Child Support Calculation Worksheet
IMPORTANT: THIS IS A PREPARATION GUIDE — NOT THE OFFICIAL COURT WORKSHEET
California requires the use of official form FL-150 (Income and Expense Declaration) or FL-155 (Financial Statement — Simplified) for child support proceedings.
This template provides the substantive content and calculation methodology to help you
prepare — but you must transfer your figures to the official worksheet before filing.
The official forms are available at https://selfhelp.courts.ca.gov/Child-support-forms.
Do not file this document directly with the court.
CHILD SUPPORT CALCULATION WORKSHEET
State of California -- Statewide Uniform Guideline
Cal. Fam. Code SS 4050-4076
Table of Contents
- Case Information
- Identification of Children
- Gross Income Determination
- Deductions from Gross Income
- Net Monthly Disposable Income
- Guideline Formula Calculation
- Additional Child Support (Add-Ons)
- Deviation Factors
- Duration and Modification
- Certification and Signatures
- Sources and References
1. Case Information
| Field | Entry |
|---|---|
| Court Name | [________________________________] |
| Case Number | [________________________________] |
| Petitioner (Parent 1) | [________________________________] |
| Respondent (Parent 2) | [________________________________] |
| Date of Worksheet | [__/__/____] |
| Prepared By | [________________________________] |
2. Identification of Children
| # | Full Legal Name | Date of Birth | Age | Currently Residing With |
|---|---|---|---|---|
| 1 | [________________________________] | [__/__/____] | [____] | [________________________________] |
| 2 | [________________________________] | [__/__/____] | [____] | [________________________________] |
| 3 | [________________________________] | [__/__/____] | [____] | [________________________________] |
| 4 | [________________________________] | [__/__/____] | [____] | [________________________________] |
Total Number of Children Subject to This Order: [____]
3. Gross Income Determination
3A. Monthly Gross Income
| Income Source | Parent 1 ($) | Parent 2 ($) |
|---|---|---|
| Wages, Salary, Tips | [________] | [________] |
| Commissions / Bonuses | [________] | [________] |
| Overtime | [________] | [________] |
| Self-Employment Income (receipts minus operating expenses) | [________] | [________] |
| Unemployment / Disability Benefits | [________] | [________] |
| Workers' Compensation | [________] | [________] |
| Social Security Benefits | [________] | [________] |
| Pensions / Retirement | [________] | [________] |
| Dividends / Interest | [________] | [________] |
| Rental Income | [________] | [________] |
| Spousal Support Received | [________] | [________] |
| Trust Income | [________] | [________] |
| Annuity Payments | [________] | [________] |
| Other Income: [________________] | [________] | [________] |
| TOTAL MONTHLY GROSS INCOME | [________] | [________] |
3B. Imputed Income (If Applicable)
☐ The court has found Parent 1 voluntarily unemployed/underemployed -- Imputed income: $[________]/month
☐ The court has found Parent 2 voluntarily unemployed/underemployed -- Imputed income: $[________]/month
4. Deductions from Gross Income
4A. Mandatory Deductions
| Deduction | Parent 1 ($) | Parent 2 ($) |
|---|---|---|
| State Income Tax | [________] | [________] |
| Federal Income Tax | [________] | [________] |
| FICA (Social Security / Medicare) | [________] | [________] |
| State Disability Insurance (SDI) | [________] | [________] |
| Mandatory Union Dues | [________] | [________] |
| Mandatory Retirement Contributions (condition of employment) | [________] | [________] |
| Health Insurance Premiums (parent only) | [________] | [________] |
| Health Insurance Premiums (children of this order) | [________] | [________] |
| Court-Ordered Support Paid to Non-Parties | [________] | [________] |
| Job-Related Expenses (per Fam. Code S 4059(d)) | [________] | [________] |
| TOTAL MANDATORY DEDUCTIONS | [________] | [________] |
4B. Hardship Deductions (Fam. Code SS 4070-4073)
| Hardship Item | Parent 1 ($) | Parent 2 ($) |
|---|---|---|
| Extraordinary Health Expenses | [________] | [________] |
| Uninsured Catastrophic Losses | [________] | [________] |
| Minimum Basic Living Expenses of Minor Children from Other Relationships | [________] | [________] |
| TOTAL HARDSHIP DEDUCTIONS | [________] | [________] |
5. Net Monthly Disposable Income
| Calculation | Parent 1 ($) | Parent 2 ($) |
|---|---|---|
| Total Monthly Gross Income (from 3A) | [________] | [________] |
| Less: Total Mandatory Deductions (from 4A) | ([________]) | ([________]) |
| Less: Total Hardship Deductions (from 4B) | ([________]) | ([________]) |
| NET MONTHLY DISPOSABLE INCOME | [________] | [________] |
TN (Total Net Monthly Disposable Income of Both Parents): $[________]
HN (High Earner's Net Monthly Disposable Income): $[________]
6. Guideline Formula Calculation
6A. Time-Share Percentage
| Parent | Approximate % of Time with Children |
|---|---|
| Parent 1 | [________]% |
