Montana enforces child support in two places: administratively through the Child Support Services Division (CSSD) of the Department of Public Health and Human Services, and judicially in the district court that entered the order. The main tools are income withholding, support liens, license suspension, tax refund offsets, and contempt. This page, part of our Montana Divorce Guide, describes each one and the protections built into it.
The Enforcement Tools at a Glance
| Tool | What it does | Source |
|---|---|---|
| Income withholding | Support is taken from the paying parent's income by the employer or other payor, immediately or on delinquency. | MCA §§ 40-4-204(5), 40-5-411, 40-5-412 |
| Support lien | A lien on the paying parent's real and personal property, enforceable by a warrant for distraint. | MCA §§ 40-5-247, 40-5-248 |
| License suspension | Suspension of state-issued licenses when the delinquency equals six months of support or more. | MCA §§ 40-5-701 to 40-5-713 |
| State tax refund offset | Past-due support in Division cases is referred to the Department of Revenue for offset. | MCA § 17-4-105; ARM 37.62.1501 |
| Federal tax refund offset | The U.S. Treasury withholds federal refunds for past-due support certified by the state. | 42 U.S.C. § 664 |
| Passport denial | The State Department refuses a passport when certified arrears exceed $2,500. | 42 U.S.C. § 652(k) |
| Credit reporting | The Division may report support debts to consumer reporting agencies. | MCA § 40-5-261; ARM 37.62.1705 |
| Civil contempt | A district court proceeding with jail, community service, or a fine, and a chance to purge. | MCA § 40-5-601 |
| Security for payment | A court may require a bond, mortgage, or other security when six months of support is delinquent. | MCA § 40-4-209 |
Income Withholding
Withholding is the default. Unless the court makes a written exception and includes it in the order, a support obligation "must be enforced by immediate or delinquency income withholding, or both" (MCA § 40-4-204(5)(a)). An order that leaves this out is still subject to withholding without any amendment.
The exceptions are narrow. Income is not subject to immediate withholding if the court or agency finds good cause, or finds an alternative arrangement between the parties that provides sufficient security (MCA § 40-5-411(4)). Good cause requires a written explanation of why immediate withholding would not be in the child's best interests and, in a modification, proof of timely payment (MCA § 40-5-411(5)).
Where an exception applies, withholding begins on delinquency. A parent "becomes delinquent 8 working days after the last day of the month in which the payment is due" (MCA § 40-5-412(1)(b)). The only basis for contesting delinquency withholding is a mistake of fact, such as the wrong person, the wrong amount, or an error in the arrears figure (MCA § 40-5-412(5)).
When arrears are being collected, the amount withheld includes the greater of an amount that would pay the arrears within 2 years or 25% of the obligor's income, subject to the federal cap, and the Division may set a lower amount on a showing of substantial hardship (MCA § 40-5-416).
Support Liens and Warrants for Distraint
A support lien arises on the paying parent's real and personal property when the Division has entered a final decision finding a sum certain debt, or when a support order with such a finding is registered (MCA § 40-5-248(1)). The lien reaches property the parent owns in Montana and property acquired later. It is perfected by filing, for example with the clerk of the district court for real property and with the Department of Justice for titled vehicles (MCA § 40-5-248(7)). The statute provides that a support lien "may not be discharged in bankruptcy" (MCA § 40-5-248(12)).
The Division enforces a lien with a warrant for distraint, which "has the same effect as a writ of execution issued by a district court to enforce money judgments." The warrant must give notice of exemptions and of the right to a hearing on an exemption claim (MCA § 40-5-247(1)).
License Suspension
License suspension applies to a delinquency "greater than or equal to 6 months' support payments" and to a parent who fails to comply with a subpoena or warrant in a support case (MCA §§ 40-5-701(3), 40-5-702(1)). "License" is defined broadly to include an authorization from a state agency to engage in a business, occupation, profession, or conservation activity, or any other privilege subject to suspension (MCA § 40-5-701(5)).
The process has steps. A notice of intent is served personally or by certified mail. The license is suspended 60 days after service unless, within that time, the parent pays the entire debt, enters into an approved payment plan, complies with the subpoena or warrant, or requests a hearing (MCA §§ 40-5-702(3), 40-5-703(1)). A standard payment plan with the Division calls for current support plus at least 1/24 of the arrears each month (ARM 37.62.1305(1)(c)). A suspension may be stayed where it would create a significant hardship for the parent, the parent's employees, dependents in the household, or people the parent serves (MCA § 40-5-710(3)).
Continuing the licensed activity while suspended is a misdemeanor (MCA § 40-5-704(5)).
Tax Refunds, Passports, and Credit Reports
In Division cases, past-due support is referred to the Montana Department of Revenue for offset against state tax refunds, after notice and an opportunity for a hearing (MCA § 17-4-105(2); ARM 37.62.1501). Federal refunds are withheld by the Treasury on the state's certification (42 U.S.C. § 664). A current spouse who filed a joint return and does not owe the debt can ask for that spouse's share back. The IRS calls this an injured spouse claim, made on Form 8379.
Federal law also directs the Secretary of State to refuse a passport to a person certified as owing child support arrears exceeding $2,500 (42 U.S.C. § 652(k)). And the Division may report a support debt to consumer reporting agencies, with advance notice, when the debt equals at least seven times the monthly current support (MCA § 40-5-261; ARM 37.62.1705).
Contempt and Criminal Nonsupport
The parent owed support may petition the district court for contempt. The paying parent is presumed in contempt on a showing that there is a support order, that the parent knew of it, and that the parent failed to pay (MCA § 40-5-601(5)). The parent may be excused by showing, by clear and convincing evidence, an inability to pay that the parent did not bring about voluntarily (MCA § 40-5-601(7), (8)). The petition must be brought within 3 years of the last failure to comply (MCA § 40-5-601(12)). Our page on contempt in family court covers the procedure.
Criminal nonsupport under MCA § 45-5-621 is prosecuted by the State, not by a parent. Anyone facing a criminal charge should speak with a criminal defense lawyer.
If You Are the Parent Who Owes
Every tool above has a notice and hearing step, and deadlines on those notices are short. Do not ignore them. If you cannot pay because your circumstances have changed, the remedy is to ask for a modification promptly, because support continues to come due at the ordered amount until the order is changed. See modifying child support. For what happens to the balance, see unpaid child support and interest. If you are the parent owed support, when your ex stops paying and enforcing a divorce decree cover next steps, and our child support practice page describes how the firm can help.
This page explains Montana and federal law in general as of the 2025 Montana Code Annotated. It is not legal advice about your specific case.