McConnell Hemp Provision Puts $28B THC Market on Clock

What the law changed

The provision rewrites the federal definition of hemp that the 2018 Farm Bill created.

Under the 2018 Farm Bill, codified at 7 U.S.C. § 1639o, hemp meant cannabis with no more than 0.3% delta-9 THC by dry weight. Manufacturers used that measurement to sell intoxicating edibles, drinks and vapes made from hemp-derived compounds. That was the gap.

Congress moved to close it in the fiscal 2026 spending package, H.R. 5371, signed Nov. 12, 2025. Fortune credits McConnell, R-Ky., with the fix.

The 0.4 mg cap and what it hits

The enacted text caps total THC at 0.4 milligrams per container and excludes cannabinoids made outside the plant.

Based on the statute's text, these categories are most exposed:

• Delta-8 THC gummies, vapes and tinctures
• Hemp-derived THC beverages
• THCA flower, because the cap counts total THC
• Cannabinoids synthesized or manufactured outside the plant

The law doesn't ban hemp. It bans the product category the loophole created: anything intoxicating sold above 0.4 mg of total THC per container.

A $28 billion exposure

Fortune puts the size of the affected industry at $28 billion.

That figure covers a sprawling retail channel: smoke shops, gas stations, online stores and beverage distributors that sold THC outside state dispensary systems. Many of those businesses never held a cannabis license.

Licensed operators in states such as California and Ohio face a different calculation, since hemp-derived THC competed with them on price and without 280E-style tax burdens, so a ban could shift demand back to regulated dispensaries. That's an analytical read, not a forecast Fortune attributes to any named analyst.

The procedural clock

The ban takes effect one year after enactment, which puts the deadline in mid-November 2026.

Weeks remain. That's tight for any manufacturer sitting on inventory, supply contracts and packaging built around the old definition.

A different outcome would take new legislation passing both chambers and reaching the president's desk. The Fortune report doesn't identify an enacted delay.

What operators are weighing

Hemp businesses have three realistic paths: reformulate below the cap, seek state licenses, or shut down.

Reformulation likely guts the product's appeal. State licensing depends on whether local markets are open to new entrants, and many are capped. For full background on this story, see the CannIntel topic hub on the federal hemp loophole.

The next signal: whether Congress attaches a delay or a regulatory framework to a must-pass bill before the November 2026 effective date. Absent that, look for FDA and DEA guidance on enforcement.