| Parent 2 | [________]% |
H% (High Earner's Time-Share Percentage): [________]%
6B. K Factor Determination
Number of Children: [____]
| Number of Children | K Factor (Total Net Disposable Income Allocated) |
|---|---|
| 1 child | One child plus K adjustments per S 4055(b)(3) |
| 2 children | Two children plus K adjustments per S 4055(b)(4) |
| 3+ children | Three or more children per S 4055(b)(5) |
K Value Used: [________]
6C. Guideline Amount
CS = K [ HN - (H%)(TN) ]
CS = [________] x [ $[________] - ([________]% x $[________]) ]
CS = $[________] per month
6D. Low-Income Adjustment (Fam. Code S 4057.5)
☐ Not applicable
☐ Applicable -- The obligor's net disposable income is below the low-income threshold
Adjusted guideline amount after low-income adjustment: $[________]/month
7. Additional Child Support (Add-Ons)
| Add-On Expense | Monthly Cost ($) | Parent 1 Share ($) | Parent 2 Share ($) |
|---|---|---|---|
| Work-Related Childcare (S 4062(a)(1)) | [________] | [________] | [________] |
| Uninsured Healthcare Costs (S 4062(a)(2)) | [________] | [________] | [________] |
| Educational Costs or Special Needs (S 4062(b)) | [________] | [________] | [________] |
| Travel for Visitation (S 4062(b)) | [________] | [________] | [________] |
| Other: [________________] | [________] | [________] | [________] |
| TOTAL ADD-ONS | [________] | [________] | [________] |
8. Deviation Factors
☐ No deviation requested
☐ Deviation requested -- Check all applicable factors:
- ☐ Extraordinarily high income where guideline amount exceeds children's reasonable needs
- ☐ A parent is not contributing to the needs of the children commensurate with custodial time
- ☐ Special circumstances render application of the formula unjust or inappropriate
- ☐ Different time-sharing arrangements for different children
- ☐ Equal time-sharing with asymmetric housing-cost burdens
- ☐ Children with special medical or other needs
- ☐ Other: [________________________________]
Requested deviation amount: $[________]/month
Justification: [________________________________]
9. Duration and Modification
Support Commencement Date: [__/__/____]
Anticipated Termination Events:
- ☐ Child reaches age 18 (or 19 if still in high school full-time)
- ☐ Child becomes emancipated
- ☐ Child marries
- ☐ Child enters military active duty
- ☐ Child dies
- ☐ Other: [________________________________]
Total Monthly Child Support Amount: $[________]
Payable by: ☐ Parent 1 ☐ Parent 2
Payment frequency: ☐ Monthly ☐ Bi-monthly ☐ Per pay period
10. Certification and Signatures
I declare under penalty of perjury under the laws of the State of California that the foregoing information is true and correct to the best of my knowledge.
Parent 1:
Signature: [________________________________]
Printed Name: [________________________________]
Date: [__/__/____]
Parent 2:
Signature: [________________________________]
Printed Name: [________________________________]
Date: [__/__/____]
Attorney for Parent 1 (if applicable):
Signature: [________________________________]
Bar Number: [________________________________]
Date: [__/__/____]
Attorney for Parent 2 (if applicable):
Signature: [________________________________]
Bar Number: [________________________________]
Date: [__/__/____]
11. Sources and References
- California Family Code SS 4050-4076 (Statewide Uniform Guideline)
- California Family Code S 4055 (Guideline Formula)
- California Family Code S 4057 (Presumption of Correctness)
- California Family Code S 4057.5 (Low-Income Adjustment)
- California Family Code S 4058 (Annual Gross Income Definition)
- California Family Code S 4059 (Deductions from Gross Income)
- California Family Code SS 4060-4064 (Net Disposable Income Computation)
- California Family Code SS 4062, 4066-4069 (Additional Child Support / Add-Ons)
- California Family Code SS 4070-4073 (Hardship Deductions)
- Judicial Council Forms: FL-150 (Income and Expense Declaration), FL-155 (Financial Statement)
- California Courts Self-Help: https://www.courts.ca.gov/selfhelp-support.htm
This worksheet is intended as a calculation aid and does not replace the official judicial forms required by the California courts. The income of a subsequent spouse or nonmarital partner is generally not considered except in extraordinary cases of extreme hardship (Fam. Code S 4057.5).
About This Template
Family law covers the paperwork that shapes divorce, custody, child support, adoption, guardianship, and other family matters. These filings are emotional and high-stakes, and they also have to meet strict procedural rules for service, financial disclosure, and parenting plans. Clean, accurate paperwork keeps the focus on getting a workable outcome for the family instead of getting derailed by technical problems that delay hearings or force amended filings.
Important Notice
This template is provided for informational purposes. It is not legal advice. We recommend having an attorney review any legal document before signing, especially for high-value or complex matters.
Last updated: May 2026