You cannot claim medical marijuana on your taxes at the federal level, even if you live in a state with a legal medical cannabis program and hold a valid patient card. The IRS treats marijuana as a controlled substance that is illegal under federal law, which disqualifies it from the medical expense deduction and from payment through tax-advantaged health accounts.1Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses A narrow set of FDA-approved cannabis-derived prescription drugs is the exception.
Why the Federal Deduction Is Off the Table
Marijuana sits on Schedule I of the Controlled Substances Act, the classification reserved for substances the federal government considers to have no accepted medical use.2Office of the Law Revision Counsel. 21 USC 812 – Schedules of Controlled Substances State legalization does not change how federal tax law treats it. IRS Publication 502 states directly: “You can’t include in medical expenses amounts you pay for controlled substances (such as marijuana) that aren’t legal under federal law, even if such substances are legalized by state law.”1Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses
Two independent barriers reinforce this. First, the tax code limits deductible medicines to “prescribed drugs” and insulin, and a prescribed drug is one that requires a physician’s prescription.3Office of the Law Revision Counsel. 26 USC 213 – Medical, Dental, Etc., Expenses Because of the Schedule I status, physicians cannot write prescriptions for marijuana. State programs issue recommendations or certifications, which do not meet the federal definition. Second, the Treasury regulation implementing the medical expense deduction excludes amounts spent on illegal operations or treatments.4eCFR. 26 CFR 1.213-1 – Medical, Dental, Etc., Expenses
The exclusion is broad. It covers the cannabis itself, dispensary purchases, cultivation supplies, physician evaluations tied to obtaining a recommendation, and state medical card fees. Holding a valid card does not change the analysis.
HSA, FSA, and HRA Funds Cannot Pay for It Either
Health Savings Accounts, Flexible Spending Accounts, and Health Reimbursement Arrangements all rely on the same federal definition of a qualifying medical expense. Because marijuana is excluded from that definition, you cannot use any of these accounts to pay for it.1Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses
If you do, the money comes out as a non-qualified distribution. From an HSA, that means income tax on the amount plus a 20% penalty if you are under 65. From an FSA, the distribution loses its tax-free status and can create problems with your plan administrator.
Cannabis Medications That Do Qualify
Not every cannabis-derived product is treated the same way. The FDA has approved several prescription drugs related to the cannabis plant, and because these are federally legal and require a physician’s prescription, they qualify for the medical expense deduction like any other prescription medication.5U.S. Food and Drug Administration. FDA and Cannabis – Research and Drug Approval Process
- Epidiolex, a cannabidiol product derived from the cannabis plant, approved for seizures associated with Lennox-Gastaut syndrome and Dravet syndrome.
- Marinol and Syndros, both containing synthetic THC (dronabinol), prescribed for chemotherapy-related nausea and AIDS-related anorexia.
- Cesamet, containing synthetic nabilone, indicated for chemotherapy-related nausea.
All four meet the “prescribed drug” standard under the tax code.3Office of the Law Revision Counsel. 26 USC 213 – Medical, Dental, Etc., Expenses If your condition is one these drugs treat, ask your provider whether a prescription option could replace a dispensary product. The tax treatment is very different, and so is the cost picture once insurance and the deduction are factored in.
Keep in mind that even for qualifying expenses, the medical expense deduction only applies to unreimbursed costs above 7.5% of your adjusted gross income, and only if you itemize on Schedule A.1Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses
What Happens If You Deduct It Anyway
Some taxpayers claim marijuana expenses hoping the IRS will not catch it, or on the theory that state legality offers some cover. It does not. The IRS can assess an accuracy-related penalty of 20% on the portion of any underpayment caused by negligence or disregard of the rules.6Internal Revenue Service. Accuracy-Related Penalty Claiming a deduction the IRS has explicitly denied in writing fits that description.
You would also owe the tax itself and interest from the original due date. If the IRS treats the claim as intentional rather than careless, the civil fraud penalty jumps to 75%. The savings a deduction might have produced are easily wiped out.
State Returns May Treat It Differently
State income tax codes do not always track federal law. Some states that legalized medical cannabis have decoupled parts of their tax code from federal restrictions, and whether individuals can deduct medical marijuana as a personal medical expense depends on how that state defines a qualifying expense. The rules vary and change often.
If your state has a medical program, check with a tax professional familiar with its rules. A state deduction, where available, reduces only your state tax and has no effect on your federal return. Keep dispensary receipts, physician evaluation invoices, and card fee records in case the state side allows what the federal side does not.
Will Rescheduling Change the Answer?
The federal government has moved toward reclassifying marijuana. The Department of Health and Human Services recommended in 2023 that marijuana move from Schedule I to Schedule III, and the Department of Justice issued a proposed rescheduling rule in May 2024 that drew nearly 43,000 public comments. As of December 2025, the rule was still awaiting an administrative law hearing. A December 2025 executive order directed the Attorney General to complete the rulemaking “in the most expeditious manner” allowed by federal law.7The White House. Increasing Medical Marijuana and Cannabidiol Research
Even a move to Schedule III would not automatically make dispensary marijuana deductible. It would remove the “illegal substance” barrier, but the “prescribed drug” requirement would still stand. State programs that issue recommendations rather than prescriptions would not satisfy it. Unless prescribing practices change or Congress amends the tax code, the deduction answer could stay the same even after rescheduling. Watch the process, but do not file a return based on it.