Excise Tax on Cannabis

What an excise tax is

An excise tax is a tax levied on a specific good rather than on income or general sales. Governments use excise taxes for three overlapping reasons: to raise revenue, to discourage consumption of goods considered harmful (so-called 'sin taxes' on alcohol, tobacco, and gambling), and to fund programs tied to the taxed activity. Cannabis excise taxes inherit this framing. They sit on top of ordinary sales tax and are typically collected from cultivators, distributors, or retailers, then passed through to consumers in the shelf price ^[1][2].

This article is informational and is not legal or tax advice. Cannabis tax law changes frequently; consult a licensed attorney or CPA for your jurisdiction.

How cannabis excise taxes are structured

There are three main designs, and many jurisdictions combine them ^[1][3]:

• Ad valorem (percentage of price). The tax is a percentage of the wholesale or retail price. Simple to administer but tax revenue falls as wholesale prices drop — which has happened in every mature legal market.
• Weight-based. A fixed dollar amount per gram or ounce, often with different rates for flower, trim, and immature plants. Revenue is more stable but doesn't scale with potency.
• Potency-based (THC). Tax scales with milligrams of THC. New York and Connecticut adopted versions of this. Proponents argue it aligns the tax with intoxication; critics note it is expensive to test for and may push consumers toward cheaper, higher-THC products ^[3][4].

Canada uses a hybrid: a federal excise duty of the greater of $1 per gram or 10% of the producer's selling price, plus provincial markups and standard GST/HST ^[5].

US state examples

Rates and bases vary dramatically. A non-exhaustive snapshot (verify current rates with your state revenue department) ^[1][3]:

• California: 15% state cannabis excise tax at retail, plus state and local sales tax and local cannabis business taxes. A separate cultivation tax was repealed effective July 1, 2022 ^[6].
• Colorado: 15% wholesale excise tax plus 15% retail marijuana sales tax, on top of standard sales tax ^[7].
• Washington: 37% excise tax at retail — among the highest in the country ^[1].
• Illinois: Tiered by product type and THC content: 10% on flower ≤35% THC, 20% on infused products, 25% on flower >35% THC, plus state and local sales tax ^[3].
• New York: Potency-based at the distributor level (0.5–3 cents per mg of THC depending on product) plus a 9% state and 4% local retail excise ^[3].

No federal excise tax exists in the US because cannabis remains a Schedule I controlled substance under the Controlled Substances Act, though federal reform proposals have repeatedly included one ^[2].

Why the rate matters: the illicit market problem

Cannabis is unusual among taxed goods because a robust untaxed substitute — the illicit market — already exists. Multiple analyses have found that when total taxes push legal retail prices significantly above illicit prices, consumers shift back to unlicensed sources, undermining both revenue and the public-health rationale for legalization ^[1][4][8].

California is the most cited example: high combined taxes, local bans on retail in roughly two-thirds of municipalities, and a mature illicit supply chain have kept the unlicensed market larger than the legal one years after adult-use sales began ^[8]. Strong evidence that high effective tax rates correlate with smaller legal market share; Disputed on exactly which rate is 'optimal.'

Weight-based taxes also create a perverse incentive once wholesale prices crash: the tax becomes a larger share of the final price over time. Several states have adjusted their structures in response ^[3].

Where the money goes

Most legalization statutes earmark excise revenue. Common destinations include the state general fund, K–12 education, substance-use treatment, law enforcement training, social-equity programs for communities harmed by prohibition, and expungement programs ^[1][7]. Colorado's BEST program (school construction) and Illinois's R3 program (community reinvestment) are frequently cited examples. Actual disbursement and whether the promised programs receive what voters were told they would is a separate, ongoing political question — and one worth checking in your own state's annual revenue reports.

Recent changes and what to watch

As of the last-verified date below:

• California eliminated its cultivation tax in 2022 and shifted excise collection from distributors to retailers; the legislature has periodically revisited the 15% rate, with statutory adjustments tied to revenue ^[6].
• Several states (Michigan, Missouri, Maryland after 2023 legalization) have opted for relatively low, simple ad valorem rates, partly as a deliberate strategy against illicit competition ^[3].
• Federal rescheduling of cannabis from Schedule I to Schedule III, proposed by the DEA in 2024, would not by itself create a federal excise tax but would change the IRC §280E business-tax landscape, which is a different issue from excise ^[2][9].

Last verified: 2024-06. Rates and statutes change; always confirm with the state revenue department or a qualified professional before relying on any number in this article. This is not legal or tax advice.

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