Back child support in Arizona is past-due support that accrues 10% simple annual interest under A.R.S. § 25-510, has no statute of limitations for collection (eliminated September 21, 2006), and cannot be discharged in bankruptcy. Once a payment comes due, it vests as a judgment under A.R.S. § 25-503 and courts cannot retroactively reduce it. The Division of Child Support Services (DCSS) enforces arrears through wage withholding, tax intercepts, license suspension, and passport denial above $2,500.
Key Facts: Back Child Support in Arizona
| Factor | Arizona Rule |
|---|---|
| Interest rate on arrears | 10% simple interest per year (A.R.S. § 25-510) |
| Statute of limitations on collection | None (eliminated September 21, 2006) |
| Retroactive support limit | 3 years before filing (A.R.S. § 25-320(C)) |
| When arrears vest | When each payment comes due (A.R.S. § 25-503) |
| Contempt threshold | 30 days delinquent |
| Passport denial threshold | $2,500 in arrears |
| License suspension threshold | 6 months behind |
| Bankruptcy dischargeable | No (federal priority debt) |
| Modification petition fee | $102 statewide (as of March 2026) |
| Enforcement agency | DCSS (Department of Economic Security) |
What Is Back Child Support in Arizona?
Back child support in Arizona refers to court-ordered support payments that a parent failed to pay on time, which become a legally enforceable debt the moment each payment is missed. Under A.R.S. § 25-503, every support payment becomes a vested right as it comes due, meaning the unpaid amount converts into a judgment automatically. This child support debt accrues 10% annual interest and remains collectible indefinitely.
Arizona law distinguishes between two categories of unpaid child support. The first is past due child support, which is the accumulation of missed payments under an existing order. The second is retroactive support, which a court awards for periods before any support order existed, such as the time between a child's birth and the establishment of paternity. Both categories create enforceable child support arrears, but they follow different rules for how far back a court can reach.
The critical principle governing back child support Arizona cases is vesting. Once a payment date passes without full payment, the obligor parent owes that exact amount plus interest, and no court has authority to forgive it retroactively. This rule protects the financial interests of the child and creates the predictable, enforceable debt structure that DCSS relies on for collection.
How Much Interest Accrues on Arizona Child Support Arrears?
Arizona charges 10% simple interest per year on all unpaid child support under A.R.S. § 25-510. Interest begins accruing at the end of the month following the month in which each payment was due, and it applies only to the principal balance, never compounding on previously accrued interest. A $1,000 missed payment grows by $100 after one year, reaching $1,100 owed.
The statute treats two situations identically for the 10% rate. Arrears that have not been reduced to a final written money judgment accrue interest at 10% per year beginning the end of the month after the due date. Arrears that have been reduced to a final written money judgment also accrue interest at 10% per year on principal only. In both scenarios, the simple-interest structure means the past due child support debt grows linearly rather than exponentially, which benefits obligors compared to compounding states.
One important exception affects retroactive support judgments. Under A.R.S. § 25-510, past support reduced to a final written money judgment on or after September 26, 2008, pursuant to A.R.S. § 25-320(C) or A.R.S. § 25-809(B), does not accrue interest at all. Judgments entered before that date still accrue 10% interest from entry. Arizona DCSS provides an official arrears calculator (the eCalc tool) whose figures are statutorily presumed correct, removing much of the dispute over how much child support debt a parent actually owes.
Is There a Statute of Limitations on Back Child Support in Arizona?
There is no statute of limitations on collecting established child support arrears in Arizona. The legislature eliminated the collection deadline effective September 21, 2006, and child support judgments do not expire. A parent can pursue past due child support decades after it accrued, even after the child reaches adulthood, until the entire debt plus 10% interest is satisfied in full.
This indefinite enforcement window aligns with the federal Bradley Amendment of 1986, which prohibits the retroactive modification of any child support obligation once it becomes due. Under both federal and Arizona law, each missed payment hardens into a permanent judgment. Courts in Arizona generally lack authority to dismiss or reduce vested arrears, with narrow exceptions such as proof of direct payment or a properly filed written waiver signed by the parent entitled to receive support.
The absence of a limitations period distinguishes back child support Arizona debt from ordinary civil judgments, which typically expire. A parent who owes child support cannot simply wait out a deadline. The debt follows the obligor indefinitely and continues compounding through 10% simple interest, which is why outstanding arrears in long-dormant cases frequently exceed the original principal by a wide margin.
How Far Back Can a Court Award Retroactive Support in Arizona?
Arizona courts can award retroactive child support for up to 3 years before the date the support petition was filed, under A.R.S. § 25-320(C). This 3-year cap applies only to new awards covering periods before any order existed, such as when a custodial parent seeks support years after a child's birth. The court may enter judgment for that prior period, but the lookback is limited to three years.
This 3-year retroactive rule operates separately from the no-limit rule on collecting established arrears. If a support order already exists and a parent simply stopped paying, every missed payment remains collectible forever with no three-year ceiling. The three-year cap applies exclusively to retroactive support, also called back support, which a court establishes for a past period when no order had yet been entered. Understanding this distinction is essential for parents on both sides of a child support debt dispute.
