Possession and use
For adults 21 and over, the MRTMA protects up to 2.5 ounces outside the home, with at most 15 grams in concentrate. At home, the statute permits up to ten ounces plus the harvest from lawful home plants, with storage requirements. Public consumption and driving under the influence are not authorized.
The Michigan courts' statutory summary gives an additional 15-gram ceiling for concentrate within the 2.5-ounce amount outside home. At home, the ten-ounce limit excludes cannabis produced by legally cultivated plants on the premises. These distinctions make a single weight figure inadequate for concentrates and home harvest.
Medical access
Michigan's medical program is separate from adult-use retail. The Cannabis Regulatory Agency says licensed provisioning centers may sell to a visiting qualifying patient who presents a valid, unexpired medical marijuana card or equivalent from another U.S. jurisdiction and a government-issued photo ID. The center must check the applicable purchase limit and provide tested, labeled product. A visiting patient should confirm that a chosen shop operates a medical provisioning center; adults 21 or older also have a separate adult-use route.
Registered Michigan patients may obtain medical cannabis from licensed provisioning centers or through the patient-caregiver arrangement under state rules. The visitor purchase allowance does not authorize crossing state lines with cannabis.
Home cultivation
Adults 21 and older may cultivate up to 12 plants on the premises of their residence. The Michigan courts' statute summary states the 12-plant ceiling applies to the premises, not separately to each adult. Keep plants and home harvest within the statutory storage conditions.
Buying legally
Purchase through a state-licensed adult-use retailer or, if eligible, a medical provisioning center. Municipalities may bar commercial marijuana businesses, so a legal statewide market does not mean a store is available in every town. The retailer should verify age and medical credentials as applicable.
Taxes
At retail, Michigan Treasury lists a 10% adult-use excise plus 6% sales tax. A 24% wholesale tax began January 1, 2026, at an earlier supply-chain transaction; it is not an additional percentage separately charged as retail tax at checkout. Medical sales remain outside the adult-use excise.
Michigan Treasury says the 2026 wholesale tax applies to the first qualifying transfer to a retailer and certain transfers from medical to adult-use inventory. It applies upstream even when a retailer later charges the 10% adult-use excise and 6% state sales tax. Avoid adding 24, 10 and 6 into a claimed consumer tax rate.
Travel and transport
Michigan's state-law allowance does not authorize carrying marijuana across a state or international border. Keep cannabis off federal property, do not consume in public, and do not drive impaired. A medical card does not change federal border restrictions.
Sources and remaining checks
We checked the sources below on the date shown above. Rules may have changed since then. Check the current rules before making a decision, and read the remaining questions noted in this guide.
- Michigan Cannabis Regulatory Agency MRTMA overview. 21+ personal possession and 12-plant allowance.
- Michigan courts MRTMA benchbook. Statutory detail: 15g concentrate, 10oz at home.
- Michigan CRA medical patient FAQ. Medical patient cultivation and sales.
- Michigan Treasury cannabis excise tax. Retail 10% excise and 6% sales; separate 2026 wholesale tax.
- Michigan Treasury wholesale marijuana tax FAQ. 2026 24% wholesale tax, distinct from retail checkout taxes.
- Michigan Cannabis Regulatory Agency visiting-patient sales FAQ. Current CRA answer directly checked October 23, 2026; confirms medical purchase with foreign card and photo ID.
No professional legal review is claimed. Check official sources and the verification notes below.