbringing.² The other parent may be kept informed or asked for input, but the custodial parent has the final say. Under joint legal custody, by contrast, both parents must agree before moving forward on significant choices.

Courts tend to consolidate decision-making with one parent when the two cannot cooperate on important choices, or when one parent’s judgment raises serious concerns. A parent who repeatedly undermines medical treatment or refuses to engage with school decisions gives the court reason to hand the authority to the other parent alone.

Sole Physical Custody: Where the Child Lives

Sole physical custody, sometimes called residential custody, means the child lives with one parent more than 50% of the time.² That parent handles the daily routine, and the law calls them the “custodial parent.” The other is the “noncustodial parent.”

Sole physical custody does not cut the noncustodial parent out. Courts almost always grant visitation, sometimes called parenting time, unless contact would endanger the child. A typical schedule might include alternating weekends, a midweek evening, holidays on rotation, and a stretch of summer. Where safety is a concern, the court can order supervised visitation instead, with visits happening in the presence of a court-approved monitor at a visitation center, a trained social worker, or a family member both sides agree on. Common reasons include a history of domestic violence, untreated substance abuse, or erratic behavior around the child. Supervised visitation is usually temporary, and a parent can petition to move to unsupervised visits after completing court-ordered programs and building a consistent track record.

A common New York arrangement combines sole physical custody for one parent with joint legal custody, so the child has one primary home but both parents share the big decisions. True joint physical custody with a roughly equal split is less common here; courts prioritize stability, and equal-time schedules only tend to work when parents live close, keep conflict low, and can protect the child’s school and social life from the logistics.

How Courts Decide Custody: The Best Interests Standard

Every custody determination in New York turns on the same question: what arrangement serves the best interests of the child? DRL §70 states that neither parent has a presumptive right to custody and directs the court to decide “solely what is for the best interest of the child, and what will best promote its welfare and happiness.”¹ No single factor is automatically decisive.

The factors courts weigh include:

Each parent’s caregiving ability. Who has been providing day-to-day care, and how well? A parent who has been the primary caregiver through the child’s life carries meaningful weight.
Home environment. Safety, stability, and the overall quality of each parent’s living situation.
Parental fitness. Mental and physical health, and general stability. Untreated mental illness or chronic instability makes an uphill argument for sole custody.
Willingness to support the other parent’s relationship with the child. Courts notice when one parent encourages the bond, and they notice when one parent works to undermine it. This can swing close cases.
The child’s preferences. Older children, particularly teenagers, may have their wishes considered, with more weight as the child matures. Preference alone is never decisive.
Stability and continuity. If the child is doing well in their current school, neighborhood, and routine, courts are reluctant to disrupt that.
History of domestic violence, abuse, or neglect. This is where the analysis shifts from weighing to protecting.

Domestic Violence in the Custody Analysis

New York treats domestic violence as a stand-alone consideration the court must address on the record. Under DRL §240, when one parent alleges domestic violence and proves it by a preponderance of the evidence, the court must consider how that violence affects the child’s best interests and must state on the record how it factored into the custody decision.³ The statute makes this mandatory.

The law also protects parents who raise concerns in good faith. If a parent reasonably believes the child is a victim of abuse or neglect and acts lawfully to protect the child, the court cannot restrict custody or visitation based solely on raising the allegation.³ Credible findings of violence often push a case toward sole legal and sole physical custody with the non-abusive parent, with the other parent limited to supervised visitation or, in extreme cases, no contact.

How to File for Sole Custody in New York

Custody cases go to either Family Court or Supreme Court, depending on your situation. Married parents going through a divorce handle custody as part of the divorce in Supreme Court, and the custody order becomes part of the divorce judgment. Parents who are not divorcing (whether unmarried, already divorced, or separated) file a petition in Family Court in the county where the child lives.⁴

Family Court has full jurisdiction over custody and visitation under Family Court Act §651, with the same powers as Supreme Court for these matters.⁵ There is no filing fee for a custody petition in Family Court.⁶ After filing, the petition and summons must be personally served on the other parent, who then gets a chance to respond. If a non-parent files (a grandparent, for example), both parents must be served.

If the child faces immediate danger, you can request temporary emergency relief on the petition itself. A judge reviews the request and decides how to protect the child on a short-term basis while the full case moves forward.⁷ Emergency orders are temporary. A hearing follows, usually within days or weeks, where both parents present their side.

What Happens After You File

The Attorney for the Child

New York requires that children in contested custody proceedings have their own attorney, known as the attorney for the child (formerly called a law guardian). This attorney represents the child, not either parent. In Supreme Court custody cases, the appointment is authorized under Judiciary Law §35, which requires Supreme Court to appoint and compensate counsel for the child the same way Family Court would under Family Court Act §249.⁸

The attorney conducts an independent investigation: interviewing both parents, visiting homes, speaking with teachers or therapists, and meeting with the child. The attorney advocates for the child’s wishes, though for very young children who cannot express a clear preference, the attorney may advocate for what they judge to be in the child’s best interests. Judges pay close attention to that recommendation, and it can tip a close case.

