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Manslaughter Laws in Montana

How Montana law treats manslaughter (voluntary, involuntary, vehicular): what is illegal, whether it is a misdemeanor or felony, and the penalties, from the state code.

Short answer: Montana has no offense called manslaughter. Negligent homicide (negligently causing a death) carries up to 20 years in state prison and/or a fine up to $50,000. MCA 45-5-104, 45-5-106, 45-5-103

Manslaughter (voluntary, involuntary, vehicular)Montana has no offense called manslaughter. Negligent homicide (negligently causing a death) carries up to 20 years in state prison and/or a fine up to $50,000. Vehicular homicide while under the influence (negligently causing a death while driving under the influence of alcohol or drugs) carries up to 30 years and/or a fine up to $50,000, the sentence may not be deferred, and restitution is required if the victim had a minor child. The killing done under extreme emotional stress is mitigated deliberate homicide (2 to 40 years).
Vehicular homicide: https://mca.legmt.gov/bills/mca/title_0450/chapter_0050/part_0010/section_0060/0450-0050-0010-0060.html (amended 2025)

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FAQ

What is the sentence for manslaughter in Montana?
Montana has no offense called manslaughter. Negligent homicide (negligently causing a death) carries up to 20 years in state prison and/or a fine up to $50,000. Vehicular homicide while under the influence (negligently causing a death while driving under the influence of alcohol or drugs) carries up to 30 years and/or a fine up to $50,000, the sentence may not be deferred, and restitution is required if the victim had a minor child. The killing done under extreme emotional stress is mitigated deliberate homicide (2 to 40 years).
Can I get a court-appointed lawyer for manslaughter (voluntary, involuntary, vehicular) in Montana?
Montana's rule on court-appointed lawyers: The Office of State Public Defender assigns counsel to eligible applicants; eligibility determinations are subject to the review and approval of the court. An applicant is indigent if 'the applicant's gross household income is at or less than 133% of the poverty level' (federal poverty guidelines) or if disposable income and assets are 'insufficient to retain competent private counsel without substantial hardship to the applicant.' The applicant must provide a detailed financial statement and sign an affidavit on a prescribed form; false statements may be prosecuted. The section does not set an application fee. MCA § 47-1-111
How much does a lawyer for manslaughter (voluntary, involuntary, vehicular) cost in Montana?
Lawyers set their own fees, and Montana has rules on how they may charge. See hiring a criminal defense lawyer in Montana for fee rules, how to check a lawyer's license and free help.
What happens after an arrest for manslaughter (voluntary, involuntary, vehicular) in Montana?
How release before trial works in Montana: Before a verdict, the court must either authorize release 'upon reasonable conditions that ensure the appearance of the defendant' and protect the safety of the community or any person, or detain the defendant when there is probable cause to believe the defendant committed an offense for which death is a possible punishment and adequate safeguards are unavailable (§ 46-9-106). The amount of bail must be sufficient to ensure the defendant's presence and compliance with bail conditions and to protect any person from bodily injury; 'not oppressive'; commensurate with the nature of the offense; and considerate of the financial ability of the accused, prior record, history of abscondence, length of residence and community ties, family ties, mental health status and treatment, and employment status (§ 46-9-301). MCA §§ 46-9-106, 46-9-301 What happens after an arrest.
Can a conviction for manslaughter (voluntary, involuntary, vehicular) be removed from my record in Montana?
Each state sets its own rules for sealing or expunging records. See Montana expungement and record sealing rules.

General legal information, not legal advice. Laws change and local rules can differ; check the linked official source or talk to a lawyer about your situation.