Who gets child support arrears depends on one thing: whether the custodial parent ever received public assistance for the child. If they didn’t, every dollar of back support belongs to them. If they did, the state can claim a share of what’s collected to reimburse itself for the benefits it paid, and federal law sets a strict order for splitting the money between the family and the government.
If No Public Assistance Was Involved
When the custodial parent raised the child without government help, arrears are a plain debt from one parent to the other. Collections go entirely to the custodial parent. The state agency may handle the enforcement work, but it keeps none of the money. This covers the large majority of private child support cases.
The debt doesn’t shrink on its own either. Most states add interest to unpaid support from the date each payment was originally due, so the balance owed to the custodial parent typically grows over time rather than staying flat.
If the Family Received TANF
Families that apply for Temporary Assistance for Needy Families must assign their child support rights to the state as a condition of receiving benefits. The assignment lets the state step into the custodial parent’s position and pursue the noncustodial parent for support owed during months the family was on assistance. Federal law treats that obligation as a debt owed to the state.1Administration for Children and Families. ACF Dear Colleague Letter on State TANF and Child Support Cooperation Flexibilities
Where the collected money actually goes depends on whether the family is still on TANF or has left the program. Federal law lays out a specific distribution order for each.2Office of the Law Revision Counsel. 42 USC 657 – Distribution of Collected Support
While the Family Is Still Receiving Assistance
Collections are split between the state and federal governments to reimburse the cost of benefits. The federal government takes its share based on the Federal Medical Assistance Percentage for that state, and the state keeps its share, up to the total amount of assistance paid to the family. Anything left over after full reimbursement goes to the family.2Office of the Law Revision Counsel. 42 USC 657 – Distribution of Collected Support
Some states soften that by passing a portion of the child support directly to the family even while benefits continue. Federal rules permit a pass-through of up to $100 per month for a family with one child and up to $200 per month for families with two or more children, without reducing the TANF grant. Roughly half of states have adopted some form of pass-through.
After the Family Leaves Assistance
The rules shift in the family’s favor once TANF ends. Current support goes to the family first. For arrears, any amount owed for periods when the family was not on assistance (called unassigned arrears) also goes to the family. Only after the family is fully paid on unassigned arrears does the state start recovering its share for the months the family was on assistance. Anything collected beyond full state reimbursement goes back to the family.2Office of the Law Revision Counsel. 42 USC 657 – Distribution of Collected Support
So a former TANF family with both private and state-owed arrears will see their own debt paid off before the state recovers a dollar.
Arrears Don’t End When the Child Turns 18
A common assumption is that back support disappears once the child becomes an adult. It doesn’t. Arrears are owed to the custodial parent, not to the child, and the obligation has nothing to do with the child’s age. The custodial parent spent the money raising the child during the years support went unpaid, and that debt remains collectible after the child grows up.
Some states do impose a statute of limitations on collecting arrears after the child reaches adulthood. Deadlines vary widely, from around 10 years in some states to no limit at all in others. Missing a state’s deadline can make the debt unenforceable even though it’s still technically owed, so custodial parents sitting on an old balance should check their state’s rule rather than wait.
If a Parent Dies Before Arrears Are Paid
Death doesn’t erase arrears. It changes who collects or who pays, and the process gets more complicated.
When the Custodial Parent Dies
The unpaid balance becomes an asset of the custodial parent’s estate. The executor or personal representative collects the debt, and any funds recovered pass to the heirs or beneficiaries through probate. The noncustodial parent still owes the full amount; the payee simply changes.
When the Noncustodial Parent Dies
The custodial parent must file a creditor’s claim against the deceased parent’s estate in probate court. Timing matters. Estates publish a notice to creditors, and the filing deadline is often tied to that publication date. Missing the deadline can bar recovery even on a valid debt.
Priority also matters. Child support arrears often rank lower in probate than people expect. Administration costs, funeral expenses, and certain other debts may be paid first, and if the estate runs short, arrears may be only partially satisfied or not paid at all.
Whether the estate also owes future support for surviving minor children is a separate question that turns on state law. Some states allow a claim against the estate for the remaining support obligation; others treat the duty to pay ongoing support as ending at death.
Reducing What’s Owed to the State
When arrears include a balance owed to the state for public assistance reimbursement, that portion can sometimes be reduced. At least 36 states and the District of Columbia have some form of arrears compromise policy, though eligibility rules vary.3Administration for Children and Families. State Child Support Agencies With Debt Compromise Policies
These programs generally target parents who genuinely cannot pay rather than those who choose not to. Common requirements include low income, a history of incarceration or serious illness during the period arrears accrued, and a commitment to keeping current support paid going forward. Many programs require 12 to 24 months of consistent payments before any state-owed debt is forgiven.
The boundary is important: a compromise program only reduces what the parent owes the state. Arrears owed to the custodial parent cannot be forgiven by a state agency. Only a court can change what’s owed to the other parent, and most courts will not retroactively reduce arrears that have already accrued. A parent who falls behind should seek a modification of the current support order quickly rather than let arrears build and try to negotiate them down later.