CA Child Support Calculator

How many children?

Support amounts scale by a statutory multiplier per § 4055(b)(4).

1 child

Multiplier: 1.0×

Custody time-share

Approximate % of time you (Parent 1) have primary physical responsibility.

30% You

70% Other Parent

0% — Other parent full custody 100% — You full custody

Monthly gross income

Total income from all sources before taxes (§ 4058). Enter 0 if unemployed.

Parent 1 — You

$ / mo

Parent 2 — Other

$ / mo

Monthly deductions optional

§ 4059 allowable deductions: union dues, health insurance premiums, mandatory retirement contributions. Enter 0 if none.

Parent 1 deductions

$ / mo

Parent 2 deductions

$ / mo

Estimated Monthly Support

Factor	Description	Value

CS = K × [HN − (H% × TN)] · CA Family Code § 4055(a)

§ 4065 — Stipulated Agreements

Parents may agree to an amount different from the guideline — including below it — if both declare under penalty of perjury:

They are fully informed of their rights regarding child support
The agreement is not the product of coercion or duress
The agreement is in the best interests of the children
The needs of the children will be adequately met

The court will not approve a below-guideline stipulation if the children receive CalWORKs assistance or a public assistance application is pending.