Cannabis Tax Under IRC 280E: Why You Cannot Deduct Normal Business Expenses

Cannabis is legal in most states, but federal tax law does not care. Marijuana remains a Schedule I controlled substance under the Controlled Substances Act, and IRC 280E says that no deduction or credit shall be allowed for any amount paid or incurred during the taxable year in carrying on any trade or business if that trade or business consists of trafficking in controlled substances prohibited by federal law. The statute is one sentence long, and it applies to every state-licensed cannabis operation in the country. The only offset available is cost of goods sold, which is not a deduction at all but a reduction in gross receipts to arrive at gross income. The result: cannabis businesses routinely pay effective federal tax rates of 60% to 80% of their net income, sometimes higher. No other legal industry in the United States faces this burden.

What exactly does IRC 280E say?

The statute is short enough to paraphrase in full. Section 280E of the Internal Revenue Code provides that no deduction or credit shall be allowed for any amount paid or incurred during the taxable year in carrying on any trade or business if such trade or business (or the activities which comprise such trade or business) consists of trafficking in controlled substances (within the meaning of Schedule I and II of the Controlled Substances Act) which is prohibited by federal law or the law of any state in which such trade or business is conducted (IRC 280E).

Congress enacted 280E in 1982, after a Tax Court case called Edmondson v. Commissioner allowed a convicted drug dealer to deduct the cost of his telephone, scale, packaging materials, and automobile on his tax return. The IRS won on the unreported income but lost on the deductions because ordinary and necessary business expenses under IRC 162 do not have a legality requirement. Congress responded by adding 280E to close that gap. The provision was written for street-level drug traffickers. It now applies to every state-licensed dispensary, cultivator, and manufacturer operating in a state where cannabis is legal, because the federal classification has not changed.

As of September 2026, marijuana remains on Schedule I. Various proposals to reschedule marijuana to Schedule III (which would remove it from 280E’s reach) and to repeal 280E directly have been introduced in Congress, but none has been enacted into law. Until that changes, 280E applies to every cannabis business filing a federal return.

Why is cost of goods sold not a “deduction”?

This distinction is the entire survival mechanism for cannabis tax planning. Under the Internal Revenue Code, gross income is defined as gross receipts minus cost of goods sold (IRC 61). COGS is not a deduction under IRC 162 or any other deduction provision. It is a calculation that happens before you arrive at gross income, and 280E only disallows deductions and credits. Because COGS is neither, it survives.

The IRS confirmed this interpretation in Chief Counsel Advice 201504011 and in its own audit guides for cannabis businesses. The Tax Court reinforced it in Californians Helping to Alleviate Medical Problems, Inc. v. Commissioner (CHAMP), 128 T.C. 173 (2007), which is the foundational case for cannabis taxation. CHAMP established that a cannabis dispensary could reduce its gross receipts by COGS, and that 280E did not prohibit that reduction. Everything below the gross income line, however, was disallowed.

This means the entire tax strategy for a cannabis business is about maximizing the costs that properly fall into COGS and minimizing the costs that fall below it. A dollar in COGS reduces taxable income. A dollar in operating expenses does nothing. The same expenditure, characterized differently, can swing the tax bill by 30 to 40 cents on the dollar. The rules for what qualifies as COGS are not discretionary, though. They are set by the inventory accounting provisions of IRC 471 and the uniform capitalization rules of IRC 263A, and they differ depending on whether the business is a cultivator, a manufacturer, or a retailer. For a detailed walkthrough of the COGS calculation, see Cannabis COGS calculation.

What costs qualify as COGS for a cannabis cultivator?

A cultivator produces inventory (the plant), so it is subject to the full IRC 263A uniform capitalization rules. Under 263A, a producer must capitalize into inventory all direct costs and a proper share of indirect costs allocable to the production activity.

Direct costs include:

• Seeds, clones, and growing media
• Nutrients, fertilizers, and pesticides
• Direct labor (growers, trimmers, anyone whose work directly touches the plant)
• Packaging materials used in the production process

Indirect production costs that must be capitalized under 263A include:

• Rent or depreciation on the cultivation facility (the portion used for growing)
• Utilities for the grow (electricity, water, HVAC to the extent allocable to production)
• Quality control and testing during production
• Indirect labor (cultivation supervisors, facility maintenance workers in the grow area)
• Depreciation on production equipment (grow lights, irrigation systems, extraction equipment)
• Insurance on the production facility
• Repairs and maintenance on production equipment

What does not qualify as COGS, even for a cultivator:

• Dispensary rent (retail space, not production space)
• Sales staff wages
• Marketing and advertising
• General and administrative salaries (CEO, CFO, HR, accounting)
• Professional fees (legal, accounting, consulting)
• Office supplies and equipment unrelated to production
• Delivery and distribution costs (post-production)
• Security at the retail location
• Point-of-sale systems and retail technology

The line between “production” and “everything else” is where the tax planning happens, and where the IRS focuses during audits. A cannabis business that allocates 80% of its facility rent to COGS when only 40% of the square footage is used for cultivation is inviting a reclassification that can double the tax bill. The allocation methodology must be defensible, documented, and consistent. See Cannabis IRS audit risk and compliance for what the IRS looks for.

What about retailers who only buy and resell?

A dispensary that purchases finished product from a licensed cultivator or distributor and resells it is a reseller, not a producer. Resellers are also subject to COGS, but the calculation is narrower. Under the inventory rules for resellers, COGS includes the cost of purchasing the inventory (the wholesale price) plus any costs incurred to bring the inventory to its current location and condition. For a dispensary, that typically means the purchase price, inbound freight, and (in some cases) a portion of warehousing costs.

