State Marijuana Taxes Top $28 Billion Since Legalization Began

More than a decade of legal adult-use cannabis sales has funneled over $28.4 billion into state treasuries, according to a new tally from the Marijuana Policy Project — a milestone that arrives just as several of the country’s oldest markets show signs of strain.

The pro-legalization group credits 2025 as the strongest year yet, with states collecting more than $4.5 billion in adult-use cannabis taxes, edging past the roughly $4.4 billion brought in during 2024. For lawmakers staring down tighter budgets and shrinking federal support, that money has become a dependable line item rather than an experiment.

Where the revenue concentrates

The report counts only excise and standard sales taxes on adult-use products. It leaves out medical cannabis, licensing fees, the income taxes paid by industry workers, and anything collected by city or federal governments — so the full public haul runs higher than the headline number.

Even on that narrower measure, the money clusters in a handful of mature markets. The group’s tally shows seven states each cleared $200 million in adult-use taxes in 2025, and three — California, Illinois and Michigan — topped half a billion dollars. California sits in a category of its own. The state’s tax agency, the California Department of Tax and Fee Administration, reports that cannabis sales have generated more than $7.87 billion since licensed sales began in January 2018, including more than $1 billion in 2025 alone.

States have steered the money toward general budgets and earmarked programs alike — Medicaid, school construction, road repair, behavioral health, and grants for communities hit hardest by past cannabis arrests.

The oldest markets are leveling off

Colorado and Washington opened the first adult-use stores in 2014, and both now show the ceiling these markets can hit. Colorado’s cannabis tax and fee revenue peaked at about $423 million in 2021 and has slipped every year since, falling to roughly $236 million in 2025, according to the state’s Department of Revenue. Washington, which levies one of the steepest excise rates in the country at 37%, saw its 2025 collections dip as well.

The softening is not unique to tax receipts. US cannabis sales recorded their first annual decline on record in 2025, as oversupply drove wholesale prices down and newly legal neighboring states pulled away out-of-state shoppers. When prices fall, percentage-based taxes collect less on every sale — a structural reason mature states are watching revenue plateau even as more customers buy legally.

Massachusetts has bucked the trend, the report says, with cannabis tax revenue rising every year since sales began and total collections crossing $1.5 billion in early 2026 — even as the state confronts a ballot effort to repeal legalization.

Tax design becomes the policy fight

For state officials, the clearest lesson of the past decade is that the tax rate itself shapes how much survives in the legal market. Set it too high, and consumers drift back to untaxed illicit sellers; set it too low, and the public benefit shrinks. The report’s author, MPP executive director Adam J. Smith, warned that “overtaxing legal cannabis can be self-defeating, driving consumers back to the unregulated, unsafe and untaxed illicit market.”

That tension is already reshaping state law. California briefly raised its cannabis excise tax to 19% in mid-2025 before reversing course; a law Gov. Gavin Newsom signed in September 2025 returned the rate to 15% through 2028, a move officials tied to keeping licensed retailers competitive against the illicit market. Michigan moved the opposite way, imposing a new 24% wholesale tax that took effect January 1, 2026 — prompting a lawsuit from the state’s cannabis industry association and warnings of layoffs and closures.

What to watch next

The map is still growing. Virginia remains the only state to legalize adult possession without authorizing taxed retail sales, though state leaders recently reached a deal to open a regulated market. Newer markets in Delaware and Minnesota, which began sales in 2025, will pad the national total long before they rival the receipts of California or Illinois.

For legalization advocates heading into the next round of statehouse debates, the cumulative figure makes a straightforward argument: even a maturing, lower-priced market is sending billions to public programs that states would otherwise have to fund some other way.

References:

^{1. Marijuana Policy Project, “Cannabis Tax Revenue in States that Regulate Cannabis for Adult Use” (2026). https://www.mpp.org/issues/legalization/cannabis-tax-revenue-states-regulate-cannabis-adult-use/}