Where to file and who handles your case
You file for child support through your state's child support enforcement agency, not through a private lawyer or the court directly. Every state has one — it may be called the Department of Child Support Services, the Office of Child Support Enforcement, or something similar. You can find yours by searching "[your state] child support enforcement" or by calling 211.
When you file, the agency assigns a caseworker to your case. That caseworker locates the other parent, establishes paternity if needed, calculates support based on your state's guidelines, and enforces the order if the other parent stops paying. You do not need to hire an attorney to use this service — it is free.
If you are already in a custody or divorce case, you can also ask the judge to set child support as part of that case. But the state agency still handles collection and enforcement after the order is signed.
Key Takeaways
- File through your state's child support enforcement agency, which is free and does not require a lawyer.
- You will need the other parent's full name, date of birth, and last known address or employer to start the process.
- The agency will locate the other parent, establish paternity if unmarried, and calculate support based on your state's income-sharing formula.
- Processing takes two to six months on average, but can be faster if the other parent cooperates or slower if they cannot be located.
- Once an order is in place, the agency collects payments through wage withholding, tax intercepts, or bank levies.
Documents you need before you file
Gather these items before you contact the agency. Having them ready speeds up the intake process and reduces back-and-forth.
About the other parent: Full legal name, date of birth, Social Security number (if you have it), last known address, current or most recent employer name and address, and phone number if you have it. If you do not know some of this, the agency can search for it, but providing what you know moves things faster.
About your child: Full legal name, date of birth, and Social Security number. If there are multiple children, list each one.
About you: Your full legal name, date of birth, Social Security number, current address, phone number, and email. Bring a photo ID.
Income documentation: Recent pay stubs (last two months), tax returns (last two years), and a list of any other income — self-employment, disability, unemployment, child support from another child's other parent. The agency uses this to calculate how much the other parent should pay.
Custody documentation: If you have a custody order, bring a copy. If custody has never been established, the agency can handle that as part of the child support case.
The intake appointment and what happens next
Call your state agency or visit their website to schedule an intake appointment. Some states allow you to file online; others require an in-person or phone appointment. Ask which applies to you.
At intake, you will sign forms that authorize the agency to act on your behalf. The main form is usually called an Application for Child Support Services or similar. You will also sign a form authorizing the agency to access the other parent's income records, tax returns, and employment information.
After intake, the agency's next step is location. If you provided the other parent's employer or address, the agency contacts them directly. If you do not know where they are, the agency searches using Social Security records, employment databases, and court records. This step alone can take one to three months.
Once located, the agency sends the other parent a notice that child support has been filed and explains their rights. The other parent can respond, dispute the amount, or ignore it. If they ignore it, the agency moves to establish an order without their input.
Paternity establishment if you were not married
If you and the other parent were never married, the agency must establish paternity — a legal finding that they are the child's biological parent — before child support can be ordered. This is a separate step from calculating support.
The easiest path is if the other parent signs a Voluntary Acknowledgment of Paternity. The agency sends this form to them; if they sign and return it, paternity is established without a court hearing. This usually takes two to four weeks.
If the other parent refuses to sign or does not respond, the agency files a case in family court. The court may order a DNA test. Once the test confirms paternity, the judge signs an order establishing it. This route takes longer — usually two to four months — but the result is the same.
How child support amounts are calculated
Every state uses a child support guideline — a formula that calculates support based on both parents' income, the number of children, and custody arrangement. The formula varies by state, but most use an income-shares model: both parents' incomes are added together, a percentage is set aside for child support, and each parent pays their share based on their percentage of the total income.
The agency gathers income information from both parents' tax returns, pay stubs, and employment records. If the other parent's income is unknown or they refuse to provide it, the judge can impute income — assign an amount based on their work history or the state's average wage for their job type.
The calculated amount is the base support obligation. The judge may adjust it up or down for reasons like high childcare costs, health insurance, overnight custody time with the other parent, or other children the other parent supports. The final order is what the other parent must pay each month.
