Is There a Statute of Limitations on Child Support in AZ?

There is no true statute of limitations on child support in Arizona. Every installment that comes due and goes unpaid automatically becomes a court judgment by operation of law, and those judgments stay enforceable until the balance is paid in full.¹ The ten-year figure that gets repeated in online discussions is not an expiration date; it is a defensive window the owing parent can try to use, and only under specific conditions.

How Long Arrears Stay Collectible

A.R.S. 25-503(I) treats each unpaid installment as a final judgment the moment it comes due. The custodial parent or the Arizona Division of Child Support Services (DCSS) can also request a formal written judgment for accumulated arrears at any point. Under A.R.S. 25-503(M), these support judgments are exempt from the renewal requirements that apply to ordinary civil judgments and remain enforceable until paid.¹

So where does ten years come in? Under A.R.S. 25-503(L), if collection efforts continue more than ten years after the youngest child’s emancipation, the owing parent may raise a defense of unreasonable delay. The burden is on that parent to show the custodial parent or the state sat on the debt without making reasonable collection efforts. If the court agrees, it can declare some or all of the remaining debt uncollectible going forward.¹

That defense is narrow. If the custodial parent or DCSS has been actively pursuing the debt during that period, with documented collection efforts, the argument falls apart. Arizona’s appellate courts have also treated child support debt as surviving in substance even when a formal written judgment was not obtained within some earlier procedural window, allowing administrative collection to continue.² The practical point for anyone owed support: keep records of every collection action, every call, every payment demand. Silence is what the defense needs.

When the Ten-Year Clock Starts

The ten-year unreasonable-delay window does not begin until the youngest child is emancipated, so understanding when emancipation occurs matters for anyone trying to figure out their timeline.

Under A.R.S. 25-503(Q), emancipation happens on the child’s 18th birthday, at marriage, upon adoption by another person, or upon death. If support was extended past 18, emancipation happens when the extended obligation ends.¹

Two situations extend the obligation past 18:

If the child turns 18 while still in high school or a certified equivalency program, support continues until graduation or the 19th birthday, whichever comes first.³
For a child with a mental or physical disability, the court can order support to continue past the age of majority after weighing the factors in A.R.S. 25-320(D).³

Pin down the emancipation date for the youngest child, add ten years, and that is the earliest point at which the owing parent can raise an unreasonable-delay argument. Before that date, the defense is not even available.

Interest That Keeps the Debt Growing

Unpaid child support in Arizona accrues simple interest at 10% per year under A.R.S. 25-510(E). Interest starts running at the end of the month following the month each payment was due, applies only to the principal, and does not compound.⁴

One exception is worth knowing. Past support ordered retroactively under A.R.S. 25-320(C) and reduced to a written judgment on or after September 26, 2008, does not accrue any interest.⁴ Regular ongoing payments that go unpaid, by contrast, build interest steadily for as long as the debt sits.

Over years, that 10% rate reshapes the number. A $20,000 principal balance left alone for five years picks up another $10,000 in interest. The absence of a hard cutoff on collection, combined with interest that keeps running, is why Arizona arrears cases sometimes involve debts larger than the original obligation ever was.

How the Debt Gets Collected While It’s Alive

Because the debt does not expire, enforcement can come from several directions at once, and both the custodial parent and DCSS have tools available.

Income withholding is the default. When a support order is entered, the court assigns part of the owing parent’s income to the recipient under A.R.S. 25-504. An ex parte order of assignment can be issued by the court clerk without a hearing, and the employer must begin withholding within 14 calendar days of being served.⁵

Once the owing parent is at least 12 months behind, DCSS can levy property under A.R.S. 25-521, reaching bank accounts, investment accounts, and other financial assets not protected by federal or state exemptions. The department can also seize and sell real or personal property, and liens on real estate or vehicles block any sale or refinancing until the arrears are resolved.⁶

At six months behind, licenses are on the table. Driver’s licenses and recreational licenses can be suspended through a court hearing under A.R.S. 25-517, and professional and occupational licenses can be suspended through a separate administrative process once the same six-month threshold is met.⁷

