Op-Ed: Tax Weed by THC Potency, Not by Price

When a state legalizes cannabis, taxes almost always come along for the ride. A new op-ed takes on how those taxes should be built, and makes the case that lawmakers should tax marijuana according to how much THC it contains rather than how much it costs at the register.

The reasoning starts with why society taxes cannabis in the first place. The main reason, the author says, is one molecule: delta-9-tetrahydrocannabinol, the compound primarily responsible for getting people high. If the goal is to account for the effects of intoxication, the argument goes, it makes more sense to tax the thing that causes it directly.

Then comes the practical case. Prices for legal cannabis have been dropping in many markets as competition grows and supply expands. Taxes based on a percentage of price shrink along with them, so revenue can fall even as people keep buying. A tax aimed at THC itself, by contrast, is described as stable. It keeps pushing against intoxication and rising potency even when pre-tax prices are sliding.

That second point speaks to a real trend. Products with higher and higher THC levels have become a big part of the market, and a potency-based system would naturally charge more for the strongest items and less for milder ones. Supporters of this approach see it as a way to nudge consumers and producers away from the extremes without banning anything.

Whether lawmakers go for it is another matter. Tax design affects everything from what shoppers pay to how competitive the legal market is against the illicit one. Still, with states constantly tweaking their cannabis tax codes, the idea of tying the bill to potency instead of price is a conversation worth having, especially for anyone who has watched shelf prices drop while tax revenue forecasts keep getting revised.