California Child Support Calculator













Need to calculate child support in California? Use our easy and accurate California Child Support Calculator to estimate payments using state guidelines. This tool helps parents get quick, free estimates based on income and custody percentages. Updated for 2025. Take control through this online resource for accurate numbers.

How to Use This Calculator

  1. Enter each parent’s monthly gross income

  2. Input the number of children

  3. Enter the custody time percentage for Parent 1

  4. Click “Calculate Support” to view an estimated monthly payment

California Child Support Calculator

Why Use a California Child Support Calculator?

California’s child support formula considers both parents’ incomes and parenting time. Our free calculator can help you:

  • Estimate support without going to court

  • Prepare for legal negotiations or mediation

  • Understand your financial responsibilities

  • Save time and reduce uncertainty

You can also check - Indiana Child Support Calculator

How Child Support is Calculated in California

California uses a complex mathematical formula established by law to calculate child support. The formula ensures both parents contribute proportionally to the child’s financial needs based on time-share and income.

Key inputs:

  1. Gross income of both parents

  2. Time-share percentage (custody/overnights)

  3. Health insurance premiums for the child

  4. Mandatory deductions (taxes, union dues, retirement)

  5. Other child or spousal support payments

Parenting Time Makes a Big Difference

California courts consider the percentage of time the child spends with each parent. The more time one parent has, the more support the other may pay.

  • 50/50 custody → shared expenses

  • Sole custody → higher obligation for non-custodial parent

Time-share is calculated based on overnights per year, so be precise when using the calculator.

What Affects California Child Support?

✅ Income

Includes wages, bonuses, self-employment, rental income, unemployment benefits, etc.

✅ Time-Share (Custody)

More overnights = less support obligation.

✅ Mandatory Deductions

Such as taxes, Social Security, health premiums, union dues.

✅ Other Support Obligations

Spousal support or other child support payments are deducted from income.

✅ Child-Related Costs

Add-on expenses (childcare, education, medical) may be shared separately from guideline support.

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FAQ – California Child Support

Q. Does this calculator reflect official CA law?
A. Yes, it’s based on California’s income shares model and gives a close estimate. For court purposes, consult the CA Guideline Child Support Calculator or an attorney.

Q. What if custody is split 50/50?
A. Payments may still be required if there’s a significant income difference between parents.

Q. Can the court deviate from the calculated amount?
A. Yes, judges can adjust support based on hardship, special needs, or other legal exceptions.

Disclaimer: This calculator provides an unofficial estimate based on general California child support guidelines and is for informational purposes only. For a legally binding calculation, consult a California family law attorney or use the official calculator provided by the California Department of Child Support Services.