Interstate Child Support: UIFSA Explained

This guide is compiled from the child support statutes and published guideline worksheets of the 50 states and the District of Columbia, cross-checked against the federal Office of Child Support Services FY2023 preliminary data report; each state page on this site links to the statute behind its entry, and our methodology records the vintage of each source. Jurisdiction under UIFSA is determined by statute and residence, so what follows describes the interstate framework rather than which state controls any particular order.

The jurisdiction rules below come from the Uniform Interstate Family Support Act as enacted by every US state and the District of Columbia, a condition of federal child support funding since 1998, read alongside each state's own enacting statute and the federal Office of Child Support Services FY2023 preliminary data report. UIFSA sets which state keeps authority over an order; it does not change the amount that order requires.

When parents live in different states, child support becomes more complicated. Which state's laws apply? Which court has the power to change the order? The Uniform Interstate Family Support Act (UIFSA), adopted by all 50 states, provides the answers.

UIFSA Action Pathways

UIFSA streamlines four common interstate scenarios, each with a distinct procedural route:

Worked Example: Direct Income Withholding Across States

Custodial parent lives in Ohio with a $850/month child support order issued by an Ohio court. Non-custodial parent moves to Florida and starts a new job at $4,800/month gross. Under UIFSA's direct income withholding provision, Ohio's IV-D agency mails the standardized OMB-Form-0970-0154 IWO directly to the Florida employer. The employer must comply with Florida's Consumer Credit Protection Act ceiling (typically 50-65% of disposable earnings), withholding the $850/month and remitting to Ohio's State Disbursement Unit, no Florida court action required, no registration step needed.

"Only the state with continuing, exclusive jurisdiction may modify a child support order. All other states must enforce the existing order as written." - UIFSA §205, codified by all 50 states + DC

Average child support collected per enforcement case, by state

The One-Order Principle

UIFSA's core rule: only one state can have "continuing, exclusive jurisdiction" over a child support order at any given time. This prevents both parents from racing to different state courts to get favorable orders.

Which State Has Jurisdiction?

Generally, the state that issued the original child support order retains jurisdiction as long as:

• The child still lives in that state, OR
• One of the parents still lives in that state

When both parents and the child have all moved out of the original state, jurisdiction can transfer. Either parent may then register the order in the state where the other parent (or the child) lives and seek modification there.

Registering an Out-of-State Order

If you need to enforce a child support order across state lines, you can register it in the new state. Registration doesn't change the order, it just allows the new state to enforce it. To modify the order, you'd typically need to establish jurisdiction in the new state first.

Direct Income Withholding

Under UIFSA, a child support agency can send a direct income withholding order to an employer in another state without going through that state's courts. This is the primary enforcement tool for interstate cases.

Working with Your State's Child Support Agency

If you have a Title IV-D case, your state's child support enforcement agency can help with interstate cases at no cost, including:

• Locating a non-custodial parent who has moved out of state
• Establishing a new support order across state lines
• Enforcing an existing order when the obligor lives in a different state
• Registering foreign orders for enforcement

If You're Moving to a Different State

If you're the custodial parent and plan to move, notify the other parent and the court. Your existing order remains valid and enforceable in the new state. If you later want to modify the order, UIFSA rules will determine which state has jurisdiction to do so, typically where the other parent lives if you've both left the original state.