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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.

Children & Custody

Income

Adjustments

Results

Children & Custody

Number of Children

Higher-Earner's Time-Share

Percentage of time children spend with the higher-earning parent (H%). The guideline formula uses this to adjust support.

Double-click slider to set to 50%

Time-Share Impact

The higher earner's time-share percentage directly affects the support formula. Less time with children generally means higher support obligations.

50% time-share may result in $0 support if incomes are similar

California Guidelines

Maryland uses the Income Shares model under FL 12-204. Both parents' incomes determine the basic obligation from a statutory schedule.

Need Legal Help?

A family law attorney can review your situation and explain how these guidelines apply to your case.

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

Need Help?

A family lawyer can help you apply these guidelines to your specific situation.

Official Sources

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