Divorce in Montana: Costs, Laws, and Calculators (2026)

Everything you need to understand the financial reality of divorce in Montana. State-specific costs, formulas, and free calculators.

Our estimate, uncontested
$1,500 - $3,500
Our estimate, contested
$9,000 - $28,000
Estimated timeline
3 - 10 months
DCE State Score
68 / 100

By our own estimates, Montana divorces cost about 52% less than our national working figure of $12,900.

Montana uses the Melson child support formula and allows only no-fault divorce.

Montana is an equitable distribution state that permits only no-fault divorce, so neither spouse pleads wrongdoing. It is one of only three states, with Delaware and Hawaii, that use the Melson formula for child support, which reserves a basic living amount for each parent before calculating support. Our record puts the waiting period at 20 days after filing and has a 90-day residency requirement. Attorney rates run $175 to $325 per hour, and a contested case $9,000 to $28,000.

What this section says about Montana's divorce grounds and property system is a characterisation this site carries rather than a finding. That is our own record rather than Montana's own law.

Key Fact

Montana is one of only three states that use the Melson child support formula, and the 20-day waiting period our record has for it is on the short end nationally.

Recent Development

Montana continues to use the Melson formula for child support and to allow only no-fault divorce. These established rules mean cases focus on dividing property and arranging parenting, while the Melson calculation accounts for each parent's basic needs before setting support.

Montana Divorce Quick Facts

State law, attorney rates, and procedural rules for Montana.

Property division system, in our record
Equitable Distribution (judicial discretion)
How alimony is decided, in our record
Judicial discretion
Child support formula, in our record
Melson Formula
Mandatory waiting period, in our record
20 days
Residency requirement, in our record
90 days
Mediation required, in our record
No
Equal parenting presumption, in our record
No
Fault divorce available, in our record
No
Collaborative divorce available
Yes, and our record says the same for all fifty states
Filing fee range
$200
Attorney hourly rates, our estimate
$175 - $325/hour
Filing fee last checked
Not independently verified

Where these Montana figures come from, since it is fair to ask. The court filing fee is the one we have gone back to, and even there we are recording what a fee schedule says rather than citing a document we have opened. Everything else on this page that is a cost or a length of time - attorney rates, the mediator's per-session rate, QDRO preparation, the uncontested and contested totals, the number of months a case takes - came into our data when the site was first built, and nobody has checked any of it against a published source since. Our own value distributions give the game away: attorney rates across all fifty states take seven distinct values at the low end, every one of them a multiple of 25, which is what a set of estimates looks like rather than fifty separate readings. We think they are in the right neighbourhood. We are not going to call them Montana averages. For a real number, a Montana family law attorney will quote you their own rate, and the clerk of court in your county will tell you the filing fee to the dollar.

The waiting period and the residency requirement in that table are in the same position, and they matter more, because a wrong number there is a filing in the wrong place rather than a bad estimate. Both came into our data at the original build and nobody here has read Montana's dissolution statute. Confirm both with the clerk of court in the county where you will file, and ask specifically whether the wait runs from the day you file or from a separation date, because states do it both ways and our records hold one number for both cases.

DCE State Score Breakdown

Our proprietary index ranks every state on cost, complexity, and timeline. Higher is more favorable.

Overall DCE State Score

68/ 100

On our own 0 to 100 scale, a score of 68 puts Montana in the band we call moderate, which runs 50 to 69. The cut points are ours, set when we built the score, and they compare Montana with no average.

Cost Score

29/ 40

The midpoint of the uncontested cost range we hold for Montana, against a national baseline of ours. A higher cost lowers the score.

Complexity Score

24/ 30

Lowered by a longer waiting period, a longer residency requirement, a mediation requirement, a discretionary approach to alimony and more judicial discretion over custody, and raised by an equal-parenting presumption and collaborative divorce being available, each as we hold it for Montana.

Timeline Score

15/ 30

Based on our own contested duration estimate for Montana and the uncontested duration our pages show for it, which is never below its waiting period, each against a national baseline of ours. A longer case lowers the score.

Divorce Calculators for Montana

All 15 calculators preconfigured for Montana.

