California Child Support
The formula lives in the statute. So it's computed here — as written.
CS = K[HN − (H%)(TN)]: both parents' net disposable incomes, the high earner's share of parenting time, the statutory K brackets, and fixed multipliers for multiple children — with the statute's own worked example reproduced by this engine. Guideline support is presumptively correct; deviation takes findings; the court's calculation controls.
Statute verified at render: the stored official text of § 4055 carries the formula string and the first K bracket — this calculator computes against that verified text (SB343-operative-2024-09-01).
The inputs, organized (§ 4059 and friends)
Each parent's net monthly disposable income
Annual gross minus the § 4059 deductions (income tax by actual filing status, FICA/mandatory retirement, health premiums, court-ordered support actually paid, and the other listed items), divided to monthly.
Cal. Fam. Code § 4059
H% — the high earner's approximate time with the children
The approximate percentage of time the HIGH earner has primary physical responsibility for the children; different arrangements per child average per § 4055(b)(1)(D).
Cal. Fam. Code § 4055
Children of the order
The § 4055(b)(4) table multiplies the one-child amount through 10 children.
Cal. Fam. Code § 4055
Mandatory and discretionary add-ons
Child-care for employment/training and uninsured health costs are mandatory additions; education/special-needs/travel are discretionary — tracked separately from the base figure.
Cal. Fam. Code § 4062
Hardship deductions
Claimed hardships (§§ 4070-4073) adjust net income only on documented findings.
Cal. Fam. Code § 4070
California courts commonly run certified guideline calculators (DissoMaster-class tools) on these same statutory inputs; this engine computes the § 4055 formula exactly as the statute states it, shows its work, and is legal information — the court's own calculation controls.
Authority locked — retrieved from the hash-pinned corpus
Net disposable income is the real work. § 4059 defines the deductions (actual tax by filing status, mandatory dues and retirement, health premiums, support actually paid, and the rest) — organize those inputs honestly before relying on any figure. Courts commonly run certified calculator tools on these same inputs; add-ons (child care, uninsured health) ride on top under § 4062. Legal information, not legal advice.