Stonepath Labs

California Child Support Estimator

⚠ This is NOT a California Approved Guideline Support Calculator. Results are rough estimates only — not court-approved, not Judicial Council certified, and not a substitute for legal advice. For the fully approved guideline calculator, create a free account.

All amounts are monthly unless otherwise stated.

Base Support
(Ostler-Smith Report on Page 2)

📋Case Information

Timeshare

20%
80%

💰Income

Manual mode: using party-supplied net disposable income. Change in Settings.
Father
Mother
Father
Mother

🧮Tax Calculation

Enter income information to see the calculation breakdown.

📊Post-Support (before add-ons) Cash Flow

Results will appear after calculation.

Stonepath Support Estimator 0.1
Not a Certified Guideline Calculation. Create an actual certified guideline calculation at stonepath.app

Settings

Manual Net Income Mode
Always on in the free estimator. Detailed gross income & tax inputs are available in Pro.
Show Cents
Display monetary values with cents. Off = rounded whole-dollar display.
Spousal Support Tax Treatment
Tax-adjusted deductibility calculations are available in Pro.
Print: Autohide Empty Cards
PDF printing is available in Pro.

Gross Wage Converter

Convert periodic or YTD earnings to monthly gross wages.

Periodic Amount to Monthly
YTD to Monthly Extrapolation

County Guideline Mapping

Grouped by guideline calculation family (per each county's local rules as of 02/17/2026).

Guideline Calculation Counties
Santa Clara Amador, Butte, Kern, Lake, Los Angeles, Madera (implied), Monterey, Napa, Orange (widely reported), Riverside (widely reported), Sacramento, San Bernardino (widely reported), San Joaquin, San Mateo (implied), Santa Barbara (implied), Shasta, Solano, Trinity, Ventura, Yolo
Alameda Contra Costa, El Dorado, Imperial, Nevada, Placer, Santa Cruz, Sonoma, Stanislaus
Marin Kings (hybrid approach that often equals Marin), Tulare (uses Kings)
None
(Local rules silent) 		Alpine, Calaveras, Colusa, Del Norte, Fresno, Glenn, Inyo, Lassen, Mariposa, Mendocino, Merced, Modoc, Mono, Plumas, San Francisco, San Luis Obispo, Sierra, Siskiyou, Sutter, Tehama, Toulumne, Yuba
No CS Adjustment: Ignores child support and calculates temporary guideline spousal support as if the parties had no children.
Full CS Adjustment: Reduces the payor's net disposable income by 100% of child support paid before applying the temporary guideline spousal support formula.
Target Net Spendable Percent: Fine-tunes spousal support to reach a target post-support net disposable ratio.
Target Net Spendable Amount: Fine-tunes spousal support to reach a target post-support net disposable cash-flow amount.
User Input: Lets the user enter the spousal support amount directly.

Existing Spousal Support Breakdown

Break out deductible categories to drive tax treatment.

Type Paid by this party Paid by this party's new spouse
Fed + State deductible support
State only deductible support
Not deductible support
Monthly total: $0

Hardship Helper (FC §4071)

Enter children count and percentage factor.

Timeshare Schedule Helper

Build Father's timeshare from a custody schedule. Timeshare is based on overnights per year.

Regular Schedule (School Year)
Regular schedule overnights: 52 / year
Total annual overnights: 52
Timeshare percentage: 14%