What you pay for legal cannabis depends more on where you buy it than on what it is. Illinois, Washington, and Alaska sit at the top of the price range. Oregon, Michigan, and Colorado sit near the bottom. The difference is state law: excise tax design, how many growers the state licenses, and whether a medical program lets patients skip the heaviest taxes.
An ounce of comparable mid-tier flower can run under $130 in one state and over $350 in another. Nothing about the plant changed. The rules did.
Three ways states tax cannabis
Nearly every legal state leans on one of these structures, and several stack two of them.
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- Percentage of retail price. Washington charges 37 percent at the register. California adds a 15 percent excise tax on top of sales tax. Illinois applies an excise of up to 25 percent on high-THC flower, plus state and local sales tax.
- Weight. Alaska taxes cultivators by the ounce, and Maine taxes by weight at the grower level. You never see the line item because it is already inside the shelf price.
- Potency. Montana and Illinois tax at least partly by THC content. A 30 percent strain can carry a higher tax rate than a 20 percent strain from the same shelf.
Where prices stay high
Illinois has been the benchmark for expensive since adult-use sales began: license caps, a potency-tiered excise, and layered local taxes in Chicago pushed flower past $350 an ounce at times. Washington's flat 37 percent excise applies to every purchase no matter the product. New Jersey, Connecticut, and Alaska also run high, whether from tax design or from too few licensed growers serving the whole state.
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Where prices fall
Oregon, Michigan, and Colorado show what happens when supply outruns demand. Michigan's average flower price dropped by more than half within a few years of adult-use launch. Oregon's wholesale market got cheap enough that some growers stopped harvesting. When more cannabis is grown than sold, retail prices follow, and taxes take a smaller bite in dollar terms.
Medical programs usually cost less
This is the biggest single discount in most states. Illinois charges 1 percent on medical purchases and waives the excise tax. Michigan exempts medical from the excise that applies to adult-use sales. Maine and several other states skip excise for patients. If you qualify for a card, the same product can land 20 to 35 percent cheaper at the register.
Local taxes and hidden costs
City and county add-ons are the quiet part of the bill. Denver, Chicago, San Francisco, and dozens of smaller jurisdictions levy their own percentage, so two shops in one state can post different prices. Delivery fees, mandatory lab testing, child-resistant packaging, and state seed-to-sale tracking all get priced in as well. You cannot legally carry cannabis across state lines, so you pay the local rate or you do not buy it.
How to compare prices honestly
Look at the pre-tax subtotal, not the total, when comparing menus. Then check the tax type. A weight or potency tax hides inside the shelf price, so a state that looks light at the register may not be cheaper once you run the numbers. Finally, compare the same tier and package size, and check whether the label lists potency and contaminant testing. A cheap eighth that skipped a full panel is not the same product as one that cleared it.