The practical effect is that the timing of filing matters enormously for retroactive claims. A custodial parent who waited five years to seek support for a child born outside an existing order can recover only the most recent three years. By contrast, a parent enforcing a longstanding order faces no time barrier whatsoever. This asymmetry reflects Arizona's policy of protecting children's vested support rights while limiting open-ended liability where no order ever directed payment.
How Does Arizona Enforce Back Child Support?
Arizona enforces back child support through the Division of Child Support Services (DCSS), which deploys wage garnishment, tax refund interception, property liens, license suspension, passport denial, and contempt proceedings. Income withholding automatically deducts payments from the obligor's wages, while federal and state tax refunds are seized to cover arrears. These administrative tools operate without repeated court hearings, making collection efficient and continuous.
License suspension is among the most powerful enforcement mechanisms. If a parent falls at least 6 months behind, DCSS can suspend professional and occupational licenses administratively without a court order. Driver's license suspension requires court involvement. Passport restrictions follow a federal partnership: once arrears exceed $2,500, DES reports the debt to the U.S. Secretary of State, who may deny a new passport or revoke an existing one until the past due child support is paid in full.
Contempt of court is a power held exclusively by judges, not DCSS. A custodial parent or DCSS may file a petition for contempt once the obligor is at least 30 days delinquent. Under A.R.S. § 25-502, the court issues an order to appear, and a parent who ignores notice may face a child support arrest warrant with a court-set purge amount required for release. Penalties for contempt include fines, jail time, asset seizure, and the full range of administrative remedies, making willful nonpayment a serious legal risk.
Can Back Child Support Be Discharged in Bankruptcy in Arizona?
Back child support cannot be discharged in bankruptcy in Arizona. Federal bankruptcy law classifies child support arrears as a priority domestic support obligation that survives both Chapter 7 and Chapter 13 filings. A parent who owes child support debt will still owe the full principal plus 10% interest after the bankruptcy concludes, and the automatic stay does not stop most child support enforcement actions.
This non-dischargeability reflects the strong public policy favoring children's financial support. While bankruptcy can wipe out credit card balances, medical bills, and many other debts, past due child support stands alongside taxes and certain other obligations as permanently enforceable. In a Chapter 13 reorganization, the obligor may be required to pay arrears in full through the repayment plan before the plan can be confirmed, prioritizing the support debt over most other creditors.
The combination of no statute of limitations, 10% annual interest, and bankruptcy non-dischargeability makes Arizona child support arrears among the most durable debts in the legal system. A parent cannot escape the obligation through the passage of time, financial collapse, or relocation to another state, since interstate enforcement mechanisms extend Arizona's reach nationwide.
How Do Out-of-State Child Support Orders Get Enforced in Arizona?
Arizona enforces out-of-state child support orders through the Arizona Uniform Interstate Family Support Act (AUIFSA), codified at A.R.S. § 25-1301 and following sections. A parent registers the foreign support order with an Arizona court, and once registered, it becomes fully enforceable as if an Arizona court had issued it, covering both current support and accumulated arrears.
The registration process carries a strict deadline for challenges. Under A.R.S. § 25-1305, a parent who wishes to contest the validity or enforcement of a registered order must request a hearing within 20 days after the notice is mailed or personally served. If the obligor misses this 20-day window, the court may confirm the registered order along with any claimed arrears, and the parent loses the right to dispute the underlying foreign judgment or the stated arrearage amount.
This interstate framework means that relocating away from the state where support was ordered provides no escape from a child support debt. AUIFSA allows direct income withholding across state lines and coordinated enforcement among state child support agencies. An Arizona parent with arrears under an order from another state, or an out-of-state parent owing under an Arizona order, faces the same collection tools regardless of geography, including wage garnishment, tax intercepts, and license sanctions.
Can Arizona Child Support Arrears Be Reduced or Forgiven?
Arizona courts generally cannot reduce or forgive vested child support arrears, because each payment becomes a permanent judgment when it comes due under A.R.S. § 25-503 and the federal Bradley Amendment. The principal balance is fixed once it accrues, and judges lack authority to retroactively eliminate it. Limited exceptions exist for documented direct payments and formal waivers signed by the parent entitled to receive support.
The statute provides a specific mechanism for crediting payments made outside the official channel. Under A.R.S. § 25-510, any credit against support arrearages other than by court order requires a written affidavit of direct payment, or a written waiver of arrears, signed by the recipient parent. The affidavit must be filed with the clerk of the court and entered into the statewide case registry. Without this documentation, informal cash payments may not reduce the recorded child support debt.
While the principal cannot be forgiven, courts retain some flexibility on payment terms and on interest in narrow situations. A judge can establish a manageable payment plan toward arrears and may adjust the rate at which an obligor pays down the debt. However, this flexibility addresses how the arrears are paid, not whether they are owed. Parents seeking relief from overwhelming arrears should pursue payment plans, direct-payment credits, or, where applicable, the interest exception for post-2008 retroactive judgments rather than expecting outright forgiveness.