When a court orders a parent to appear personally in a child support matter and that parent fails to show up after receiving actual notice, A.R.S. 25-681 authorizes a child support arrest warrant. The warrant stays active until executed, and the arrested person must either pay a court-determined amount or be brought before a judge.⁸

Willful nonpayment can also be charged criminally. Under A.R.S. 25-511, a parent who knowingly fails to provide reasonable support for a minor child is guilty of a class 6 felony. Inability to pay is a defense, but a parent who voluntarily remains unemployed, voluntarily cuts their income, or takes on obligations that crowd out support cannot rely on it.⁹

Federal Reach: Passport and Tax Refund

Federal law adds consequences the state cannot. Under 42 U.S.C. 652(k), when a state agency certifies that a parent owes more than $2,500 in child support arrears, the Secretary of State can deny a new passport application or revoke an existing one.¹⁰ The restriction continues even after the balance drops back below $2,500; federal law does not require automatic removal.¹¹

Federal tax refunds can also be intercepted and redirected to the arrears through the federal tax refund offset program, coordinated in Arizona by DCSS.

Retroactive Support Where No Order Existed

If you are asking about collecting support for years when there was no order in place at all, a different limit applies, and it is easy to confuse with the collection question above.

When a parent files for dissolution, legal separation, or a standalone child support action and no existing order covers the child, the court applies the child support guidelines back to the date of filing, accounting for any voluntary or temporary support already provided.¹²

If the parents lived apart before filing, the court can reach back further to the date of separation, but no more than three years before the filing date. The court considers how quickly the custodial parent filed and whether the other parent frustrated service of process.¹² That three-year lookback is the outer boundary; the statute does not carve out an exception for income concealment, though evidence that the other parent frustrated service can shape how the court applies the retroactive period.

Modification Cannot Erase Past-Due Amounts

Arizona lets either parent petition for a modification when circumstances have changed substantially and the change is ongoing. Under A.R.S. 25-327(A), the court can raise or lower support going forward, but it cannot retroactively change amounts that accrued as arrears before the other parent received notice of the modification petition.¹³

For a parent whose income has dropped, every month of delay before filing is a month of arrears that cannot be adjusted downward later. For a parent owed support, modification does not and cannot wipe out past-due amounts the other parent might argue should be reduced. Common qualifying changes include job loss, a significant income shift, disability, new medical needs, the end of daycare costs, and changes in health insurance coverage.¹³

In Title IV-D cases handled through DCSS, reviews happen every three years without any showing of changed circumstances. A parent who wants a review sooner must demonstrate the same substantial and continuing change required in any other modification request.¹

1
Arizona Legislature. Arizona Code 25-503 – Order for Support; Methods of Payment; Modification; Termination; Statute of Limitations; Judgment on Arrearages; Notice; Security
2
FindLaw. In re the Matter of State of Arizona, ex rel., Department of Economic Security (Linda Dann), v. Jack Hayden
3
Arizona Legislature. Arizona Code 25-501 – Duties of Support
4
Arizona Legislature. Arizona Code 25-510 – Receiving and Disbursing Support and Maintenance Monies; Interest
5
Arizona Legislature. Arizona Code 25-504 – Order of Assignment; Ex Parte Order of Assignment; Responsibilities; Violation; Termination
6
Arizona Legislature. Arizona Code 25-521 – Levy; Seizure of Property for Collection of Support Debt; Definitions
7
Arizona Legislature. Arizona Code 25-517 – License Suspension; Notice; Administrative Review or Hearing
8
Arizona Legislature. Arizona Code 25-681 – Child Support Arrest Warrant; Definition
9
Arizona Legislature. Arizona Code 25-511 – Failure to Provide for Minor Child or Spouse; Classification; Definitions
10
Office of the Law Revision Counsel. 42 USC 652 – Duties of Secretary
11
Administration for Children and Families. Passport Denial Program 101
12
Arizona Legislature. Arizona Code 25-320 – Child Support; Factors; Methods of Payment; Additional Enforcement Provisions; Definitions
13
Arizona Legislature. Arizona Code 25-327 – Modification and Termination of Provisions for Maintenance, Support and Property Disposition