Cannabis Laws in Michigan

Not legal advice

This article is informational only and is not legal advice. Cannabis laws change frequently, and how a law applies to your specific situation depends on facts a general article can't know. If you're facing a legal issue, consult a licensed Michigan attorney. Information last verified June 2024.

How Michigan got here

Michigan voters approved medical cannabis in 2008 with the Michigan Medical Marihuana Act (MMMA), which allowed registered patients and caregivers to possess and grow limited amounts ^[1]. A decade later, in November 2018, voters passed Proposal 1 — the Michigan Regulation and Taxation of Marihuana Act (MRTMA) — by roughly 56% to 44%, making Michigan the first Midwestern state to legalize adult-use cannabis ^[2]. The law took effect December 6, 2018, with licensed retail sales beginning December 1, 2019 ^[3].

Regulation was initially split between agencies but was consolidated under the Cannabis Regulatory Agency (CRA) in 2022, which now oversees both medical and adult-use licensing ^[4]. (Note: Michigan statutes still use the spelling "marihuana," a historical artifact from federal language; it means the same thing as marijuana.)

What adults 21+ can legally do

Under MRTMA, adults 21 and older can:

• Possess up to 2.5 ounces of cannabis in public, of which no more than 15 grams may be concentrate ^[5].
• Store up to 10 ounces at their private residence. Any amount over 2.5 ounces kept at home must be stored in a locked container ^[5].
• Grow up to 12 plants per household (not per person) for personal use, out of public view, in a locked area ^[5].
• Gift up to 2.5 ounces to another adult 21+, as long as no money or services are exchanged ^[5]. Sales without a license remain illegal.
• Consume on private property, subject to the property owner's rules. Public consumption is prohibited.

Driving under the influence of cannabis is illegal. Michigan does not have a per-se THC blood limit for adults (unlike alcohol's 0.08% BAC), so prosecution is based on observed impairment ^[6]. For drivers under 21, any detectable THC is a violation.

Medical cannabis

The medical program still exists and offers some advantages over adult-use: lower taxes (no 10% excise tax for registered patients), higher possession allowances, and access for patients aged 18+ (or younger with a parent/guardian caregiver) ^[7]. Patients register through the CRA, need a physician certification for a qualifying condition (cancer, chronic pain, PTSD, epilepsy, and others), and pay an application fee.

Registered patients can possess up to 2.5 ounces of usable cannabis and cultivate 12 plants. Designated caregivers can serve up to five patients and grow on their behalf, though the caregiver system has been politically contested and rule changes have continued through the 2020s ^[4].

Where you can and can't buy

MRTMA explicitly lets municipalities opt out of allowing recreational cannabis businesses, and many have. As of 2024, hundreds of Michigan cities, villages, and townships have banned adult-use establishments, which is why retail is concentrated in places like Ann Arbor, Detroit, Lansing, Kalamazoo, and border towns near Indiana and Ohio ^[8]. Opting out does not make possession or home growing illegal for adults — it only bans commercial operations.

The state market is notable for being oversupplied: wholesale flower prices crashed from around $4,000/lb in 2020 to under $1,000/lb by 2023, among the lowest in any legal state ^[9]. That has been good for consumers and brutal for many cultivators.

Taxes, employment, and federal conflict

Taxes. Adult-use sales carry a 10% excise tax plus Michigan's 6% sales tax. Medical sales pay only the 6% sales tax. Excise revenue is distributed to municipalities that host dispensaries, the School Aid Fund, and the Michigan Transportation Fund ^[10].

Employment. MRTMA does not broadly protect cannabis users from being fired or refused a job. Employers can maintain drug-free workplace policies and test for cannabis ^[5]. A 2023 state law did limit pre-employment THC testing for many state government jobs, but private employers retain wide latitude ^[11].

Federal law. Cannabis remains a Schedule I controlled substance under the federal Controlled Substances Act ^[12]. That means: no flying internationally with cannabis, problems with federally subsidized housing, restrictions on firearm purchases (the ATF Form 4473 question), and immigration consequences for non-citizens. The DEA in 2024 began a process to reschedule cannabis to Schedule III, but as of the verification date that change has not been finalized ^[13].

Penalties if you go over the limits

Penalties scale with amount and intent:

• Possessing slightly over 2.5 oz but under 5 oz in public is a civil infraction with a $500 fine for a first offense ^[5].
• Larger amounts, sales without a license, or sales to minors can be misdemeanors or felonies depending on quantity and circumstance.
• Driving while impaired by cannabis is a misdemeanor for a first offense, with escalating penalties for repeat offenses or injury.
• Underage possession (under 21) is a civil infraction for small amounts, with fines and possible drug education.

Michigan also passed expungement reforms in 2021 (the "Clean Slate" laws) that automatically set aside many prior misdemeanor cannabis convictions ^[14].

Sources

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