Turning Eighteen
Mo. Rev. Stat. § 431.055 — competent to contract at eighteen
Contracts. The legal age at which a person becomes competent to contract in Missouri is eighteen years, and any contrary common law rule is abrogated.
Ages set for specific purposes elsewhere, such as buying alcohol or tobacco and some licenses and permits, are not on this page. How a particular age rule applies to a particular person is a question for a licensed Missouri attorney.
Sources for this section (1)
- Mo. Rev. Stat. § 431.055 — Persons competent to contract when eighteen years of age
Legal information, not legal advice. Verified as of October 2026. Applying it to a particular situation is the work of a licensed Missouri attorney.