Montana Medical Marijuana Card: Complete Guide
Montana Cannabis Tax & Purchasing Matrix
| Feature / Metric | Recreational Adult-Use | Registered Medical Patient |
|---|---|---|
| State Retail Excise Tax | 20% Added at Checkout | 4% Added at Checkout |
| Local-Option County Tax | Up to 3.0% Added | Up to 3.0% Added |
| Maximum Potential Tax Stack | 23.0% Total at Checkout | 7.0% Total at Checkout |
| Dispensary Availability | Limited to "Green Counties" Only | Statewide Access (Green & Red Counties) |
| Home Cultivation Plant Cap | Max 2 mature plants per household | Max 4 mature plants per patient |
| Minimum Purchase Age | 21+ | 18+ |
1-Year Financial Value Comparison (Based on a $200/month budget)
- Annual Recreational Tax Expenses (20% State Rate): ~$480
- Annual Medical Tax Expenses (4% State Rate): ~$96
- Program Setup Investment: $169.99 ($149.99 Evaluation Fee + $20.00 State Fee)
- Net Year-One Financial Savings: $214.01 Saved
2026 Product Change Patients Will Notice: House Bill 636
Effective July 1, 2026, HB 636 (signed May 8, 2025) caps a single serving of marijuana-infused ingestible products at 5 mg of delta-9 THC and a single package at 100 mg, with the existing plus-or-minus 10 percent deviation still allowed, per the Montana Department of Revenue Cannabis and Alcohol Regulation Division. This changes how edibles are dosed and packaged; it does not change the medical purchase allowance.