Child Support

Child Support Arrears in California: What You Need to Know

When payments fall behind, the consequences stack up fast

Child support arrears are one of the most persistent problems in family law. Unlike other debts, they do not go away. They accrue interest. They can trigger wage garnishment, license suspension, property liens, and even passport denial. And perhaps most frustratingly, they are very difficult to reduce retroactively once they have accumulated. Whether you are owed child support and the other parent is not paying, or you are the paying parent who has fallen behind, understanding how California handles arrears is essential. At Hayat Family Law, we assist clients in Encino and Woodland Hills with both enforcement and defense of child support arrears claims. This article explains how arrears work, how they are calculated, and what your options are.

What Happens When Child Support Payments Fall Behind

The moment a child support payment is missed, the arrears clock starts ticking. Under California law, child support arrears accrue interest at the rate of 10% per year. This is a statutory rate set by the state and it is not negotiable. It applies to both the principal amount owed and any previously accrued interest, which means arrears can compound over time. A missed payment of one thousand dollars becomes eleven hundred dollars after one year, and it keeps growing from there.

The interest rate is high for a reason. The legislature wants to create a strong incentive for paying parents to stay current. But for parents who genuinely cannot pay due to job loss, disability, or other circumstances beyond their control, the 10% interest rate can turn a manageable shortfall into a crushing debt that takes years to clear. This is why it is critical to seek a modification of the support order as soon as your circumstances change, rather than waiting and hoping the problem resolves itself.

How Arrears Are Calculated: The State Disbursement Unit

California uses the State Disbursement Unit, or SDU, to track and process child support payments. When a wage assignment is in place, the employers withholdings are sent to the SDU, which then forwards the payment to the receiving parent. The SDU maintains a detailed record of every payment received, every payment missed, and the interest that accrues on unpaid balances.

If you are the receiving parent and you believe arrears have accumulated, you can request an arrears statement from the SDU or from your local child support agency. This statement will show the original order amount, the date each payment was due, the date each payment was received, the amount of each payment, and the interest accrued on any unpaid balance. It is the official record that courts rely on when enforcing arrears.

Errors do happen. Payments can be misapplied. Wage assignments can be delayed. Overpayments can occur when the paying parent pays directly instead of through the SDU. If you disagree with the arrears calculation, you have the right to challenge it, but the burden is on you to prove the calculation is wrong. This usually requires producing your own records of payments made, including canceled checks, bank statements, or money transfer receipts.

Key Point: Interest on child support arrears accrues at 10% per year under California law. This rate applies automatically and cannot be waived by agreement of the parties. The only way to stop interest from accruing is to pay the arrears in full or obtain a court order modifying the support obligation prospectively.

Enforcement Tools: Wage Garnishment, Liens, License Suspension

California has some of the most aggressive child support enforcement tools in the country. Under Family Code sections 4500 through 4509 and 5000 through 5009, the court and the local child support agency have broad authority to collect unpaid support. These tools include:

These tools can be used individually or in combination. A parent with significant arrears might face wage garnishment, a property lien on their home, and a suspended drivers license all at the same time. The cumulative effect can be devastating, which is why addressing arrears early is so important.

When Arrears Can Be Modified Retroactively

Here is the hard truth: child support arrears generally cannot be modified retroactively. If you owed five hundred dollars per month for the past six months and you did not pay, you still owe three thousand dollars plus interest. You cannot go to court and ask the judge to erase that debt because you lost your job three months ago. The court can only modify support prospectively, meaning from the date you file your Request for Order forward.

This rule exists to protect the child and the receiving parent. If the paying parent could simply stop paying and then retroactively reduce the amount owed, the child would go without support during the gap period. The law places the burden on the paying parent to seek modification promptly when circumstances change.

There is a narrow exception. If the original support order was based on a mistake of fact, such as an incorrect income calculation, the court may be able to correct the order retroactively. But this is rare and requires strong proof. For most parents, the only path forward is to file for modification immediately upon a material change in circumstances and to continue paying as much as possible while the motion is pending.

Bankruptcy and Child Support Arrears

Child support is treated differently from almost every other type of debt in bankruptcy. Under federal bankruptcy law, child support obligations are classified as domestic support obligations and are not dischargeable in bankruptcy. This means that filing for Chapter 7 or Chapter 13 bankruptcy will not eliminate your child support arrears. The arrears survive the bankruptcy and must still be paid in full.

In a Chapter 13 bankruptcy, you may be able to include child support arrears in your repayment plan, which can spread the payments over three to five years. But the underlying obligation remains. Interest continues to accrue on any unpaid balance. And the bankruptcy court cannot modify the amount of child support owed or the interest rate. Those issues must be addressed in family court, not bankruptcy court.

Defending Against Incorrect Arrears Claims

If you are the paying parent and you believe the arrears calculation is wrong, you need to act quickly. The first step is to gather your own records of every payment you have made. This includes canceled checks, bank statements showing automatic withdrawals, money transfer receipts, and any direct payments you made to the other parent. If you paid directly rather than through the SDU, you need proof that the payments were actually received and applied to support.

Common errors in arrears calculations include double counting payments, failing to credit direct payments, misapplying payments to the wrong case, and calculating interest incorrectly. If you can document these errors, you can file a motion in family court to correct the arrears balance. You may also need to subpoena records from the SDU or the local child support agency to get a complete payment history.

In some cases, the receiving parent may have agreed to accept a lower amount informally. Verbal agreements to reduce support are generally not enforceable in California unless they are approved by the court. But if you have evidence that the other parent accepted reduced payments with the understanding that they satisfied your obligation, that may be relevant to an equitable defense. These cases are fact specific and require careful legal analysis.

The information on this website is for general information purposes only. Nothing on this site should be taken as legal advice for any individual case or situation.