Professional-grade calculations following California Family Code § 4055. Built for family law attorneys and professionals practicing in California Superior Courts.
California uses a unique formula-based approach established in Family Code § 4055, distinct from the income shares model used in other states.
Child support amount to be paid
Combined total income available for support (based on net income as of Sept 2025)
Net monthly disposable income of the higher-earning parent
Approximate percentage of time the higher-earning parent has the child (timeshare)
Combined total net monthly disposable income of both parents
California's formula considers multiple factors beyond just income
Gross income from all sources minus allowable deductions including federal/state taxes, mandatory union dues, health insurance premiums, and mandatory retirement contributions.
The amount of time each parent spends with the child significantly impacts the calculation. California courts look at actual overnight stays to determine each parent's percentage.
Support obligations increase with additional children, calculated through the guideline formula's K factor adjustments.
Childcare costs, uninsured medical expenses, and health insurance premiums for the child are divided proportionally based on each parent's income.
Additional dependent children from other relationships may affect the calculation under specific circumstances.
California considers all income sources: wages, bonuses, commissions, self-employment, rental income, retirement benefits, and more.
Our calculator uses the same algorithms as California's state-certified guideline calculators, ensuring accurate results that comply with Family Code § 4055 and the latest SB 343 changes.
Automatically generates completed California child support forms ready for court filing. Save hours of manual form-filling with accurate, court-ready documentation.
Built-in California tax calculator automatically computes net disposable income using current state and federal tax rates, FICA withholdings, and allowable deductions.
Precise timeshare calculations with overnight tracking. See exactly how different custody arrangements affect support obligations under California's unique formula.
Handle complex income scenarios including self-employment, variable income, bonuses, and commissions with California-specific business expense deductions.
Generate detailed breakdowns showing every calculation step. Perfect for client consultations, settlement negotiations, and court presentations in California Superior Courts.
Purpose-built for California's unique child support requirements
Forms and calculations formatted specifically for California Superior Court family law divisions across all 58 counties.
Automatic application of California's low-income adjustment provisions for cases below the threshold income levels.
Accurate K-factor calculations using California's updated net income methodology (SB 343), handling both single-child and multiple-child scenarios.
Properly allocates mandatory add-ons including childcare, health insurance, and uninsured medical costs based on proportional income shares.
Join hundreds of California family law attorneys using Juno for accurate, court-ready child support calculations.
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