Massachusetts marijuana laws let adults 21 and older possess, use, grow, and buy cannabis under a system run by the Cannabis Control Commission. As of April 19, 2026, you can carry up to two ounces of flower in public, keep up to ten ounces at home, and grow up to six plants per adult.1General Court of Massachusetts. Acts of 2026 Chapter 65 The state licenses retail dispensaries, taxes recreational sales, and restricts consumption to private spaces. Federal law hasn’t changed, though, and that gap creates real problems around jobs, guns, and travel that state legalization does not solve.
How Much You Can Possess
Outside your home, the limit is two ounces of marijuana flower or an equivalent amount of marijuana products.1General Court of Massachusetts. Acts of 2026 Chapter 65 The 2026 amendment replaced the old one-ounce flower limit and five-gram concentrate cap with the flat two-ounce standard, and directed the Cannabis Control Commission to set equivalents for concentrates and other product types.
At home, you can keep up to ten ounces plus whatever your plants produce.2General Court of Massachusetts. Massachusetts General Laws Chapter 94G Section 7 – Personal Use of Marijuana Anything above one ounce must be stored in a locked container or locked space.3Cannabis Control Commission Massachusetts. Know the Laws Eight ounces in an unlocked kitchen drawer is a violation even though the amount itself is legal.
Carrying between two and four ounces outside your home is a civil offense punishable by up to $100 and forfeiture of the excess. No arrest, no criminal record.4General Court of Massachusetts. Massachusetts General Laws Chapter 94G Section 13 – Penalties Amounts well beyond personal use fall under the state’s drug distribution statutes, and the consequences escalate sharply.
You can give marijuana to another adult 21 or older, up to two ounces, as long as no money or other value changes hands and the transfer isn’t advertised.1General Court of Massachusetts. Acts of 2026 Chapter 65 Some businesses have tried to sell a T-shirt or sticker and toss in marijuana as a free gift. Those transactions get treated as unlicensed sales.
Growing Marijuana at Home
You can cultivate up to six marijuana plants in your primary residence. If two or more adults 21 and older live in the household, the cap is twelve plants for the whole property, not twelve per person.2General Court of Massachusetts. Massachusetts General Laws Chapter 94G Section 7 – Personal Use of Marijuana The Cannabis Control Commission advises staggering your harvest so no more than six plants are flowering at any one time.5Cannabis Control Commission Massachusetts. Home Cultivation
Plants can’t be visible to anyone passing by with the naked eye. A closet, basement, or enclosed backyard structure works; an open porch does not. Breaking the visibility or storage rules draws a civil fine of up to $300 and forfeiture of the plants.5Cannabis Control Commission Massachusetts. Home Cultivation A single adult growing seven to twelve plants faces a lesser $100 civil penalty and loses the extra plants.4General Court of Massachusetts. Massachusetts General Laws Chapter 94G Section 13 – Penalties
Where You Can Consume
Consumption is legal only in private spaces. You can’t smoke, vape, or eat edibles on sidewalks, in parks, at public events, or anywhere tobacco smoking is prohibited. Public consumption carries a civil fine of up to $100.4General Court of Massachusetts. Massachusetts General Laws Chapter 94G Section 13 – Penalties
Landlords and property owners can ban marijuana use on their premises. Many leases specifically prohibit cannabis products, and violating those terms can trigger eviction. If your lease says nothing about marijuana, you’re generally fine consuming in your rental, but read it before assuming.
Cannabis cafes and other social consumption venues have been discussed for years. The Cannabis Control Commission approved draft social consumption regulations in July 2025, but as of that vote the rules were still moving through public comment and final approval before any licenses could be issued.6Cannabis Control Commission Massachusetts. Cannabis Control Commission Approves Draft Social Consumption Regulations Until licensed venues open, private property is your only legal option.
Buying From a Dispensary
Every licensed dispensary requires a government-issued photo ID showing you’re at least 21. Staff will walk you through products and hand everything over in child-resistant packaging.
Three taxes stack on recreational purchases:
- State sales tax of 6.25%
- Marijuana excise tax of 10.75%
- Local option tax of up to 3%, set by the municipality
Combined, you’re looking at close to 20% in taxes on every purchase. Because marijuana is still federally illegal, most banks won’t work with cannabis businesses, so dispensaries generally operate on cash or through cashless ATMs on the premises.