The reseller’s COGS does not include retail store rent, retail labor, marketing, or administrative overhead, even if those costs are incurred in connection with selling the product. The Tax Court addressed this directly in Patients Mutual Assistance Collective Corp. v. Commissioner (Harborside), T.C. Memo 2018-208, where the dispensary argued that a broad reading of the pre-1987 inventory regulations should allow it to capitalize retail costs into COGS. The Tax Court rejected that argument. The current version of IRC 471 and the regulations under 263A control, and they draw a clear line between the costs of acquiring and producing inventory (COGS) and the costs of selling it (operating expenses, disallowed by 280E).

This is why vertically integrated operations (businesses that both cultivate and retail) generally have a better COGS profile than pure retailers. The cultivation activity generates substantial COGS through direct production costs and the 263A indirect-cost allocation. The retail-only dispensary is limited to the wholesale purchase price of its inventory, which is a much smaller fraction of total spending. Entity structure and operational design can materially change the COGS outcome. See Cannabis entity structure for how the choice between an LLC, S-corp, and C-corp interacts with 280E.

How bad is the effective tax rate?

It is often worse than operators expect, because the math is counterintuitive for anyone accustomed to normal business taxation. In a normal business, if you earn $1,000,000 in revenue and spend $800,000 operating the business, you pay tax on $200,000. In a cannabis business, you might earn $1,000,000 in revenue, spend $800,000 operating the business, and pay tax on $600,000 or more, because only the COGS portion of your $800,000 in spending reduces your taxable income.

Does the entity type change the 280E outcome?

Yes, significantly. A cannabis business organized as a sole proprietorship, partnership, or S-corp passes its income through to the owners, who pay tax at individual rates that can reach 37% federally (plus the 3.8% net investment income tax for passive owners). A C-corp pays tax at a flat 21% federal rate. Under 280E, where taxable income is inflated because operating expenses are disallowed, the C-corp’s lower rate produces a materially lower total tax burden in most scenarios.

The tradeoff is double taxation: the C-corp pays 21% on its taxable income, and the owners pay tax again (at capital gains rates, up to 23.8%) when they withdraw profits as dividends. But because 280E inflates the corporate-level taxable income so dramatically, the math often favors the C-corp even after accounting for the dividend tax. The comparison depends on total revenue, COGS percentage, operating expense levels, owner compensation (which can be structured as a deductible salary even under 280E, because it is compensation for services, not a business deduction of the cannabis operation), and state tax rates. This analysis is specific to each business, and it changes as COGS allocation percentages shift. For a full comparison, see Cannabis entity structure.

Can I split my business to avoid 280E?

The IRS has addressed this directly. In CHAMP, the Tax Court allowed a medical cannabis dispensary to deduct expenses related to a separate caregiving activity (patient counseling, support groups) that was distinct from the cannabis trafficking activity. The court treated the caregiving as a separate trade or business not subject to 280E.

Since CHAMP, the IRS has aggressively challenged business-splitting arrangements. If you operate a dispensary and also sell non-cannabis products (CBD, accessories, apparel) from the same location, the IRS will argue that the non-cannabis sales are part of the same trade or business as the cannabis trafficking. To sustain a separate-business argument, the non-cannabis activity needs its own books, its own staff (or a clear allocation), its own space (or a defensible square-footage split), and economic substance independent of the cannabis operation. A dispensary that sells $1,800,000 in cannabis and $200,000 in branded t-shirts from the same counter, with the same employees, is not running two businesses.

The separate-business strategy can work when the split is real. A management company that provides services to multiple cannabis licensees (not just related entities), with arm’s-length pricing, documented contracts, and genuine economic activity, has a stronger position. But the IRS knows this playbook, and cannabis returns receive disproportionate audit attention. Any business-splitting structure must be defensible on its facts, not just on paper. See Cannabis IRS audit risk and compliance for the audit environment.

What about state taxes?

State tax treatment varies widely. Some states conform to 280E and disallow the same deductions at the state level. Others decouple from 280E and allow cannabis businesses to deduct operating expenses for state income tax purposes, creating a lower effective state rate. Still others impose cannabis-specific excise taxes on cultivation, wholesale transfer, or retail sale, layering additional costs on top of the federal 280E burden.

The state tax landscape is complex enough to warrant its own analysis, and the interaction between state conformity, state-specific cannabis taxes, and multistate operations (growing in one state, selling in another) creates planning opportunities and traps. See Cannabis state tax considerations for a state-by-state breakdown.

What should I do next?

The 280E burden is not something you optimize once and forget. It changes as your product mix shifts, as you add or close locations, as state regulations evolve, and as your COGS allocation methodology is tested (or challenged) by the IRS. The three structural decisions that matter most are COGS methodology, entity type, and whether your operation is vertically integrated or retail-only. All three should be evaluated together, because they interact.

• Cannabis COGS calculation, the detailed walkthrough of what qualifies as cost of goods sold under IRC 471 and 263A
• Cannabis entity structure, how the choice between LLC, S-corp, and C-corp changes the 280E math
• Cannabis state tax considerations, the state-by-state conformity and excise tax landscape
• Cannabis IRS audit risk and compliance, what triggers an audit and how to prepare for one

Related guides:

• Cannabis Ancillary Business Tax Planning
• Cannabis Cost Of Goods Sold Cogs Calculation
• Cannabis Entity Structure Llc Scorp C Corp
• Cannabis Irs Audit Risk Compliance
• Cannabis Payroll Employment Tax 280E

Related guides:

• Tax Planning for Cannabis Businesses: IRC 280E, COGS Deductions, and Entity Structure Under Federal-State Conflict

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.