Divorce Checklist for Montana: Everything You Need in 2026

Filing for divorce in Montana requires a $250 court filing fee, 90 days of residency under MCA § 40-4-104, and a mandatory 21-day waiting period before the court can enter a final decree under MCA § 40-4-105. Montana is a purely no-fault state where the sole ground for dissolution is that the marriage is "irretrievably broken." An uncontested divorce in Montana typically takes 30 to 90 days from filing to final decree, while contested cases involving property division or child custody disputes may require 6 to 18 months. This divorce checklist for Montana walks you through every required step, document, and deadline so you can move forward with confidence.

Residency and Eligibility Requirements

Montana requires at least one spouse to be domiciled in the state for a minimum of 90 consecutive days immediately before filing a Petition for Dissolution of Marriage, as established by MCA § 40-4-104. Active-duty military members stationed in Montana also satisfy this 90-day requirement. Montana has no separation period requirement before filing.

The 90-day residency threshold is among the shorter requirements nationwide, where some states mandate 6 months or even 12 months of residency. Montana courts interpret "domicile" as your primary, permanent home where you intend to remain. Simply renting a cabin for 90 days while maintaining your primary residence in another state does not establish Montana domicile. Courts may request evidence of domicile including a Montana driver's license, voter registration, utility bills, or a lease or deed in your name.

You must file your Petition for Dissolution in the District Court of the county where either spouse resides. Montana has 56 counties organized into 22 judicial districts, and each District Court has a Clerk of Court who accepts dissolution filings. If neither spouse meets the 90-day residency threshold, Montana courts lack jurisdiction to hear the case and will dismiss the petition.

Military families face additional considerations under federal law. The Servicemembers Civil Relief Act (SCRA) allows active-duty members to request a stay of proceedings for up to 90 days if military service materially affects their ability to participate. A service member stationed at Malmstrom Air Force Base in Great Falls, for example, satisfies Montana residency even if their home of record is another state.

Grounds for Divorce in Montana

Montana is a purely no-fault divorce state where the only legally recognized ground for dissolution is that the marriage is "irretrievably broken" under MCA § 40-4-104. Montana courts do not consider fault, adultery, abandonment, or cruelty when granting a divorce. This means neither spouse needs to prove the other did anything wrong to obtain a dissolution.

When one spouse asserts the marriage is irretrievably broken and the other denies it, the court may order counseling and continue the matter for 30 to 60 days under MCA § 40-4-107. If the court finds after counseling that reconciliation efforts have failed, it will proceed with the dissolution. Montana courts cannot deny a divorce if one party genuinely believes the marriage cannot be repaired, making Montana one of the most straightforward states for obtaining a dissolution decree.

The no-fault standard also means that marital misconduct such as infidelity or financial irresponsibility cannot be used as a factor in property division under MCA § 40-4-202. Montana law explicitly prohibits the court from considering marital misconduct when dividing assets. However, conduct that results in dissipation of marital assets, such as gambling away retirement savings, may be addressed through the equitable distribution analysis as a financial factor rather than a fault-based claim.

Step-by-Step Filing Process

Filing for divorce in Montana involves 8 distinct procedural steps, from preparing your initial petition through obtaining a final decree. The total filing cost is $250, consisting of a $200 filing fee and a $50 judgment fee under the Montana District Court fee schedule (updated May 2024). The responding spouse pays an additional $70 fee to file an Answer, bringing combined initial costs to approximately $320.

1. Prepare your Petition for Dissolution of Marriage using Montana court-approved forms available at courts.mt.gov. The petition must state the date and place of marriage, the names and birthdates of all minor children, a declaration that the marriage is irretrievably broken, and your requested relief regarding property, support, and custody.

2. Complete required financial disclosures. Montana requires each party to serve preliminary financial disclosures including income documentation, tax returns for the past 2 years, bank and investment account statements, and a list of all assets and debts.

