If you hold both a medical and an adult-use license, something strange happened to your business on April 23, 2026. You didn’t change anything. Same building, same staff, same inventory moving through the same door. But as of that date, half your operation lives under one set of tax rules and half lives under another.

The DOJ’s Final Order rescheduled state-licensed medical cannabis to Schedule III. Section 280E applies only to Schedule I and Schedule II substances, which means it no longer applies to your medical business. Your adult-use business? Still Schedule I. Still fully exposed.

Most of the coverage treated this as good news, and for medical-only operators it plainly is. But if you run both, rescheduling didn’t simplify your taxes. It handed you an allocation problem, and the return where you have to solve it is the one you file next spring.

The Deduction You Couldn’t Take Is Now the Deduction You Have to Split

Here’s what changed in practical terms. Before April, the answer to “can I deduct this?” was mostly no. Marketing, admin salaries, rent above the production floor, professional fees, most of your operating expenses below the COGS line got disallowed and you paid tax on gross profit rather than net income. Painful, but simple. Everything was non-deductible, so nothing had to be sorted.

Now that same expense needs a home. The portion attributable to your medical operation is deductible. The portion attributable to adult-use is not and nobody hands you that split.

The Truth: 280E relief for dual-license operators isn’t a discount you receive. It’s a deduction you have to substantiate. The operators who get the full benefit will be the ones whose books can prove which side of the house each dollar belonged to. The ones who guess will either leave money on the table or hand an examiner an easy adjustment.

Think about your general manager’s salary. She oversees both sides. Your insurance policy covers the whole facility. Your accounting fees, your security contract, your utilities, your lease. Almost nothing in a vertically integrated or co-located operation sorts itself cleanly into one bucket.

Treasury Says 2026 Counts in Full

One piece of genuinely good news buried in the guidance: Treasury and the IRS have indicated they expect a transition rule under which rescheduling applies to a business’s entire taxable year that includes the effective date of the Final Order. For calendar-year filers, that means all of 2026, not just the days after April 23.

What this means for you: You are not stuck stub-period accounting your way through a partial year. It also means the clock on getting your allocation right started in January, retroactively, and you may have eight months of transactions already booked without any medical-versus-adult-use tagging on them.

That cleanup is the work. It is much easier to do now, in August, than in March with a filing deadline in front of you.

Building an Allocation You Can Actually Defend

There’s no IRS-blessed formula here. What there is, is a well-established principle: direct tracing beats estimation, and a documented method beats an undocumented one every single time.

Work in this order.

• Direct tracing first. Any cost you can tie to one license by its nature should be tied to it and left alone. Separately metered space. Staff who work exclusively on one side. Inventory purchased under a specific license. Compliance and licensing fees that name the license. This is the strongest category of support you have, and most operators have more of it than they think, they just haven’t tagged it.
• Reasonable drivers second. For genuinely shared costs, pick a driver that has a real economic relationship to the expense. Square footage for occupancy costs. Headcount or hours for shared labor. Transaction count or units moved for point-of-sale and packaging. The driver should be something you could explain to a regulator in one sentence without flinching.
• Pro rata revenue last. Splitting shared overhead by medical versus adult-use revenue is the fallback, not the default. It’s defensible when nothing better exists. It’s weak when a better driver was available and you didn’t bother.
• Document the rationale in writing, before you file. A short position paper that states your method, why you chose it, what data supports it, and how you’ll apply it consistently. This is the single highest-value hour of work in the entire exercise.

Red Flag: If your allocation method happens to place nearly every shared cost on the medical side, you have built an audit magnet. Aggressive allocation is exactly the kind of thing an examiner looks for, and a split that doesn’t match the operational reality of your business will not survive a walkthrough of your facility. Be right, not optimistic.

About Those Amended Returns

The Final Order directs Treasury to consider retrospective relief for prior years in which a licensee operated under a state medical license. Consider is doing real work in that sentence. As of now, Treasury has not announced whether or how retrospective relief will be granted.

Some operators are filing amended returns and protective refund claims to preserve their position while the statute of limitations runs, generally three years from filing or two years from payment, whichever is later. That’s a legitimate strategy and for some operators it’s the right one.

It is also not free. The IRS has already moved to claw back a multi-million dollar 280E refund from one multi-state operator, with interest. Filing a claim invites scrutiny of the return it amends.

The trap: treating a refund claim as found money. It’s a tax position, and it carries the same three costs every aggressive position carries: professional fees to prepare it, exposure on the underlying return, and the possibility of paying it back later with interest. Have that conversation with your tax advisor with clear eyes, not with a number already spent.

What to Do in the Next Sixty Days

Rescheduling handed you a real financial benefit. Capturing it is an accounting project, not a windfall.

Get your chart of accounts segmented by license type so new transactions sort themselves going forward. Go back through 2026 and tag what’s already booked. Identify every cost you can trace directly and stop treating it as shared. Choose your drivers for what’s genuinely mixed, and write down why. Then run the numbers and see what your FY2026 position actually looks like, while there’s still time to change course.

The operators who treat this as a filing-season problem will be reconstructing eight months of history under deadline pressure and defending a method they picked in a hurry. The ones who treat it as an August problem will file with confidence and keep the money.

Your license changed what the law lets you deduct. Only your books can prove how much.

Do you hold both a medical and an adult-use license? Mindtrix works exclusively with cannabis operators. We’ll segment your chart of accounts by license type, build a defensible allocation methodology with the documentation to back it, and make sure your FY2026 return captures every dollar of relief you’re entitled to without creating exposure you don’t need.

SCHEDULE YOUR FREE ASSESSMENT HERE

If the IRS asked you today how you split your GM’s salary between medical and adult-use, could you answer? Drop your answer in the comments.