To file for child support, you apply through your state or county child support enforcement agency or file a petition directly in family court. Federal law requires every state to run a child support program that locates parents, establishes parentage, and sets payment amounts. The process works whether you’re divorced, separated, or were never in a relationship with the other parent, and you don’t need a lawyer to get started.
Agency or Court: Pick Your Path
You have two main ways in, and the right one depends on your situation and budget.
The first is your state or county child support enforcement agency, sometimes called the IV-D agency after the section of federal law that created the program. These offices handle everything from tracking down the other parent to calculating support amounts and enforcing the order once it’s in place. The federal application fee is capped at $25, and many states charge nothing at all.1Office of the Law Revision Counsel. 42 USC 654 – State Plan for Child and Spousal Support If you receive public assistance through Temporary Assistance for Needy Families, Medicaid, or food assistance, a case is typically opened on your behalf automatically as a condition of receiving benefits.
The second is filing a petition directly in family court, on your own or through a private attorney. This route tends to move faster because you aren’t waiting behind the agency’s full caseload, but you’ll pay court filing fees and potentially attorney costs out of pocket. Parents who need help locating the other parent, or who expect to rely on enforcement tools like wage garnishment and tax refund interception later, usually benefit more from the agency path, since those tools are built into the IV-D system.
Who Can File
The parent with primary physical custody is the most common filer, but you don’t have to be a biological parent. Legal guardians, grandparents, and other relatives with court-ordered custody can file against one or both biological parents.
When a family receives TANF benefits, federal law requires the custodial parent to cooperate with child support enforcement. As part of receiving cash assistance, families assign their right to child support payments to the state, which keeps those payments to reimburse itself and the federal government for the benefits paid out. Refusing to cooperate results in at least a 25 percent reduction in benefits, and some states cut off assistance entirely.
Establish Parentage First If You Weren’t Married
If the parents were married when the child was born, the law presumes both spouses are legal parents and you can skip this step. For children born to unmarried parents, establishing legal parentage is mandatory before any support order can be issued.2Office of Child Support Enforcement. Child Support Handbook – Chapter 3 Establishing Fatherhood
The simplest route is a Voluntary Acknowledgment of Paternity, a form available at hospitals right after birth and through vital records offices afterward.2Office of Child Support Enforcement. Child Support Handbook – Chapter 3 Establishing Fatherhood Both parents sign, and it carries the same legal weight as a court order. If the other parent refuses to sign or disputes being the father, you’ll need to file a petition to establish paternity through the court, which usually involves genetic testing. The IV-D agency can help arrange and sometimes cover the cost of DNA testing when you apply through their office.3eCFR. 45 CFR 303.5 – Establishment of Paternity
What to Gather Before You Apply
Having your paperwork ready before you start saves time and prevents the agency or court from sending the case back as incomplete.
- Identifying information for both parents and each child: full legal names, dates of birth, Social Security numbers, and current addresses. If you don’t know the other parent’s Social Security number, provide as much identifying information as you can; the agency has tools to locate people.
- The other parent’s employment details: employer name, address, and pay frequency. Most support orders include immediate income withholding from the paying parent’s wages, so this matters.
- Income documentation: recent pay stubs, W-2 forms from the most recent tax year, and full tax returns with all schedules. Include documentation of every income source: bonuses, commissions, rental income, and side work.
- Expense records: health insurance premiums you pay for the child, childcare costs, and any extraordinary medical expenses.
- Existing court orders: copies of any divorce decree, custody agreement, or prior support orders from other cases.
If a Parent Is Self-Employed
Self-employment income is where calculations get contentious. A W-2 employee’s income is straightforward, but a self-employed parent’s reported taxable income often looks much lower than what they actually bring in. Courts know this.
If either parent is self-employed, expect to provide two to three years of personal and business tax returns, bank statements for all accounts, profit and loss statements, and any 1099 forms. Courts look at gross business receipts minus legitimate operating expenses, but they don’t automatically accept every deduction the IRS allows. Judges routinely add back expenses that look more personal than business-related, like vehicle costs that blend personal and work use, entertainment spending, and depreciation that reduces taxable income on paper without affecting actual cash flow. If a self-employed parent fails to provide adequate financial records, the court can impute income based on earning capacity, work history, or industry averages.
