Missouri
Missouri state laws, regulations, court decisions, and active legislation
Overview
Missouri's legal system serves a geographically and politically diverse state that includes two major urban centers (St. Louis and Kansas City), suburban areas, and vast rural regions. The state legalized recreational marijuana through a 2022 constitutional amendment that included automatic expungement provisions for prior convictions. Missouri has been active in Second Amendment litigation, including the controversial Second Amendment Preservation Act.
Missouri's legal framework is generally conservative, with permitless carry, no state assault weapons ban, and strong self-defense protections. The state's location at the center of the country makes it a bellwether for national legal trends.
Court Structure
Missouri's court system includes municipal courts, associate circuit courts, circuit courts (organized into 46 judicial circuits), the Court of Appeals (three districts: Eastern, Western, and Southern), and the Missouri Supreme Court. In St. Louis and Kansas City, appellate and Supreme Court judges are selected through the Missouri Plan (nonpartisan court plan) — the original merit-based selection system adopted in 1940 that has been replicated nationwide.
Unique Laws & Facts
- •Missouri pioneered the merit-based judicial selection system (Missouri Plan, 1940)
- •The Second Amendment Preservation Act attempted to nullify federal gun laws (enjoined by courts)
- •Missouri's recreational marijuana amendment includes automatic expungement provisions
- •The state is one of few that allow constitutional carry at age 19
- •Missouri's castle doctrine covers homes, vehicles, and places of business
Legal Landscape
Missouri's legal landscape reflects its centrist-to-conservative orientation with strong Second Amendment protections, a new recreational cannabis market, and the influential Missouri Plan for judicial selection. The state's legal system navigates significant urban-rural divides, particularly between St. Louis/Kansas City and the rest of the state.
Key Missouri Laws (22)
Driving While Intoxicated
Missouri DWI law forbids driving with a BAC of 0.08% or higher, or while otherwise impaired. First offense is a misdemeanor (up to 6 months, $1,000). Third offense becomes a felony with up to 4 years prison; fifth offense brings up to 10 years with mandatory 2 years prison.
Permitless Carry and Second Amendment Preservation Act
Missouri allows permitless concealed carry for those 19+. The state attempted to invalidate federal gun laws through SAPA, though courts have enjoined this. No assault weapon bans, magazine limits, waiting periods, or universal background checks. Strong self-defense protections apply.
Recreational Marijuana Legalization (Amendment 3)
Missouri legalized recreational marijuana in 2022 for adults 21+. Possession up to 3 ounces, home cultivation of 6 plants with license. 6% excise tax. Comprehensive automatic expungement of prior offenses. Municipalities may zone but not ban cannabis businesses.
Assault in the Fourth Degree
Missouri grades assault in four degrees. Fourth-degree (most common) is a Class A misdemeanor (up to 1 year, $2,000). Third-degree is a Class E felony (up to 4 years). Second-degree is Class D (up to 7 years). First-degree assault can be Class B or A felony (up to 30 years).
Domestic Assault
Missouri lacks a separate battery offense — physical violence falls under assault statutes. Domestic assault mirrors the four-degree structure with enhanced penalties: fourth-degree is a Class A misdemeanor first offense, but Class E felony on second offense.
Possession of Controlled Substances
Missouri legalized recreational marijuana in 2022 (up to 3 oz for adults 21+). Possession of harder drugs like cocaine and heroin is a Class D felony with up to 7 years prison. Trafficking carries enhanced felony penalties. Drug court diversion is available for many first offenders.
Stealing
Missouri uses 'stealing' instead of theft. Stealing under $750 is a misdemeanor; $750-$24,999 is a Class D felony (up to 7 years); $75,000+ is a Class B felony (5-15 years). Stealing firearms, vehicles, livestock, or controlled substances is enhanced regardless of value.
Dissolution of Marriage
Missouri is a no-fault divorce state requiring only that the marriage be irretrievably broken. One spouse must reside in Missouri 90 days before filing. A 30-day waiting period applies. Property is divided equitably. Legal separation is also available.