3. File the Petition and Summons with the Clerk of District Court in the appropriate county. Pay the $250 filing fee or submit a Statement of Inability to Pay Court Costs if you qualify for a fee waiver. Montana courts accept electronic filing through the Montana Courts E-Filing system in most judicial districts.

4. Serve your spouse. Montana requires personal service by a sheriff, constable, or professional process server under MCA § 40-4-105. The respondent has 21 days from service to file a Response. If your spouse cannot be located after diligent effort, the court may authorize service by publication in a local newspaper for 3 consecutive weeks.

5. Exchange preliminary declarations of disclosure within 60 days of filing, unless both parties agree in writing to waive or modify this timeline under the provisions of SB 372 (2025).

6. Negotiate a settlement agreement or proceed to trial. Approximately 90% of Montana divorces settle without a full trial. If you have minor children, you must submit a proposed Parenting Plan addressing custody, visitation schedules, decision-making authority, and child support.

7. Attend the final hearing. After the 21-day waiting period expires, the court will schedule a brief hearing (often 15 to 30 minutes for uncontested matters) to review your agreement, confirm the marriage is irretrievably broken, and verify that any parenting plan serves the children's best interests.

8. Receive the Decree of Dissolution. The decree is final when entered by the court under MCA § 40-4-108 and is immediately effective. Either party may remarry once the decree is entered, even if an appeal is pending on other issues.

Essential Documents Checklist

Montana divorce preparation requires gathering approximately 15 to 20 categories of documents before filing. Organizing these documents early reduces attorney fees by 20% to 40% according to Montana family law practitioners, because your attorney spends less time requesting and reviewing records during discovery.

Personal identification documents needed include certified copies of your marriage certificate (obtainable from the Montana Department of Public Health and Human Services for $5 per copy), birth certificates for all minor children, Social Security cards, passports, and current Montana driver's licenses for both spouses.

Financial documents form the largest category in any Montana divorce checklist. Gather federal and state tax returns for the prior 3 years, W-2s and 1099s, pay stubs covering at least 3 months, bank statements for all accounts (checking, savings, money market) for the past 12 months, credit card statements for all accounts for the past 12 months, mortgage statements, vehicle loan documents, student loan records, and retirement account statements including 401(k), IRA, pension, and TSP accounts.

Real property documents include deeds, mortgage notes, property tax assessments, homeowner's insurance declarations, and recent appraisals or comparative market analyses. Montana counties maintain property records through the Clerk and Recorder's office, and you can obtain copies of deeds for approximately $2 per page.

Business ownership documents are critical if either spouse owns a business. Gather formation documents (articles of incorporation, LLC operating agreements, partnership agreements), 3 years of business tax returns, profit-and-loss statements, balance sheets, and any buy-sell agreements.

Insurance documentation should include life insurance policies, health insurance cards and plan summaries, auto insurance declarations, and long-term disability or long-term care policies. Montana courts may order continuation of health insurance coverage through COBRA during the divorce proceedings.

Property Division Under Montana Law

Montana divides marital property using equitable distribution under MCA § 40-4-202, meaning the court divides assets fairly but not necessarily equally. Unlike community property states that default to a 50/50 split, Montana courts consider multiple factors to determine what division is equitable given each spouse's circumstances. Montana courts have broad discretion to divide all property belonging to either or both spouses, regardless of when or how it was acquired.

Montana is notable because courts may distribute property acquired before the marriage, inherited property, and gifts received during the marriage. There is no automatic exemption for "separate property" as exists in many other states. Under MCA § 40-4-202, the court considers the duration of the marriage, each spouse's age and health, each spouse's occupation and income, vocational skills and employability, the contribution of each spouse as a homemaker, each spouse's liabilities and needs, and whether the property division is in lieu of or in addition to maintenance.

