Child support across state lines (UIFSA)

Parents often end up in different states after a separation, and a child support order has to work across those borders. Every state has adopted the same law for this, the Uniform Interstate Family Support Act (UIFSA). Federal law makes it a condition of the child support program: under 42 U.S.C. § 666(f), each state must have UIFSA in effect, including the amendments adopted as of 2008. A separate federal statute, the Full Faith and Credit for Child Support Orders Act, requires each state to enforce other states’ orders and limits when it can change them.

The result is a system with one central idea: at any time there is one controlling order, issued by one state, and other states enforce it rather than writing their own. This guide explains how that works in practice. It quotes the Texas version of UIFSA, Texas Family Code, Chapter 159, as an example; other states’ versions use the same structure and largely the same words, with a few local differences noted below.

Which state’s guidelines set the amount

When a new order is set, the state that hears the case applies its own guidelines. The Texas text is direct: a responding tribunal determines “the duty of support and the amount payable in accordance with the law and support guidelines of this state.” The state that hears the case is usually the one with personal jurisdiction over the paying parent: where that parent lives, or another state with a recognized connection, such as having lived there with the child.

The choice of state can change the guideline amount a lot, because the formulas differ. For a family with two children where Parent A earns $60,000 a year and Parent B earns $40,000, with the children living mainly with Parent B, the guideline amount is $1,050 in Texas, $1,154 in New York and $1,332 in California. Those are monthly estimates for the same family; the child support calculator shows how each state reaches its figure.

There is no choosing a state for its formula. Jurisdiction rules decide where the case is heard, and the state hearing it applies its own guidelines. Courts in every state can deviate from their guidelines when the guidelines allow it.

One order, and the state that controls it

Once a state issues an order, it has continuing, exclusive jurisdiction to modify it. Under Texas Family Code § 159.205, the issuing state keeps that power as long as the paying parent, the receiving parent or the child lives there, or the parties agree in a record that it should keep the case. Another state may enforce the order, but it may not change it while the issuing state still has jurisdiction.

This prevents the competing orders that earlier laws allowed, when a parent could move and ask a new state for a lower amount. If more than one order already exists for the same parent and child, UIFSA has rules for picking the controlling one: an order from a state that still has continuing, exclusive jurisdiction wins, and between two such states, the order from the child’s current home state controls.

The issuing state loses the power to modify only when everyone has left it, or when all the parties agree in writing that another state may take over. Even then, the new state does not automatically get the case. Someone has to register the order there and ask for a change.

Registering an order in another state

Registration is how an order from one state becomes enforceable in another. The party or agency sends the order, with its payment history, to the right tribunal in the new state. That state then notifies the other parent.

The notice explains that the order is enforceable as of registration, states any arrears claimed, and gives a deadline to contest. In Texas, a hearing to contest the validity or enforcement of the registered order must be requested within 30 days after notice; other states set their own period in their version of the act, so read the notice itself. If nobody contests in time, the order and the claimed arrears are confirmed, and later challenges are very limited. The defenses are narrow, such as lack of personal jurisdiction, fraud in obtaining the order, a later modification, or payment.

Registration for enforcement does not change the order. The new state applies its own enforcement procedures, but the amount, the duration and the interest on arrears still follow the law of the state that issued it. Some enforcement does not need registration at all: an income withholding order from one state can go straight to an employer in another, which must honor it.

For arrears, the child support arrears calculator estimates a balance and interest under the issuing state’s rules, and the guide to child support enforcement covers the tools agencies use.

Modifying an order after a move

To modify an order from another state once the issuing state has lost jurisdiction, the order is registered in a state that has jurisdiction over the parent who is not asking for the change. In practice, the parent who wants the change usually files in the other parent’s state. The federal statute, 28 U.S.C. § 1738B, sets the same rule, which keeps a parent from moving and filing at home. There is one exception: if both parents now live in the same new state and the child no longer lives in the issuing state, that state can take the case.

The state that modifies applies its own guidelines to the new amount. But it cannot change anything the issuing state’s law makes unchangeable, and the length of support is the most important example. Federal law says the duration of current payments is governed by the law of the issuing state.

Here is how that plays out. Support in New York generally continues to age 21, while in Texas the general age is 18. If a New York order is later modified in Texas, the Texas court sets the new monthly amount under Texas guidelines, but support still runs to the age New York law sets. The guide to when child support ends compares the ages by state.

For the practical steps when a parent is about to move, see moving out of state with a child support order. Before asking for a change, compare the current order with an estimate under the guidelines that would apply. The modification calculator shows the gap, and the guide on how to modify child support explains the thresholds states use.

Getting help from child support agencies

Many interstate cases go through state child support agencies rather than private lawsuits. A parent applies in their own state, which acts as the initiating agency and sends the case to the agency in the other state. Federal law requires each state to offer its services to residents of other states on the same terms as its own residents, so the parent in the other state can get help too. The guide on how to apply for child support explains the application and the federal fees.

A few habits make interstate cases smoother:

• Keep certified copies of every order, and the payment history from the state disbursement unit.
• Tell the agency when you move, change jobs or change your address. Withholding follows the employer, and notices follow the address on file.
• Open every notice of registration and note the deadline at once; it is short.
• Do not assume a move ends the old order. Payments stay due under it until a state with jurisdiction modifies it.

Families who move often for work face these rules again and again; the guide to child support for military parents covers the extra protections and pay rules that apply to service members.

Interstate rules are technical, and the details vary at the edges from state to state. The child support agency in either state can explain the next step, and a family law attorney can advise on your situation.