Breaking Down The Child Support Formula

Following a divorce, when children are factored in, child support becomes one of the biggest ongoing expenses parents face. These court-ordered payments provide for the continued care and maintenance of your children.

In California, the child support formula considers a wide range of financial factors. Among other factors, this calculation considers:

• The income of each parent.
• The amount of time each parent spends with the child or children.
• Potential tax deductions.
• Level of need.

California state law requires the court to follow these guidelines to ensure uniformity from case to case.

How Is Child Support Determined?

According to the California Department of Child Support Services:

Child support is determined using guidelines established by California law and is based on many factors, including each parent’s ability to financially provide for the children.

The law requires each parent to complete an Income and Expense Declaration and provide proof of the amount of income.

In deciding the amount of child support, the court will consider income from all sources, whether or not it is reported or taxed under federal law. The income can be in the form of money, property or services.

Incredibly simplified, the state determines child support payments based on the parents’ net disposable income and the amount of time each parent serves as the primary caregiver. In reality, it’s much more complex than that, but that’s the basic idea.

Please note: Welfare payments and Supplemental Security Income (SSI) are not included as income.

Related Reading: How Are Assets Split In A Divorce In California?

What Is The Child Support Formula?

In California, there is an actual mathematical child support formula. It looks remarkably similar to a problem from high school algebra. (And you thought you’d never use algebra.)

CS = K [HN – (H%) (TN)]

Here’s What Each Variable Means:

• • CS:  The child support amount. Just like back in the day, this is the ultimate sum we’re trying to figure out. Think of it as “X equals” if that helps, and X, in this case, represents the payment amount.
  • K: The total of both parents’ income. Child support is deducted from this total. Income includes monthly salary before taxes and other sources, such as bonuses or commissions. This also accounts for how much the parents earn and how much time the highest earner spends with the kids.
  • HN: High net, which is the total disposable income for the higher-earning parent.
  • H%: This represents the percentage of time the higher-earning parent spends as the primary guardian responsible for the child. This depends on the parenting plan, custody arrangement, and visitation. For example, if this parent has the kids 25% of the time, H% equals 25.
  • TN: The combined net monthly total disposable income between the two parents.

While the child support formula looks complicated, and it is, this all serves to nail down the specific amount.

In general, the larger the income gap between the two parents and the less time the higher-earning parent spends caring for the kids, the more child support that parent owes.

For example:

• If the child’s mother is the primary caregiver 20 percent of the time and the father is the primary caregiver 80 percent of the time, then the mother could be responsible for a larger payment to the child’s father.
• If the mother earns $60,000 a year and the father earns $40,000 a year, it is most likely the mother will be responsible for bearing a greater percentage of the cost of raising the child.

Calculate Your Own Responsibility

To start your journey through the child support formula, you need a variety of information about income, taxes, and finances. You need:

• Your most recent tax returns, paycheck stubs, and tax forms, like W-2s or 1099s.
• Any paperwork that documents disability or unemployment benefits.
• Health insurance premiums.
• A list of child care costs.
• Records of mandatory fees, such as union dues or retirement contributions.
• A list of job-related expenses.
• If you have child support payments for other children, spousal support payments, or similar costs, also collect those.

In addition to your personal information, you also need to enter the same data for the child’s other parent.

It may help to familiarize yourself with the child support formula beforehand. That way, you know what to collect and have ready when you plug in the numbers.

Open Child Support Calculator

This does not provide you with a final, official number. This is for educational purposes only, but if you plug in the correct numbers, you should get a reasonable idea of potential child support payments.

Custody and child support are critical topics in divorce and family law. Every case and set of circumstances is different, and you must get accurate information regarding your situation.

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