Montana divorces carry an automatic economic restraining order under Mont. Code Ann. § 40-4-126, a 90-day residency requirement, and equitable distribution rules that give judges wide discretion over all property, including assets acquired before the marriage. Understanding what not to do during divorce in Montana is as important as knowing the correct steps to take. One wrong move, such as hiding assets, badmouthing a co-parent, or draining a joint account, can cost tens of thousands of dollars in sanctions, result in an unfavorable custody ruling, or extend a case that might otherwise settle in 60 to 90 days into an 18-month courtroom battle. This guide identifies the 10 most damaging mistakes Montana divorce litigants make and explains exactly how to avoid each one.
| Key Fact | Details |
|---|---|
| Filing Fee | $200 filing + $50 judgment = $250 total (as of May 2024; verify with your local clerk) |
| Waiting Period | 20 days after service before decree can enter (Mont. Code Ann. § 40-4-105) |
| Residency Requirement | 90 days of domicile in Montana (Mont. Code Ann. § 40-4-104) |
| Grounds | No-fault only: irretrievable breakdown of the marriage |
| Property Division | Equitable distribution of all property, whenever acquired (Mont. Code Ann. § 40-4-202) |
| Automatic Restraining Order | Mandatory upon filing; prohibits transferring or concealing marital property (Mont. Code Ann. § 40-4-126) |
| Spousal Maintenance | Based on need, ability to pay, and marriage duration (Mont. Code Ann. § 40-4-203) |
| Child Custody Standard | Best interest of the child, 13 statutory factors (Mont. Code Ann. § 40-4-212) |
1. Violating Montana's Automatic Economic Restraining Order
Montana is one of a growing number of states that issues a mandatory automatic economic restraining order the moment a divorce petition is filed, as codified in Mont. Code Ann. § 40-4-126. The order binds the petitioner upon filing and the respondent upon service. Violating this order can result in contempt of court, monetary sanctions, and an unfavorable property division. The restraining order prohibits both spouses from transferring, concealing, or disposing of any marital property without written consent or a court order.
The automatic restraining order specifically bars spouses from canceling credit cards, incurring unreasonable debt, withdrawing funds from retirement accounts, changing life insurance beneficiaries, and allowing insurance policies to lapse. Montana courts allow exceptions only for expenses that maintain the marital standard of living and for necessities of life such as food, clothing, shelter, healthcare, transportation, and childcare. Extraordinary expenditures require 14 days of advance written notice to the other party under Mont. Code Ann. § 40-4-126.
Many people learn about what not to do during divorce in Montana only after they have already violated this order. If you need to make a major purchase or financial decision, either obtain your spouse's written agreement or file a motion with the district court requesting permission. Ignoring this requirement is one of the biggest divorce mistakes a Montana litigant can make because the court can impose sanctions and credit the other spouse with the value of any dissipated or concealed assets when dividing property under Mont. Code Ann. § 40-4-202.
2. Hiding Assets or Misrepresenting Finances
Montana requires full financial disclosure from both parties during a dissolution proceeding, and the court divides all property equitably under Mont. Code Ann. § 40-4-202, regardless of when or how assets were acquired. Hiding assets is one of the most serious common divorce errors because Montana judges have the authority to divide every asset either spouse owns, including property brought into the marriage. Attempting to conceal bank accounts, cryptocurrency wallets, real estate holdings, or business interests will almost certainly be discovered during discovery, and the consequences are severe.
Montana courts routinely impose sanctions on parties who fail to disclose assets honestly. A judge can award a disproportionate share of the marital estate to the innocent spouse to compensate for the concealment. In extreme cases, the court may hold the offending party in contempt, resulting in fines or even jail time. The dissipation doctrine under Montana case law places the initial burden on the accusing spouse to identify suspicious spending patterns, but once that threshold is met, the burden shifts to the hiding spouse to justify every dollar.
Forensic accountants in Montana typically charge $150 to $400 per hour, and a full asset investigation can cost $5,000 to $25,000. Spouses who attempt to hide assets often end up paying for both their own forensic accountant and their spouse's expert fees, turning a $250 filing fee case into a five-figure financial disaster. Full, honest disclosure from day one is always the cheaper option.
3. Using Children as Leverage or Alienating the Other Parent
Montana courts determine parenting plans using the best interest of the child standard set out in Mont. Code Ann. § 40-4-212, which lists 13 specific factors judges must consider. Factor (f) addresses physical abuse or threats, factor (g) addresses chemical dependency, and factor (l) creates a presumption that frequent and continuing contact with both parents serves the child's best interest. Using children as bargaining chips or attempting to alienate a child from the other parent directly undermines the court's presumption under factor (l) and can result in a custody arrangement that favors the alienated parent.