Montana Divorce Laws Overview

Property Division

Our record has Montana as an equitable distribution state. That is our own record rather than Montana's own property division law. Equitable does not mean equal, it means fair, based on the circumstances. Judges consider factors including each spouse's income and earning capacity, contributions to the marriage, length of the marriage, and the economic circumstances of each spouse. Outcomes can vary significantly from case to case.

Spousal Support (Alimony)

Montana judges have broad discretion in setting alimony awards, and our record carries no statutory formula for the state. The factors it lists are: length of the marriage, standard of living during the marriage, each spouse's earning capacity, financial resources of each spouse. Those came into our data at the original build rather than from a reading of the statute. Some of Montana's own law has been opened here - MCA 40-4-203(1) - and that reading covers the threshold in MCA 40-4-203(1) and not the factors in subsection (2), and this calculator collects neither the property nor the earning capacity it turns on, so it settles neither the factor list nor the absence of a formula. Outcomes can vary significantly depending on the judge and the specific facts of your case.

Child Support

Our record puts Montana among the Melson Formula states, and that classification is our record's and has not been checked against the Montana documents this site holds. That model first reserves a basic self-support amount for each parent before calculating the child's share of the remaining income, which results in lower payments for lower-income parents compared to other models. Here is what this site has on file for Montana's child support law. Montana CSSD policy bulletin CS 404.2 - read from the official copy at dphhs.mt.gov, on July 28, 2026. It is an agency publication carrying the figures, not a statute or a court rule. No Montana child support figure on this site is computed from what it holds for Montana.

Custody and Parenting Time

Montana courts determine custody on the best interests of the child. Our record carries no presumption of equal parenting time for the state and puts judicial discretion here in the middle of its three-point scale. That is our own record rather than Montana's own custody law. Courts generally favor arrangements that allow both parents meaningful involvement in the child's life.

This estimate is for planning purposes only and does not constitute legal or financial advice. Consult a licensed family law attorney in your state for guidance specific to your situation.

Frequently Asked Questions

How much does a divorce cost in Montana?
Our working estimate is $1,500 - $3,500 for an uncontested Montana divorce and $9,000 - $28,000 for a contested one, with the spread depending on attorney involvement, custody disputes, and the complexity of the marital estate. Court filing fees alone are $200. Both totals are ours rather than measured averages: they came into our data when this site was built and no survey stands behind them.
How long does a divorce take in Montana?
Our records put Montana's mandatory wait at 20 days, an uncontested case at roughly 3 months, and a contested one at about 10. Treat all three as ours rather than as findings: we have not read Montana's dissolution statute or its court caseload statistics. The clerk of court in the county where you will file can confirm the wait, and whether it runs from filing or from a separation date, which differs by state.
How is property divided in Montana?
Our record has Montana as an equitable distribution state. That is our own record rather than Montana's own property division law. Equitable does not mean equal, it means fair, based on the circumstances. Judges consider factors including each spouse's income and earning capacity, contributions to the marriage, length of the marriage, and the economic circumstances of each spouse. Outcomes can vary significantly from case to case.
How is child support calculated in Montana?
Our record puts Montana among the Melson Formula states, and that classification is our record's and has not been checked against the Montana documents this site holds. That model first reserves a basic self-support amount for each parent before calculating the child's share of the remaining income, which results in lower payments for lower-income parents compared to other models. Here is what this site has on file for Montana's child support law. Montana CSSD policy bulletin CS 404.2 - read from the official copy at dphhs.mt.gov, on July 28, 2026. It is an agency publication carrying the figures, not a statute or a court rule. No Montana child support figure on this site is computed from what it holds for Montana.
How is alimony determined in Montana?
Montana judges have broad discretion in setting alimony awards, and our record carries no statutory formula for the state. The factors it lists are: length of the marriage, standard of living during the marriage, each spouse's earning capacity, financial resources of each spouse. Those came into our data at the original build rather than from a reading of the statute. Some of Montana's own law has been opened here - MCA 40-4-203(1) - and that reading covers the threshold in MCA 40-4-203(1) and not the factors in subsection (2), and this calculator collects neither the property nor the earning capacity it turns on, so it settles neither the factor list nor the absence of a formula. Outcomes can vary significantly depending on the judge and the specific facts of your case.

Divorce Costs in Nearby States

See all 50 states for complete cost breakdowns and calculators.