Why a Federal Drug Statute Still Governs Colorado Marijuana Taxes
Colorado legalized retail marijuana in 2012 and has licensed adult-use sales since 2014, but the federal Controlled Substances Act has not moved. Marijuana remains Schedule I federally, and Internal Revenue Code Section 280E denies any deduction or credit for amounts paid or incurred in carrying on a trade or business that consists of trafficking in a controlled substance prohibited by federal law — even where that trade is legal under Colorado's Retail Marijuana Code or Medical Marijuana Code.
The result is a federal tax base that looks nothing like a normal retailer's. A Denver dispensary cannot deduct rent, marketing, security payroll, or bank fees the way a liquor store down the street can. Only cost of goods sold survives, because the Supreme Court has long held that COGS is a reduction to gross receipts, not a deduction, so it falls outside 280E's reach.
How the Disallowance Actually Hits the Return
Operators sometimes assume 280E simply raises their tax rate. It does something worse: it taxes gross profit rather than net income. A cultivation facility in Pueblo County with thin margins can post a book loss and still owe a substantial federal tax bill, because payroll for trimmers who never touch inventory, marketing spend, and administrative overhead are added back before the return is calculated.
Every MED-licensed business we work with — Retail Marijuana Stores, Medical Marijuana Centers, Cultivation Facilities, and Infused Products Manufacturers alike — has to run this add-back calculation on Form 8275 or as a schedule attached to Form 1120 or 1120-S, and defend the resulting cost allocation if audited.
- COGS-eligible costs: seeds, clones, nutrients, growing labor, packaging directly tied to product, and (for retailers) invoice cost of inventory purchased for resale.
- Non-deductible costs: retail rent, budtender wages, advertising, most utilities allocated to non-production space, and general administrative overhead.
- Gray-zone costs: shared facility costs, security, and management salaries require a defensible allocation method — not a guess.
The Colorado State Subtraction Most Operators Miss
Colorado does not follow 280E for state income tax purposes. The state return allows a subtraction for expenditures that were disallowed federally under 280E, effectively letting Colorado licensees deduct ordinary and necessary business expenses at the state level even though the IRS will not allow them federally.
This subtraction has to be computed and documented carefully — it is not automatic, and the Colorado Department of Revenue expects the disallowed amounts to reconcile back to the federal return. Operators who skip this step are voluntarily overpaying Colorado income tax on top of an already inflated federal bill.
Legitimate Ways to Manage the Impact
There is no legal way around 280E, but there is a wide range in how much it costs a given operator, and that range is driven almost entirely by cost accounting discipline. Vertically integrated operators that also hold a Cultivation Facility license have more COGS-eligible activity to work with than a standalone retail store, but only if the cultivation, processing, and retail functions are properly separated and costed.
- Build a 471/263A-compliant cost accounting method before year one, not after an audit notice.
- Track time and space allocations for employees and square footage that touch both production and retail activity.
- Keep entity structure clean — a shared bank account between a cultivation entity and a retail entity is a red flag for both METRC and IRS reviewers.
- Model estimated tax payments quarterly; 280E liabilities are large enough to create cash flow surprises without planning.
