How Section 280E Actually Works
280E disallows ordinary and necessary business expense deductions under Section 162 for a business trafficking in controlled substances. It does not disallow cost of goods sold, because COGS is a reduction in gross receipts required to arrive at gross income — a constitutional floor that Congress cannot tax around. Every legitimate cannabis tax strategy in California begins and ends with that distinction.
The practical consequence: expenses that a normal California business would deduct — marketing, delivery, rent on the retail floor, most administrative payroll — are permanently lost at the federal level. Costs that are properly inventoriable under the applicable inventory rules survive. A dispensary that treats 280E as a filing-season problem discovers the damage after the year is closed. A dispensary that treats it as a chart-of-accounts and cost-accounting problem captures every dollar it is entitled to.
- Section 162 deductions: disallowed for the plant-touching trade or business
- Cost of goods sold: allowed, and governed by Sections 471 and 263A
- Credits: generally disallowed alongside deductions
- State treatment: California allows deductions the federal return denies
COGS Methodology That Survives Examination
The IRS has consistently challenged cannabis taxpayers who reclassify selling expenses into inventory. Champ, Olive, Patients Mutual (Harborside) and CHAMP-line reasoning all point the same direction: a reseller's COGS is limited to the invoice price of the product plus transportation and necessary charges to acquire it, while a producer may capitalize a substantially wider set of indirect production costs.
That distinction drives structure. Retailers have a narrow COGS ceiling. Cultivators and manufacturers, as producers, capitalize direct materials, direct labor and a defined set of indirect production costs into inventory, which flows through COGS as product is sold. We document the methodology in writing, tie it to the general ledger, and keep the workpapers that support each allocation.
Retail (Reseller) Positions
For a licensed retailer, we capture invoice cost, inbound transportation, and the direct costs of acquiring and holding inventory that the reseller rules permit. We separate the retail floor from any non-plant-touching activity that legitimately operates as its own trade or business, and we document the separation with real economics — separate books, separate agreements, separate personnel time records.
Producer Positions
Cultivators, manufacturers and processors capitalize direct materials, direct labor and allocable indirect production costs. Cultivation utilities, nutrient inputs, cultivation payroll, grow-room depreciation, quality assurance and in-process testing are typically inventoriable. We build a standard cost or actual-cost model, reconcile it to production output, and revalue inventory at period end.
Year-Round Planning, Not Filing-Season Triage
A 280E position is created during the year, in the way costs are captured and coded, not in April. We set up the chart of accounts so that inventoriable and non-inventoriable costs are separated at the point of entry, run quarterly reviews of the effective tax rate, and model estimated payments against actual gross margin rather than a prior-year safe harbor that no longer reflects the business.
Planning also means avoiding the two most expensive mistakes in California cannabis: underfunding federal estimated payments while paying state excise obligations, and taking aggressive expense positions with no contemporaneous documentation. Both are correctable in advance and painful in arrears.
- Quarterly effective tax rate and cash tax forecasting
- Reasonable compensation and owner distribution review
- Entity and structure analysis where separate trades or businesses genuinely exist
- Written methodology memoranda kept with the tax file
Documentation, Substantiation and Audit Readiness
Assume examination. Cannabis returns draw attention because of the size of the disallowance at stake and the cash-intensive nature of the industry. The taxpayer bears the burden of substantiating inventory costs, so the workpapers matter as much as the return.
We maintain a standing audit file: inventory valuation workpapers tied to METRC quantities, labor allocation studies with supporting time records, depreciation schedules by function, intercompany agreements, and the memoranda supporting each significant position. When an examination opens, the response package already exists.
California-Specific Interaction
California does not conform to 280E for licensed commercial cannabis activity, so ordinary and necessary business expenses are generally deductible on the California return even where the federal return disallows them. That divergence creates permanent book-to-tax differences and a state return that looks nothing like the federal one.
It also creates planning value. State-level deductibility means the after-tax cost of an expense differs sharply between the federal and California computations, which affects compensation planning, lease structuring and the decision to house certain functions in a separate entity.
What 280E Costs a Real California Operator
Consider a Los Angeles storefront retailer with $6,000,000 of gross receipts, a 48 percent product margin and $2,300,000 of operating expenses. Gross profit is roughly $2,880,000 and book pre-tax income is roughly $580,000. Federally, almost none of the $2,300,000 is deductible, so the tax base is gross profit rather than income. The result is a federal liability calculated on nearly five times the economic profit, and an effective rate that would be absurd in any other industry.
Now move the same operator to cultivation. A Humboldt County mixed-light cultivator with the same revenue capitalizes cultivation payroll, nutrients, power, water, grow-room depreciation and quality assurance into inventory. The disallowed pool shrinks to sales, marketing and general administration, and the effective rate falls dramatically. Nothing about the underlying economics changed — only the license type and the quality of the cost accounting behind it.
This is why we start every 280E engagement with a modeled comparison of current-state and properly-costed federal liability. The gap is usually large enough to fund the entire accounting function several times over, and it is quantified before any work is done.
Case Law That Shapes Every Position We Take
CHAMP established that a taxpayer can operate a separate, non-trafficking trade or business alongside a cannabis business and deduct the expenses of that separate business. It also established the standard: genuine separateness, supported by real allocation of employee time, space and expense. Olive narrowed the practical scope by rejecting a claimed second business that was in substance a way to give away services to cannabis customers.
Patients Mutual, the Harborside case, closed the door on retailers dressing selling expenses as inventory cost and confirmed that a reseller's COGS is governed by the reseller rules. Richmond Patients Group and later decisions reinforced that 263A does not expand a trafficker's inventoriable costs beyond what 471 already permits for that taxpayer type.
The through-line is that structure and documentation win cases, and creative recharacterization loses them. We take positions that we can trace to a specific inventory rule, and we write down why, at the time, not in response to an information document request.
- CHAMP: separate trade or business is possible, with real economic separation
- Olive: form without substance fails
- Patients Mutual: resellers cannot inventory selling costs
- Consistency across years matters as much as the position itself