Child Custody Determination
Missouri custody decisions favor frequent contact with both parents and joint legal/physical custody when appropriate. Courts evaluate 8 factors including parental cooperation, child's needs, parental fitness, relocation intent, and the child's wishes. Domestic abuse can override the joint-custody preference.
Child Support Guidelines
Missouri calculates child support using Form 14 income-shares guidelines. Notably, Missouri extends support to age 21 for children in college or vocational school meeting certain conditions — one of few states to do so. Modifications require a 20%+ change. Failure to pay can lead to license suspension.
State Minimum Wage
Missouri's minimum wage is $13.75/hour (2025), rising to $15.00 in 2026 then adjusted annually. Tipped workers earn 50% of minimum ($6.875 in 2025) plus tips. Public employers are exempt from state minimum wage (federal applies). Voter-approved increases drove the changes.
At-Will Employment Doctrine
Missouri is at-will, with public policy exceptions for refusing illegal acts, filing workers' comp claims, and whistleblowing. The Missouri Human Rights Act bars discrimination by race, sex, age, disability, etc. — but 2017 amendments made claims harder to prove (motivating factor test).
Earned Paid Sick Time
Missouri voters approved Proposition A in November 2024, creating earned paid sick time effective May 2025. Workers accrue 1 hour per 30 worked, up to 56 hours/year (15+ employees) or 40 hours (smaller). Eligible to use after 90 days. Used for illness or domestic violence.
Security Deposits
Missouri caps residential security deposits at two months' rent. Landlords must return deposits with itemized lists within 30 days of vacancy. Failure exposes landlords to double the wrongfully withheld amount plus attorney's fees. Tenants are entitled to be present at inspections.
Rent and Possession Action
Missouri uniquely allows landlords to file Rent and Possession actions for nonpayment without prior notice. Court hearings happen within 4-15 days. Tenants can typically pay rent plus costs to avoid eviction. Self-help evictions like lockouts are illegal.
Articles of Organization
Missouri LLCs are formed by filing Articles of Organization for $50 (online) or $105 (mail). Notably, Missouri does NOT require annual reports or annual fees — making it attractive for ongoing LLC maintenance. The name must include 'LLC' or similar designation.
Merchandising Practices Act
Missouri's Merchandising Practices Act bars deceptive sales practices broadly. The Attorney General can seek penalties up to $1,000 per violation. Consumers may sue for actual damages plus attorney's fees and punitive damages. 2020 amendments tightened pleading requirements. Class actions permitted.
Missouri Lemon Law
Missouri's Lemon Law covers new vehicles under 12,000 lbs with unfixable defects within 1 year or warranty period. After 4 repair attempts or 30 business days out of service, consumers can demand a replacement or refund. Excludes motorcycles, RVs, and used vehicles.
Distribution Without a Will
Without a will in Missouri, a spouse with no kids inherits everything. With shared kids, the spouse gets $20,000 plus half. With stepchildren, the spouse gets only half (no $20K preference). Without a spouse, descendants inherit. Without heirs, property escheats to the school fund.
Execution of Wills
Missouri wills must be written, signed by the testator, and witnessed by two competent witnesses. Holographic wills generally aren't valid in Missouri. Self-proving wills with notarized affidavits speed up probate. Electronic wills are now permitted under specific conditions (2024).
Maximum Speed Limits
Missouri's default speed limits are 70 mph on rural interstates, 60-65 mph on urban interstates, 55-65 mph on other highways, 30 mph in urban areas, and 25 mph in residential. Construction zone fines double when workers are present. Excessive speeding (25+ mph over) may be a misdemeanor.
Small Claims Court Jurisdiction
Missouri small claims handles disputes up to $5,000 with simplified rules so parties can represent themselves. Filing fees are $20-$40. Hearings happen within 30-60 days. Either party can transfer to associate circuit court or appeal within 10 days for de novo review.
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This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.