Specific behaviors that Montana judges view negatively include refusing court-ordered parenting time, making disparaging remarks about the other parent in front of children, intercepting communication between a child and the other parent, and coaching children to express preferences the child does not genuinely hold. Under Mont. Code Ann. § 40-4-212(1)(m), the court also considers the adverse effects of continuous and vexatious parenting plan amendment actions, meaning that a parent who files repeated motions to reduce the other parent's time may actually lose credibility with the court.
The practical consequences are substantial. Montana courts can modify an existing parenting plan at any time if the child's best interest requires it, and documented alienation behavior is one of the most compelling reasons for a judge to shift primary residential responsibility to the other parent. Parents who prioritize cooperation over conflict consistently achieve better outcomes in Montana family courts.
4. Posting on Social Media During Your Divorce
Social media posts are admissible evidence in Montana divorce proceedings, and attorneys routinely monitor opposing parties' Facebook, Instagram, TikTok, and X accounts for damaging content. A single photograph showing expensive purchases, vacations, or new relationships can undermine claims of financial hardship in a maintenance hearing under Mont. Code Ann. § 40-4-203. Posts expressing anger toward a spouse can be used as evidence of poor temperament in a custody dispute under Mont. Code Ann. § 40-4-212.
The safest approach during a Montana divorce is to stop posting on all social media platforms entirely until the case is finalized. At minimum, avoid discussing your divorce, your spouse, your finances, or your children online. Do not delete existing posts either, as destroying potential evidence can result in spoliation sanctions. Courts can draw adverse inferences from deleted content, assuming the destroyed evidence would have been unfavorable to the party who deleted it.
Even private messages are not safe. Montana courts can order the production of private messages, direct messages, and even messages sent through dating apps during discovery. Approximately 81% of family law attorneys nationwide report using social media evidence in divorce cases, according to the American Academy of Matrimonial Lawyers. Montana is no exception. Every post, comment, like, and check-in creates a discoverable record that can and will be used in court.
5. Moving Out of the Family Home Without a Plan
Leaving the family home during a Montana divorce without a court order or written agreement can affect both property division and parenting time outcomes. Under Mont. Code Ann. § 40-4-202, Montana courts consider the economic circumstances of each spouse when dividing property, and a spouse who voluntarily leaves may find it more difficult to argue for exclusive possession of the home later. More critically, moving away from children can establish a status quo parenting arrangement that the court may formalize in the final parenting plan under Mont. Code Ann. § 40-4-212.
Before moving out, Montana divorce attorneys generally recommend establishing a written temporary agreement that addresses parenting time, financial responsibilities for mortgage or rent, and access to marital property. Alternatively, either spouse can petition the court for temporary orders under Mont. Code Ann. § 40-4-121, which allows the court to issue directives regarding property use, child custody, and financial support while the case is pending. A temporary restraining order can be granted for up to 21 days without notice if there is a showing of irreparable injury.
The exception to this guidance is domestic violence. If you are in danger, leave immediately and contact the Montana National Domestic Violence Hotline at 1-800-799-7233 or the Montana Coalition Against Domestic and Sexual Violence. Montana courts will not penalize a spouse for leaving the home to escape abuse, and protective orders are available under the Montana Partner and Family Member Assault Act.
6. Refusing to Negotiate or Insisting on a Contested Divorce
The average contested divorce in Montana costs between $10,000 and $25,000 in attorney fees and takes 6 to 18 months to resolve, while an uncontested divorce costs between $1,500 and $5,000 and can be finalized in as few as 30 to 60 days after the 20-day service period under Mont. Code Ann. § 40-4-105. Refusing to negotiate in good faith is one of the most expensive divorce mistakes a Montana litigant can make.
Montana's 2025 legislative session expanded access to simplified dissolution through SB 372, which now allows couples with children to use the simplified process if they have an agreed-upon parenting plan. Previously, simplified dissolution was available only to couples without children and without a pregnancy. This change makes negotiation even more advantageous in 2026 because parties who reach agreement on all issues, including parenting, can avoid the contested track entirely.
| Factor | Uncontested Divorce | Contested Divorce |
|---|---|---|
| Average Attorney Fees | $1,500 - $5,000 | $10,000 - $25,000 |
| Average Timeline | 30 - 90 days | 6 - 18 months |
| Court Appearances | 0 - 1 | 3 - 10+ |
| Filing Fee | $250 | $250 + motion fees |
| Mediation Required | No | Often court-ordered |
| Emotional Toll | Lower | Significantly higher |
| Simplified Process Eligible (SB 372, 2025) | Yes, even with children | No |
Mediation in Montana typically costs $150 to $350 per hour, with most cases resolving in 2 to 4 sessions totaling $1,200 to $2,800. Compared to the $10,000+ cost of contested litigation, mediation represents an 80% to 90% savings. Montana courts frequently order mediation before trial in contested cases, so parties who refuse to negotiate early often end up mediating anyway, having already spent thousands on pretrial motions.
