Our calculator uses common state guideline formulas — mainly a percentage-of-income model or income-shares method — to approximate monthly child support. It considers both parents' incomes, number of children, and the percentage of time each parent spends with the child. Select your state to see a relevant estimate.

No. This tool provides an educational estimate based on typical state guidelines. It is not a legal determination. For official amounts, consult a family law attorney or your state's child support agency.

We have preset rates for California, Texas, New York, Florida, Illinois, and Pennsylvania. For other states, we apply a general averaged guideline. Actual state calculators often use more complex tables and deductions.

Main factors include each parent's income, number of children, parenting time split, health insurance costs, childcare expenses, and sometimes other dependents. This calculator simplifies using income and time to give you a baseline.

Use your gross monthly income before taxes. If your income varies, estimate an average over the last 12 months. For precise calculations, consult tax returns or a professional.

You must enter an estimate to get a result. If truly unknown, you might use your state's median income or a figure based on the other parent's earning capacity. The tool requires both incomes for a balanced calculation.

Yes. The slider lets you indicate the percentage of time the child spends with you. Many states adjust support when the non-custodial parent has significant parenting time (often above 20%). This tool applies a sliding adjustment to reflect that.

Typically, support orders remain in effect until a child turns 18 or graduates high school, but amounts can be modified if circumstances change (income shift, additional children, etc.). Use this calculator to re‑evaluate when conditions change.

Most states review their child support guidelines every four years, as required by federal law. Our calculator uses typical current percentages, but always check your state's official website for the latest numbers.

Contact your local child support office or a legal aid organization. You may be able to request a modification if your income has decreased or your circumstances have changed. This estimator helps you understand potential obligations before court.