Retirement accounts and pensions often represent the largest marital asset after the family home in Montana divorces. Dividing a 401(k) or pension requires a Qualified Domestic Relations Order (QDRO), which typically costs $500 to $1,500 to prepare. Montana courts apply the "time rule" to pensions earned partially during the marriage, awarding the non-employee spouse a fraction proportional to the years of marriage overlapping with years of pension accrual.

Child Custody and Parenting Plans

Montana requires every divorce involving minor children to include a Parenting Plan filed with the court under MCA § 40-4-234. The Parenting Plan must address the child's residential schedule with each parent, decision-making authority for education, healthcare, and religious upbringing, holiday and vacation schedules, transportation arrangements, and a dispute resolution process. Montana courts evaluate all custody arrangements using the "best interests of the child" standard under MCA § 40-4-212.

Montana uses the term "parenting" rather than "custody" and "visitation" in its statutory framework. The court considers 13 specific factors when evaluating a Parenting Plan, including the wishes of each parent, the wishes of the child (if mature enough), the interaction and relationship of the child with each parent, the child's adjustment to home, school, and community, and any history of physical abuse or threat of abuse. Montana courts presume that a parent who has committed domestic violence is not entitled to be awarded sole or joint custody.

The 2025 legislative session brought significant changes through SB 372, which expanded eligibility for summary dissolution to include couples with children who have an agreed-upon parenting plan. Previously, the summary dissolution process was limited to couples without minor children. This change allows parents who agree on custody, visitation, and child support to use the faster summary dissolution process, potentially reducing the timeline from 3 to 6 months down to 30 to 60 days.

Montana parents must attend a "Parenting After Separation" educational seminar before the court will finalize custody arrangements. This court-approved program costs approximately $25 to $50 per parent and covers the impact of divorce on children, effective co-parenting communication, and strategies for reducing conflict. Most Montana judicial districts offer both in-person and online options for completing this requirement.

Child Support Calculations

Montana calculates child support using the Income Shares model under MCA § 40-5-209 and Administrative Rules of Montana (ARM) 37.62. The Income Shares model combines both parents' gross incomes, determines a total child support obligation based on standardized guidelines tables, and then allocates each parent's share proportionally to their income. Montana updates its child support guidelines tables at least every 4 years as required by federal law.

The Montana Child Support Services Division, part of the Department of Public Health and Human Services, publishes the official guidelines tables used in all child support calculations. For a combined parental gross income of $10,000 per month with 2 children, the guidelines table establishes a total child support obligation of approximately $1,800 to $2,000 per month under the 2025 guidelines tables. The non-custodial parent's share is then calculated as their percentage of combined income.

Montana child support orders must also address health insurance coverage for the children under MCA § 40-4-204. The court must order one or both parents to provide health insurance if it is available at a reasonable cost, generally defined as not exceeding 5% of the obligated parent's gross income. Unreimbursed medical expenses exceeding $250 per child per year are typically split between parents in proportion to their incomes.

Child support in Montana may be modified when there is a change in circumstances resulting in a 25% or greater variation from the existing order. Either parent may petition the court for modification. Montana child support obligations generally continue until the child reaches age 18 or graduates from high school, whichever occurs later, but no later than age 19.

Spousal Maintenance (Alimony)

Montana courts may award spousal maintenance under MCA § 40-4-203 when a spouse lacks sufficient property to provide for their reasonable needs and is unable to support themselves through appropriate employment, or is the custodian of a child whose condition or circumstances make it inappropriate for that spouse to seek outside employment. Montana does not use the term "alimony" in its statutes, instead referring to "maintenance."

Montana has no statutory formula for calculating maintenance duration or amount. Courts exercise broad discretion based on factors including the financial resources of the requesting spouse, the time necessary to acquire education or training for appropriate employment, the standard of living established during the marriage, the duration of the marriage, the age and physical and emotional condition of the requesting spouse, and the ability of the paying spouse to meet their own needs while paying maintenance.

