Montana is no-fault. The court focuses on whether the marriage is irretrievably broken.
An irretrievable breakdown can be shown by the spouses’ agreement, by living separate and apart for 180 days, or by serious marital discord that adversely affects the attitude of one or both spouses toward the marriage.
Montana does not require or recognize separate fault grounds for dissolution. Conduct may be considered among many factors when allocating property or maintenance, but it is not a prerequisite for ending the marriage.
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Do I have to prove fault in Montana?
No. Montana is no-fault; you establish irretrievable breakdown.
What shows irretrievable breakdown?
Agreement, 180 days apart, or serious marital discord.
Does fault affect outcomes?
Conduct can be one of several equitable factors, but finances and children’s needs usually drive results.