Getting married in Montana? A prenuptial agreement lets you set clear expectations about property, debt, and (where allowed) support—so you’re not relying only on default state rules.
Key points
- Prenups are recognized if they’re voluntary, in writing, and signed by both partners.
- Unenforceable if not voluntary, if unconscionable when executed, or if there was inadequate disclosure without a valid waiver.
- Montana follows the Uniform Premarital Agreement Act. Agreements must be in writing and signed by both parties before marriage.
Are prenups legal in Montana?
Montana follows the Uniform Premarital Agreement Act. Agreements must be in writing and signed by both parties before marriage. No notarization requirement, but it is recommended. Full disclosure or written waiver is necessary.
What makes a Montana prenup enforceable?
Unenforceable if not voluntary, if unconscionable when executed, or if there was inadequate disclosure without a valid waiver. No “second look” at divorce — fairness is assessed at signing.
What you can—and can’t—include
May waive property rights, alimony, and inheritance. Child-related provisions are void.
Simple process
Provide detailed disclosures, sign early, and consider notarization. Independent counsel is not required but is recommended.
Next steps
General information only, not legal advice. Laws and cases change—consider speaking with a local attorney about your situation.
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