Los Angeles County, California - Co-Parenting Expense & Child Support Guide

Overview

Los Angeles County applies California's statewide uniform guideline for child support, which lives in the California Family Code, sections 4050 to 4076. The formula is identical in every California county. What differs locally is where you file, how long you wait for a hearing, and which self-help services are available.

Child Support Calculation

The statewide guideline formula

California does not use a flat percentage of income. The guideline is an algebraic formula set by Family Code section 4055:

CS = K[HN - (H%)(TN)]

• CS - the child support amount
• K - the share of both parents' income to be allocated to child support
• HN - the higher earner's net monthly disposable income
• H% - the approximate percentage of time the higher earner has, or will have, primary physical responsibility for the children compared to the other parent
• TN - both parents' total net monthly disposable income

The custody time split sits inside the formula, at H%. Two families with identical incomes and a different parenting-time split owe different amounts. That is exactly what a flat percentage of income cannot express, and it is why an online "percentage" table is not the California rule.

Where K comes from

K is not a fixed number either. It equals one plus H% (when H% is 50 percent or less), or two minus H% (when H% is more than 50 percent), multiplied by a fraction that depends on the parents' total net monthly disposable income:

More than one child

For more than one child, the same section multiplies the result by a fixed factor:

• Two children: 1.6
• Three children: 2
• Four children: 2.3
• Five children: 2.5
• Six children: 2.625
• Seven children: 2.75
• Eight children: 2.813
• Nine children: 2.844
• Ten children: 2.86

If the formula produces a positive number, the higher earner pays that amount to the lower earner. If it produces a negative number, the lower earner pays its absolute value to the higher earner.

Net disposable income (Family Code §4059)

Both HN and TN are net disposable income, not gross pay and not take-home pay. Section 4059 deducts from each parent's gross income:

• State and federal income tax actually payable, at the correct filing status
• FICA, or an equivalent amount for parents not subject to FICA
• Mandatory union dues and retirement contributions required as a condition of employment
• Health insurance or health plan premiums for the parent and any children the parent must support, and state disability insurance premiums
• Child or spousal support actually being paid under a court order for someone who is not part of this case
• Job-related expenses, if the court allows them
• A hardship deduction, where one applies

If the paying parent earns very little: the low-income adjustment

The same section that sets the formula carries its own low-income adjustment, at subdivision (b)(7). Where the paying parent's net disposable income for the month is less than the gross monthly pay of a full-time minimum wage job - 40 hours a week, 52 weeks a year, at the minimum wage in Labor Code section 1182.12 - there is a rebuttable presumption that the paying parent is entitled to the adjustment. The reduction is the starting point in that situation, and it is the other parent who has to argue against it - not something the paying parent has to talk a judge into.

The presumption can be rebutted by evidence that the lowest amount the adjustment allows would be unjust and inappropriate in the particular case. In weighing that, the court considers the principles in Family Code §4053 and what the adjustment would do to each parent's net income. The statute also caps how large the reduction can be, by a formula tied to how far below full-time minimum wage the paying parent's net income falls, so the adjustment lowers the guideline figure rather than replacing it. If a court uses software to run the calculation and the paying parent's income qualifies, the program has to show the range of the permitted adjustment.

When the guideline amount can change

The guideline amount is presumed correct. Family Code §4057 lets a court order a different amount only on admissible evidence that the formula would be unjust or inappropriate, with the reasons stated in writing or on the record. The listed grounds include the parents agreeing to a different figure, a parent with an extraordinarily high income where the formula amount would exceed the children's needs, a parent not contributing at a level matching their custodial time, and other special circumstances such as children with special medical needs. The statute sets no dollar threshold for "extraordinarily high income" and no percentage cap - that is a judgment for the court on the facts.

One listed ground is narrower than it is usually reported. The low-income ground, at §4057(b)(5), is not "the paying parent is poor". It applies where the paying parent qualifies for the low-income adjustment described above and, after that adjustment has been applied, the formula amount still exceeds 50 percent of that parent's net disposable income. Any further reduction under this ground may be no greater than the amount above that 50 percent.

