Check the Tax Line Before the Shelf Price
Two shoppers can pay different prices for the same eighth. The gap comes from tax class, not from the strain. Medical cannabis is taxed as medicine in most states. Adult-use cannabis is taxed as a consumer good, with an excise tax stacked on top of sales tax.
State revenue agencies publish the rates:
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- California: 15% excise tax on cannabis sales. Medical patients with a valid recommendation skip sales tax at the register.
- Colorado: 15% state sales tax on retail marijuana, plus a 15% excise tax on the wholesale transfer. Medical marijuana sits in a separate tax class.
- Arizona: 16% excise tax on adult-use sales. Medical sales skip that excise tax.
Those are state rates. City and county add-ons can push the total past 30% in some retail stores.
Price Ranges by Product
- Flower, per gram: $8 to $15 adult-use, $6 to $12 medical.
- Flower, per ounce: $150 to $300 adult-use, $120 to $220 medical.
- Concentrate, per gram: $20 to $50 adult-use, $18 to $40 medical.
- Vape cartridge, 1 gram: $30 to $60.
- Edibles, 100 mg package: $15 to $30.
These are ranges from published menu data. State markets differ by supply, license counts, and local tax.
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Run the Break-Even Math on a Card
Card costs: evaluation $50 to $200, state fee $20 to $100, renewal each year. Add the total before you switch.
Example one. You buy an ounce a month. Medical price $180. Adult-use price $230 after tax. You save $50 a month, or $600 a year. A $150 card pays for itself in three months.
Example two. You buy an eighth a month. You save $10. A $150 card takes 15 months to break even, and the card expires in 12. In that case the card costs you money.
Parameters to Compare
- Out-the-door total. Ask for the tax-included price, not the menu price.
- Purchase limits. Medical limits run higher than adult-use limits in several states.
- Possession limits. These differ from purchase limits and change at state lines.
- Potency caps. Some states cap THC per package for adult-use and set different caps for medical.
- Distance and hours. Store counts are lower in medical programs, so drive time and closing hours favor adult-use stores.
- Delivery rules. Delivery is licensed by city in some states and banned in others.
- Allotment tracking. States track purchases in a database, so a purchase today can block a purchase tomorrow.
Pitfalls
- Crossing state lines with a medical card. Most states do not accept another state's card, and federal transport is illegal.
- Letting the card lapse. One month of adult-use prices can erase a year of savings.
- Assuming medical shelves are cheaper. In some stores the flower price is the same and tax is the whole difference.
- Buying a larger amount to chase a discount. Product you do not use is not a saving.
- Assuming a card raises potency limits or purchase limits. Rules differ by state and by product.
- Ignoring the drive. A 20-minute trip each way plus wait time is a real cost.
Convenience wins when the tax gap is small. If your card saves $10 a month and adds 40 minutes of driving, the adult-use store down the street is the cheaper option.