7. Making Major Financial Decisions Without Legal Advice
Montana's equitable distribution statute, Mont. Code Ann. § 40-4-202, gives courts the authority to divide all property belonging to either or both spouses, however and whenever acquired. Making major financial decisions during a divorce, such as refinancing a home, taking on new debt, cashing out retirement accounts, or starting a business, can dramatically alter the property division calculus and trigger violations of the automatic restraining order under Mont. Code Ann. § 40-4-126.
Early withdrawal from a retirement account, for example, triggers a 10% federal penalty for account holders under age 59.5, plus ordinary income tax on the withdrawn amount. A $50,000 early withdrawal could result in $5,000 in penalties plus $12,000 to $16,000 in federal and Montana state income taxes, reducing the actual benefit to approximately $29,000 to $33,000 while depriving the marital estate of the full $50,000 value. Montana judges can credit the other spouse with the full pre-tax value when calculating equitable distribution.
Before making any financial decision with a value exceeding $500 during a Montana divorce, consult with your attorney. If you do not have an attorney, at minimum provide 14 days of written notice to your spouse as required by the automatic restraining order for extraordinary expenditures. Montana Legal Services Association offers free legal assistance to qualifying individuals through their website at montanalawhelp.org.
8. Ignoring Court Orders or Missing Deadlines
Montana district courts have broad contempt powers, and ignoring a court order during a divorce proceeding can result in fines, attorney fee awards to the other party, modification of custody or support arrangements, and in extreme cases, incarceration. Under Mont. Code Ann. § 40-4-105, the respondent has 20 days after service to file an answer to the petition. Missing this deadline can result in a default judgment, meaning the court may grant the petitioner everything requested in the original petition without the respondent's input.
Common court orders that parties violate include temporary support orders, parenting time schedules, property preservation directives, and disclosure deadlines. Each violation compounds the problem because Montana judges track compliance history and use it to assess credibility. A party who has violated multiple orders will face an uphill battle when arguing for favorable terms at trial. The court may also award the compliant spouse reasonable attorney fees incurred in enforcing the violated order, adding $2,000 to $10,000 or more to the violating party's costs.
Montana's automatic economic restraining order under Mont. Code Ann. § 40-4-126 is itself a court order. Every provision of that order, from the prohibition on transferring property to the requirement for 14-day advance notice of extraordinary expenditures, carries the force of law. Treating court orders as suggestions rather than mandates is among the most consequential things you should never do during a divorce in Montana.
9. Communicating Directly with Your Spouse Through Your Children
Using children as messengers between divorcing parents is a common divorce error that Montana courts take seriously when evaluating parenting plans under Mont. Code Ann. § 40-4-212. Factor (c) requires the court to consider the interaction and interrelationship of the child with parents and other significant persons, and placing a child in the middle of parental conflict damages that relationship. Factor (i) addresses the developmental needs of the child, and child psychologists consistently find that children used as intermediaries experience higher rates of anxiety, depression, and loyalty conflicts.
Montana family courts increasingly require high-conflict parents to use monitored communication platforms such as OurFamilyWizard or TalkingParents, which cost approximately $100 to $150 per year per parent. These platforms create a timestamped, unalterable record of all parental communication that judges can review. Using a communication platform demonstrates cooperation and shields children from conflict, both of which are positive factors in a Montana custody evaluation.
Direct communication between spouses, whether in person, by phone, by text, or by email, should focus exclusively on logistics related to the children: pickup times, school events, medical appointments, and schedule changes. All financial and legal discussions should occur through attorneys. This separation protects both the children's wellbeing and the parent's legal position. Montana courts have broad discretion under Mont. Code Ann. § 40-4-212 to modify parenting plans when a parent's behavior harms the child's best interest.
10. Failing to Document Everything
Montana divorce cases are decided on evidence, and the party with better documentation almost always achieves a more favorable outcome. Under Mont. Code Ann. § 40-4-202, equitable property division requires the court to assess the value of all assets and the financial circumstances of each spouse. Without thorough documentation, a spouse may be unable to prove the existence, value, or character of contested assets, leaving the court to rely on the other party's representations.
Essential documents to preserve and organize during a Montana divorce include 3 to 5 years of tax returns, bank statements for all accounts, retirement and investment account statements, real estate appraisals, vehicle titles and valuations, business financial statements, credit card statements, loan documents, and insurance policies. Montana's automatic restraining order under Mont. Code Ann. § 40-4-126 prohibits destroying or concealing documents, so both parties have a legal obligation to maintain complete financial records.
