What California child support actually covers and who decides the amount

In California, child support is a court order requiring one parent to pay the other parent money for the care of their children. The paying parent is called the obligor; the receiving parent is called the obligee. The court does not decide this based on what either parent thinks is fair — it uses a specific formula written into California Family Code Section 4055.

The formula takes the gross income of both parents, subtracts certain deductions (like taxes and existing child support orders), and applies a percentage based on how much time each parent spends with the children. The court also considers health insurance costs, childcare expenses, and special needs. The result is a monthly payment amount, usually due on the first of each month.

Child support covers food, housing, clothing, education, and medical care. It does not cover college tuition, extracurricular activities, or summer camps unless the parents agree or the court orders it separately. The order stays in place until the child turns 18, graduates high school (whichever is later), or becomes emancipated.

Key Takeaways

  • California uses an income-shares formula that considers both parents' gross income, custody time, and work-related childcare costs to calculate the monthly payment.
  • The court can order support even if parents were never married, and either parent can request a modification if income or custody changes significantly.
  • The Department of Child Support Services can enforce orders, intercept tax refunds, and suspend licenses if payments fall behind.
  • Child support orders typically end when the child turns 18 and graduates high school, or at age 19 if still in high school.
  • Both parents must disclose their income and expenses honestly; hiding income or misrepresenting custody time can result in contempt charges.

How the income-shares formula calculates the payment amount

California starts with gross monthly income for each parent. This includes wages, self-employment income, rental income, Social Security, unemployment benefits, and some types of disability payments. It does not include means-tested benefits like CalFresh or CalWORKs.

From gross income, the court subtracts mandatory deductions: federal and state income tax, Social Security tax, health insurance premiums for the children, and work-related childcare costs. The result is each parent's net disposable income.

The court then calculates a combined parental income and applies a percentage based on the number of children. For one child, the percentage is roughly 20 percent of combined income; for two children, roughly 32 percent; for three, roughly 40 percent. These percentages are guidelines, not absolute rules — the court can adjust them if the formula produces an unjust result.

Each parent's share of the total support obligation is based on their percentage of combined income. If one parent earns 60 percent of the combined income and the other earns 40 percent, the higher earner pays 60 percent of the total obligation. The court also factors in how much time each child spends with each parent; more custody time can lower the paying parent's obligation.

Who can request a child support order and how to start one

Either parent can request child support, regardless of whether they were married. If you are the parent seeking support, you can file through the Department of Child Support Services (DCSS) for free, or you can hire a family law attorney and file directly with the court.

To start an order through DCSS, you file an application at your county child support office. You will need the other parent's name, date of birth, Social Security number (if you have it), current address, and employer information. DCSS will locate the other parent, serve them with court papers, and represent the state's interest in establishing support — not your interest specifically, but the state's interest in reducing public assistance costs.

If you file directly with the court, you complete a Petition to Establish Parental Obligation (or a similar form depending on your county) and serve the other parent according to court rules. You will need to provide your income documents (pay stubs, tax returns, profit-and-loss statements) and information about custody arrangements.

The other parent has 30 days to respond. If they do not respond, the court may enter a default order based on your request. If they do respond, the case may go to mediation, a hearing before a judge, or settlement negotiations.

What documents you need and what the court hearing looks like

Before a hearing, you must file a Declaration Under Penalty of Perjury describing your income, expenses, custody schedule, and any special circumstances. You also need to bring or file:

  • Recent pay stubs (usually the last two months)
  • Last two years of tax returns
  • Profit-and-loss statements if self-employed
  • Proof of health insurance costs
  • Childcare invoices or receipts
  • A copy of any existing custody order or agreement
  • Documentation of the other parent's income if you have it

At the hearing, a judge or court-appointed referee hears testimony from both parents about income, custody time, and any special needs. You do not need a lawyer, but having one is common. The judge applies the formula, considers any arguments for deviation, and issues a written order.

The order specifies the monthly payment amount, the due date, the payment method (usually wage garnishment), and whether either parent owes retroactive support (support for months before the order was issued). The order also addresses health insurance, who claims the children as tax dependents, and how the order will be enforced.

How payments are collected and what happens if someone does not pay

Most child support orders include wage garnishment, meaning the paying parent's employer automatically deducts the payment from their paycheck and sends it to the court or DCSS. This is the most reliable collection method.

If the paying parent is self-employed or does not have stable employment, the court may order direct payment to the obligee, or payments to DCSS, which then distributes them. Some orders allow the parents to arrange their own payment method if both agree in writing.

If payments fall behind, DCSS or the obligee can take enforcement action: intercepting state and federal tax refunds, placing a lien on property, suspending a driver's license or professional license, or filing a contempt motion. A contempt motion can result in jail time if the court finds the obligor has the ability to pay but willfully refuses.

If the obligor loses their job or income drops significantly, they can request a modification. The court will not retroactively forgive unpaid support, but it can reduce future payments if the income change is substantial and long-term.

Modifying or ending a child support order

Either parent can request a modification if there has been a material change in circumstances. This usually means a change in income of 10 percent or more, a significant change in custody time, or a change in health insurance or childcare costs.

To modify an order, you file a Request for Modification of Support Order with the court or through DCSS. You must provide updated income documents and explain what has changed. The other parent has the right to respond and present their own evidence.

The court will recalculate support using the current income and circumstances. If the new amount differs from the current order by more than $50 per month (or 10 percent, whichever is greater), the court will issue a new order. If the change is smaller, the court may decline to modify.

Child support ends automatically when the child turns 18 and has graduated high school, or at age 19 if still in high school. If a child is disabled and unable to support themselves, either parent can request that support continue beyond age 18. The obligor can also request that support end if the obligee's income increases substantially or if custody changes.

What happens if parents agree on a different amount

Parents can agree to a child support amount different from what the formula produces, but the court must approve it. The agreement must be in writing and signed by both parents, usually with the help of lawyers or a mediator.

When you present an agreed-upon amount to the court, you must also file a declaration explaining why the amount is in the children's best interest. The court will review it to make sure neither parent is being coerced and that the amount is not so low that it would harm the children.

If the agreed amount is close to the formula amount, the court usually approves it quickly. If it is significantly lower, the court may ask questions or require a hearing. The court cannot be forced to approve an agreement it believes is unfair to the children, even if both parents want it.

Frequently Asked Questions

Can I get child support if the other parent is unemployed or hiding income?

Yes. The court can assign income to an unemployed parent based on their earning capacity — what they could earn given their age, education, and work history. If you believe the other parent is hiding income, you can request discovery (formal requests for financial documents) or hire an investigator. The court can also order the other parent to produce tax returns and bank statements.

Does child support change if I get custody of the children?

Yes. If custody changes, the support obligation recalculates based on the new custody schedule. If you become the primary custodian, the other parent's obligation usually increases. You can request a modification as soon as the custody change is formalized in court.

What if the other parent lives out of state?

California can still enforce an order against an out-of-state parent through the Uniform Interstate Family Support Act (UIFSA). DCSS can work with the other state's child support agency to locate the parent, establish an order, and collect payments. The process takes longer but is still available.

Can I stop paying child support if I lose my job?

You must request a modification; you cannot simply stop paying. If you stop without a court order, arrears (back payments) will accumulate and enforcement actions can follow. File a modification request as soon as you lose income, and the court may reduce or suspend payments while you are unemployed, depending on the circumstances.

Does child support cover college tuition?

Not automatically. California child support ends when the child graduates high school or turns 19, whichever is later. College costs are not included unless the parents agree in writing or the court orders it as part of a separate agreement. Some parents negotiate college contributions outside of the formal child support order.