Forensic Custody Evaluations

In contested cases, the court may order a forensic custody evaluation. New York requires these evaluations to be performed by a licensed psychologist, social worker, or psychiatrist.⁹ The evaluator interviews both parents and the child, observes interactions, reviews records, and may administer psychological testing before submitting a report to the court.

These evaluations are expensive. Costs commonly run from several thousand dollars to $15,000 or more, depending on the complexity of the case and the evaluator’s fees. The court decides how those costs are split. Evaluations are not required in every case, but when the facts are sharply disputed or safety concerns are raised, courts rely on them heavily.

Settling Without a Trial

Not every case goes to a full hearing. If both parents agree on custody arrangements, the judge can take testimony from both parties and enter a consent order without a trial.¹⁰ The court still reviews the agreement to confirm it serves the child’s best interests. New York City Family Court also offers free mediation for custody and visitation disputes, with cases referred by the judge or by request from either parent, screened first to make sure mediation is appropriate.¹¹ Cases involving domestic violence may be screened out.

Modifying a Sole Custody Order

A custody order is not necessarily permanent. Either parent can petition to modify it, but the parent asking for a change must show a substantial change in circumstances since the original order was entered. Courts will not revisit a custody decision just because one parent is unhappy with it.

Changes that courts commonly recognize as substantial include a parent’s relocation that disrupts the existing arrangement, a significant deterioration in the custodial parent’s home environment, new evidence of substance abuse or domestic violence, major shifts in the child’s educational or medical needs, or repeated failure to follow the existing order. DRL §70 lets the court “at any time thereafter vacate or modify” a custody order.¹ The best interests standard still applies. Parents with an existing Family Court custody order can use the state’s do-it-yourself program to file a modification petition without an attorney; the process mirrors the original filing, with no fee and personal service on the other parent.⁴

Tax Consequences for the Custodial Parent

Sole physical custody has direct consequences at tax time. Under federal tax law, the custodial parent is the one with whom the child lived for the greater number of nights during the year, and that parent generally claims the child as a dependent.¹² If the child spent an equal number of nights with each parent, the IRS treats the parent with the higher adjusted gross income as the custodial parent.¹³

The custodial parent is eligible for several tax benefits:

The Child Tax Credit, worth up to $2,200 per qualifying child as of 2025, with the amount now indexed to inflation after Congress made the credit permanent. The full credit is available to single filers earning up to $200,000.¹⁴¹⁵
Head of household filing status, available to a custodial parent who is unmarried (or considered unmarried) and pays more than half the cost of maintaining the home. It offers a larger standard deduction and more favorable brackets than filing single.¹³
The Earned Income Credit and the child and dependent care credit, which stay with the custodial parent regardless of any agreement between the parents.

A custodial parent can sign IRS Form 8332 to release the right to claim the child as a dependent to the noncustodial parent. Once released, the noncustodial parent can claim the Child Tax Credit, Additional Child Tax Credit, and credit for other dependents. Head of household filing status, the Earned Income Credit, and the child and dependent care credit cannot be transferred and stay with the custodial parent.¹⁶

Divorce decrees and separation agreements no longer serve as substitutes for Form 8332. Even if a court order says the noncustodial parent gets to claim the child, the custodial parent still needs to sign the form for the IRS to honor it. The release can cover a single year or multiple future years, and the custodial parent can revoke it, though the revocation does not take effect until the tax year after the noncustodial parent receives notice.¹⁶

1
New York State Senate. New York Domestic Relations Law 70 – Habeas Corpus for Child Detained by Parent
2
NY CourtHelp. About Custody
3
New York State Senate. New York Domestic Relations Law 240 – Custody and Child Support; Orders of Protection
4
NY CourtHelp. Filing for Custody
5
YPDcrime. Family Court Act Article 6 Part 3 – Custody
6
NY State Courts. Filing Fees
7
NY State Courts. Custody and Visitation
8
New York State Senate. New York Judiciary Law 35
9
New York State Education Department. Requirements for Forensic Custody Evaluators
10
NY State Courts. Custody and Visitation FAQs
11
NY State Courts. New York City Family Court ADR Programs
12
Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined
13
Internal Revenue Service. Publication 504 – Divorced or Separated Individuals
14
Congress.gov. The Child Tax Credit: How It Works and Who Receives It
15
Internal Revenue Service. Child Tax Credit
16
Internal Revenue Service. Form 8332 – Release/Revocation of Release of Claim to Exemption for Child by Custodial Parent