Beyond financial records, parents involved in custody disputes should document parenting time, school involvement, medical appointments attended, extracurricular activities, and any incidents of concern regarding the other parent's behavior. Montana courts consider continuity and stability of care under Mont. Code Ann. § 40-4-212(1)(h), and a parent who can demonstrate consistent, documented involvement with their children holds a significant advantage. Keep a contemporaneous parenting journal with dates, times, and specific details rather than relying on memory months later at trial.
Frequently Asked Questions About What Not to Do During Divorce in Montana
What is the automatic restraining order in a Montana divorce?
Montana issues a mandatory automatic economic restraining order under Mont. Code Ann. § 40-4-126 with every divorce filing. The order prohibits both spouses from transferring, concealing, or disposing of marital property without written consent or a court order. It takes effect immediately upon filing for the petitioner and upon service for the respondent. Violations can result in contempt sanctions and an unfavorable property division.
Can I date during my Montana divorce?
Montana is a purely no-fault divorce state, meaning marital misconduct cannot be used as grounds for dissolution or as a factor in spousal maintenance under Mont. Code Ann. § 40-4-203. However, dating during a divorce can still harm your case if money spent on a new relationship constitutes dissipation of marital assets under Mont. Code Ann. § 40-4-202, or if the new relationship negatively affects children under the best interest factors of Mont. Code Ann. § 40-4-212.
How long does a divorce take in Montana?
An uncontested Montana divorce can be finalized in approximately 30 to 90 days, including the 20-day minimum period after service required by Mont. Code Ann. § 40-4-105. Contested divorces typically take 6 to 18 months. Montana's 2025 SB 372 expanded simplified dissolution to include couples with children who have an agreed-upon parenting plan, potentially reducing timelines for families that reach agreement.
What happens if I violate a court order during my Montana divorce?
Violating a court order in a Montana divorce can result in contempt of court, monetary fines, an award of the other party's attorney fees (typically $2,000 to $10,000), and modification of custody or support arrangements. Missing the 20-day deadline to answer the petition under Mont. Code Ann. § 40-4-105 can result in a default judgment granting the petitioner's requested terms without your input.
Does Montana divide all property in a divorce, including premarital assets?
Yes. Montana is one of the few states where courts can divide all property belonging to either or both spouses, regardless of when or how it was acquired, under Mont. Code Ann. § 40-4-202. This includes premarital assets, inheritances, and gifts. The court applies equitable distribution principles, considering factors such as marriage duration, each spouse's earning capacity, and contributions to the marriage including homemaking.
Can social media posts be used against me in a Montana divorce?
Yes. Social media posts, photographs, check-ins, and even private messages are admissible evidence in Montana divorce proceedings. Approximately 81% of family law attorneys report using social media evidence in cases. Posts showing expensive purchases can undermine maintenance claims under Mont. Code Ann. § 40-4-203, and negative comments about a spouse can affect custody determinations under Mont. Code Ann. § 40-4-212. Do not delete posts, as that can trigger spoliation sanctions.
Should I move out of the family home during a Montana divorce?
Moving out without a written agreement or court order can negatively affect both property division and custody outcomes. Under Mont. Code Ann. § 40-4-212, Montana courts consider the child's adjustment to home and community, and leaving can establish a status quo parenting arrangement favoring the remaining spouse. Before moving, obtain a temporary order under Mont. Code Ann. § 40-4-121 or a written agreement addressing parenting time and financial responsibilities. The exception is domestic violence, where safety must come first.
How much does a contested divorce cost in Montana compared to uncontested?
A contested divorce in Montana costs between $10,000 and $25,000 in attorney fees and takes 6 to 18 months, while an uncontested divorce costs between $1,500 and $5,000 and can be finalized in 30 to 90 days. The filing fee is $250 for both types, consisting of a $200 filing fee and a $50 judgment fee under MCA § 25-1-201. Mediation, at $150 to $350 per hour, typically resolves cases in 2 to 4 sessions for $1,200 to $2,800, representing 80% to 90% savings over contested litigation.
What should I document during my Montana divorce?
Document everything. Essential records include 3 to 5 years of tax returns, all bank and investment account statements, retirement account balances, real estate appraisals, vehicle valuations, business financials, and insurance policies. For custody cases, maintain a contemporaneous parenting journal noting dates and times of parenting activities, school events attended, and medical appointments. Montana courts evaluate continuity of care under Mont. Code Ann. § 40-4-212(1)(h), and documented involvement carries significant weight.
Can my spouse and I waive the automatic restraining order in Montana?
Yes. Under Mont. Code Ann. § 40-4-126, both parties may jointly waive some or all provisions of the automatic economic restraining order in writing. Either party may also petition the court to expand, limit, modify, or revoke the order. However, waiving the order should only be done with legal counsel, as it removes important protections against asset dissipation. The order automatically dissolves upon dismissal of the case or entry of the final decree of dissolution.