In practice, Montana courts commonly award maintenance for marriages lasting 10 years or longer. For marriages of 20 or more years, indefinite or long-term maintenance is more common, particularly when one spouse sacrificed career development to support the household. Short-term maintenance lasting 1 to 3 years is typical for marriages of 5 to 10 years, with the purpose of allowing the lower-earning spouse to become self-supporting through education or job training. Montana courts may award rehabilitative maintenance (limited duration with a specific goal) or permanent maintenance (ongoing until death, remarriage, or further court order).

Summary Dissolution: The Faster Path

Montana offers a summary dissolution process under MCA § 40-4-130 for couples who meet specific eligibility criteria, providing a streamlined alternative that can be completed in as few as 20 to 30 days. Following the 2025 passage of SB 372, summary dissolution eligibility was expanded to include couples with minor children who have an agreed-upon parenting plan, a significant change from the prior law that restricted this process to childless couples.

To qualify for summary dissolution in Montana, both spouses must agree the marriage is irretrievably broken, have resolved all issues regarding property division, support, and (if applicable) child custody, and meet the asset and debt thresholds established by statute. The joint petition must be signed by both parties. The court holds a brief hearing no sooner than 20 days after filing, at which the judge confirms both parties understand and consent to the terms.

The summary dissolution process eliminates the need for formal service of process, full discovery, and a traditional contested hearing. This reduces attorney fees from a typical $5,000 to $15,000 range for standard uncontested divorces down to $1,500 to $3,000 for summary dissolution cases. The $250 filing fee remains the same regardless of whether you use the standard or summary dissolution process.

Montana Divorce Cost Breakdown

The total cost of a Montana divorce ranges from $250 for a self-represented summary dissolution to $25,000 or more for a contested case involving custody disputes, business valuations, and expert witnesses. The median cost for an attorney-represented uncontested divorce in Montana falls between $5,000 and $8,000 based on 2024 to 2025 data from Montana family law practitioners.

As of May 2024, Montana District Court charges $250 to file a dissolution petition. Verify current fees with your local Clerk of District Court, as administrative surcharges may vary by county. Fee waivers are available for individuals who demonstrate financial hardship by filing a Statement of Inability to Pay Court Costs.

Montana attorney hourly rates for family law typically range from $200 to $400 per hour depending on the attorney's experience, geographic location, and case complexity. Attorneys in Billings and Missoula tend to charge at the higher end of this range, while practitioners in rural areas may charge $175 to $275 per hour.

Protecting Yourself During Divorce

Montana law provides several protective mechanisms during the divorce process that every person preparing for divorce should understand. Filing a dissolution petition automatically triggers a mutual restraining order under Montana District Court standing orders in most judicial districts, prohibiting both parties from transferring, concealing, or disposing of marital assets outside the ordinary course of business.

Open individual bank and credit card accounts in your name alone before or immediately after filing. Montana courts cannot prevent you from establishing new individual accounts, but they can penalize parties who deplete joint accounts or run up joint debt during the dissolution process. Document the balances of all joint accounts on the date of filing, as this establishes a baseline for property division calculations.

Secure your digital accounts by changing passwords on personal email, social media, and financial accounts. Remove your spouse as an authorized user on any credit cards you intend to keep. Order a free credit report from all three bureaus (Equifax, Experian, TransUnion) to identify all debts in your name or jointly held. Montana courts consider all debts when making the equitable distribution determination under MCA § 40-4-202.

If domestic violence is a concern, Montana offers Temporary Orders of Protection under MCA § 40-15-201 that can be obtained on an emergency basis without the other party being present. The Montana Coalition Against Domestic and Sexual Violence maintains a 24-hour helpline and can connect you with local resources, shelter programs, and legal aid organizations.

Frequently Asked Questions

The following questions represent the most common concerns raised by individuals preparing a divorce checklist for Montana proceedings. Each answer references the applicable Montana statute or court rule.