California Child Support Calculator

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California uses an algebraic formula: CS = K[HN - (H%)(TN)], where K is a factor based on both parents combined income and number of children, HN is the high earner net disposable income, H% is the high earner time-share percentage, and TN is combined net disposable income. Time-share percentage directly affects support amount.

California Guidelines

California uses the Income Shares (algebraic formula: CS = K[HN - (H%)(TN)]) model. California uses an algebraic formula: CS = K[HN - (H%)(TN)], where K is a factor based on both parents combined income and number of children, HN is the high earner net disposable income, H% is the high earner time-share percentage, and TN is combined net disposable income. Time-share percentage directly affects support amount.

Disclaimer

This calculator provides estimates only. It is not a substitute for legal advice. Court-ordered amounts may differ based on your specific circumstances.

How California Calculates Support

Model:Income Shares (algebraic formula: CS = K[HN - (H%)(TN)])

Income Basis:net monthly disposable income (both parents)

Formula:California uses an algebraic formula: CS = K[HN - (H%)(TN)], where K is a factor based on both parents combined income and number of children, HN is the high earner net disposable income, H% is the high earner time-share percentage, and TN is combined net disposable income. Time-share percentage directly affects support amount.

What You'll Need

Number Of Children On Order*
Parent A Net Monthly Disposable Income*
Parent B Net Monthly Disposable Income*
Time Share Percentage*
Hardship Deductions

* Required fields — optional items shown in gray

Learn More

How California calculates child support

Official Sources

California Family Code §4050–§4076 (Statewide Uniform Guideline)California Department of Child Support Services