A seed-to-sale tracking system monitors every transaction across licensed retailers. Daily purchase limits track the possession limits, so staff will stop a transaction that would push you over.p>
Medical Cardholders Get Different Rules
Massachusetts runs a separate Medical Use of Marijuana Program, and the differences matter. Medical patients are exempt from the 10.75% excise tax and the 6.25% state sales tax, roughly 17% off before the local option tax. Cardholders can buy up to ten ounces over a 60-day period, well beyond recreational limits. Patients under 21 can access medical marijuana through a registered personal caregiver; recreational use requires you to be 21.
Marijuana in Your Car
Any marijuana in the vehicle must be in a sealed, unopened package or stored in the trunk, a locked glove compartment, or another area not accessible from the passenger seats. An “open container” means the manufacturer’s seal is broken or the contents partially used. An open container in the passenger area is a civil violation with a fine of up to $500.4General Court of Massachusetts. Massachusetts General Laws Chapter 94G Section 13 – Penalties If your vehicle has no trunk, stow it behind the last row of seats or somewhere out of arm’s reach.
Driving under the influence of marijuana is a criminal offense, not a civil ticket. A first OUI conviction carries a fine between $500 and $5,000, up to two and a half years in jail, and a license suspension.7Mass.gov. Massachusetts General Laws c.90 Section 24 – Driving While Under Influence There is no reliable roadside cannabis equivalent to the alcohol breathalyzer. Officers use field sobriety tests originally designed for alcohol and, if they suspect impairment, bring you in for evaluation by a Drug Recognition Expert. The absence of a chemical test isn’t protection; prosecutors secure convictions on behavioral evidence and officer observations.
Your Employer Can Still Fire You
Legalization did not make it illegal for your employer to fire you over a positive drug test. Private employers can maintain drug-free workplace policies, test for cannabis, and take adverse action based on results. State law is not a defense if you fail a workplace drug screen for recreational use.
Medical cardholders have slightly more protection. In Barbuto v. Advantage Sales and Marketing, the Massachusetts Supreme Judicial Court held that employers must engage in an interactive process with a medical patient before terminating them for off-duty marijuana use, exploring whether an equally effective alternative medication exists or whether the accommodation would pose an undue hardship.8Justia Law. Barbuto v. Advantage Sales and Marketing, LLC Employers never have to tolerate on-the-job use, and safety-sensitive positions give employers a strong argument for refusing the accommodation.
Federal contractors face stricter rules. The Drug-Free Workplace Act of 1988 requires contractors holding federal grants or procurement contracts to maintain anti-drug policies. An employee under a federal contract who tests positive can be terminated regardless of state law or medical card status.
Firearms and Federal Law
Federal law bars anyone who is an “unlawful user of or addicted to any controlled substance” from possessing a firearm or ammunition.9Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Marijuana is still Schedule I federally, so every marijuana user in Massachusetts, recreational or medical, is an unlawful user under federal law regardless of what the state allows.
When you buy a firearm from a licensed dealer, ATF Form 4473 asks whether you are an unlawful user of marijuana or any other controlled substance. Answering “yes” blocks the sale. Answering “no” when you do use marijuana is a federal felony punishable by up to ten years in prison. Under current federal rules, there is no safe way to be both a regular marijuana user and a lawful firearm purchaser.
Federal Land and Crossing State Lines
State legalization stops at the state border and does not reach federal property inside Massachusetts. National parks, military bases, and federal courthouses fall under federal jurisdiction, where marijuana remains illegal under the Controlled Substances Act. Possession on federal land can result in criminal prosecution regardless of the amount.
Taking marijuana across state lines is a federal offense even when both states have legalized cannabis. The federal government has jurisdiction over goods moving across state borders, so a legal product becomes federal contraband the moment you cross. The same applies to flying: TSA agents aren’t specifically hunting for marijuana, but if they find it, they must refer the matter to law enforcement.
Clearing an Old Marijuana Conviction
Massachusetts offers two paths to clean up an old conviction for conduct that’s now legal: expungement and pardon.
Expungement is available for convictions involving amounts that have been decriminalized, whether that’s simple possession of a now-legal quantity or a distribution charge stemming from possessing a legal amount. File a petition in the court that handled the original case and serve a copy on the District Attorney’s office. The court must act within 30 days. Expungement destroys the records entirely, unlike sealing, which only limits who can view them. One warning if you are not a U.S. citizen: consult an immigration attorney first, because a destroyed record can complicate your ability to prove the outcome of the case in future immigration proceedings.
In 2024, Governor Healey issued a blanket pardon covering all Massachusetts convictions for simple possession of marijuana that occurred before March 13, 2024. A pardon treats the offense as though it never happened, but does not automatically destroy court records. If you qualify for both, the pardon may already cover you, and expungement then ensures the underlying records are gone.