How to Submit the Application
Most state child support agencies offer online applications through their website, and some let you complete the entire process electronically. You can also file in person at your local child support office or county courthouse, which has the advantage of someone reviewing your paperwork on the spot. Mailing your application via certified mail with a return receipt creates a paper trail if you ever need proof of your filing date.
Federal law caps the initial application fee for IV-D services at $25, and the agency can waive or reduce it based on your ability to pay. Many states charge no upfront fee at all. A separate $35 annual service fee kicks in only after the agency has collected at least $550 in support on your behalf, and only if you’ve never received TANF benefits.1Office of the Law Revision Counsel. 42 USC 654 – State Plan for Child and Spousal Support That fee is deducted from collected support rather than billed to you separately. Filing directly in family court instead means filing fees that vary by jurisdiction and tend to be higher, though courts can waive them for people who show financial hardship.
After the agency or court accepts your filing, the other parent must be formally notified through a process called service of process. A sheriff’s deputy, process server, or sometimes certified mail delivers a summons and copy of the petition. The case cannot move forward until the other parent has been properly served and given time to respond.
What Happens After You File
Federal regulations require the IV-D agency to establish a support order or at least complete service of process within 90 days of locating the other parent.4eCFR. 45 CFR 303.4 – Establishment of Support Obligations In practice, straightforward cases where both parents cooperate can wrap up faster, while contested paternity or hard-to-find parents can push the timeline well beyond that window.
Agency staff verify the income information you submitted by cross-referencing state employment records and tax databases. Both parents then attend either an administrative conference (run by a caseworker or hearing officer) or a judicial hearing before a judge, depending on your state’s process. During the hearing, both sides can challenge the other’s financial disclosures or raise issues about custody time and expenses.
How the Amount Gets Calculated
Most states use what’s called the income shares model, which works from the idea that the child should receive the same share of parental income they’d get if both parents lived together. Both parents’ incomes are combined, a table determines the total child support obligation based on that combined figure and the number of children, and each parent’s share is proportional to their percentage of the total income. A handful of states use a simpler percentage-of-income model that looks mainly at the paying parent’s earnings.
The calculation adjusts for factors like health insurance premiums paid for the child, childcare costs, and the amount of overnight time each parent has. The guidelines produce a presumptive amount that the court follows unless someone demonstrates that deviating from it would be appropriate given unusual circumstances.
Automatic Income Withholding and Medical Support
Federal law requires that virtually all child support orders include immediate income withholding, meaning the payment comes straight out of the paying parent’s paycheck before they ever see it.5Office of the Law Revision Counsel. 42 USC 666 – Requirement of Statutorily Prescribed Procedures to Improve Effectiveness of Child Support Enforcement The employer deducts the amount each pay period and sends it to the state disbursement unit, which forwards it to the custodial parent.6Administration for Children and Families. Processing an Income Withholding Order or Notice Withholding applies to wages, salaries, commissions, bonuses, workers’ compensation, disability payments, pensions, and retirement benefits.7Administration for Children and Families. Income Withholding
Every child support order must also include a provision for medical support.5Office of the Law Revision Counsel. 42 USC 666 – Requirement of Statutorily Prescribed Procedures to Improve Effectiveness of Child Support Enforcement This typically means one or both parents must provide health insurance for the child. If insurance is available at a reasonable cost through a parent’s employer, the court usually orders that parent to enroll the child. When employer coverage isn’t available or is unreasonably expensive, the court may order a cash contribution toward coverage obtained by the other parent. Parents also commonly share uninsured medical costs like copays, prescriptions, and dental work.
If the Other Parent Lives in Another State
You don’t need to travel to the other parent’s state to file. Every state has adopted the Uniform Interstate Family Support Act, which creates a framework for establishing and enforcing support orders across state lines. File your application with your local child support agency or court, and they transmit the case to the other parent’s state for processing.
The state that issues the original support order keeps exclusive authority over it as long as either parent or the child still lives there. If everyone has moved away from the original state, a new state can take over jurisdiction. This prevents parents from shopping around for a more favorable calculation by moving.