California Child Support Calculator

California uses the guideline formula model. California uses a statewide uniform algebraic guideline formula under Family Code Section 4055: CS = K[HN - (H%)(TN)]. CS is the child support amount; K is the allocation factor based on combined income and number of children; HN is the high earner's net monthly disposable income; H% is the percentage of custodial time the high earner has; TN is the total net monthly disposable income of both parents. The formula accounts for both parents' incomes, custodial time-sharing, and tax impacts. A low-income adjustment applies when the obligor earns less than full-time minimum wage (FC 4055(b)(7)). Courts have limited discretion to deviate from the guideline amount. The formula is typically calculated using approved software such as DissoMaster or XSpouse.

Gross income from all sources is typically used, including wages, salary, bonuses, commissions, self-employment income, rental income, investment income, Social Security benefits, unemployment benefits, and disability benefits. Courts may also impute income if a parent is voluntarily unemployed or underemployed.

Child support in California generally continues until the child turns 18, or through high school graduation if the child is still in school. Some orders extend to age 19 or 21 depending on the state and circumstances (college support, special needs).

Yes, child support orders in California can be modified when there is a substantial change in circumstances. Common reasons include significant income changes (job loss, promotion), changes in custody arrangement, changes in the child's needs, or changes in healthcare costs.

California has enforcement mechanisms including wage garnishment, tax refund interception, license suspension (driver's and professional), bank account levies, contempt of court charges, and reporting to credit bureaus. Failure to pay can result in fines and jail time.