The Hemp Cliff: When a Product Stops Being Hemp

For years, a hemp product’s federal status came down to one number on a lab report: delta-9 THC at or below 0.3 percent. In late 2025, Congress changed the test. Once the new definition takes effect, some products that qualify today will not, and the inventory, contracts, and revenue built around them will need a new plan.

Whether a specific product still qualifies is a legal question for your regulatory counsel. This article covers the other half: what the change does to your books, your tax return, and your cash.

What changed in the federal definition

The fiscal 2026 agriculture appropriations law, enacted November 12, 2025, rewrote the federal definition of hemp (P.L. 119-37, Div. B, §781, amending 7 U.S.C. §1639o). According to the Congressional Research Service, the main changes are:

• Total THC, not just delta-9. Hemp is limited to 0.3 percent total THC, including THCA, on a dry weight basis.
• Synthesized cannabinoids are out. Products with cannabinoids the plant cannot naturally produce, or with natural cannabinoids synthesized or manufactured outside the plant, are excluded.
• A per-container cap. Final hemp-derived cannabinoid products with more than 0.4 milligrams of combined total THC and similar cannabinoids per container are excluded. Intermediate products above 0.3 percent combined are excluded too.
• Industrial hemp stays in. Hemp grown for fiber, grain, seed oil, and similar non-cannabinoid uses is expressly included.

Products that fall outside the definition are to be classified as marijuana under the Controlled Substances Act (CRS In Focus IF13136).

Two dates, not one

The change was originally set to take effect November 12, 2026. A continuing resolution signed September 2, 2026 (P.L. 119-103) split that date (CRS In Focus IF13136, updated September 28, 2026):

• November 12, 2026: the exclusion for products containing cannabinoids that are not capable of being naturally produced by the plant.
• December 11, 2026: the rest of the new definition.

As of that CRS update, FDA had not published the cannabinoid lists or the added detail on “container” that the law calls for, and bills to delay or repeal the change had been introduced but not enacted. Plan around the dates in the law, not the hope of another delay.

California got here first

Since 2024, state rules have required industrial hemp foods, beverages, and dietary supplements to contain no detectable total THC and limited sales to adults 21 and over (CDPH; Cal. Code Regs., tit. 17, §23000 and following). AB 8 (Stats. 2025, ch. 248), signed October 2, 2025, moves intoxicating hemp into the state’s cannabis framework. Most of it took effect January 1, 2026, and beginning January 1, 2028, intoxicating hemp must be manufactured, tested, and sold like cannabis (California DCC).

The federal change still reaches California businesses at the edges: products made here and sold in other states (CDPH says inhalable hemp products may be sold only outside California), CBD products carrying trace THC above the per-container cap, and inputs bought from or sold to out-of-state partners. Counsel can map which products sit where. Our hemp industry page shows how TreeStar supports hemp businesses.

What happens on the books

For financial statements. Inventory on FIFO or average cost is carried at the lower of cost and net realizable value, and a decline is recognized as a loss in the period it occurs (ASC 330-10-35-1B). Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation (ASC Master Glossary). With no lawful sale left, that may be little more than salvage. ASC 330 also calls for recognizing net losses on firm purchase commitments for inventory.

For the tax return. Book write-downs do not carry over automatically. Goods unsalable at normal prices because of damage, changes of style, or “other similar causes” may be valued at bona fide selling prices less direct cost of disposition, which means actually offering the goods within 30 days after the inventory date (Treas. Reg. §1.471-2(c)). The Supreme Court rejected a write-down of excess inventory that was not backed by actual sales or dispositions (Thor Power Tool Co. v. Commissioner, 439 U.S. 522 (1979)). Whether a change in law counts as a “similar cause,” and how to treat goods that cannot lawfully be offered at all, are questions to work through with your tax advisor. In many cases the tax benefit follows the actual, documented disposal.

A hypothetical. A brand holds $200,000 of finished goods, at cost, in a line that will fall outside the definition on December 11. It expects to sell $50,000 of that cost before then. The remaining $150,000 has a salvage value of about $10,000, so the book write-down is about $140,000. On the tax return, much of it may wait until the goods are disposed of and documented, so book and tax income can differ for a while. The brand also has a noncancelable $40,000 order for ingredients it can no longer use: a likely book loss now, and cash out the door later. For tax, that loss generally waits until the liability is fixed and economic performance occurs (IRC §461(h)).

If your inventory numbers are shaky to begin with, start with The Most Dangerous Number in a Regulated Business.

One more tax question: a product outside the hemp definition is federally treated as marijuana. A business that later sells such products under a state cannabis license, as California’s framework contemplates from 2028, may inherit the §280E questions cannabis operators know well. See Section 280E After the 2026 Partial Rescheduling.

Contracts, customers, and cash

• Purchase commitments. Pull every open purchase order and supply agreement for affected inputs. Note minimums, cancellation rights, and change-in-law clauses, and have counsel read them before you call the vendor.
• Reformulation costs. Track lab work, new packaging, label changes, and scrapped materials in their own accounts. Some may be product cost; some may be domestic research expenditures, which can again be deducted currently for tax years beginning after 2024 (IRC §174A).
• Customer and distributor terms. If customers can return unsold product, expected returns reduce the revenue you record now (ASC 606). Review chargebacks, credits, and receivables from customers who depend on the affected line.
• Revenue concentration by SKU. Run revenue and gross margin by product. A line with 30 percent of revenue can carry half of the gross margin.
• Cash runway. Model lost margin, unsellable stock, commitments you still owe, and reformulation spend. The cash flow calculator is a quick first pass.

A checklist to run before the effective dates

• Classify every SKU with counsel. Product, cannabinoid profile, THC per container, and which date (if either) applies. Counsel decides status; the list drives the accounting.
• Count and cost affected inventory. By SKU and lot, including raw materials and work in process.
• Estimate sell-through. How much can lawfully be sold before the date that applies?
• Set the book write-down. Measure the rest at net realizable value and document the estimate.
• Plan the tax side. Decide with your tax advisor how and when disposals happen, and build the destruction record (dates, quantities, lots, witnesses, regulatory notices) before anything is destroyed.
• List open commitments. Purchase orders, minimums, and cancellation terms.
• Review customer terms. Returns, credits, and receivables tied to affected products.
• Budget the reformulation. Cost, timing, and the revenue gap while new product reaches the shelf.
• Re-run the cash forecast. At least 13 weeks, with affected lines at zero.
• Talk to your lender early. A write-down can move covenants tied to inventory, margin, or net worth.
• Watch for changes. FDA lists, any further federal action, and new California DCC rules can all shift the picture.

How TreeStar can help

The TreeStar team can help hemp businesses see the cliff in the numbers before they reach it: inventory accounting by SKU and lot, documented write-downs, cash flow forecasting through the transition, and tax planning for disposals and reformulation costs. We work alongside your regulatory counsel, who decides which products qualify, so the books, the return, and the plan reflect those decisions.

This article is general information, not advice for your situation. Rules change; confirm current law before acting.