Add-On Expenses (Family Code §4062 and §4063)

What counts as an add-on

Some costs sit on top of the base support figure. Under §4062 the court must order two of them as additional child support:

1. 1. Childcare costs actually incurred that relate to employment, or to education or training reasonably necessary for employment skills, unless those costs are already inside the guideline calculation
2. 2. Reasonable uninsured health care costs for the children

The court may also order two more as additional child support:

1. 1. Costs related to the educational or other special needs of the children
2. 2. Travel expenses for visitation

The reimbursement clock

§4063 sets out a real timetable, and it is the part most co-parents get wrong. Check one thing before you rely on it: the timetable opens with the words "unless there has been an assignment of rights pursuant to Section 11477 of the Welfare and Institutions Code". That assignment happens automatically when a parent receives CalWORKs cash aid, because claiming that aid hands the right to collect support over to the county and the state. In those cases the steps below are not what governs, and the county's child support office is the place to ask.

In every other case the steps are:

1. 1. The parent who pays or runs up the cost must give the other parent an itemized statement within a reasonable time, and no more than 90 days after the cost is incurred.
2. 2. If that parent already paid the whole cost, they provide proof of payment and ask for their court-ordered share back.
3. 3. If instead they paid only their own court-ordered share, they provide proof of what they paid, ask the other parent to pay the rest straight to the provider, and hand over whatever information the other parent needs to make that payment. This is the path most people miss: you do not have to front the whole bill to start the clock.
4. 4. The other parent reimburses, or pays the remaining costs, within whatever period the court set. If the order is silent, that is a reasonable time not to exceed 30 days from notification of the amount due, or on the health care provider's own payment schedule - unless the parents agree in writing to a different schedule or the court finds good cause for one.
5. 5. A parent who disputes the request must pay it first and seek relief from the court afterwards. Refusing to pay while you argue is not the procedure the statute gives you.

There is a rebuttable presumption that the amounts actually paid for uninsured health care and for employment-related childcare are reasonable. Either parent can file a motion to enforce, and the court may award filing costs and reasonable attorney's fees against a party who acted without reasonable cause.

Using the court-ordered insurance

Two more rules bite in practice, and both are narrower than they are usually repeated.

1. 1. Court-ordered health insurance coverage is the coverage to be used at all times, consistent with the requirements of that coverage - unless the other parent can show the coverage is inadequate to meet the child's needs. A parent who buys extra coverage on top of it pays for that extra coverage, and for care obtained under it, alone.
2. 2. Where the ordered coverage names a preferred provider, that provider is to be used, again consistent with the terms of the coverage. A parent carries the extra unreimbursed cost only where they used a different provider inconsistently with the terms and requirements of the coverage. Going elsewhere in a way your plan actually allows is not what this rule penalises.

Both rules are expressly subject to §4063(g), and that matters most in an emergency. When ruling on a motion under this section the court has to consider all relevant facts, including geographic access to care that complies with the coverage - with insurance rebuttably presumed accessible where the services are within 50 miles of the child's residence - and the necessity of emergency medical treatment that may have made it impossible to use the court-ordered coverage or its preferred provider, as well as the child's special medical needs and whether a parent can reasonably pay the full amount inside 30 days. So an out-of-network emergency room visit, or a provider your coverage cannot reasonably reach, is not automatically the visiting parent's cost to swallow.

Filing In Los Angeles County

If the informal route fails, the request goes to the court on a Request for Order (form FL-300) in the existing family law case, normally with an Income and Expense Declaration (form FL-150).

Los Angeles Superior Court hears family law matters at courthouses across the county, and which one takes your case depends on where the case already sits. Filing fees, self-help hours, and hearing waits change often, so use the court's own Family Law Division page rather than any figure printed here.

Why SharedAnchor Fits LA County

• The 90-day itemized statement: §4063 starts the clock when the cost is incurred, not when you get round to asking. SharedAnchor timestamps every expense as it is added, so the itemized statement is already built.
• The 30-day reimbursement window: when the court order is silent, the other parent has a reasonable time not exceeding 30 days from notification. SharedAnchor records exactly when notification happened.
• Proof of payment, not just of the bill: §4063 asks for proof of payment when you seek reimbursement. Payments and receipts stay attached to the expense.
• Add-on expenses kept separate: childcare and uninsured health costs are additional child support, not part of the base figure. Categorised expenses keep the two apart.
• Records built for settling it between yourselves: both parents see the same ledger, so there is less to argue about before anyone reaches a courtroom.