Support amounts vary widely by state and income. A parent earning $40,000 per year might pay $300 to $500 per month for one child in one state and $400 to $600 in another. Ask your caseworker what the estimated amount will be based on the other parent's reported income.
Court hearing and the final order
If the other parent contests the amount or paternity, or if the agency cannot locate them, the case goes to family court. You will receive a notice of hearing with a date, time, and location. Bring your income documents and any evidence of the other parent's income.
At the hearing, the judge reviews both parents' income, the guideline calculation, and any reasons to adjust the amount. You can testify about your expenses, the child's needs, and the other parent's income if you have evidence. The other parent can do the same. The judge then signs a Child Support Order setting the monthly amount.
If the other parent does not show up, the judge can sign an order by default — meaning the amount you requested is granted. If you do not show up, the case may be dismissed.
The entire process from filing to a signed order typically takes two to six months, depending on whether the other parent cooperates and whether the case requires a hearing.
How payments are collected and enforced
Once the order is signed, the agency sets up collection. The most common method is wage withholding: the agency sends the order to the other parent's employer, and the employer deducts child support from their paycheck before they receive it. This is automatic and requires no action from you.
If the other parent is self-employed or unemployed, the agency may use other methods: intercepting their tax refunds, placing a lien on their property, suspending their driver's license, or garnishing their bank account. The agency chooses the method based on what works for your case.
Payments go to the state's collection unit first, then to you. There is usually a small delay — one to two weeks — between when the other parent pays and when you receive it. Some states offer a prepaid debit card; others mail checks or deposit directly to your bank account.
If the other parent falls behind, the agency sends them a notice and may file a contempt case in court. Contempt can result in fines or jail time, though jail is usually a last resort after other enforcement methods have failed.
Modifying or ending child support
Child support orders can be changed if circumstances change significantly. Common reasons include a job loss, a major income increase, a change in custody, or a new child born to the other parent. You or the other parent can request a modification through the agency.
The agency reviews the request and may recalculate support based on current income. If the new amount differs by a certain percentage — usually 10 percent or more — the agency can file to modify the order without a court hearing in some states. In others, a judge must approve the change.
Child support ends when the child turns 18 in most states, or when they graduate high school if that is later. Some states extend it to age 19 or 20 if the child is still in high school. Support also ends if the child is adopted by someone other than the paying parent, or if the child's custody changes to the paying parent.
Frequently Asked Questions
What if I do not know the other parent's Social Security number or address?
The agency can locate them using their name, date of birth, and last known employer or address. The search takes longer — usually one to three months — but the agency has access to employment databases, tax records, and other sources that you do not. Provide whatever information you have.
Do I need a lawyer to file for child support?
No. The state agency handles the case for free and does not require you to hire an attorney. However, if the other parent hires a lawyer or if the case becomes complicated, you may choose to hire one for your own representation. Some legal aid organizations offer free or low-cost help if your income is below a certain threshold.
What if the other parent lives in a different state?
Your state's agency can still pursue the case under the Uniform Interstate Family Support Act (UIFSA). They work with the other state's agency to locate the parent, establish paternity if needed, and set up collection. The process takes longer — usually four to eight months — but the outcome is the same.
Can I file for child support if I am receiving TANF or SNAP?
Yes, and in some cases you must. If you receive Temporary Assistance for Needy Families (TANF), you are required to cooperate with child support enforcement as a condition of receiving benefits. The state keeps a portion of collected support to offset what they paid you; you receive the rest. Ask your caseworker what percentage you will keep.
How long does it take to receive the first payment?
After the order is signed, it usually takes two to four weeks for wage withholding to begin if the other parent is employed. If they are self-employed or unemployed, collection methods take longer — sometimes two to three months. Ask your caseworker for a timeline based on the other parent's employment status.