California Child Support Calculator
General information, not legal advice.
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How California sets child support
California sets child support by the guideline method under Cal. Fam. Code 4055. The rule has been in force since September 1, 2024.
- Coverage
- Calculated by the support engine
- Method
- guideline
- Source
- Cal. Fam. Code 4055 (statewide uniform guideline) as amended by SB 343 (Stats. 2023, ch. 193), operative September 1, 2024: formula 4055(a); K-factor table and time factor 4055(b)(3); child multipliers 4055(b)(4); payer 4055(b)(5); low-income adjustment 4055(b)(7)
- In force from
- September 1, 2024
- Rule version
- 2024-09-01
- Inputs it needs
- Parent A net monthly, Parent B net monthly, Children, Timeshare A percent
- Optional inputs
- Low income threshold monthly
Rule details as of 2026-10-25. The calculator above reads the current rule. Where the rule gives no formula, no figure is shown.
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